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Method of extracting organic matter from extracting mother liquid for reuse in resorcinol producing process

A technology of resorcinol and production process, which is applied in the field of extraction and recycling of organic matter in the extraction mother liquor of resorcinol production process

Inactive Publication Date: 2008-06-04
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the integrated treatment method similar to the extraction mother liquor in the production process of resorcinol in domestic and foreign literature

Method used

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  • Method of extracting organic matter from extracting mother liquid for reuse in resorcinol producing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 1L of resorcinol production process extraction mother liquor into the three-necked glass flask, add 7mL of concentrated sulfuric acid with a concentration of 98% by weight at one time, at an air flow rate of 0.2m 3 Aeration for 110min at / h. Utilize 10mL of 30% liquid caustic soda to recover volatilized n-butanol, accounting for about 95% of the total content, and rectify and purify more than 90% n-butanol in the rectifying tower at about 118°C.

[0022] 100mL (about 75g) of NDA-99 bifunctional adsorption resin (produced by Jiangsu Nanda God Environmental Protection Technology Co., Ltd.) was loaded into two jacketed glass adsorption columns (Φ32×360mm). At room temperature (10-30°C), extract the mother liquor from the resorcinol production process after the above-mentioned acidification-aeration treatment, and first pass through the NDA-99 dual-functional adsorption resin bed at a flow rate of 3BV / h, and the wastewater treatment capacity is 10BV / batch. The COD of...

Embodiment 2

[0025] Replace the three-necked glass flask in Example 1 with a plexiglass aeration tower (Φ600×1200mm, about 250L in effective volume) and carry out acidification-aeration treatment on the extracted mother liquor in the resorcinol production process, sulfuric acid concentration, aeration time, lye Concentration is consistent with embodiment 1, sulfuric acid consumption, air flow, lye consumption are all operated by 250 times of parameters in embodiment 1, and the ratio of treatment effect and recovery n-butanol is consistent with embodiment 1 basically.

[0026] Replace the glass adsorption column in Example 1 with a polypropylene adsorption column (Φ160 × 1000mm), fill each column with 10 kilograms (about 13 L) of resin, operate according to 130 times the wastewater treatment capacity in Example 1, and obtain The effect of adsorption treatment and organic matter extraction and recycling consistent with Example 1.

Embodiment 3

[0028] Use 316L stainless steel aeration tower (Φ 400 * 2400mm, effective volume about 250L) to replace the organic glass aeration tower (Φ 600 * 1200mm, effective volume about 250L) in the embodiment 2 to acidify the mother liquor extracted in the resorcinol production process- For the aeration treatment, the operating parameters of Example 2 were used to aerate for 150 minutes, and the treatment effect and the ratio of recovered n-butanol were consistent with Example 2.

[0029] Three 316L stainless steel adsorption towers (Φ200×1200mm) (numbered I, II, and III) with the same specifications were selected, and each tower was filled with 20 kg (about 25 L) of NDA-99 resin. At room temperature (10-30°C), extract the mother liquor from the resorcinol production process after the above-mentioned acidification-aeration treatment (COD is 11000mg / L, resorcinol content is about 2300mg / L, resorcinol content About 4000mg / L) into the adsorption tower, using the double towers (I, II towe...

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Abstract

The method of extracting and reusing organic matter from extracting mother liquid in resorcinol producing process includes the following steps: the first acidifying aeration pre-treatment of the extracting mother liquid, the subsequent alkali solution recovery of volatile gas and rectifying recovery of the extractant, extracting resorcinol and metapheylene disulfonic acid with bidirectional adsorbing resin, desorbing the resin with dilute alkali solution to obtain high concentration desorbing solution and returning the high concentration desorbing solution to the alkali fusion step for reuse in resorcinol production. The present invention realizes the separation and extraction of organic matter from the extracting mother liquid to reduce pollution to water environment with organic matter eliminating rate higher than 95 % and reuse organic matter in the reusing rate higher than 90 %.

Description

1. Technical field [0001] The invention relates to a method for extracting and recycling organic matter in the mother liquor extracted in the production process of resorcinol, more specifically, the extractant, resorcinol and resorcinol in the mother liquor extracted in the production process of resorcinol Methods of separation, enrichment, recovery and recycling. 2. Background technology [0002] Resorcinol is an important raw material for the production of synthetic resins, adhesives, dyes, medicines, ultraviolet absorbers, photosensitive film primers, explosives and cosmetics, and is widely used. Domestic enterprises mostly adopt the classic synthesis process, that is, the benzenesulfonic acid method: benzene undergoes a two-step sulfonation reaction to synthesize sodium resorcinol, then undergoes alkali fusion to synthesize resorcinol sodium, and finally produces resorcinol through acidification For the crude product, the crude product of resorcinol is extracted with n-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/08C07C37/68C07C309/29C07C303/42
Inventor 刘福强赵卫伟李爱民朱兆连崔扬葛俊杰龙超陈金龙张全兴
Owner NANJING UNIV