CN1031360A - From thioxine dyes waste water, reclaim sodium thiosulfate - Google Patents
From thioxine dyes waste water, reclaim sodium thiosulfate Download PDFInfo
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- CN1031360A CN1031360A CN 87105475 CN87105475A CN1031360A CN 1031360 A CN1031360 A CN 1031360A CN 87105475 CN87105475 CN 87105475 CN 87105475 A CN87105475 A CN 87105475A CN 1031360 A CN1031360 A CN 1031360A
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- sodium thiosulfate
- waste water
- thioxine dyes
- crystal
- reclaim
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
From the thioxine dyes factory effluent that contains sodium thiosulfate, reclaim the technology of sodium thiosulfate, the thioxine dyes waste water that will contain sodium thiosulfate is through precipitation, evaporation concentration, filter cleaner add little crystal grain sodium thiosulfate crystal seed then, being allowed to condition at 46.5～47.5 ℃ of proportions is thermostatical crystallization under 55～56 ° of Be states, use a small amount of hot water to crystal drip washing impurity again, drying gets final product.
Description
From produce thioxine dyes waste water, reclaim sodium thiosulfate technology and belong to chemical industry class technology.Sodium thiosulfate has another name called hypo, and formal name used at school is in Sulfothiorine.Molecular formula Na
2S
2O
35H
2O.General reductive agent, dechlorinating agent as the fixing salt of taking pictures, chemical industry such as electroplate, purify waste water also are the important source material of producing agricultural chemicals.The industrial synthesis method of taking is produced sodium thiosulfate, and the waste water of production thioxine dyes discards usually, and the technology that therefrom reclaims sodium thiosulfate yet there are no report.
Task of the present invention is to provide a kind of technology that reclaims sodium thiosulfate from the thioxine dyes waste water that contains sodium thiosulfate.
Task of the present invention is finished by following technical process.
The thioxine dyes waste water that will contain sodium thiosulfate is through precipitation, and clarifying precipitated liquid evaporation concentration, filter cleaner adds little crystal grain sodium thiosulfate crystal seed then, is allowed to condition at crystallization under the temperature constant state, crystal drip washing is dried to get final product at last.This process equipment manipulation is simple, and whole process does not have chemical reaction substantially, is raw material with waste water, the economic worth height.
Below in conjunction with most preferred embodiment technical process is described in further detail.
The thioxine dyes waste water that will contain sodium thiosulfate precipitates more than eight hours in settling tank at least to be squeezed into precipitated liquid in the concentrating pan with submerged pump.Adopt steam indirect heating method evaporation concentration, kettle temperature is controlled at 100-120 ℃ and keeps boiling state, stirs with paddle agitator, rotating speed is grasped at 80-85 rev/min, in the process of evaporation concentration, look liquid level decline situation and carry out feed supplement, to keep certain generating surface.Concentrate and carry out in two steps, when the proportion of concentrated solution reaches 38-40 ° of Be for the first time, stop heating, kept ten minutes, filtered while hot, its filter residue discards or reclaims sodium-chlor and sodium sulfate; Filtrate is sent into and is carried out secondary concentration in another concentrating pan, and working method is with concentrated identical for the first time.When liquid specific gravity reaches 56-57 ° of Be, stop heating, carry out secondary filtration while hot, filter residue discard or and in the first time filter residue reclaim sodium-chlor, sodium sulfate etc.To prepare crystallization in the final concentrated filtrate input crystallizing pan.Crystallization is an exothermic process, needs with cold water the crystal solution cooling that circulates when crystal solution is cooled to 47-48 ℃, is descended crystal seed immediately, and maintained thermostatical crystallization under the 46.5-47.5 ℃ of state.Stir rotating speed 18-20 rev/min with the fan-shaped agitator of monolithic simultaneously.The crystallization back that finishes adds a small amount of 40-45 ℃ hot water and cleans the plane of crystal foreign material, filters then to dry, and filtrate can be made circulating mother liquor and repeatedly concentrate and use.With the crystal vibratory screening that dries, big crystal grain as finished product, little crystal grain as crystallization the time crystal used, the particulate foam can be put into the secondary concentration pot through dissolving and concentrate once more, filters post crystallization, whole technological operation finishes.
Claims (2)
1, utilize the technology of the waste water reclamation sodium thiosulfate in the thioxine dyes production, with the waste water evaporation concentration of post precipitation, the filter cleaner crystallization is characterized in that:
A, concentrate slagging-off and divide two ones and carries out, for the second time striking point proportion in 54～58 ° of Be scopes, and best with 56～57 ° of Be effects.
The temperature of crystal solution is in 46～48C scope when B, adding crystal seed.
C, Tc maintain under 46.5～47.5 ℃ of temperature constant states.
2, invention as claimed in claim 1 is characterized in that stirring velocity in the crystallisation process is 18～20 rev/mins and is advisable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105475 CN1031360A (en) | 1987-08-08 | 1987-08-08 | From thioxine dyes waste water, reclaim sodium thiosulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105475 CN1031360A (en) | 1987-08-08 | 1987-08-08 | From thioxine dyes waste water, reclaim sodium thiosulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1031360A true CN1031360A (en) | 1989-03-01 |
Family
ID=4815335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105475 Pending CN1031360A (en) | 1987-08-08 | 1987-08-08 | From thioxine dyes waste water, reclaim sodium thiosulfate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031360A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085190C (en) * | 1999-09-16 | 2002-05-22 | 海门市江滨化工二厂 | Cyctic utilization of waste water in the course of production of sodium thiosulfate |
| CN1098805C (en) * | 1999-09-16 | 2003-01-15 | 海门市江滨化工二厂 | Improvement of production method of sodium thiosulfate |
| CN101264993B (en) * | 2008-04-21 | 2011-04-20 | 金顺玉 | Sulphur black dyestuff waste liquid decolor waste slag treatment method |
| CN107129091A (en) * | 2017-05-27 | 2017-09-05 | 芜湖富春染织股份有限公司 | A kind of scribbled dyeing waste processing method |
-
1987
- 1987-08-08 CN CN 87105475 patent/CN1031360A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085190C (en) * | 1999-09-16 | 2002-05-22 | 海门市江滨化工二厂 | Cyctic utilization of waste water in the course of production of sodium thiosulfate |
| CN1098805C (en) * | 1999-09-16 | 2003-01-15 | 海门市江滨化工二厂 | Improvement of production method of sodium thiosulfate |
| CN101264993B (en) * | 2008-04-21 | 2011-04-20 | 金顺玉 | Sulphur black dyestuff waste liquid decolor waste slag treatment method |
| CN107129091A (en) * | 2017-05-27 | 2017-09-05 | 芜湖富春染织股份有限公司 | A kind of scribbled dyeing waste processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |