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Method for treating sewage generated in preparation of p-hydroxybenzoic acid

A sewage treatment method and p-hydroxybenzoic acid technology are applied in the field of sewage treatment for the preparation of p-hydroxybenzoic acid, can solve the problems of waste of resources, low treatment efficiency and the like, and achieve the effects of saving resources, low solid content and improving treatment efficiency

Pending Publication Date: 2021-11-30
ZHEJIANG SHENGXIAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a sewage treatment method for preparing p-hydroxybenzoic acid by filtering the mother liquid water, which solves the problems of low treatment efficiency and waste of resources in the existing methods

Method used

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  • Method for treating sewage generated in preparation of p-hydroxybenzoic acid
  • Method for treating sewage generated in preparation of p-hydroxybenzoic acid
  • Method for treating sewage generated in preparation of p-hydroxybenzoic acid

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Experimental program
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Embodiment 1

[0036] Embodiment one, see figure 1 and figure 2A sewage system includes a mother liquor pool 1 and a washing pool 2, and a circulation separation device is arranged between the mother liquor pool and the washing pool. The circulation separation device includes a circulation separation chamber 3 . A rotating shaft 31 is rotatably connected in the separation chamber. The rotating shaft is erected, and the upper end of the rotating shaft is connected with the motor 17. A coarse filter partition 6 and a fine filter partition 7 are arranged sequentially from top to bottom in the circulation separation chamber. The filter partition and the fine filter partition isolate the primary filter chamber 9, the fine filter chamber 10 and the water passage chamber 11 distributed sequentially from top to bottom in the circulation separation chamber. The lower ends of the primary filter chamber, the fine filter chamber and the water passage chamber are all provided with discharge holes 13...

Embodiment 2

[0038] Embodiment two, see image 3 and figure 2 , a sewage treatment system, comprising a mother liquor pool 1 and a washing pool 2, a circulation separation device is arranged between the mother liquor pool and the washing pool. The circulation separation device includes a circulation separation chamber 3 . A rotating shaft 31 is rotatably connected in the separation chamber. The rotating shaft is erected, and the upper end of the rotating shaft is connected with the motor 17. A coarse filter partition 6 and a fine filter partition 7 are arranged sequentially from top to bottom in the circulation separation chamber. The filter partition and the fine filter partition isolate the primary filter chamber 9, the fine filter chamber 10 and the water passage chamber 11 distributed sequentially from top to bottom in the circulation separation chamber. The lower ends of the primary filter chamber, the fine filter chamber and the water passage chamber are all provided with discha...

Embodiment 3

[0039] Embodiment three, see Figure 4 to Figure 6 , a sewage treatment system, comprising a mother liquor pool 1 and a washing pool 2, a circulation separation device is arranged between the mother liquor pool and the washing pool. The circulation separation device includes a circulation separation chamber 3, which is provided with a conical sweeping cylinder 4 with a closed upper end and an open lower end. The upper end of the conical sweeping cylinder is small and the lower end is large. The centrifugal cylinder 5, the centrifugal cylinder and the conical sweeping cylinder divide the circulation separation cavity into an inner cavity and an outer cavity. The outer cavity is provided with a coarse filter partition 6, a fine filter partition 7 and a partition plate 8 in turn from top to bottom. The filter clapboard, the fine filter clapboard and the partition plate isolate the primary filter chamber 9, the fine filter chamber 10, the water chamber 11 and the dope chamber 12 d...

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Abstract

The invention discloses a method for treating sewage generated in preparation of p-hydroxybenzoic acid. Sewage in a mother liquor pool is input into a circulating separation device for solid separation and then input into a washing pool for treatment. The invention provides a method for treating sewage generated in preparation of p-hydroxybenzoic acid, which is used for filtering mother liquor, and solves the problems of low treatment efficiency and resource waste in the existing mode.

Description

technical field [0001] The application relates to the technical field of phenol-containing wastewater treatment equipment, in particular to a method for treating wastewater produced from p-hydroxybenzoic acid. Background technique [0002] p-Hydroxybenzoic acid, or PHBA, is an important raw material for organic synthesis. Because of its unique hydroxyl and carboxyl functional groups, it has become one of the most widely used materials in organic chemical raw materials. It is used in medicine, pesticides, food, electronic communications, and polymer materials. Widely used in industry and other fields. In recent years, there has been a huge demand for PHBA in domestic and foreign markets. Compared with foreign technologies, my country's PHBA production process is relatively backward, with complex operations, low yield, high energy consumption and large wastewater production. In addition, with the continuous development of society, the demand for high-purity, low-chroma, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F103/36
CPCC02F1/001C02F1/38C02F2103/36C02F2301/08
Inventor 袁鹏章丽冯永胜秦秀芳胡秀雪王先英郭小忠
Owner ZHEJIANG SHENGXIAO CHEM