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Treatment method of waste water in hydroxybenzoic acid production

A technology for para-hydroxybenzoic acid and production wastewater, which is applied in the fields of natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problem of low treatment rate, inability to recycle chemical raw materials, and difficulty in treatment of production wastewater. Large and other problems, to achieve the effect of low operating cost, convenient industrialization implementation, and good wastewater treatment effect

Inactive Publication Date: 2011-06-15
SUZHOU INST FOR ADVANCED STUDY USTC
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Problems solved by technology

[0008] The purpose of the present invention is to provide a treatment method for hydroxybenzoic acid production wastewater, which solves the problems in the prior art that the treatment of high-concentration hydroxybenzoic acid production wastewater is difficult, the treatment rate is low, and the chemical raw materials in the original wastewater cannot be recovered.

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  • Treatment method of waste water in hydroxybenzoic acid production
  • Treatment method of waste water in hydroxybenzoic acid production
  • Treatment method of waste water in hydroxybenzoic acid production

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Embodiment Construction

[0038] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0039] Example The treatment of waste water from the production of p-hydroxybenzoic acid in a chemical enterprise

[0040] (1) Synthesis of modified macroporous resin

[0041] The macroporous adsorption resin was synthesized by a two-step method. Including the preparation of macroporous microspheres, chloromethylation reaction and post-crosslinking reaction; wherein the preparation of macroporous microspheres uses a certain amount of styrene (St) monomer, divinylbenzene (DVB) crosslinking agent and toluene and...

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Abstract

The invention discloses a treatment method of waste water in hydroxybenzoic acid production, which is characterized by comprising the following steps of: (1) conducting pretreatments of acidation, precipitation and filtering on waste water; (2) conducting adsorption treatment on the filtrate obtained in the step (1) at the temperature of 5-40 DEG C and at the flow of 0.5-2 column volume per hour through an adsorption column filled with modified macroporous absorbent resin; and (3) conducting biochemical treatment on the adsorption effluent obtained after step (2). The p-hydroxybenzoic acid recycled by the method and the intermediate thereof can be reused as raw materials in the original production technique, and waste water treatment and recycling of waste are realized simultaneously. Themethod has good waste water treatment effect, is easy for desorption and regeneration, reduces the use amount of the modified macroporous resin, and is easy for industrialized implementation.

Description

technical field [0001] The invention belongs to the technical field of treatment and resource utilization of hydroxybenzoic acid production wastewater, and in particular relates to a treatment method for hydroxybenzoic acid production wastewater. Background technique [0002] According to statistics, my country's annual output of p-hydroxybenzoic acid reaches tens of thousands of tons, and many varieties are exported, which have a certain influence in the international market. However, there is still no suitable treatment and recycling method for high-concentration refractory organic wastewater containing the above pollutants, and in most cases it can only be discharged directly. It not only pollutes the environment, destroys ecology, endangers personal health, but also wastes a lot of valuable chemical raw materials. With the serious situation of environmental protection in our country and the increasing pressure of environmental protection, many production enterprises hav...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/36C02F1/42
Inventor 梁好均黄游张佳志都宏霞胡宗敏刘伟
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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