CN101003366A - Method for producing hydros by using epoxy compound as auxiliary agent - Google Patents
Method for producing hydros by using epoxy compound as auxiliary agent Download PDFInfo
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- CN101003366A CN101003366A CN 200610150002 CN200610150002A CN101003366A CN 101003366 A CN101003366 A CN 101003366A CN 200610150002 CN200610150002 CN 200610150002 CN 200610150002 A CN200610150002 A CN 200610150002A CN 101003366 A CN101003366 A CN 101003366A
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Abstract
This invention relates to a method for producing sodium hydrosulfite by using epoxide compound as auxiliary. The method solves the problems of large difficulty in inhibiting side reactions, poor product stability, low yield and high raw material consumption faced by background techniques. In this invention, when the content of Na2S2O3 in the materials in the synthesis pot is greater than or equal to 5 g/L, epoxide compound is added so that the content of Na2S2O3 is less than or equal to 5 g/L. Sodium hydrosulfite produced in this invention has such advantages as inhibited side reactions, high synthesis rate.
Description
Technical field: the present invention relates to produce the method for vat powder, particularly a kind of method of producing vat powder with epoxy compound as auxiliary agent.
Background technology: at present, produce the method for vat powder, conditions such as the pH value of reaction solution and pressure, temperature are produced vat powder in the synthetic pot of major control.This method exists that side reaction is difficult to suppress, product stability is poor, synthesis yield is low, the shortcomings such as raw materials consumption height.The sodium thiosulfate Na that generates of side reaction particularly
2S
2O
3, increased consumption of raw materials, cause above problem to take place.What therefore effectively suppress side reaction is to produce sodium hydrosulfite method institute problem demanding prompt solution.
Summary of the invention: the objective of the invention is to propose a kind of method of producing vat powder with epoxy compound as auxiliary agent, the solution background technology exists: side reaction is difficult to suppress, product stability is poor, synthesis yield is low, shortcomings such as raw materials consumption height.Solving the technical scheme that above technical problem adopts is: 1, a kind of method of producing sodium hydrosulfite with epoxy compound as auxiliary agent, (1) synthetic bed material preparation: under normal temperature, normal pressure, material (to call the ingredients pot material in the following text No. 1) with refined methanol or synthesis mother liquid, sodium formate and fresh water (FW) preparation adds 1000～1500L in synthetic pot, start synthetic pot and stir, pass into steam to synthetic pot chuck then and slowly heat up; (2) in and tone pitch: when synthetic kettle temperature rises to 75 ℃～80 ℃, the synthetic pot inner pressure 0.05～0.30MPa of control, the acidificated material (to call the ingredients pot material in the following text No. 2) that adds refined methanol or washing methyl alcohol, sodium pyrosulfite or sodium carbonate, sulfur dioxide liquid preparation in the synthetic pot is regulated in the synthetic pot material pH value 4.2～4.6 and o'clock is ended; (3) the big dropping: behind the tone pitch, when synthetic kettle temperature rose to 80～85 ℃, beginning is dropping greatly, namely simultaneously leftover materials in No. 1, No. 2 ingredients pots was evenly added in 50min～90min; (4) little dropping: drip greatly rear a synthetic pot material suitably is incubated 5～15min after, begin little dropping, namely add equably sulfur dioxide liquid with 100～180min thread shape, until from synthetic material during Sodium Hydrosulfite Content 〉=88.5% synthetic droplet add end; (5) insulation: when synthetic reach terminal point after, insulation 30min～90min, 80～84 ℃ of the synthetic pot inner pressure 0.10～0.25MPa of insulating process control, temperature, insulation terminal point PH 〉=4.9; (6) cooling blowing: be incubated complete, opening clamp jacket water valve, synthetic pot inner pressure≤the 0.1MPa of control, 60～70 ℃ of temperature, pH value 〉=4.9 will be synthesized then in the pot material and be put into four unification driers and carry out press filtration, washing, drying, cooling, blending, blowing, packing and make qualified sodium hydrosulfite product; It is characterized in that in the above process Na in the synthetic pot of sample analysis material
2S
2O
3During 〉=5g/L, end when adding epoxide to Na2S203≤5g/L.The epoxy compounds of adding is oxyethane or propylene oxide.
The beneficial effect that the present invention and background technology comparison have is: owing to add epoxy compound as auxiliary agent on the methodological science ground that produces sodium hydrosulfite, play the generation that suppresses side reaction in synthetic sodium hydrosulfite process, reduced accessory substance Na
2S
2O
3Generation, therefore improved product stability, increased synthesis yield, reduced raw materials consumption.
Embodiment:
Embodiment 1, a kind of method of producing sodium hydrosulfite with epoxy compound as auxiliary agent, (1) synthetic bed material preparation: under normal temperature, normal pressure, material (to call the ingredients pot material in the following text No. 1) with refined methanol or synthesis mother liquid, sodium formate and fresh water (FW) preparation adds 1000～1500L in synthetic pot, start synthetic pot and stir, pass into steam to synthetic pot chuck then and slowly heat up; (2) in and tone pitch: when synthetic kettle temperature rises to 75 ℃～80 ℃, the synthetic pot inner pressure 0.05～0.30MPa of control, the acidificated material (to call the ingredients pot material in the following text No. 2) that adds refined methanol or washing methyl alcohol, sodium pyrosulfite or sodium carbonate, sulfur dioxide liquid preparation in the synthetic pot is regulated in the synthetic pot material pH value 4.2～4.6 and o'clock is ended; (3) the big dropping: behind the tone pitch, when synthetic kettle temperature rose to 80～85 ℃, beginning is dropping greatly, namely simultaneously leftover materials in No. 1, No. 2 ingredients pots was evenly added in 50min～90min; (4) little dropping: drip greatly rear a synthetic pot material suitably is incubated 5～15min after, begin little dropping, namely add equably sulfur dioxide liquid with 100～180min thread shape, until from synthetic material during Sodium Hydrosulfite Content 〉=88.5% synthetic droplet add end; (5) insulation: when synthetic reach terminal point after, insulation 30min～90min, 80～84 ℃ of the synthetic pot inner pressure 0.10～0.25MPa of insulating process control, temperature, insulation terminal point PH 〉=4.9; (6) cooling blowing: be incubated complete, open chuck condensed water valve, synthetic pot inner pressure≤the 0.1MPa of control, 60～70 ℃ of temperature, pH value 〉=4.9 will be synthesized then in the pot material and be put into four unification driers and carry out press filtration, washing, drying, cooling, blending, blowing, packing and make qualified sodium hydrosulfite product; It is characterized in that in the above process Na in the synthetic pot of sample analysis material
2S
2O
3During 〉=5g/L, add oxirane to Na
2S
2O
3End during≤5g/L.
Embodiment 2, except that epoxy compounds is propylene oxide, all the other are identical with embodiment 1.
Claims (3)
1, a kind of method of producing sodium hydrosulfite with epoxy compound as auxiliary agent, (1) synthetic bed material preparation: under normal temperature, normal pressure, material (to call the ingredients pot material in the following text No. 1) with refined methanol or synthesis mother liquid, sodium formate and fresh water (FW) preparation adds 1000～1500L in synthetic pot, start synthetic pot and stir, pass into steam to synthetic pot chuck then and slowly heat up; (2) in and tone pitch: when synthetic kettle temperature rises to 75 ℃～80 ℃, the synthetic pot inner pressure 0.05～0.30MPa of control, the good material (to call the ingredients pot material in the following text No. 2) of caproic acidization that adds refined methanol or washing methyl alcohol, sodium pyrosulfite or sodium carbonate, sulfur dioxide liquid preparation in the synthetic pot is regulated in the synthetic pot material pH value 4.2～4.6 and o'clock is ended; (3) the big dropping: behind the tone pitch, when synthetic kettle temperature rose to 80～85 ℃, beginning is dropping greatly, namely simultaneously leftover materials in No. 1, No. 2 ingredients pots was evenly added in 50min～90min; (4) little dropping: drip greatly rear a synthetic pot material suitably is incubated 5～15min after, begin little dropping, namely add equably sulfur dioxide liquid with 100～180min thread shape, until from synthetic material during Sodium Hydrosulfite Content 〉=88.5% synthetic droplet add end; (5) insulation: when synthetic reach terminal point after, insulation 30min～90min, 80～84 ℃ of the synthetic pot inner pressure 0.10～0.25MPa of insulating process control, temperature, insulation terminal point PH 〉=4.9; (6) cooling blowing: be incubated complete, opening clamp jacket water valve, synthetic pot inner pressure≤the 0.1MPa of control, 60～70 ℃ of temperature, pH value 〉=4.9 will be synthesized then in the pot material and be put into four unification driers and carry out press filtration, washing, drying, cooling, blending, blowing, packing and make qualified sodium hydrosulfite product; It is characterized in that in the above process Na in the synthetic pot of sample analysis material
2S
2O
3During 〉=5g/L, add epoxide to Na
2S
2O
3End during≤5g/L.
2, according to the described a kind of method of producing vat powder of claim 1, it is characterized in that the epoxy compounds of adding is an oxyethane with epoxy compound as auxiliary agent.
3, according to the described a kind of method of producing vat powder of claim 1, it is characterized in that the epoxy compounds of adding is a propylene oxide with epoxy compound as auxiliary agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610150002 CN101003366A (en) | 2006-10-24 | 2006-10-24 | Method for producing hydros by using epoxy compound as auxiliary agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610150002 CN101003366A (en) | 2006-10-24 | 2006-10-24 | Method for producing hydros by using epoxy compound as auxiliary agent |
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| Publication Number | Publication Date |
|---|---|
| CN101003366A true CN101003366A (en) | 2007-07-25 |
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|---|---|---|---|
| CN 200610150002 Pending CN101003366A (en) | 2006-10-24 | 2006-10-24 | Method for producing hydros by using epoxy compound as auxiliary agent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530883A (en) * | 2011-12-14 | 2012-07-04 | 烟台金海化工有限公司 | Method for synthetizing sodium hydrosulfite |
| CN102556980A (en) * | 2011-12-14 | 2012-07-11 | 烟台金海化工有限公司 | Method for synthesizing sodium dithionite |
| CN102674266A (en) * | 2012-05-23 | 2012-09-19 | 江苏省东泰精细化工有限责任公司 | Drying method of zinc dust process based sodium hydrosulfite |
| CN103552991A (en) * | 2013-10-23 | 2014-02-05 | 中盐安徽红四方股份有限公司 | Novel continuous large dropwise adding technological method in sodium hydrosulfite production |
| CN104341328A (en) * | 2014-10-16 | 2015-02-11 | 烟台市金河保险粉厂有限公司 | Method for producing ethanethiol by utilizing distilled crude methanol residue liquid in production process of sodium hydrosulfite |
| CN106517103A (en) * | 2016-12-14 | 2017-03-22 | 赤峰瑞阳化工有限公司 | Sodium hydrosulfite synthesizing and continuous producing method |
-
2006
- 2006-10-24 CN CN 200610150002 patent/CN101003366A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530883A (en) * | 2011-12-14 | 2012-07-04 | 烟台金海化工有限公司 | Method for synthetizing sodium hydrosulfite |
| CN102556980A (en) * | 2011-12-14 | 2012-07-11 | 烟台金海化工有限公司 | Method for synthesizing sodium dithionite |
| CN102530883B (en) * | 2011-12-14 | 2013-10-23 | 烟台市金河保险粉厂有限公司 | Method for synthetizing sodium hydrosulfite |
| CN102674266A (en) * | 2012-05-23 | 2012-09-19 | 江苏省东泰精细化工有限责任公司 | Drying method of zinc dust process based sodium hydrosulfite |
| CN103552991A (en) * | 2013-10-23 | 2014-02-05 | 中盐安徽红四方股份有限公司 | Novel continuous large dropwise adding technological method in sodium hydrosulfite production |
| CN104341328A (en) * | 2014-10-16 | 2015-02-11 | 烟台市金河保险粉厂有限公司 | Method for producing ethanethiol by utilizing distilled crude methanol residue liquid in production process of sodium hydrosulfite |
| CN106517103A (en) * | 2016-12-14 | 2017-03-22 | 赤峰瑞阳化工有限公司 | Sodium hydrosulfite synthesizing and continuous producing method |
| CN106517103B (en) * | 2016-12-14 | 2018-07-27 | 赤峰瑞阳化工有限公司 | Sodium hydrosulfite synthesizes continuous production method |
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Open date: 20070725 |