TW200848371A - Method of recovering Cd-112 isotope - Google Patents

Abstract

The present invention is a method of recovering Cd-112 isotope to recover the isotope for recycling use. The method includes reacting a chemical separation media or an electroplating fluid residue including Cd-112 target with hydroxides to produce cadmium hydroxide precipitate; filtering and rinsing the precipitate to recover Cd-112 isotope; calcining the recovered Cd-112 isotope or dissolving the recovered Cd-112 isotope by sodium cyanide and an alkaline solution to form a solid cadmium oxide or an electroplating fluid including Cd-112 target, respectively, which can be used as a contrast media for imaging human organs for medical diagnosis.

Description

200848371 IX. Description of the Invention: [Technical Field] The present invention provides a method for recovering cadmium-112 isotope, and in particular, the present invention uses a chemical separation liquid or a plating solution of a cadmium-112 target to The hydroxide reaction produces a cadmium hydroxide precipitate which is then recovered by filtration to recover the cadmium-112 isotope. [Prior Art] The nucleon characteristic of indium-111 radioactive isotopes is the capture of electrons to release two additional gamma ray performance spectra. Due to its short half-life and moderate energy, it has been widely used in nuclear medicine single photon emission computed tomography (Single Photon). Emission Computerized Tomography, SPECT ) Diagnose t disease and physiological function of human body. Indium-111 flag compounds such as: inInC13, lnIn-bleomysin and mIn-DTPA (Octopeptide) can be used to identify local tumors, while inIn-Oxine fat-soluble compounds can be labeled in white blood cells for angiography and diagnosis of abscesses. Inflammation and other lesions, and 1πΙη and the monogenic antibodies, platelets, globulins or yt-PA (recommended tissue plasminogen activator) and Fab, (Fab') 2 (immunoglobulin fragments) and other compounds are the latest developments The contrast agent with good application potential can scan the correct position of myocardial infarction and thrombus and carry out related physiological research on thrombin and renal function. The main production pathways of indium-111 isotope are 112Cd(p, 2n), inCd(p, n), natCd(p, xn), 110Cd(d, n) and 109Ag(a, 2n), etc., 5 200848371 One way to obtain a maximum yield of luIn using a high abundance 112Cd (970/〇) solid target at a suitable target thickness (~ΙΟΟμηι) and proton beam energy 22 MeV). In the nuclear medicine and pharmaceutical center, the nuclear medicine oktoprost (Indium-111) was produced in a cyclotron. In China, it is impossible to produce similar isotopes, and the annual production of nuclear medicine Okpitonium (Indium-1U) is required. Cadmium-112 isotope, ', need to rely on imports, and access is not easy. Therefore, the general practitioners cannot meet the needs of the user in actual use. SUMMARY OF THE INVENTION The main object of the present invention is to provide a method for recovering cadmium-112 isotope which can save raw material cost = reduce cost, and has high recovery rate, and obtain cadmium-112 isotope with high purity. In order to achieve the above object, the present invention provides a method for recovering cadmium-112 isotope by adding a sulphide solution to a residual solution of a cadmium-112 target plating solution to produce a cadmium sulfide precipitate, and then utilizing The cadmium sulfide precipitate is dissolved by a hydrochloric acid to form a cadmium sulfide solution, and then mixed with a hydroxide solution to produce a cadmium hydroxide precipitate. Finally, the cadmium hydroxide precipitate is filtered and rinsed to recover the cadmium-112 isotope. In addition, the present invention may also firstly mix a cadmium-112 target chemical separation liquid with a cadmium bromide solution to form a mixed solution, and then add a hydroxide solution to the mixed solution and mix and stir to produce a cadmium hydroxide precipitate. Finally, the cadmium hydroxide precipitate was filtered and rinsed to recover the 200848371 • 112 isotope. [Embodiment] Please refer to the "1st and 2nd drawings" for a flow chart of a first embodiment of the present invention and a schematic flow chart of a second embodiment of the present invention. As shown in the figure: the present invention is a method for recovering cadmium "12 isotope" from the residual liquid of the 112 (4) (four) liquid or the chemical separation liquid of the dry material of 112 dry material, which is used to recover the wrong _112 isotope. The method for recovering the residual liquid of the liquid comprises at least the following steps: Step (A 1 ) Producing a cadmium sulfide sulphide material workmanship · Adding a sulphide solution to a residual solution of a cadmium _112 target plating solution to produce a vulcanization Recording (4) 'wherein, the sulfide solution can be a sodium sulfide solution, ... π step (B 1 ) to form an air money solution} 2: The sulfide precipitate is dissolved in monohydrochloric acid to form a vaporized cadmium solution. C 1 ) generating argon oxychloride precipitates 3: mixing the gas=cadmium solution into a monolithic oxide solution to produce a cadmium hydroxide precipitate, wherein the hexa hydroxide solution can be a hydrolytic solution or a hydroxide Sodium solution. Step (D 1 ) recovery of cadmium_112 isotope 4: The hydroxide ore deposit is transferred to a semi-automatic vacuum filtration system for transition and rinsing to recover the cadmium-112 isotope. _112 |& The method for recovering the separation liquid comprises at least the following steps: 200848371 Step (A 2 ) forming a mixed liquid 2 1 : mixing a cadmium-112 target chemical separation liquid with a cadmium bromide solution to form a mixed liquid. Step (B 2 Producing a cadmium hydroxide precipitate 2 2 ··taking a hydroxide solution and adding to the above mixture and stirring to produce a cadmium hydroxide precipitate, wherein the hydroxide solution may be a potassium hydroxide solution or It is a sodium hydroxide solution. Step (C 2 ) forms a cadmium-112 isotope 2 3 : The cadmium hydroxide sump material is transferred into a semi-automatic vacuum filtration system, and subjected to hydrazine and "washing" to recover the ore j-112 isotope. The ore-112 isotope recovered from the above two methods can be calcined into a solid oxidized ore, or dissolved in a cyanide solution and an assay solution to form a cadmium-112 target plating solution, and the cadmium-112 isotope recovery The rate can reach above 98%, the purity can reach about 99%, and it is easy to store. In summary, the method for recovering cadmium-112 isotope of the present invention is to recycle and recycle cadmium-112 isotope to recover the recovery rate and 98% purity In addition, it can also save the cost of purchasing raw materials and reduce the cost of nuclear medicine, so that the invention can be made more progressive, more practical, and more suitable for users. It has indeed met the requirements of the invention patent application. It is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the invention and the description of the invention should still be It is within the scope of the present invention. 200848371 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic flow chart of a first embodiment of the present invention. Fig. 2 is a flow chart showing a second embodiment of the present invention. [Main component symbol description] Step (A 1 )~(D 1 ) 1 1~1 4 Step (A2)~(C2)21~23

Claims (1)

200848371 X. Patent application scope: 1 · A method for recovering ore-112 isotope, the recovery method includes: (A 1 ) adding a sulfide solution to a record - 112 1 ^ material electro-mineral liquid remaining in the liquid a cadmium sulfide precipitate; (B 1 ) the sulfide precipitate is dissolved in monohydrochloric acid to form a cadmium vapor solution; (C 1 ) the cadmium vapor solution is added to a hydroxide solution to produce a cadmium hydroxide precipitate And (D 1 ) filtering and rinsing the cadmium hydroxide precipitate to recover the money-112 isotope. (2) The method for recovering cadmium.112 isotope according to the first paragraph of the Chinese Patent No. 1, wherein the sulfide solution is a sodium sulfide solution. 3 The method according to claim 1, wherein the hydroxide solution is a sodium hydroxide solution or a potassium hydroxide solution. 4 · A method for recovering cadmium-112 as described in claim 1 wherein the recovered cadmium-112 isotope is calcined to form a solid cadmium oxide. Same position by ^ According to the application of the 4 patent scope! The method for recovering tin·ιΐ2 in situ according to the item, wherein the recovered cadmium-112 isotope system can be dissolved by a cyanide solution and an alkaline solution by using 200848371 to form a cadmium_丨丨2 target electric forging liquid. . 6 · A method for recovering cadmium-112 isotope, the recovery method comprises: (A 2 ) mixing a cadmium-112 target chemical separation liquid with a bromination recording solution to form a mixed solution; (B 2 ) A wind oxide solution is added to the mixture to mix and mix to produce a cadmium hydroxide precipitate; and (C 2 ) the cadmium hydroxide precipitate is filtered and rinsed to recover the cadmium-112 isotope. A method of recovering ore_112 isotopes according to claim 6 wherein the hydroxide solution is a sodium hydroxide solution or a potassium hydroxide solution. 8. The method of recovering IU2 isotopes according to claim 6 of the patent application, wherein the recovered cadmium-112 isotope is formed by calcination to form a solid cadmium oxide. 9 A method for recovering ore isotopes according to claim 6 of the patent application scope wherein the recovered cadmium-112 ortho-saturated solution dissolves with the test solution to form a plating solution. Electricity