CN101337661B - Method for preparing sodium hydrosulfide - Google Patents
Method for preparing sodium hydrosulfide Download PDFInfo
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- CN101337661B CN101337661B CN2007100547920A CN200710054792A CN101337661B CN 101337661 B CN101337661 B CN 101337661B CN 2007100547920 A CN2007100547920 A CN 2007100547920A CN 200710054792 A CN200710054792 A CN 200710054792A CN 101337661 B CN101337661 B CN 101337661B
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- sodium hydrosulfide
- percent
- hydrogen sulfide
- sulfhydrate
- concentration
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Abstract
The invention discloses a method for preparing sodium hydrosulfide. The production process is as follows: introducing a mixed gas containing sulfureted hydrogen H2S with the content larger than 10 percent and carbon dioxide CO2 with the content not larger than 90 percent into lime cream of about 12 percent of concentration, under the condition of a certain temperature and pressure and under agitation; stopping reaction when CaS is less than or equal to 0.5 percent; separating sediments out to obtain a sulfur calcium hydroxide solution; introducing a mixed gas of sulfureted hydrogen and carbondioxide into a caustic soda solution with concentration larger than 30 percent under the condition of a certain temperature and pressure and under agitation; stopping reaction when Na2S is less than or equal to 0.5 percent to obtain a sodium hydrosulfide solution containing carbonate ions; and adding slightly not enough sodium hydrosulfide solution under agitation according to the amount of the carbonate ions in the sodium hydrosulfide solution, and separating sediments out to obtain sodium hydrosulfide with low carbonate ions.
Description
Technical field
The present invention relates to the preparation method of Sodium sulfhydrate, especially a kind of is the method for feedstock production Sodium sulfhydrate with hydrogen sulfide and carbon dioxide gas mixture, sodium hydroxide.
Background technology
The preparation method of Sodium sulfhydrate is the caustic soda absorption process at present, and it requires unstripped gas to be more purified hydrogen sulfide, mainly is to utilize the tail gas and the sodium hydroxide solution reaction of producing bariumchloride or nitrate of baryta to make Sodium sulfhydrate.Soda processes is produced Sodium sulfhydrate and is required in the unstripped gas not carbonated, if contain carbonic acid gas in the unstripped gas, just has yellow soda ash in process of production and generates: NaOH+CO
2→ Na
2CO
3+ H
2O, the generation of yellow soda ash not only reduces the yield of caustic soda, also influences the quality of Sodium sulfhydrate, influences user's use, and carbon dioxide content is greater than 10%, aborning also can occluding device and pipeline, production can not normally be carried out.
Summary of the invention
In order to overcome the deficiencies in the prior art, the purpose of this invention is to provide a kind of method for preparing Sodium sulfhydrate, it is solving under the carbonic acid gas interference, with caustic soda absorbing hydrogen sulphide waste gas, unstripped gas prepares Sodium sulfhydrate, can improve the quality of Sodium sulfhydrate product simultaneously significantly.
For achieving the above object, the present invention adopts following technical scheme:
The described method for preparing Sodium sulfhydrate, in its raw material of selecting for use, caustic soda soln concentration is greater than 30%, and hydrogen sulfide content is greater than 10% in hydrogen sulfide and the carbon dioxide gas mixture, and carbon dioxide content is not more than 90%; Its production technique:
In the milk of lime of concentration about 12%, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01Mpa, finish reaction at CaS≤0.5% o'clock, isolate sediment and obtain calcium sulfhydrate solution;
Concentration greater than 30% caustic soda soln in, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01Mpa, at Na
2S≤0.5% an o'clock end is reacted, and obtains containing the sodium hydrosulfide of carbonate; According to the amount of carbanion in the sodium hydrosulfide, stir adding above-mentioned calcium sulfhydrate solution slightly in shortage down, isolate the Sodium sulfhydrate product that sediment can obtain the low-carbon (LC) acid group.
The described method for preparing Sodium sulfhydrate, its amount that adds above-mentioned calcium sulfhydrate solution in sodium hydrosulfide is to require to exceed to carbonate content in the product.
The described method for preparing Sodium sulfhydrate, when containing calcium ion in to product and not requiring, it can be sneaked into milk of lime in caustic soda and absorb processing in the lump.
Relevant reaction equation:
NaOH+H
2S→NaHS+H
2O；
2NaOH+CO
2→Na
2CO
3+H
2O；
Ca(OH)
2+2H
2S→Ca(HS)
2+2H
2O；
Ca(OH)
2+CO
2→CaCO
3+H
2O。
Owing to adopted aforesaid technical scheme, the present invention has following superiority:
This prepares the method for Sodium sulfhydrate, and it is solving under the carbonic acid gas interference, utilizes caustic soda to absorb the tail gas of producing barium carbonate or Strontium carbonate powder, with the H in the tail gas
2S and CO
2Mixed gas is as unstripped gas, the preparation Sodium sulfhydrate, can improve simultaneously the utilization ratio of caustic soda and improve the quality of Sodium sulfhydrate product, produce the product that meets HG/T3687-2000 standard-required, and carbonate content that can the production customer requirement is lower than 0.2% Sodium sulfhydrate product.
Description of drawings
Fig. 1 prepares the process flow sheet of the method for Sodium sulfhydrate for the present invention.
Embodiment
Embodiment one
The present invention prepares the method for Sodium sulfhydrate, its concrete production technique:
In the milk of lime of concentration about 12%, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, wherein hydrogen sulfide content is greater than 10%, carbon dioxide content is not more than 90%, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01Mpa, finish reaction at CaS≤0.5% o'clock, isolate sediment CaCO
3Obtain calcium sulfhydrate solution;
Concentration greater than 30% caustic soda soln in, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, wherein hydrogen sulfide content is greater than 10%, carbon dioxide content is not more than 90%, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01Mpa, at Na
2S≤0.5% an o'clock end is reacted, and obtains containing the sodium hydrosulfide of carbonate; According to the amount of carbanion in the sodium hydrosulfide, stir adding above-mentioned calcium sulfhydrate solution slightly in shortage down, isolate sediment CaCO
3Can obtain the Sodium sulfhydrate product of low-carbon (LC) acid group.If the calcium sulfhydrate solution that adds is too much, then makes and contain calcium ion in the product.
Embodiment two
When the client was contained calcium ion in to product and do not required, the present invention prepared the method for Sodium sulfhydrate, its concrete production technique:
The milk of lime of concentration about 12% is sneaked into concentration greater than in 30% the caustic soda soln, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, wherein hydrogen sulfide content is greater than 10%, carbon dioxide content is not more than 90%, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01Mpa, at Na
2Sediment CaCO is isolated in S≤0.5% o'clock end reaction
3Obtain containing the Sodium sulfhydrate product of calcium ion.
Claims (1)
1. method for preparing Sodium sulfhydrate, it is characterized in that: in its raw material of selecting for use, caustic soda soln concentration is greater than 30%, and hydrogen sulfide content is greater than 10% in hydrogen sulfide and the carbon dioxide gas mixture, and carbon dioxide content is less than 90%; Its production technique:
In the milk of lime of concentration 12%, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01MPa, finish reaction at CaS≤0.5% o'clock, isolate sediment and obtain calcium sulfhydrate solution;
Concentration greater than 30% caustic soda soln in, stir to feed down and contain hydrogen sulfide H
2S and carbonic acid gas CO
2Mixed gas, 50～80 ℃ of controlled temperature, pressure-0.05～-0.01MPa, at Na
2S≤0.5% an o'clock end is reacted, and obtains containing the sodium hydrosulfide of carbonate; According to the amount of carbanion in the sodium hydrosulfide, stir adding above-mentioned calcium sulfhydrate solution slightly in shortage down, isolate the Sodium sulfhydrate product that sediment can obtain the low-carbon (LC) acid group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100547920A CN101337661B (en) | 2007-07-04 | 2007-07-04 | Method for preparing sodium hydrosulfide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100547920A CN101337661B (en) | 2007-07-04 | 2007-07-04 | Method for preparing sodium hydrosulfide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101337661A CN101337661A (en) | 2009-01-07 |
| CN101337661B true CN101337661B (en) | 2010-11-03 |
Family
ID=40211855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100547920A Expired - Fee Related CN101337661B (en) | 2007-07-04 | 2007-07-04 | Method for preparing sodium hydrosulfide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101337661B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382698A (en) * | 2011-04-29 | 2012-03-21 | 王嘉兴 | Method for producing calcium carbonate during marsh gas purification |
| CN103130195B (en) * | 2013-03-11 | 2015-01-07 | 黄河三角洲京博化工研究院有限公司 | Method for producing sodium sulfhydrate from thiocarbamide waste residue and finery plant acidic gas |
| CN103721531B (en) * | 2013-09-30 | 2016-06-29 | 宁夏宝塔石化科技实业发展有限公司 | Film absorption process and the device of NaHS is produced for sour gas |
| CN103693626B (en) * | 2013-12-18 | 2016-02-03 | 安徽工业大学 | A kind ofly carbonated hydrogen sulfide acid gas is utilized to prepare the method for Sodium sulfhydrate |
| CN104971601B (en) * | 2014-04-10 | 2017-04-12 | 中国石油化工股份有限公司 | Acid gas vertical reactor and processing method |
| CN105854570A (en) * | 2016-06-16 | 2016-08-17 | 重庆天原化工有限公司 | New mercaptopropionic-acid tail gas treating technology |
| CN108918322A (en) * | 2018-07-23 | 2018-11-30 | 贵州红星发展股份有限公司 | The detection method of impurity sodium salt in a kind of NaHS product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4439411A (en) * | 1981-01-22 | 1984-03-27 | Fmc Corporation | Production of sodium hydrosulfide |
| CN1109020A (en) * | 1994-12-12 | 1995-09-27 | 余仲明 | One step process for producing sodium thiohydride |
| CN1295971A (en) * | 2000-11-21 | 2001-05-23 | 兀吉康 | Novel process for producing sodium hydrosulfide by utilizing by-products in production of barium salt |
-
2007
- 2007-07-04 CN CN2007100547920A patent/CN101337661B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4439411A (en) * | 1981-01-22 | 1984-03-27 | Fmc Corporation | Production of sodium hydrosulfide |
| CN1109020A (en) * | 1994-12-12 | 1995-09-27 | 余仲明 | One step process for producing sodium thiohydride |
| CN1295971A (en) * | 2000-11-21 | 2001-05-23 | 兀吉康 | Novel process for producing sodium hydrosulfide by utilizing by-products in production of barium salt |
Non-Patent Citations (1)
| Title |
|---|
| JP昭59-26902A 1984.02.13 |
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| Publication number | Publication date |
|---|---|
| CN101337661A (en) | 2009-01-07 |
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Granted publication date: 20101103 Termination date: 20110704 |