TWI645045B - A seperation method of cerium oxide abrasive and glass powder - Google Patents

Abstract

The invention relates to a method for separating cerium oxide polishing powder and glass powder, which directly separates the cerium oxide polishing powder and the glass powder in the powder mixture, including pretreatment, dispersion treatment, adjustment of pH value treatment, addition of collector treatment, mixing Treatment, static treatment, centrifugal treatment, and drying treatment. In particular, an organic solvent is added during the mixing treatment to produce an organic solvent phase and an aqueous phase which are incompatible with each other and separated from each other, and the surfactant is used to change the surface activity under a suitable acid and alkali to make the cerium oxide polishing powder or The glass powder is enriched in an organic solvent phase or an aqueous phase to achieve separation efficiency. Therefore, the present invention does not generate secondary polluted wastewater, and consumes less energy, and does not require special equipment, so that the overall operation and maintenance are simple.

Description

Method for separating cerium oxide polishing powder and glass powder

The invention relates to a method for separating a cerium oxide polishing powder and a glass powder, in particular, using deionized water, an organic solvent to produce an aqueous phase and an organic solvent phase, and adding a pH adjusting agent to obtain an optimum pH value. The interface property of the surfactant enhances the separation efficiency, thereby improving the stability and separation and recovery efficiency of the cerium oxide polishing powder, the glass powder in the whole aqueous phase and the organic solvent phase, and avoiding the problem of secondary pollution of the wastewater.

At present, rare earth metals have been widely used in many electronic, mechanical, and aerospace industries. Among them, cerium (Ce) can be used as an oxidant, polishing powder, yellow dye for glass and porcelain, and petroleum refining liquid catalytic process (FCC) catalyst. Caused the industry to pay attention to recycling and reuse technology.

Further careful analysis, because 铈 can absorb ultraviolet and infrared rays, has been widely used in automotive glass, for example, as a glass additive, not only can prevent ultraviolet rays, but also reduce the temperature inside the car, thereby saving air conditioning electricity. In addition, car exhaust purification catalysts also use helium, which can effectively prevent a large amount of automobile exhaust gas from being discharged into the air. In pigments, coatings, inks and papers, barium sulfide can replace metals that are harmful to the environment and humans, such as lead and cadmium. It can be used not only for coloring plastics, but also for coatings, inks and paper. In addition, on advanced solid-state lasers, the Ce:LiSAF laser system solid-state laser has been developed in the United States. It can also be used to probe biological weapons or in medical applications by monitoring the concentration of tryptophan.

In addition, bismuth is also used in the cerium oxide-based polishing powder used for polishing and polishing of optical glass such as lenses and lenses. In general, the cerium oxide-based polishing powder is produced by processing a mineral containing a rare earth metal compound such as Monazite (monistry, xenotime) and the like by sintering or pulverization. Since cerium oxide has chemical reactivity with cerium oxide, a main component of glass, it is used as a polishing powder raw material for chemical mechanical polishing (CMP) used in precision polishing.

In recent years, with the rapid growth of the electronic information industry, the use of flat transparent glass such as photomasks and flat panel displays has increased, and the demand for cerium oxide-based polishing powder has also increased.

At present, in the production process of glass such as panel glass and optical lens, the cerium oxide-based polishing powder is mainly dispersed into water into a polishing liquid, and then used for polishing and polishing the glass to remove fine particles generated by etching and thinning treatment. Smudges. However, the polishing waste liquid produced after the grinding contains a fine particle mixture of cerium oxide-based polishing powder and glass crumb powder mainly composed of a rare earth metal such as cerium oxide, and may be deteriorated by the polishing powder after being used for a while. The glass crumb powder is mixed into the polishing powder, and the original polishing and polishing speed cannot be maintained, or the glass surface is damaged or even discarded, thereby generating a large amount of cerium oxide glass polishing waste. Generally, the simplest processing method is to directly perform the buried treatment, and the effective separation and recovery are not performed, resulting in waste of rare earth metal resources.

In order to solve the above problems, conventional techniques for recovery include strong acid oxidation heat treatment, strong acid-hydrogen peroxide impregnation, chlorination volatilization, strong alkali impregnation, froth flotation and heat treatment, strong alkali method plus sodium fluoride, and coagulation and many more. Although this type of method can recover rare earth metals from bismuth oxide glass polishing waste, there are also a large number of chemicals such as strong acids and alkalis, which are expensive to process and consume a lot of energy during high temperature processing. Secondary pollution wastewater is generated during the recovery process.

Specifically, in the strong acid oxidation heat treatment, the coagulant is first removed with oxalic acid, and the glass frit is dissolved by using a sodium hydroxide solution, sieved through a 1450 mesh, dried at 90 ° C for 2 hours, and fired at a high temperature of 600 ° C for 2 hours. Thereafter, 6N sulfuric acid was added, and Na ₂ SO ₄ was further added thereto to carry out a reaction at 50 ° C for 4 hours to remove rare earth elements other than cerium, followed by selective precipitation to increase the purity of cerium to 94% while completely removing cerium. The optimum conditions for the precipitation of the rare earth salt using sodium sulfate are Na ₂ SO ₄ / RE = 0.5, and the yield is about 60%.

The strong acid-hydrogen peroxide impregnation method utilizes a mixture of HNO ₃ /H ₂ O ₂ to dissolve the cerium oxide polishing waste, and precipitates a rare earth metal such as cerium oxide as a carbonate compound, and then converts the rare earth metal from carbonate by high temperature baking. Oxide. This method produces 0.8 kg of new polishing powder from 1 kg of polishing waste.

The chlorination volatilization method is a chlorination and volatilization reaction of a rare earth metal such as cerium oxide in a cerium oxide-based glass polishing waste by using a mixed gas of chlorine gas/nitrogen gas. The difference between the chloride volatilization temperature of the rare earth metal (800-900 ° C) and the chloride volatilization temperature of other metals. For example, cobalt or nickel chloride is 500-700 ° C, iron-copper-aluminum chloride is below 350 ° C), and the highest grade is about 80% of LaCl ₃ and CeCl ₃ .

The hydrometallurgy method is used to separate rare earth elements (REE) and rare earth oxides from rare earth polishing wastes (REPPWs). The main component is cerium oxide, followed by cerium oxide, cerium oxide and cerium oxide. The technical means consists of five parts: the first part, using NaSO ₄ -H ₂ SO ₄ -H ₂ O to react with REPPWs at 95-125 ° C to form NaRE(SO ₄ ) ₂ ∙H ₂ O; the second part, adding NaOH NaRE(SO ₄ ) ₂ ∙H ₂ O forms RE(OH) ₃ ; the third part, O _{2 is} used to oxidize Ce(OH) ₃ to Ce(OH) ₄ , which is beneficial to the presence of ruthenium in the main phase of REPPWs Separated from other REE; the fourth part, acid leaching with HCl at 25 ° C to pH between 2.5 and 3.5, after leaching, a high yield of REE other than Ce can be obtained; in the fifth part, the residue is added with H ₂ SO ₄ Separate Ce.

However, the above-mentioned conventional techniques have disadvantages in that a large amount of expensive chemicals and high-temperature treatments that consume a large amount of energy are required, and particularly, secondary pollution wastewater is generated in the recycling process.

Therefore, there is a great need for an innovative separation method of cerium oxide polishing powder and glass powder, which can directly separate the mixed powder of cerium oxide polishing powder and glass crumb powder to recover cerium oxide polishing powder, which can promote cerium oxide polishing powder. Recycling can also be used as a secondary resource for various rare earth metals to solve all the problems of the above-mentioned conventional technologies.

The main object of the present invention is to provide a method for separating cerium oxide polishing powder and glass powder, which is used for separating and recycling cerium oxide polishing powder and glass powder in a powder mixture, mainly including the following steps. Processing steps.

First, pretreatment is carried out, and deionized water is added to the original mixture containing the cerium oxide polishing powder and the glass powder, and mixed into a powder mixed slurry. The weight ratio of the cerium oxide polishing powder and the glass powder in the original mixture is between 100:1 and 1:1, respectively. Next, dispersion treatment is performed, and the cerium oxide polishing powder and the glass powder of the powder mixed slurry are dispersed by an ultrasonic disperser, and the dispersion treatment is performed for two minutes to two hours.

Then, adding a pH adjuster or a pH adjuster to adjust the pH value of the powder mixed slurry to a target pH value, for example, the target pH value may be pH 4 to Between pH10. Adding a collector treatment, adding a collector as a surfactant to capture a cerium oxide polishing powder or a glass powder contained in the powder mixed slurry, wherein the collector may be an anion collector Or a cationic collector, and the concentration of the collector can be between 0.5 kg/ton and 10.0 kg/ton.

Then, in the mixing process, the powder mixed slurry is subjected to preliminary mixing by using the shaking force generated by the oscillating machine, and the operation time is between two minutes and two hours, and then an organic solvent is added, wherein the organic solvent is not mutually soluble. Ionic water, and the weight ratio of the organic solvent to the deionized water is between 100:1 and 1:1, and the powder mixture is formed by advanced mixing using a shaker, and the operation time of the advanced mixing is two minutes to Between two hours.

The powder mixture is allowed to stand for at least twenty minutes to form an organic solvent phase solution and an aqueous phase solution separated from each other, and then the organic solvent phase solution and the aqueous phase solution are respectively taken out, wherein the organic solvent phase solution and the aqueous phase solution are respectively respectively Rich in cerium oxide polishing powder or rich in the glass powder. After centrifugation, the organic solvent phase solution and the aqueous phase solution are respectively separated by the centrifugal force generated by the corresponding centrifuge to separate the solid matter and the liquid therein, and the solid matter is taken out, wherein the organic solvent phase solution is solid or water phase. The solid system contains cerium oxide polishing powder or glass powder.

Finally, the drying process is performed, and the solid matter taken out from the organic solvent phase solution or the solid matter taken out from the aqueous phase is heated by a dryer to evaporate and remove the residual liquid, thereby respectively obtaining cerium oxide polishing powder or glass. Powder, to achieve the purpose of recycling.

Therefore, the present invention can directly and effectively separate the cerium oxide polishing powder and the glass powder in the original mixture by using the mutually separable organic solvent phase and the water phase without generating secondary pollution wastewater, and not only consume less energy. Because it can also greatly improve the overall separation effect. In addition, the present invention does not need to be configured with a special device, that is, can be implemented by a general separation device, so that the operation cost is low, and the overall operation and maintenance are simple.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the reference numerals, which can be implemented by those skilled in the art after having studied this specification.

Referring to the first figure, a schematic diagram of a method for separating cerium oxide polishing powder and glass powder according to an embodiment of the present invention. As shown in the first figure, the method for separating the cerium oxide polishing powder and the glass powder of the present invention comprises the steps S10, S20, S30, S40, S50, S60, S70 and S80 which are sequentially performed, respectively, pre-processing, dispersion processing, and adjustment. The pH treatment, the addition of the collector treatment, the mixing treatment, the static treatment, the centrifugation treatment, and the drying treatment are used to separate and recover the cerium oxide (CeO ₂ ) polishing powder and the glass powder in the original powder mixture. Reuse.

At the same time, reference may also be made to the second figure for a preliminary understanding of the efficacy to be achieved by the separation method of the present invention, wherein the left side of the second figure shows that the glass powder G in the original powder mixture is adhered to the surface of the cerium oxide polishing powder P because the glass powder G is generally smaller than the cerium oxide polishing powder P, and the middle portion of the second figure shows that after the dispersion treatment, the glass powder G and the cerium oxide polishing powder P have been substantially dispersed and separated from each other, and the right side of the second figure shows the glass powder G. And the cerium oxide polishing powder P is finally recovered by the static treatment, the centrifugal treatment, and the drying treatment of the present invention.

First, the pretreatment is performed in step S10, comprising adding an appropriate amount of deionized water to the original mixture containing the cerium oxide polishing powder and the glass powder, and mixing into a powder mixed slurry, wherein the cerium oxide polishing powder and the glass powder are The original mixture has a weight ratio of between 100:1 and 1:1, and the original mixture has a particle size range of 0.2 μm to ~60.5 μm and an average particle diameter (D ₅₀ ) of 1.8 μm to 3.5 μm.

Since the original mixture may contain substances such as impurities, dispersants or lubricating fluids, which may cause changes in the surface properties of the actual sample, in order to avoid affecting the overall separation and recovery effect, it may additionally include filtration treatment or degreasing treatment in the pretreatment. In order to remove particulate impure substances or oily lubricating fluids separately, and corresponding effective separation treatment for the characteristics of the dispersing agents.

Next, the dispersion treatment in the step S20 is carried out, mainly by dispersing the cerium oxide polishing powder and the glass powder adhered to each other in the powder mixed slurry by means of an ultrasonic disperser, wherein the entire dispersion treatment is carried out for two minutes to two hours.

Adjusting the pH value in step S30, adding a pH adjuster to adjust the pH value of the powder mixed slurry to a target pH value, wherein the pH adjuster may be an acid regulator or an alkali regulator . For example, the acid regulator may be at least one of hydrochloric acid and nitric acid, and the alkaline regulator may be at least one of sodium hydroxide and potassium hydroxide. In addition, the target pH value can be between pH 4 and pH 10.

Then, proceeding to step S40, an additive collector treatment is performed, and a collector is added to act as a surfactant, wherein the collector may be an anion collector or a cationic collector for oxidizing the powder mixed slurry.铈 Polishing powder or glass powder produces a trapping effect. The concentration of the collector in the organic solvent can range from 0.5 kg/ton to 10.0 kg/ton. For example, the collector comprises one of Sodium Dodecyl Sulfate (SDS), Sodium Oleate (NaOL), and Dodecylamine Acetate (DAA). It should be noted that the target pH value in step S30 must match the collector used in step S40 to improve the overall efficiency. For example, when using SDS, the target pH value is between pH 8.0 and pH 9.5. When NaOL is used, the target pH value is between pH 7 or pH 7 to pH 7.5, and when DAA is used, the target pH value is between pH 8.0 and pH 9.5.

Proceeding to step S50, the mixing process is performed, mainly by using a swinging machine, and the powder mixing slurry is subjected to preliminary mixing by the generated shaking force, and the operation of the preliminary mixing is maintained for two minutes to two hours, and then added. The organic solvent is fixed, and the organic solvent is not mutually soluble in deionized water, and is further mixed by a shaker to form a uniformly mixed powder mixture, and the operation of the advanced mixing is maintained for two minutes to two hours. In particular, the weight ratio of organic solvent to deionized water may be between 100:1 and 1:1, and the organic solvent comprises isooctane, dodecane or kerosine.

Thereafter, the static treatment in step S60 is performed, and the powder mixture is allowed to stand for at least twenty minutes to form an organic solvent phase solution and an aqueous phase solution separated from each other, wherein the organic solvent phase solution is generally in the aqueous phase solution due to specific gravity. Above. At the same time, the organic solvent phase solution and the aqueous phase solution are separately taken out, for example, separated and taken out using a general separatory funnel. It should be noted that when SDS and NaOL are used as the collector, the organic solvent phase solution is rich in cerium oxide polishing powder, and the aqueous phase solution is rich in glass powder. When DAA is used as a collector, the organic solvent phase solution is rich in glass frit, and the aqueous phase solution is rich in cerium oxide polishing powder.

In step S70, the centrifugation process is performed, mainly, the organic solvent phase solution and the aqueous phase solution obtained in step S60 are respectively subjected to solid-liquid separation by the centrifugal force generated by using the corresponding centrifuge, and then separated and taken out. The solid at the bottom and the clarified liquid at the top. Specifically, when SDS and NaOL are used as the collector, the solid matter of the organic solvent phase solution mainly contains cerium oxide polishing powder, and the solid matter of the aqueous phase solution mainly contains glass frit. When DAA is used as a collector, the organic solvent phase solution is rich in glass frit, and the aqueous phase solution is rich in cerium oxide polishing powder.

Finally, the process proceeds to step S80 to perform the drying process, and the solid matter obtained in step S70 is heated by the dryer to evaporate and remove the residual liquid, thereby obtaining cerium oxide polishing powder and glass powder to achieve recovery. purpose.

To further illustrate the efficacy achieved by the present invention, exemplary examples are listed below.

First, the organic solvent was isooctane and SDS was used as a collector, and the mixing ratio of the cerium oxide polishing powder to the glass powder was 1:1, and the results showed a third A chart and a third B chart.

The grade and recovery of the glass powder in the cerium oxide polishing powder and the aqueous phase recovery in the isooctane phase recovery at various pHs under the addition of 1 kg/ton and 2.5 kg/ton SDS, with the pH value The increase is increased, and at about pH 9, the best grade is 86.8% when adding 2.5 kg/ton SDS, and the recovery rate is 91.7%. However, when it is greater than pH 9, the grade and recovery rate are decreased. . In addition, the grade and recovery of the glass powder in the aqueous phase recovery also increased with the increase of pH value and the increase of SDS addition, and at the pH of about 9, the best grade was added by adding 2.5 kg/ton SDS. 91.2%, the recovery rate is 86%, however, when it is greater than pH 9, the grade and recovery rate are reduced.

In addition, the fourth graph is the separation efficiency of the above exemplary examples, showing the amount of SDS added at pH 9 and the grade and recovery of the glass powder in the cerium oxide polishing powder and the aqueous phase recovery in the isooctane phase recovery. Obviously, as the amount of SDS added increases, the grade and recovery of the glass powder in the cerium oxide polishing powder and the aqueous phase recovery in the isooctane phase recovery increase, and the best result is the addition of 10 kg/ton SDS. At this time, the grade of cerium oxide polishing powder in the isooctane phase recovery is 100%, and the recovery rate is up to 94.2%, and the grade and recovery rate of the glass powder in the aqueous phase recovery are 94.6% and 100, respectively. %. The cerium oxide polishing powder is almost completely separated from the glass powder.

Further referring to FIGS. 5A and 5B, if NaOL is used as the surfactant, the mixing ratio of the cerium oxide polishing powder to the glass powder is 1:1.

When adding 1 kg/ton and 2.5 kg/ton NaOL, the grade and recovery of the glass powder in the cerium oxide polishing powder and the aqueous phase recovery in the isooctane phase recovery at each pH, wherein the isooctane phase recovery The grade and recovery of the cerium oxide polishing powder increased with the increase of pH value. At about pH 7, the addition of 2.5 kg/ton NaOL had the best grade of 78.3%, and the recovery rate was 93.7%. At pH 7, the grade and recovery rate decreased. Furthermore, the grade and recovery of the glass powder in the aqueous phase recovery also increased with the increase of pH value, and at about pH 7, the best grade that can be achieved by adding 2.5 kg/ton NaOL was 91.3%, and the recovery rate was 91.3%. It was 77.4%, but when it was greater than pH 7, the grade and recovery rate decreased.

As shown in the sixth figure, at about pH 7, the grade and recovery of the glass powder in the cerium oxide polishing powder and the aqueous phase recovery in the isooctane phase recovery are both increased with the addition of NaOL. The best result is that when 7.5 kg/ton NaOL is added, the grade of cerium oxide polishing powder in the isooctane phase recovery is 94.5 %, the recovery rate is 99%, and the grade of the aqueous phase glass powder is 99%. The recovery rate was 94.7%. The cerium oxide polishing powder is almost completely separated from the glass powder.

Another example is shown in which the collector is DAA and the cerium oxide polishing powder is 1:1 mixed with the glass powder.

As shown in Figures 7A and 7B, the grade and recovery of the glass powder in the cerium oxide polishing powder and the isooctane phase recovery in the aqueous phase recovery at 1 kg/ton and 2.5 kg/ton DAA were added. rate. When adding 2.5 kg/ton DAA, the grade and recovery of cerium oxide polishing powder in the aqueous retentate increased with the increase of pH value, and at pH 9, the best grade was 72.7%, and the recovery rate was 100%. However, when it is greater than pH 9, the grade and recovery rate are decreased. In addition, when adding 2.5 kg/ton DAA, the grade and recovery rate of the glass powder in the isooctane phase recovery also increase with the increase of pH value. At pH 9, the best grade was 98.9%, and the recovery was 62.7%. However, when it was greater than pH 9, the grade and recovery rate decreased.

Further, as shown in the eighth figure, the DAA addition amount to the grade and recovery rate of the glass powder in the cerium oxide polishing powder and the isooctane phase recovery in the aqueous phase recovery at pH 9, wherein the water increases as the amount of DAA increases. The grade and recovery rate of the glass powder in the cerium oxide polishing powder and the isooctane phase recovery in the phase recovery increased. The best result is that when adding 2.5 kg/ton DAA, the grade of cerium oxide polishing powder in the aqueous phase recovery is 72.7 %, the recovery rate is 99.3%, and the grade of isooctane phase glass powder is 98.9%. The recovery rate was 62.7 %.

In summary, the present invention is characterized in that the cerium oxide polishing powder and the glass powder in the original mixture are effectively separated by using an organic solvent phase and an aqueous phase which are separable from each other, and the energy consumed is less, especially not secondary. Polluted wastewater can greatly enhance the overall separation effect.

In addition, the method of the present invention can directly separate the mixed powder of the cerium oxide polishing powder and the glass crumb powder, and separate and recover the cerium oxide polishing powder from the cerium oxide glass polishing waste, thereby, in addition to promoting the cerium oxide polishing powder. In addition to recycling, it can also be used as a secondary resource for various rare earth metals.

Another feature of the present invention is that the optimum pH value is adjusted according to the characteristics of the organic solvent and the trapping agent, so that the subsequently added trapping agent can exert the optimal trapping effect, and thus in the organic solvent phase or in the aqueous phase. Can be enriched with the required cerium oxide polishing powder or glass powder.

Since the present invention can be implemented in a general separation apparatus without additionally designing a special device, the industrial utilization is quite high and it is very competitive in the market. Moreover, the techniques of the present invention have not been disclosed in the prior art, and thus have technical novelty and advancement.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

S10~S80‧‧‧Steps

G‧‧‧Glass powder

P‧‧‧Oxide polishing powder

The first figure shows a schematic view of a method of separating cerium oxide polishing powder from glass frit according to an embodiment of the present invention. The second figure shows the specific efficacy to be achieved by the separation method of the present invention. Figures 3A and 3B show specific separation efficacies achieved at different pH values for an exemplary embodiment of the invention. The fourth figure is the separation efficiency of the invention according to the examples of the third A and the third B at pH 9. Figures 5A and 5B show a specific separation efficiency achieved at different pH values by another illustrative example of the invention. The sixth figure is the separation efficiency of the present invention at pH 7 according to the examples of Figs. 5A and 5B. Figures 7A and 7B show another exemplary embodiment of the invention achieving specific separation efficacies at different pH values. The eighth figure is the separation efficiency of the present invention at pH 9 according to the examples of Figs. 7A and 7B.

Claims (5)

A method for separating cerium oxide polishing powder and glass powder comprises: pre-treatment, adding deionized water to an original mixture containing cerium oxide polishing powder and a glass powder, and mixing into a powder mixed slurry; Using an ultrasonic disperser to disperse the cerium oxide polishing powder and the glass powder in the powder mixed slurry, and the dispersion treatment is performed for two minutes to two hours; An acidity adjuster or a pH adjuster of an alkali adjuster to adjust the pH value of the powder mixed slurry to a target pH value; a addition of a collector treatment, added as a surfactant a trapping agent for collecting the cerium oxide polishing powder or the glass powder contained in the powder mixed slurry, and the collecting agent is an anion trapping agent or a cation trapping agent; And using a shaking force generated by a shaker to perform a preliminary mixing of the powder mixed slurry, and the preliminary mixing system is carried out for between two minutes and two hours, after which an organic solvent is added, and the organic solvent is Mutually soluble in the deionized water, and subjected to an advanced mixing by the shaker to form a powder mixture, and the advanced mixing system is carried out for between two minutes and two hours; after a static treatment, the powder mixture is allowed to stand still After being disposed for at least twenty minutes, an organic solvent phase solution and an aqueous phase solution separated from each other are formed, and the organic solvent phase solution and the aqueous phase solution are respectively taken out, wherein the organic solvent phase solution and the aqueous phase solution are respectively rich. Containing the cerium oxide polishing powder or enriching the glass powder; After centrifuging, the organic solvent phase solution and the aqueous phase solution are respectively subjected to centrifugal force generated by a corresponding centrifuge to separate the solid matter and the liquid therein, and the solid matter is taken out, and the solid solvent phase solution is solid. Or the solid phase of the aqueous phase comprises the cerium oxide polishing powder or the glass powder; and a drying treatment, the solid or the aqueous phase taken out from the solution of the organic solvent phase by using a dryer The solid material taken out is heated to remove the residual liquid to obtain the cerium oxide polishing powder or the glass powder, wherein the cerium oxide polishing powder and the glass powder have a weight ratio of 100:1 in the original mixture respectively. Between 1:1, the target acid-base value is between pH 4 and pH 10, and the concentration of the collector in the organic solvent is between 0.5 kg/ton and 10.0 kg/ton, and the organic solvent is the deionized water. The organic solvent comprises isooctane, dodecane or kerosine in a weight ratio of 100:1 to 1:1, and the collector comprises sodium lauryl sulfate (Sodium) Dodecyl Sulfate, SDS), sodium oleate (Sod One of ium Oleate, NaOL) and Dodecylamine Acetate (DAA), when the collector is SDS, the target pH value is between pH 8.0 and pH 9.5, and the capture When the concentration agent is NaOL, the target acid-base value is between pH 7 or pH 7 to pH 7.5, and when the collector is DAA, the target acid-base value is between pH 8.0 and pH 9.5. The method for separating cerium oxide polishing powder and glass powder according to claim 1, wherein the acid adjusting agent comprises at least one of hydrochloric acid and nitric acid, and the alkaline adjusting agent comprises at least one of sodium hydroxide and potassium hydroxide. one of them. a method for separating cerium oxide polishing powder and glass powder according to claim 1 of the patent application, wherein the original mixture has a particle size range of 0.2 μm to -60.5 μm, and an average particle diameter (D ₅₀ ) of the original mixture is 1.8 Mm to 3.5 μm. The method for separating cerium oxide polishing powder and glass powder according to claim 1 of the patent application, wherein the organic solvent phase solution and the aqueous phase solution are separated by a separatory funnel. a method for separating cerium oxide polishing powder and glass powder according to claim 1 of the patent application, wherein the pretreatment is performed by a filtration treatment and/or a degreasing treatment to separately remove particulate impure substances contained in the original mixture, Oily lubricating fluid or cement.