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Integral treatment method for waste water of acephate producing process

A kind of technology of acephate and production process, which is applied in the field of comprehensive treatment of acephate production process wastewater, which can solve the problems of difficult biochemical treatment, high content of ammonia nitrogen in wastewater, and high treatment cost, so as to achieve low treatment cost and reduce pollution emission of pollutants and the effect of cleaning the production environment

Inactive Publication Date: 2008-07-09
荆州沙隆达控股有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the ammonia nitrogen content in the wastewater is high, the biochemical treatment is difficult and the treatment cost is high, and it is a pity that a large amount of renewable resources in the wastewater - ammonium acetate is wasted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Get 604g of acephate production process waste water containing 30% of ammonium acetate, control the reaction temperature at 30°C, add 150g of hydrochloric acid, adjust PH=3, distill to obtain 508g of dilute acetic acid with a content of 25%, the recovery rate of acetic acid is 90%, and crystallize to obtain 125 g of ammonium chloride with a content of 98%.

[0011] Take 176.5g of dilute acetic acid with a content of 25%, control the reaction temperature at 30-100°C, add 42g of soda ash, adjust the pH to 8, distill and crystallize to obtain 95g of NaAc·3H with a content of 98% 2 O, yield 95%.

Embodiment 2

[0013] Get 518g of acephate production process waste water containing 35% of ammonium acetate, control the reaction temperature at 100°C, add 150g of hydrochloric acid, adjust PH=4, and distill to obtain 508g of dilute acetic acid with a content of 25%. The recovery rate of acetic acid is 90%, and crystallization obtains 125 g of ammonium chloride with a content of 98%.

[0014] Take 176.5g of dilute acetic acid with a content of 25%, control the reaction temperature at 30-100°C, add 42g of soda ash, adjust the pH to 9, distill and crystallize to obtain 95g of NaAc·3H with a content of 98% 2 O, yield 95%.

Embodiment 3

[0016] Get 518g of acephate production process waste water containing 35% of ammonium acetate, control the reaction temperature at 60°C, add 150g of hydrochloric acid, adjust PH=6, distill to obtain 508g of dilute acetic acid with a content of 25%, the recovery rate of acetic acid is 90%, and crystallize to obtain 125 g of ammonium chloride with a content of 98%.

[0017] Take 176.5g of dilute acetic acid with a content of 25%, control the reaction temperature at 30-100°C, add 42g of soda ash, adjust the pH to 11, distill and crystallize to obtain 95g of NaAc·3H with a content of 98% 2 O, yield 95%.

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Abstract

The invention relates to a sewage water treating method, in particular to a comprehensive treatment method of sewage water of n-acetoacetyl methylamine production. The invention is characterized in that adding acid into the sewage water of n-acetoacetyl methylamine production with the temperature controlled between 0-100 DEG C, adjusting pH value to 0.5-9, then distilling and crystallizing at the temperature between 50-150 DEG C and separating out dilute acetic acid and inorganic ammonium salt. The invention has the advantages of reasonable process flow, convenient operation and low disposal cost. Employing the invention technique can increase benefit, also can reduce the discharging capacity of the contaminant and meet the environmental protection need of clean production and energy saving and discharge reducing, thereby the invention has important value of popularization and application.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a comprehensive treatment method for acephate production process wastewater. Background technique [0002] During the production of the pesticide acephate, a large amount of wastewater containing ammonium acetate will be produced, and every ton of acephate produced will produce 2 tons of wastewater containing about 30% ammonium acetate. At present, most domestic manufacturers directly discharge this wastewater after biochemical treatment. The disadvantages of this method are: the ammonia nitrogen content in the wastewater is high, the biochemical treatment is difficult and the treatment cost is high, and it is a pity that a large amount of renewable resources in the wastewater - ammonium acetate - is wasted. Therefore, it is very beneficial for us to invent a kind of treatment method of acephate production process wastewater. Contents of the invention [0003] The purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/66C02F1/04C02F1/58C07C51/44C07C53/08C07C53/10C01C1/28
Inventor 何富春殷宏薛光才刘孝平戴锋陈哓明杨光富尤文玲潘晖周泉霍晓琼
Owner 荆州沙隆达控股有限公司
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