RO108002B1 - Zinc recovery process from solutions with organic substances content - Google Patents
Zinc recovery process from solutions with organic substances content Download PDFInfo
- Publication number
- RO108002B1 RO108002B1 RO147375A RO14737591A RO108002B1 RO 108002 B1 RO108002 B1 RO 108002B1 RO 147375 A RO147375 A RO 147375A RO 14737591 A RO14737591 A RO 14737591A RO 108002 B1 RO108002 B1 RO 108002B1
- Authority
- RO
- Romania
- Prior art keywords
- zinc
- organic substances
- solutions
- methyl
- imidazole
- Prior art date
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Invenția se referă la un procedeu de recuperare a zincului din soluții cu conținut de substanțe organice. Pentru aceasta o soluție cu conținut de substanțe organice (de preferință azotat de 2-metil-imidazol), zinc, acid azotic, provenită din sinteza de medicamente de uz uman și veterinar, se tratează cu o soluție de hidroxid de sodiu, sub agitare. Zincul precipită sub forma unui complex cu solubilitate redusă (de preferință Zn-Z2-metil-imidazol), care se separă din masa de reacție prin filtrare sau centrifugare. Complexul de zinc poate fi reutilizat în proces. Randamentul de recuperare al zincului este de peste 99 %.The invention relates to a process of zinc recovery from solutions containing organic substances. For this a solution with content of organic substances (preferably nitrogen 2-methyl-imidazole), zinc, nitric acid, sourced from the synthesis of medicines for human use and veterinary, is treated with a hydroxide solution sodium, stirring. Zinc precipitates as a low solubility complex (preferably Zn-Z2-methyl-imidazole), which separates from the mass of reaction by filtration or centrifugation. The complex of zinc can be reused in the process. Yield of zinc recovery is over 99%.
Description
Invenția se referă la un procedeu de recuperare a zincului din soluții cu conținut de substanțe organice, rezultate din fabricația de medicamente de uz uman și veterinar.The invention relates to a process for the recovery of zinc from solutions containing organic substances, resulting from the manufacture of medicines for human and veterinary use.
Sunt cunoscute procedee de recupera- 5 rea zincului din soluții apoase, de diferite compoziții, prin tratare cu hidroxid sau carbonat de sodiu, pentru precipitarea cantitativă a zincului, sub formă de carbonat sau de hidroxid. Aceste procedee sunt limitate io însă la prelucrarea soluțiilor cu conținut de săruri anorganice, provenite din diverse faze ale metalurgiei extractive, în special.Processes for the recovery of zinc from aqueous solutions of different compositions by treatment with hydroxide or sodium carbonate are known for quantitative precipitation of zinc, in the form of carbonate or hydroxide. These processes are limited, however, to the processing of solutions containing inorganic salts, coming from various phases of extractive metallurgy, in particular.
Procedeul prezentat în invenție prevede recuperarea zincului din soluții cu următoarea 15 compoziție: substanțe organice: 20 ... 40% (în special azotat de 2-metil-imidazol), zinc 6 ... 20%, acid azotic 1,0 ... 3,0%. Sub această formă, soluțiile sus-menționate nu sunt utilizabile. 20The process presented in the invention provides for the recovery of zinc from solutions with the following composition: organic substances: 20 ... 40% (especially 2-methyl-imidazole nitrogen), zinc 6 ... 20%, 1,0 nitric acid. 3.0%. In this form, the above solutions are not usable. 20
In scopul refolosirii substanțelor din amestec, acestea se tratează cu soluții de hidroxid de sodiu de diferite concentrații (40 ... 70%), când zincul precipită sub forma unui complex, de preferință Ζη-2-medil-imidazol, 25 cu o solubilitate redusă. Complexul se separă din soluții, prin filtrare sau centrifugare, după care se poate refolosi în proces.In order to reuse the substances in the mixture, they are treated with sodium hydroxide solutions of different concentrations (40 ... 70%), when the zinc precipitates as a complex, preferably Ζη-2-medyl-imidazole, 25 with a solubility. reduced. The complex is separated from the solutions by filtration or centrifugation, after which it can be reused in the process.
Conform acestui procedeu, se recuperează peste 99% din zincul conținut în 30 soluție, concentrația zincului rezidual în soluție fiind sub 1 g/1.According to this procedure, over 99% of the zinc contained in 30 solutions is recovered, the residual zinc concentration in the solution being below 1 g / 1.
Procedeul conform invenției prezintă următoarele avantaje:The process according to the invention has the following advantages:
- recuperarea zincului, metal deficitar, din soluții reziduale;- zinc recovery, deficient metal, from residual solutions;
- randament de recuperare peste 99%;- recovery efficiency over 99%;
- produsul recuperat - complexul de zinc, se utilizează ca atare în procesul de 40 fabricație;- the recovered product - the zinc complex, is used as such in the process of 40 manufacture;
- nu necesită instalații și utilaje speciale;- does not require special equipment and machinery;
- costuri reduse de recuperare;- low recovery costs;
- elimină zincul din soluții reziduale, 45 până la circa 1 g/1;- removes zinc from residual solutions, 45 to about 1 g / 1;
- depoluarea apelor chimice impurificate cu zinc.- depolarization of chemical waters impurities with zinc.
Se dă, mai jos, un exemplu de realizare a invenției.An example of the invention is given below.
824,4 g soluție cu substanțe organice, provenită din fabricația de medicamente, care conține: 26,7% substanțe organice (de preferință azotat de 2-metil-imidazol), 10,4% zinc și 2,4% acid azotic, se tratează, sub agitare continuă cu 208,6 g soluție de hidroxid de sodiu de concentrație 64%. Reacția este exotermă, temperatura ajungând în vasul de reacție, la 55 °C; pH-ul masei obținute este 9,5. Durata reacției este de 60 min.824.4 g solution with organic substances, derived from the manufacture of medicinal products, containing: 26.7% organic substances (preferably 2-methyl-imidazole nitrogen), 10.4% zinc and 2.4% nitric acid, treats, under continuous stirring, with 208.6 g sodium hydroxide solution 64% concentration. The reaction is exothermic, with the temperature reaching the reaction vessel at 55 ° C; The pH of the obtained mass is 9.5. The reaction time is 60 min.
Din masa de reacție, se separă, prin filtrare, un precipitat galben-brun, care conține zincul sub formă de complex.From the reaction mass, a yellow-brown precipitate is separated by filtration, which contains zinc as a complex.
Rezultă 579,2 g turtă umedă, cu o umiditate de 31% care conține 20,92% zinc (raportat la produsul uscat) și 53,6% 2-metilimidazol. In soluția rămasă după filtrare, conținuturile de zinc și de substanță organică sunt mai mici de 0,1 %.The result is 579.2 g wet cake, with a humidity of 31% containing 20.92% zinc (compared to the dry product) and 53.6% 2-methylimidazole. In the solution remaining after filtration, the zinc and organic matter contents are less than 0.1%.
Zincul, astfel recuperat, se folosește în fabricație, cu un randament al reacției de bază de condensare substanțe cu ciclu imidazolic, de peste 90%.The zinc, thus recovered, is used in the manufacture, with a yield of the basic condensation reaction substances with imidazolic cycle, of more than 90%.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO147375A RO108002B1 (en) | 1991-04-18 | 1991-04-18 | Zinc recovery process from solutions with organic substances content |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO147375A RO108002B1 (en) | 1991-04-18 | 1991-04-18 | Zinc recovery process from solutions with organic substances content |
Publications (1)
Publication Number | Publication Date |
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RO108002B1 true RO108002B1 (en) | 1994-01-31 |
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ID=20128334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RO147375A RO108002B1 (en) | 1991-04-18 | 1991-04-18 | Zinc recovery process from solutions with organic substances content |
Country Status (1)
Country | Link |
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RO (1) | RO108002B1 (en) |
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1991
- 1991-04-18 RO RO147375A patent/RO108002B1/en unknown
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