Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate

A technology of isooctyl mercaptoacetate and isooctyl acetate, which is applied in the field of recycling zinc chloride and hydrogen chloride, can solve problems such as increasing production costs, increasing waste water volume, and polluting the environment, and achieves waste reduction, pollution elimination, and production reduction cost effect

Active Publication Date: 2009-06-03
三门峡奥科化工有限公司
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This not only wastes resources, increases the amount of waste wat

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  • Technique for recovering zinc chloride from waste water in reduction process of isooctyl thioglycolate

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[0009] A process for recovering zinc chloride from waste water in the reduction process of isooctyl thioglycolate. The process equipment mainly includes vacuum tube 10, storage tank 1, suction filter tank 2, settling tank 3, metering tank 4, concentration kettle 5, suction filter tank 6, condenser 7, hydrochloric acid product storage tank 8 and zinc chloride product storage tank 9. The upper parts of storage tank 1, settling tank 3 and zinc chloride product storage tank 9 are respectively connected with vacuum pipe 10 through valves. After recovering the waste water produced in the reduction process of isooctyl thioglycolate, it is pumped into the storage tank 1 by a vacuum pump for static precipitation at normal temperature. Connect the storage tank 1 and the vacuum pipe 10 to remove the organic matter floating on the upper layer. After the remaining solution in the storage tank 1 is filtered out of solid impurities such as zinc slag through the suction filter tank 2 by a v...

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Abstract

The 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. Technical field [0001] The invention relates to a process for recovering zinc chloride and hydrogen chloride from waste water in the reduction process of isooctyl thioglycolate. 2. Background technology [0002] Isooctyl Thioglycolate is a high-tech fine chemical product. The reduction process in its production process requires the use of hydrochloric acid and zinc powder. In this way, waste acid water containing zinc chloride and hydrogen chloride is produced. For these waste acid water, manufacturers at home and abroad generally use the method of neutralizing the waste acid water by adding lye to the waste acid liquid. This not only wastes resources, increases the amount of waste water, increases production costs, but also pollutes the environment. 3. Contents of the invention [0003] The task of the present invention is to provide a kind of processing method of reclaiming zinc chloride and hydrogen chloride from the waste acid water of the isooctyl mercaptoacetat...

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Application Information

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IPC IPC(8): C01G9/04C02F1/58C02F103/36
Inventor 兀吉康赵松芳
Owner 三门峡奥科化工有限公司
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