CN1029312C - Composite organic solvent for recovering maleic anhydride - Google Patents
Composite organic solvent for recovering maleic anhydride Download PDFInfo
- Publication number
- CN1029312C CN1029312C CN 91105906 CN91105906A CN1029312C CN 1029312 C CN1029312 C CN 1029312C CN 91105906 CN91105906 CN 91105906 CN 91105906 A CN91105906 A CN 91105906A CN 1029312 C CN1029312 C CN 1029312C
- Authority
- CN
- China
- Prior art keywords
- organic solvent
- solvent
- maleic anhydride
- composite organic
- recovering maleic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000003960 organic solvent Substances 0.000 title claims abstract description 9
- 239000002131 composite material Substances 0.000 title abstract 3
- 239000002904 solvent Substances 0.000 claims abstract description 16
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims abstract description 10
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 3
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 3
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 3
- 238000004821 distillation Methods 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 231100000956 nontoxicity Toxicity 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 150000008065 acid anhydrides Chemical class 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 maleic acid ester Chemical class 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 206010067171 Regurgitation Diseases 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 125000005480 straight-chain fatty acid group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention relates to a preparation method of composite organic solvent, said composite solvent is mainly used for recovering maleic anhydride prepared by catalytic oxidation of hydrocarbon, and is made up by using dioctyl phthalate and refinery dewaxing finished product oil as basic solvent according to a certain formula.
The invention has the advantages of good absorptivity and evapotranspiration, low freezing point, strong selectivity, high thermal and chemical stability, no toxicity, rich raw material source, low price and the like, and has extremely wide application prospect in industrial production.
Description
The invention belongs to a kind of compound method of novel organic double solvents.
In industrial production, MALEIC ANHYDRIDE [
, be called for short cis-butenedioic anhydride] majority is that to adopt with water be the technology of absorption agent, this method not only energy consumption is big, and in absorption process since along the generation of sour and sour regurgitation corrode and occluding device very serious, and total recovery is lower.In recent years, people set about adopting non-aqueous solvent to reclaim the research of maleic anhydride process, and obtained certain progress, known main the having of organic solvent that can be used for absorbing cis-butenedioic anhydride at present: bialkyl ortho phthalate, straight chain fatty acid dialkyl, maleic acid ester, hydrogenation phthalic acid, olefin butyric anhydride, dewaxing etc.But they all have such and such problem on processing performance, and it is serious for example to have plenty of volatile loss, and the receptivity that has is poor, have plenty of heat and poor chemical stability, the zero pour height, it is big to have plenty of toxicity, it is very expensive to have plenty of price, and the former capital is difficult to Application and Development.Therefore, seek a kind of compound organic solvent of advantage with good comprehensive performances that can several solvents of collection and generate one of research topic that cis-butenedioic anhydride in the gas then becomes people and attracted attention in order to absorption reaction.
The object of the present invention is to provide a kind of compound organic solvent to produce cis-butenedioic anhydride from hydrocarbon catalyticing oxidation and react the cis-butenedioic anhydride that generates the gas in order to absorption with premium properties.
Technical characterictic of the present invention is to select the kind of organic solvent and the method for preparation.
The present invention adopt dioctyl phthalate (DOP) [molecular structural formula,
Code name is: DOP] be basic solvent, and then add the processed oil [code name: L01] of refinery second line of distillation dewaxing, this oil is generally made lubricating oil and is used.Its performance index are: initial boiling point is 350～450 ℃, and zero pour is that (10)～(+15) ℃ proportion is 0.88～0.89, and viscosity is 28～32CP(40 ℃).The blending ratio of dioctyl phthalate (DOP) and second line of distillation dewaxing processed oil is: (50～70%): (30%～50%) (weight ratio).The solvent that proportioning is according to the above ratio become places and absorbs and steam and take off the study on the stability that carried out under the processing condition 1000 hours, double solvents is not seen chemistry and physical change phenomenon, to decomposite the maximum level of phthalic anhydride in solvent be 3.8～4.2% and single dioctyl phthalate (DOP) is investigated test under similarity condition, dibutyl phthalate decomposes out the maximum level of acid anhydride in solvent and can reach more than 50%, and continues to change.
Join the double solvents of getting by above-mentioned technical characterictic and have good absorptive character as the absorption agent that reclaims cis-butenedioic anhydride.Be 38mm for example at diameter, the actual plate number is in 30～48 the sieve-tray tower equipment, cis-butenedioic anhydride content is at 1%(mol in generating entraining air stream) about, water content is the 10%(weight ratio) time, adopt solvent of the present invention as absorption agent, be 101.325KPa at working pressure, tower top temperature is at 45 ℃～80 ℃, column bottom temperature is at 100 ℃～130 ℃, and liquid, gas are that maximum absorbance can reach more than 99% under 0.30～0.4 the operating mode than (L/V) (weight ratio).And the present invention also has good recovery, for example the absorption liquid after absorbing, be provided with 6～14 actual block at stripping section, rectifying section is provided with to steam in the sieve-tray tower of 10～15 actual plates and takes off, when the tower working pressure is the 9.333KPa(absolute pressure), it is more than 99.8% that cat head obtains cis-butenedioic anhydride content, containing the cis-butenedioic anhydride amount in the tower base solvent is 0.8%～0.3%, (weight ratio) can satisfy fully and return the requirement of making absorption agent in the absorption tower again, can realize recycling of solvent.The loss amount of solvent is only below 0.007 in the process that steaming is taken off.(kg solvent/kg acid anhydride reclaims)
The present invention not only has excellent absorption and performance is taken off in steaming, and zero pour is low, selectivity is strong but also have, heat and chemical stability height, low, the nontoxicity of wetting ability.Characteristics such as raw material sources are abundant, inexpensive have extremely broad prospect of application on industrial production.
Claims (1)
1, a kind of compounded organic solvent that is used to reclaim the MALEIC ANHYDRIDE of producing by hydrocarbon catalyticing oxidation, it is characterized in that: this compounded organic solvent is to adopt dioctyl phthalate (DOP) and refinery's second line of distillation dewaxing processed oil [this oiliness energy index: initial boiling point: 350-450 ℃, zero pour,-10-15 ℃, proportion: 0.88-0.89, viscosity: 28-32CP (40 ℃)] be basic solvent, and both press the mixed formulated (weight ratio) of 50-70% and 30-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105906 CN1029312C (en) | 1991-08-22 | 1991-08-22 | Composite organic solvent for recovering maleic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105906 CN1029312C (en) | 1991-08-22 | 1991-08-22 | Composite organic solvent for recovering maleic anhydride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1062344A CN1062344A (en) | 1992-07-01 |
| CN1029312C true CN1029312C (en) | 1995-07-12 |
Family
ID=4907400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105906 Expired - Fee Related CN1029312C (en) | 1991-08-22 | 1991-08-22 | Composite organic solvent for recovering maleic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029312C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2595974B1 (en) | 2010-12-13 | 2016-03-09 | Conser S.P.A. | An improved process for recovery of maleic anhydride by using organic solvent |
-
1991
- 1991-08-22 CN CN 91105906 patent/CN1029312C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1062344A (en) | 1992-07-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |