CN101445268B - Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate - Google Patents
Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate Download PDFInfo
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- CN101445268B CN101445268B CN2008101849744A CN200810184974A CN101445268B CN 101445268 B CN101445268 B CN 101445268B CN 2008101849744 A CN2008101849744 A CN 2008101849744A CN 200810184974 A CN200810184974 A CN 200810184974A CN 101445268 B CN101445268 B CN 101445268B
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Abstract
The present invention discloses a technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate, which is suitable for waste water treatment for the reduction process of the isooctyl thioglycolate. The technique comprises the following steps: firstly, the waste water is pumped into a storage tank by a vacuum pump and stands at normal temperature for precipitation and impurity removal; then the deslagging is carried out on the rest solution through a pumping filtration tank, the precipitation tank stands at the normal temperature for precipitation, and the BaCl2 is added and stirred at the normal temperature; the rest solution is pumped into a concentration kettle by using a corrosion-resistant centrifugal pump, and after temperature rising at low speed and vacuum treatment, and the KMnO4 and the NaOH tablet are added in, stirred and precipitate. The hydrogen chloride gas in the concentration kettle becomes muriate acid through a condenser, is put into a hydrochloric acid finished product storage tank, and the concentrated ZnCl2 solution in the concentration kettle is pumped to a zinc chloride finished product storage tank by using the vacuum pump after temperature reduction. By adopting the technique, not only all the zinc chloride and all the hydrogen chloride in the waste water are recovered, the pollution of the waste water in the original technique is eliminated, but also the wastes are reduced, the economic income is added, and the economic benefit is remarkable; and the technique is simple, easy to be operated and is feasible for popularization.
Description
1. affiliated technical field
Fa Benming relates to a kind of processing method that reclaims zinc chloride and hydrogenchloride from isooctyl mercaptoacetate reduction operation waste water.
2. background technology
Isooctyl mercaptoacetate is the fine chemical product of high-tech content.Reduction operation in its production process need be used hydrochloric acid and zinc powder.So just produced the waste acid water that contains zinc chloride, hydrogenchloride.For these waste acid waters, manufacturing enterprise both domestic and external generally all adopts and add alkali lye in spent acid solution, handles waste acid water with the neutral method.So not only waste resource, increased wastewater flow rate, strengthened production cost, but also polluted environment.
3. summary of the invention
Task of the present invention is, a kind of processing method that reclaims zinc chloride and hydrogenchloride from the waste acid water of isooctyl mercaptoacetate reduction operation is provided, thereby both from waste water, reclaimed zinc chloride and hydrogenchloride, reduced waste, reduced cost, also eliminated the pollution of waste acid water environment.
For finishing the foregoing invention task, technical scheme of the present invention is as follows.
A kind of technology that from isooctyl mercaptoacetate reduction operation waste water, reclaims zinc chloride.Its tooling mainly comprises valve tube, storage tank, suction filtration jar, slurry tank, test tank, concentration kettle, suction filtration groove, condenser, hydrochloric acid finished product storage tank and zinc chloride finished product storage tank.The top of storage tank, slurry tank and zinc chloride finished product storage tank is connected with valve tube by valve respectively.Behind the waste water reclamation of producing the generation of isooctyl mercaptoacetate reduction operation, with and stands at normal temperature for precipitation in the vacuum pump suction storage tank.When storage tank top produces floating matter, open valve between storage tank and the valve tube, connect storage tank and valve tube, thereby entering valve tube, the organism that swims in the upper strata is removed, then shut-off valve.Rest solution in the storage tank is leached solid impurity such as cadmia through the suction filtration jar with vacuum pump after, in the suction slurry tank, normal temperature quiescent settling 12 hours is opened the valve between slurry tank and the valve tube, connects slurry tank and valve tube, further removes the upper strata organism.In slurry tank, add BaCl
2, stirring at normal temperature is to remove the sulfate radical in the waste water.With slurry tank at the middle and upper levels clear liquid put into test tank, with corrosion resisting centrifugal pump the solution in the test tank is squeezed in the concentration kettle then, slowly be warming up to 80 ℃, keep vacuum tightness-0.04Mpa.When the solution in the concentration kettle be concentrated into contain zinc chloride 70% after, add KMnO
4, and then add the NaOH tablet, stirred 30 minutes, then quiescent setting.Hydrogen chloride gas in the concentration kettle enters condenser at this moment, enters in the hydrochloric acid finished product storage tank for dilute hydrochloric acid after the condensation.The ZnCl after concentrating in the concentration kettle
2After solution is cooled to normal temperature, be evacuated to zinc chloride finished product storage tank (9) with vacuum pump through the suction filtration groove.
The NaOH tablet that adds in concentration kettle contains NaOH95%.
The above-mentioned processing method that from isooctyl mercaptoacetate reduction operation waste water, reclaims zinc chloride, realized harmless treatment to whole waste water of reduction operation generation, zinc chloride and hydrogenchloride whole in the waste water have been reclaimed, reduced waste, increased income, reduced production cost, remarkable in economical benefits.And this technology is simple, feasible, easy to operate, is suitable for popularization.Simultaneously, use this kind method also to eliminate of the pollution of former processing wastewater to environment.
4. description of drawings
Fig. 1 process flow diagram
5. embodiment
A kind of technology that from isooctyl mercaptoacetate reduction operation waste water, reclaims zinc chloride.This tooling mainly comprises valve tube 10, storage tank 1, suction filtration jar 2, slurry tank 3, test tank 4, concentration kettle 5, suction filtration groove 6, condenser 7, hydrochloric acid finished product storage tank 8 and zinc chloride finished product storage tank 9.The top of storage tank 1, slurry tank 3 and zinc chloride finished product storage tank 9 is connected with valve tube 10 by valve respectively.Behind the waste water reclamation of producing the generation of isooctyl mercaptoacetate reduction operation, with and stands at normal temperature for precipitation in the vacuum pump suction storage tank 1.Connect storage tank 1 and valve tube 10, remove the organism that swims in the upper strata.Rest solution in the storage tank 1 is leached solid impurities such as cadmia through suction filtration jar 2 with vacuum pump after, in the suction slurry tank 3, normal temperature quiescent settling 12 hours.Connect slurry tank 3 and valve tube 10, further remove the upper strata organism.In slurry tank 3, add BaCl again
2, stirring at normal temperature.With slurry tank 3 at the middle and upper levels clear liquid put into test tank 4.Use corrosion resisting centrifugal pump then, the solution in the test tank 4 is squeezed in the concentration kettle 5.Slowly be warming up to 80 ℃, keep vacuum tightness-0.04Mpa.When the solution in the concentration kettle 5 be concentrated into contain zinc chloride 70% after, add KMnO
4, add the NaOH tablet again.The NaOH tablet that adds contains NaOH 95%.Stirred 30 minutes, then quiescent setting.Hydrogen chloride gas in the concentration kettle 5 enters condenser 7, enters in the hydrochloric acid finished product storage tank 8 for dilute hydrochloric acid liquid after the condensation.With the ZnCl after concentrating in the concentration kettle 5
2After solution is cooled to normal temperature, be evacuated to zinc chloride finished product storage tank 9 through suction filtration groove 6 usefulness vacuum pumps.
Claims (2)
1. a technology that reclaims zinc chloride from isooctyl mercaptoacetate reduction operation waste water is characterized in that,
The top of storage tank (1), slurry tank (3) and zinc chloride finished product storage tank (9) is connected with valve tube (10) by valve respectively,
Behind the waste water reclamation of producing the generation of isooctyl mercaptoacetate reduction operation, with and stands at normal temperature for precipitation in the vacuum pump suction storage tank (1), storage tank (1) is communicated with valve tube (10), remove the organism that swims in the upper strata, rest solution in the storage tank (1) is leached solid impurities such as cadmia with vacuum pump through suction filtration jar (2), in the suction slurry tank (3), normal temperature quiescent settling 12 hours, slurry tank (3) is communicated with valve tube (10), further remove the upper strata organism, in slurry tank (3), add BaCl again
2Stirring at normal temperature, with slurry tank (3) at the middle and upper levels clear liquid put into test tank (4), use corrosion resisting centrifugal pump that the solution in the test tank (4) is squeezed in the concentration kettle (5) then, slowly be warming up to 80 ℃, keep vacuum tightness-0.04Mpa, when the solution in the concentration kettle (5) be concentrated into contain zinc chloride 70% after, add KMnO
4, and then add the NaOH tablet, stirred 30 minutes, quiescent setting then, the gas in the concentration kettle (5) enter after condenser (7) condensation for dilute hydrochloric acid liquid enters in the hydrochloric acid finished product storage tank (8), with the ZnCl after concentrated in the concentration kettle (5)
2After solution is cooled to normal temperature, be evacuated to zinc chloride finished product storage tank (9) with vacuum pump through suction filtration groove (6).
2. the technology that reclaims zinc chloride from isooctyl mercaptoacetate reduction operation waste water according to claim 1 is characterized in that the NaOH tablet that adds contains NaOH 95% in concentration kettle (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101849744A CN101445268B (en) | 2008-12-19 | 2008-12-19 | Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate |
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| CN2008101849744A CN101445268B (en) | 2008-12-19 | 2008-12-19 | Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate |
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| CN101445268A CN101445268A (en) | 2009-06-03 |
| CN101445268B true CN101445268B (en) | 2011-09-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254103B (en) * | 2015-11-05 | 2017-09-19 | 广东工业大学 | A kind of classifying and reclaiming system and method for tin removal waste liquor |
| CN106397286B (en) * | 2016-08-25 | 2018-02-16 | 湖北犇星化工有限责任公司 | A kind of processing method of isooctyl thioglycolate rectifying waste material |
| CN107792875A (en) * | 2017-12-13 | 2018-03-13 | 曲阜师范大学 | A kind of tetrahydro-carbazolone produces method for treating waste liquid |
| CN109020022A (en) * | 2018-07-26 | 2018-12-18 | 中国平煤神马集团开封兴化精细化工有限公司 | A kind of processing method of saccharin waste acid water |
| CN112499668A (en) * | 2020-12-16 | 2021-03-16 | 中国船舶重工集团公司第七一八研究所 | Method and device for treating waste liquid containing water-soluble alcohol, zinc chloride and zinc powder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4865831A (en) * | 1988-02-26 | 1989-09-12 | The Dow Chemical Company | Recovery of zinc and ammonium chloride |
| CN101318750A (en) * | 2008-07-22 | 2008-12-10 | 湖北犇星化工有限责任公司 | Method for treating waste water from acetic acid mercapto- isooctyl ester |
-
2008
- 2008-12-19 CN CN2008101849744A patent/CN101445268B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4865831A (en) * | 1988-02-26 | 1989-09-12 | The Dow Chemical Company | Recovery of zinc and ammonium chloride |
| CN101318750A (en) * | 2008-07-22 | 2008-12-10 | 湖北犇星化工有限责任公司 | Method for treating waste water from acetic acid mercapto- isooctyl ester |
Non-Patent Citations (2)
| Title |
|---|
| 陈立波等.从氯甲醚合成母液中回收氧化锌.《辽宁化工》.1998,第27卷(第1期),50-51. * |
| 马杨辉.铟置换后液回收氯化锌的生产实践.《湖南有色金属》.2004,第20卷(第4期),18-20. * |
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