CN106809807A - A kind of preparation method of sodium thiosulfate - Google Patents
A kind of preparation method of sodium thiosulfate Download PDFInfo
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- CN106809807A CN106809807A CN201611078438.7A CN201611078438A CN106809807A CN 106809807 A CN106809807 A CN 106809807A CN 201611078438 A CN201611078438 A CN 201611078438A CN 106809807 A CN106809807 A CN 106809807A
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- preparation
- sodium thiosulfate
- sodium
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- heating
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/64—Thiosulfates; Dithionites; Polythionates
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides a kind of preparation method of sodium thiosulfate, including sodium sulfite, the preparation of NaOH mixed solution, heating, stirring to hypo solution, while hot filtering, steam bath heating evaporation, cooling, filtration under diminished pressure, crystallizes.The present invention is the mixed solution for generating molar concentration with sulfur dioxide gas precursor reactant for the sodium hydroxide solution of 1mol/L, again by reacted mixed solution in PH=11, temperature mixes to carry out heating with Cosan under conditions of 101 degrees Celsius, active carbon powder is added after 27min, is stirred, filtered while hot, heating evaporation in stream of nitrogen gas, cooling, crystallization, drying.
Description
Technical field
The invention belongs to chemical field, more particularly to a kind of preparation method of sodium thiosulfate.
Background technology
It is usually after sodium sulfite solution is inhaled into sulphur, to decolourize to prepare sodium thiosulfate, condensing crystallizing, but such technique
General conversion ratio is not high, and Production Time is long.
The content of the invention
In order to overcome above-mentioned preparation process produced problem, the present invention provides a kind of preparation method of sodium thiosulfate, bag
Include sodium sulfite, the preparation of NaOH mixed solution, while hot heating, stirring to hypo solution, filtering, nitrogen gas
Heating evaporation, cooling, filtration under diminished pressure in stream, crystallization.
Further, in the preparation method of the sodium thiosulfate, when 0.05mol sulfur dioxide gas are passed through, gas leads to
Entrance should reach the bottom of the sodium hydroxide solution container equipped with 100mL1mol/L.
Further, in the preparation method of described sodium thiosulfate, in PH=11, temperature is 101 degrees Celsius of condition
Under, the Cosan be with the Cosan of ethanol wet, the amount of added Cosan should according to the 110% of chemical reaction metering ratio,
1.76g Cosans are added in this experiment carries out the heating stirring of 27min.
Preferably, in the preparation method of described sodium thiosulfate, the pH value required for experiment condition, by 1.5mol/L's
Sodium hydroxide solution is adjusted with the sulfuric acid solution of 1mol/L.
Preferably, in the preparation method of described sodium thiosulfate, hypo solution filter method must be while hot
Filtering.
Further, in the preparation method of described sodium thiosulfate, remaining filter after hypo solution filtering
Slag must be cleaned 4 times with distilled water, and it is medium to be heated that the cleaning fluid after cleaning pours into filtrate.
Preferably, in the preparation method of described sodium thiosulfate, the filtrate after filtering is carried out in the air-flow of nitrogen
Heating evaporation, until evaporating dish crystal appearing above, stopping heating carrying out crystallisation by cooling.
The present invention provides a kind of preparation method of sodium thiosulfate, including sodium sulfite, the system of NaOH mixed solution
Standby, heating evaporation, cooling, filtration under diminished pressure in heating, stirring to hypo solution, while hot filtering, stream of nitrogen gas are tied
It is brilliant.The present invention is for the close sodium hydroxide solution 100mL of 1mol/L is generated with 0.05mol sulfur dioxide gases precursor reactant by molar concentration
Mixed solution, then by reacted mixed solution in PH=11, temperature is to be added with Cosan under conditions of 101 degrees Celsius
Hot mixing, adds 0.15g active carbon powders after 27min, stirring is filtered, heating evaporation in stream of nitrogen gas, cooled down while hot, crystallization,
Drying, the sodium thiosulfate purity of preparation is high, and simple for production, required expense is low.
Specific embodiment
With reference to case study on implementation, the present invention is described further.
Case study on implementation 1
The present invention prepares sodium thiosulfate and comprises the following steps：
1st, sodium sulfite and NaOH mixed solution are prepared：
0.05mol sulfur dioxide gas are passed through in the sodium hydroxide solution of 100mL1mol/L,
Chemical equation is：2Na2OH+SO2=Na2SO3+H2O
Gas access must reach the bottom of container, allow gas to be fully contacted with solution.
2nd, hypo solution is prepared：
The solution of step one gained is added the Cosan of 1.76g ethanol wets, in PH=11, temperature is 101 degrees Celsius of bar
Under part, heating stirring is carried out,
Reaction equation is：Na2SO3+S=Na2S2O3
It is to prevent Cosan to be oxidized that the Cosan for being added is needed with ethanol wet, and addition is 1.76g because theoretical amount
Be 1.6g, the actual amount for being added have to be larger than theoretical amount, the available sodium hydroxide solution by 1.5mol/L of regulation PH numerical value with
The sulfuric acid solution of 1mol/L, sodium thiosulfate could exist in the basic conditions, so needing to adjust the PH numerical value of solution, heating
Stop heating and stirring etc. when being boiled to similar 27min to be filtered.
3rd, hypo solution is filtered
While hot by etc. suspension to be filtered pour into filter and filtered, obtain hypo solution and filter residue, use
The filter residue of gained is carried out 4 washings by distilled water, and cleaning solution is poured into filtrate.
4th, thiosulfuric acid sodium crystal is prepared
By step 3 gained liquid heating evaporation in stream of nitrogen gas, until beginning with crystal precipitation, cooling, filtering obtain sulphur
Sodium thiosulfate crystal, its chemical formula is Na2S2O35H2O
5th, sodium thiosulfate solid is prepared
The crystal of gained is placed in baking oven in 40 ~ 50 degrees Celsius of drying, sodium thiosulfate solid is obtained.
The present invention provides a kind of preparation method of sodium thiosulfate, including sodium sulfite, the system of NaOH mixed solution
Standby, heating evaporation, cooling, filtration under diminished pressure in heating, stirring to hypo solution, while hot filtering, stream of nitrogen gas are tied
It is brilliant.The present invention is for the close sodium hydroxide solution 100mL of 1mol/L is generated with 0.05mol sulfur dioxide gases precursor reactant by molar concentration
Mixed solution, then by reacted mixed solution in PH=11, temperature is to be added with Cosan under conditions of 101 degrees Celsius
Hot mixing, adds 0.15g active carbon powders, stirring, into heat filtering, steam bath heating evaporation, cooling, crystallization, baking after 27min
Dry, the sodium thiosulfate purity of preparation is high, simple for production, and required expense is low.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and implementation method
Utilization, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easy
Realize other modification, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not
It is limited to specific details and shown here as the case study on implementation with description.
Claims (9)
1. a kind of preparation method of sodium thiosulfate, including sodium sulfite, the preparation of NaOH mixed solution, to thiosulfuric acid
The heating of sodium solution, while hot stirring, heating evaporation, cooling, filtration under diminished pressure in filtering, stream of nitrogen gas, crystallize, it is characterised in that：
It is sodium hydroxide solution and the sulfur dioxide gas of 1mol/L according to stoichiometric proportion 2 to molar concentration:1 hybrid reaction is given birth to
Into mixed solution, then carry out heating with sofril and mix, active carbon powder is added after 27min, stir, filtering, heating evaporation,
Cooling, crystallization, drying.
2. the preparation method of sodium thiosulfate according to claim 1, it is characterised in that：When sulfur dioxide gas are passed through
Gas is passed through mouth and should reach sodium hydroxide solution bottom.
3. the preparation method of sodium thiosulfate according to claim 1, it is characterised in that：In PH=11, temperature is taken the photograph for 101
Under conditions of family name's degree, the mixed solution of NaOH and sodium sulfite is added into Cosan, carry out the heating stirring of 27min.
4. the preparation method of sodium thiosulfate according to claim 3, it is characterised in that：The Cosan is to be moistened with ethanol
Wet Cosan, the amount of added Cosan is 1 with the amount mol ratio of NaOH:2, the Cosan being actually added into should be according to change
Learn the 110% of stoichiometry.
5. the preparation method of sodium thiosulfate according to claim 1, it is characterised in that：PH required for experiment condition
Value, is adjusted by the sodium hydroxide solution of 1.5mol/L with the sulfuric acid solution of 1mol/L.
6. the preparation method of sodium thiosulfate according to claim 1, it is characterised in that：When hypo solution is filtered
Must filter while hot.
7. the preparation method of the sodium thiosulfate according to claim 1 or 6, it is characterised in that：Hypo solution mistake
The filter residue of filter need to be cleaned 4 times with distilled water, and cleaning fluid is poured into filtrate.
8. the preparation method of the sodium thiosulfate according to claim 1 or 3 or 4 or 6, it is characterised in that：In the gas of nitrogen
The filtrate after filtering is carried out into heating evaporation in stream.
9. the preparation method of the sodium thiosulfate according to claim 1 or 3 or 4 or 6, it is characterised in that：The crystal for obtaining
It is five water thiosulfuric acid sodium crystals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611078438.7A CN106809807A (en) | 2016-11-30 | 2016-11-30 | A kind of preparation method of sodium thiosulfate |
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| CN201611078438.7A CN106809807A (en) | 2016-11-30 | 2016-11-30 | A kind of preparation method of sodium thiosulfate |
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| CN201611078438.7A Pending CN106809807A (en) | 2016-11-30 | 2016-11-30 | A kind of preparation method of sodium thiosulfate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253702A (en) * | 2017-07-17 | 2017-10-17 | 湖南大学 | A kind of method that sour gas body prepares sodium thiosulfate |
| CN110577841A (en) * | 2019-10-08 | 2019-12-17 | 磁悬浮润滑油(苏州)有限公司 | Method for removing chloride in oil product by using sodium thiosulfate |
| WO2021114561A1 (en) * | 2019-12-13 | 2021-06-17 | 南京杰科丰环保技术装备研究院有限公司 | System and method for resource recycling of sulfur dioxide |
| CN116062708A (en) * | 2022-12-02 | 2023-05-05 | 东南大学 | Synthetic method of sodium thiosulfate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489132A (en) * | 2011-11-23 | 2012-06-13 | 武汉兴能环保技术有限公司 | Novel dual-alkali desulfurization method for removal of sulfur dioxide from flue gas and generation of elemental sulfur as byproduct |
| CN105523525A (en) * | 2014-10-23 | 2016-04-27 | 汪杰 | Sodium hyposulfite preparation method |
| CN106115633A (en) * | 2016-06-28 | 2016-11-16 | 湖北博凯医药科技有限公司 | A kind of method utilizing thionyl chloride tail gas of acyl chlorination synthesis sodium thiosulfate |
-
2016
- 2016-11-30 CN CN201611078438.7A patent/CN106809807A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489132A (en) * | 2011-11-23 | 2012-06-13 | 武汉兴能环保技术有限公司 | Novel dual-alkali desulfurization method for removal of sulfur dioxide from flue gas and generation of elemental sulfur as byproduct |
| CN105523525A (en) * | 2014-10-23 | 2016-04-27 | 汪杰 | Sodium hyposulfite preparation method |
| CN106115633A (en) * | 2016-06-28 | 2016-11-16 | 湖北博凯医药科技有限公司 | A kind of method utilizing thionyl chloride tail gas of acyl chlorination synthesis sodium thiosulfate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253702A (en) * | 2017-07-17 | 2017-10-17 | 湖南大学 | A kind of method that sour gas body prepares sodium thiosulfate |
| CN110577841A (en) * | 2019-10-08 | 2019-12-17 | 磁悬浮润滑油(苏州)有限公司 | Method for removing chloride in oil product by using sodium thiosulfate |
| WO2021114561A1 (en) * | 2019-12-13 | 2021-06-17 | 南京杰科丰环保技术装备研究院有限公司 | System and method for resource recycling of sulfur dioxide |
| US11731874B2 (en) | 2019-12-13 | 2023-08-22 | Nanjing Gekof Institute Of Environmental Protection Technology & Equipment Co., Ltd. | System and method for resource recycling of sulfur dioxide |
| CN116062708A (en) * | 2022-12-02 | 2023-05-05 | 东南大学 | Synthetic method of sodium thiosulfate |
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