Method for treating wastewater of phosphate fire retardant production process

A technology of production process and treatment method, which is applied in the field of wastewater treatment of phosphate ester flame retardant production process, can solve the problems of high-concentration organic wastewater that is not easy to biodegrade, and is not feasible, so as to achieve outstanding treatment effect, increase yield, and realize The effect of zero emissions

Active Publication Date: 2017-01-18
福建新安科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The process wastewater produced during the production of phosphate flame retardants is a kind of high-concentration saline organic phosphorus wastewater, which is not easy to biodegrade. The treatment of high-concentration saline organic phosphorus wastewater has always been the industry standard A difficult problem for which there is currently no practical solution

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  • Method for treating wastewater of phosphate fire retardant production process
  • Method for treating wastewater of phosphate fire retardant production process
  • Method for treating wastewater of phosphate fire retardant production process

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Embodiment 1

[0030] The method for the treatment of waste water in the production process of phosphate ester flame retardant, its steps are as follows:

[0031] 1) Put the process wastewater generated during the preparation of phosphate ester flame retardants into high-temperature and high-vacuum devices (such as thin-film evaporators, rectification towers, kettles, etc.) boiling point substances;

[0032] 2) After step 1) the phosphate ester wastewater treated by removing low boiling matter enters the wastewater stratification tank for static stratification, and the phosphate ester material obtained in the lower part of the wastewater stratification tank is reused to the alkali washing process in the phosphoric acid ester post-treatment , filter the wastewater obtained from the upper part of the wastewater stratification box, filter out the solid residue in the wastewater, and control the mass content of phosphate in the filtered wastewater to be within 1%;

[0033] 3) The waste water fi...

Embodiment 2

[0039] The method for the treatment of waste water in the production process of phosphate ester flame retardant, its steps are as follows:

[0040] 1) Put the process wastewater generated during the preparation of phosphate ester flame retardants into high-temperature and high-vacuum devices (such as thin-film evaporators, rectification towers, kettles, etc.) boiling point substances;

[0041] 2) After step 1) the phosphate ester wastewater treated by removing low boiling matter enters the wastewater stratification tank for static stratification, and the phosphate ester material obtained in the lower part of the wastewater stratification tank is reused to the alkali washing process in the phosphoric acid ester post-treatment , filter the wastewater obtained from the upper part of the wastewater stratification box, filter out the solid residue in the wastewater, and control the mass content of phosphate in the filtered wastewater to be within 1%;

[0042] 3) The waste water fi...

Embodiment 3

[0047]The method for the treatment of waste water in the production process of phosphate ester flame retardant, its steps are as follows:

[0048] 1) Put the process wastewater generated during the preparation of phosphate ester flame retardants into high-temperature and high-vacuum devices (such as thin-film evaporators, rectification towers, kettles, etc.) boiling point substances;

[0049] 2) After step 1) the phosphate ester wastewater treated by removing low boiling matter enters the wastewater stratification tank for static stratification, and the phosphate ester material obtained in the lower part of the wastewater stratification tank is reused to the alkali washing process in the phosphoric acid ester post-treatment , filter the wastewater obtained from the upper part of the wastewater stratification box, filter out the solid residue in the wastewater, and control the mass content of phosphate in the filtered wastewater to be within 1%;

[0050] 3) The waste water fil...

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Abstract

The invention discloses a method for treating wastewater of a phosphate fire retardant production process. The wastewater of the phosphate fire retardant production process is high-concentration salt-containing organic phosphorus wastewater, wastewater treatment is always a difficult problem in the industry, and at present there is no feasible method. The method includes the following steps that 1, process wastewater produced in the phosphate fire retardant preparation process is subjected to low-boiling-point substance removal treatment; 2, the wastewater is fed into a wastewater layering box for static layering; 3, the wastewater is fed into a multistage sedimentation pool for sedimentation, the lower-layer material of the multistage sedimentation pool is recycled, and the upper-portion wastewater is subjected to subsequent treatment; 4, dosing treatment is performed, and organic phosphorus and inorganic phosphorus in the wastewater precipitate in the form of solid; 5, centrifugal separation or filtering is performed. The various impurities in the wastewater of the phosphate fire retardant production process are effectively removed through low-boiling-point substance removal, static layering, multistage sedimentation and dosing treatment, process wastewater reuse is achieved, and the method is economic and environmentally friendly.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a method for treating waste water in a phosphate ester flame retardant production process. Background technique [0002] Phosphate ester flame retardant is the second largest type of flame retardant in the world, with a global output value of about 1.2 billion US dollars. Compared with other flame retardants, phosphate ester flame retardants have long-lasting flame retardant effects, good compatibility with polymer substrates, water resistance, weather resistance, heat resistance and migration resistance, etc., and are indispensable in the field of polyurethane and other polymer materials. The importance of substitution. With the increasing requirements for environmental protection, the application range of traditional bromine-based and other halogen flame retardants is limited to varying degrees, while phosphate ester flame retardants are environmentally friendly flame reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F1/001C02F1/04C02F1/048C02F1/38C02F1/52C02F1/58C02F9/00C02F2103/36C02F2301/08
Inventor 揭少卫许自华高勇民王绍龙钱广滨
Owner 福建新安科技有限责任公司
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