CN104071759B - A kind of preparation method of sodium thiosulfate - Google Patents
A kind of preparation method of sodium thiosulfate Download PDFInfo
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- CN104071759B CN104071759B CN201410264681.2A CN201410264681A CN104071759B CN 104071759 B CN104071759 B CN 104071759B CN 201410264681 A CN201410264681 A CN 201410264681A CN 104071759 B CN104071759 B CN 104071759B
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- sodium thiosulfate
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Abstract
A kind of preparation method of sodium thiosulfate, relate to chemical technology field, choose qualified soda during preparation and add the mixing of water uniform stirring, add sulfur dioxide and react and obtain sodium sulfite solution, put in autoclave, it is stirred continuously, and it is heated, until solution boiling, adds sulfur, continue agitating heating 1.5h and obtain hot solution, be delivered in oxidizing reactor to control temperature in the kettle and be 70-80 DEG C and carry out oxidation reaction.Become yellow or white when reactant after, solution is inputted in evaporating kettle and be evaporated, activated carbon decolorizing, filter pressing, and cool down, crystallization, then pass through centrifuge sub-sieve and go out technical grade sodium thiosulfate and again put into and crystallization kettle carries out recrystallization obtain sodium thiosulfate finished product, packaging warehouse-in.The invention has the beneficial effects as follows: the present invention prepares convenient and simple, environment friendly and pollution-free, equipment investment is few, and purity is high, it is simple to operation, the sodium thiosulfate result of use of preparation is good, safe and reliable.
Description
Technical field
The present invention relates to chemical technology field, the preparation method being specifically related to a kind of sodium thiosulfate.
Background technology
Sodium thiosulfate, sodium thiosulfate, have another name called sodium hyposulfite, hypo, for monoclinic system white crystalline powder, soluble in water, insoluble in alcohol, it is mainly used in the manufacture of lead tetraethyl, dyestuff intermediate etc. and Ore carries the reducing agent of the Electroplating Operations such as silver, the water purification agent of purification project.For the antichlor after Bleaching of Cotton Fabrics in textile industry, the sulfur stain of dyeing wool fabric, the blush preventive agent of bipseudoindoxyl dye, paper pulp antichlor, medical industry is used as detergent, disinfectant and decolourant etc., analytical reagent is used for chromatographic analysis reagent, spot analysis measures cobalt, photograph fixative, antichlor volumetric analysis common agents, measure blood sodium, prepare injection and disaccharidase ferrum urea medium, mordant, sodium thiosulfate is also used as the antidote of cyanide, the preparation method of sodium thiosulfate is relatively single, traditional thiosulfuric acid process for producing sodium is complex, and the purity of production is relatively low, it is difficult to meet human wants.
Summary of the invention
The technical problem to be solved is in that to provide a kind of purity high, the preparation method of the simple sodium thiosulfate of preparation technology.
The technical problem to be solved realizes by the following technical solutions:
A kind of preparation method of sodium thiosulfate, it is characterised in that: comprise the following steps that,
A. choose qualified soda and add the mixing of water uniform stirring, add sulfur dioxide and react and obtain sodium sulfite solution；
B. sodium sulfite solution is put in autoclave, be stirred continuously, and be heated, until solution boiling；
C. add sulfur by internal for the solution of boiling, continue agitating heating 1.5h；
D. it is delivered to the hot solution reacting end in c in oxidizing reactor to control temperature in the kettle and is 70-80 DEG C and carries out oxidation reaction；
E. after becoming yellow or white when reactant, solution is inputted in evaporating kettle and be evaporated, activated carbon decolorizing；
F. the mixture after decolouring in e is carried out filter pressing, and cool down；
G. the mixture after cooling is delivered in crystallization kettle and carries out crystallization, then pass through centrifuge sub-sieve and go out technical grade sodium thiosulfate；
H. technical grade sodium thiosulfate is put into again and crystallization kettle carries out recrystallization obtain sodium thiosulfate finished product, packaging warehouse-in.
The waste residue being press-filtered out in described step f, is fed directly to fuel workshop and is used as fuel.
The invention has the beneficial effects as follows: the present invention prepares convenient and simple, environment friendly and pollution-free, equipment investment is few, and purity is high, it is simple to operation, the sodium thiosulfate result of use of preparation is good, safe and reliable.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with specific embodiment, the present invention is expanded on further.
The preparation method of a kind of sodium thiosulfate, comprises the following steps that,
A. choose qualified soda and add the mixing of water uniform stirring, add sulfur dioxide and react and obtain sodium sulfite solution；
B. sodium sulfite solution is put in autoclave, be stirred continuously, and be heated, until solution boiling；
C. add sulfur by internal for the solution of boiling, continue agitating heating 1.5h；
D. it is delivered to the hot solution reacting end in c in oxidizing reactor to control temperature in the kettle and is 70-80 DEG C and carries out oxidation reaction；
E. after becoming yellow or white when reactant, solution is inputted in evaporating kettle and be evaporated, activated carbon decolorizing；
F. the mixture after decolouring in e is carried out filter pressing, and cool down, the waste residue being press-filtered out, be fed directly to fuel workshop and be used as fuel；
G. the mixture after cooling is delivered in crystallization kettle and carries out crystallization, then pass through centrifuge sub-sieve and go out technical grade sodium thiosulfate；
H. technical grade sodium thiosulfate is put into again and crystallization kettle carries out recrystallization obtain sodium thiosulfate finished product, packaging warehouse-in.
Points for attention during technological operation
1, have a power failure: stopping heating, stop feeding in raw material, be necessary during stop off manually to move stirring by interval dish, but restart (being necessary need to first take out charge pipe, thermometer) after can suitably heating when again driving and moving with manpower dish；
2 yields are low: check each material content and actual inventory, check that whether drying time and analytical sampling be uniform etc..As all gone well, then have to check for each step response situation；
3, oxidizing temperature exceedes set point of temperature, and cooling water inflow is too little:
A. cooling water inflow is regulated；
B., when other measure is invalid, in pot, cold water forced cooling is added；
4, oxidizing temperature rises too fast, and chilled brine content is inadequate, regulates saline valve.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (2)
1. the preparation method of a sodium thiosulfate, it is characterised in that: comprise the following steps that,
A. choose qualified soda and add the mixing of water uniform stirring, add sulfur dioxide and react and obtain sodium sulfite solution；
B. sodium sulfite solution is put in autoclave, be stirred continuously, and be heated, until solution boiling；
C. add sulfur by internal for the solution of boiling, continue agitating heating 1.5h；
D. it is delivered to the hot solution reacting end in c in oxidizing reactor to control temperature in the kettle and is 70-80 DEG C and carries out oxidation reaction；
E. after becoming yellow or white when reactant, solution is inputted in evaporating kettle and be evaporated, activated carbon decolorizing；
F. the mixture after decolouring in e is carried out filter pressing, and cool down；
G. the mixture after cooling is delivered in crystallization kettle and carries out crystallization, then pass through centrifuge sub-sieve and go out technical grade sodium thiosulfate；
H. technical grade sodium thiosulfate is put into again and crystallization kettle carries out recrystallization obtain sodium thiosulfate finished product, packaging warehouse-in.
2. the preparation method of a kind of sodium thiosulfate according to claim 1, it is characterised in that: the waste residue being press-filtered out in described step f, it is fed directly to fuel workshop and is used as fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410264681.2A CN104071759B (en) | 2014-06-13 | 2014-06-13 | A kind of preparation method of sodium thiosulfate |
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| CN201410264681.2A CN104071759B (en) | 2014-06-13 | 2014-06-13 | A kind of preparation method of sodium thiosulfate |
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| CN104071759A CN104071759A (en) | 2014-10-01 |
| CN104071759B true CN104071759B (en) | 2016-07-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105776149A (en) * | 2016-03-19 | 2016-07-20 | 安徽东至广信农化有限公司 | Sodium thiosulfate crystallization mother liquor recycling technology |
| CN105668523A (en) * | 2016-03-19 | 2016-06-15 | 安徽东至广信农化有限公司 | Process for producing sodium thiosulfate |
| CN106379867A (en) * | 2016-10-21 | 2017-02-08 | 金川集团股份有限公司 | Method for producing sodium thiosulfate pentahydrate |
| CN111003692B (en) * | 2019-12-13 | 2020-09-08 | 南京工业大学 | Sulfur dioxide recycling system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654227A (en) * | 2008-08-23 | 2010-02-24 | 陈小毛 | Method for producing sodium thiosulfate |
| DK2451435T4 (en) * | 2009-07-08 | 2022-02-28 | Hope Medical Entpr Inc D B A Hope Pharmaceuticals | SODIUM THIOSULPHATE CONTAINING PHARMACEUTICAL COMPOSITIONS |
| CN101891159A (en) * | 2010-08-30 | 2010-11-24 | 天津市化学试剂研究所 | Preparation method of analytically pure sodium thiosulfate |
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