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Novel process for treating industrial wastewater with benzyl alcohol

A technology for industrial wastewater and benzyl alcohol, applied in multi-stage water treatment, water/sewage treatment, natural water treatment and other directions, can solve the problems of production system impact, multi-effect evaporation method side reaction, inability to biochemically treat benzyl alcohol wastewater, etc. To achieve the effect of reducing operating costs, saving steam, and achieving significant economic and environmental benefits

Inactive Publication Date: 2016-06-22
HUBEI GREENHOME MATERIALS TECH INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a new process for the treatment of benzyl alcohol industrial wastewater to solve the problem that the existing resin adsorption means cannot biochemically treat the benzyl alcohol wastewater, and the multi-effect evaporation means cannot be reused for production or production due to the recovered sodium chloride containing benzyl alcohol. Forming sales, multi-effect evaporation method produces a large number of side reactions, and has a large impact on the production system Technical problems

Method used

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  • Novel process for treating industrial wastewater with benzyl alcohol
  • Novel process for treating industrial wastewater with benzyl alcohol
  • Novel process for treating industrial wastewater with benzyl alcohol

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] combine figure 1 , 2 , Shown in 3, novel technique of the present invention comprises the following steps:

[0029] 1) Waste water 1 enters waste water storage tank a, adds flocculant 2, and performs continuous oil-water separation. The upper layer oil phase 3 continuously overflows into the crude distillation tower b, the middle layer water phase 4 is continuously pumped into the resin adsorption tower c, and the lower layer mud 5 according to After settling time, it is withdrawn from the waste water storage tank a, enters the filter press d for pressure filtration, and the filtrate is transferred back to the waste water storage tank a.

[0030] 2) The middle water phase 4 is sequentially pumped into the fourth-stage resin adsorption tower c for adsorption treatment. The adsorption flow rate is generally 1.2bv / h of resin capacity, and the first-stage adsorption tower reaches saturation after 8 hours of adsorption time, and the content of benzyl alcohol in the effluen...

Embodiment 2

[0035] combine figure 1 , 2 , Shown in 3, novel technique of the present invention comprises the following steps:

[0036] 1) Waste water 1 enters waste water storage tank a, adds flocculant 2, and performs continuous oil-water separation. The upper layer oil phase 3 continuously overflows into the crude distillation tower b, the middle layer water phase 4 is continuously pumped into the resin adsorption tower c, and the lower layer mud 5 according to After settling time, it is withdrawn from the waste water storage tank a, enters the filter press d for pressure filtration, and the filtrate is transferred back to the waste water storage tank a.

[0037] 2) The middle water phase 4 is sequentially pumped into the fourth-stage resin adsorption tower c for adsorption treatment. The adsorption flow rate is generally 1.3bv / h of resin capacity, and the first-stage adsorption tower reaches saturation after 10 hours of adsorption time, and the content of benzyl alcohol in the effluent...

Embodiment 3

[0042] combine figure 1 , 2 , Shown in 3, novel technique of the present invention comprises the following steps:

[0043] 1) Waste water 1 enters waste water storage tank a, adds flocculant 2, and performs continuous oil-water separation. The upper layer oil phase 3 continuously overflows into the crude distillation tower b, the middle layer water phase 4 is continuously pumped into the resin adsorption tower c, and the lower layer mud 5 according to After settling time, it is withdrawn from the waste water storage tank a, enters the filter press d for pressure filtration, and the filtrate is transferred back to the waste water storage tank a.

[0044] 2) The middle water phase 4 is sequentially pumped into the fourth-stage resin adsorption tower c for adsorption treatment. The adsorption flow rate is generally 1.5bv / h of resin capacity. Generally, the first-stage adsorption tower reaches saturation after 12 hours of adsorption time, and the content of benzyl alcohol in the...

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Abstract

The invention relates to a novel process for treating industrial wastewater with benzyl alcohol and salt. The novel process includes steps of (1), adsorbing and recycling the benzyl alcohol in the wastewater, and to be more specific, treating the industrial wastewater with the benzyl alcohol by the aid of macroporous resin four-stage cascade adsorption technologies; (2), comprehensively utilizing NaCl in the wastewater by means of electrodialysis, to be more specific, concentrating the adsorbed and treated wastewater by the aid of mechanical vapor recompression (MVR) to obtain high-salt wastewater, treating the high-salt wastewater by the aid of bipolar membrane electrodialysis to recycle hydrogen chloride and sodium hydroxide which are electrodialysis byproducts. The benzyl alcohol adsorption rate in the step (1) can reach 99.8% at least, and the content of the benzyl alcohol in the wastewater treated at the step (1) reaches 100 ppm. The novel process has the advantages that the environment polluting industrial wastewater with the benzyl alcohol can be treated by the aid of the novel process, the benzyl alcohol and the sodium chloride in the wastewater can be recycled, accordingly, the production cost can be obviously reduced, and the novel process has economical and environmental protection benefits.

Description

technical field [0001] The design of the present invention relates to the treatment method of benzyl alcohol industrial wastewater, which mainly includes four-stage series resin adsorption to reduce the COD of benzyl alcohol wastewater, MVR technology to increase the salt concentration of wastewater, and bipolar membrane electrodialysis to co-produce sodium hydroxide and hydrogen chloride. technical background [0002] With the development of the national economy, the variety and quantity of fine chemical products in my country are showing a rapid growth trend. As an extended product of benzyl chloride, benzyl alcohol is an important organic chemical product and intermediate, widely used in medicine and spices. In addition, due to the continuous development of downstream products of benzyl alcohol, the use of benzyl alcohol will increase significantly. [0003] The current main production method of benzyl alcohol is the production of benzyl alcohol by alkaline hydrolysis of b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01B7/07C01D1/38C07C29/76C07C33/22
CPCC02F9/00C01B7/0706C01D1/38C02F1/041C02F1/285C02F1/4693C02F1/5236C02F1/56C02F2103/36C02F2301/08C07C29/76
Inventor 毛铤余军霞肖华青池汝安刘东徐源来
Owner HUBEI GREENHOME MATERIALS TECH INC
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