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Treatment method of wastewater generated in cyclization step in production process of epoxy chloropropane from glycerol

A technology of epichlorohydrin and treatment methods, which is applied in natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems affecting the application of technology

Active Publication Date: 2013-10-09
NINGBO HUANYANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] As can be seen from the prior art described above, there are many defects in the prior art, which seriously affect the application of these technologies. Therefore, it is also very necessary to develop a low-cost, low-energy, Recycling methods of pollutants

Method used

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  • Treatment method of wastewater generated in cyclization step in production process of epoxy chloropropane from glycerol
  • Treatment method of wastewater generated in cyclization step in production process of epoxy chloropropane from glycerol
  • Treatment method of wastewater generated in cyclization step in production process of epoxy chloropropane from glycerol

Examples

Experimental program
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Effect test

Embodiment 1

[0097] Embodiment 1: the treatment of the waste water produced in the cyclization step in the glycerol method epichlorohydrin production method

[0098] The waste water that this embodiment handles contains 10.64%CaCl by described waste water weight 2 , 0.52%Ca(OH) 2 , the contents of glycerin and organic chlorine-containing compounds are listed in Table 1, wherein the total amount of organic chlorine-containing compounds is 50mg / L.

[0099] The equipment used in this embodiment is as follows: the reaction settler 3 is a non-standard container; the ceramic membrane filter 7 is a product sold by Zibo Dongqiang Environmental Protection Equipment Co., Ltd. under the trade name ceramic filter for water treatment; plate and frame filter press Or filter centrifuge 10 is a product sold by Zhangjiagang Baobao Centrifuge Manufacturing Company under the trade name PAUT type full-automatic scraper unloading centrifuge; the vacuum rake dryer is produced by Changzhou Yutong Drying Equipme...

Embodiment 2

[0120] Embodiment 2: the treatment of the waste water produced in the cyclization step in the glycerol method epichlorohydrin production method

[0121] The wastewater treated by this embodiment contains 12.0% CaCl by weight of the wastewater 2 , 0.3%Ca(OH) 2 , the contents of glycerol and organic chlorine-containing compounds are listed in Table 2.

[0122] The equipment used in this example is the same as that used in Example 1.

[0123] The implementation steps of this embodiment are as follows:

[0124] A. Hydrolysis reaction

[0125] The waste water is sent to the heater 2 by the former waste water delivery pump 1, and then sent to the reaction chamber 4 of the reaction settler 3 after being heated to 102° C., and 10 ppm of chlorine by the total weight of the waste water is added at the entrance of the reaction chamber 4 at the same time. Ferrous coagulant. In the reaction chamber, the hydrolysis reaction was carried out for 90min to convert the organic chlorine-cont...

Embodiment 3

[0138] Embodiment 3: the treatment of the wastewater produced in the cyclization step in the glycerol method epichlorohydrin production method

[0139] The wastewater treated by this embodiment contains 9.0% CaCl by weight of the wastewater 2 , 1.0%Ca(OH) 2 , the contents of organic chlorine-containing compounds are listed in Table 3.

[0140] The equipment used in this example is the same as that used in Example 1.

[0141] The implementation steps of this embodiment are as follows:

[0142] A. Hydrolysis reaction

[0143] The waste water is sent to the heater 2 by the former waste water delivery pump 1, and then sent to the reaction chamber 4 of the reaction settler 3 after being heated to 98° C., and 10 ppm of chlorine by the total weight of the waste water is added at the entrance of the reaction chamber 4 at the same time. Ferrous coagulant. Carry out hydrolysis reaction 60min in described reaction chamber, organic chlorine-containing compound is converted into glyce...

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Abstract

The invention relates to a treatment method for high-salinity organic wastewater generated in a production process of epoxy chloropropane from glycerol. The treatment method comprises the steps of: performing hydrolysis reaction on the high-salinity organic wastewater; performing advanced oxidization or wet oxidization; and concentrating and drying. The method is simple and convenient in process flow, easy to operate and control, and environment-friendly; inorganic precipitates in the wastewater can be recovered for producing building materials; organic chlorine-containing compounds in the wastewater are decomposed into glycerol, and the decomposition rate is up to more than 95%; two major pollutants in the wastewater, namely, calcium chloride and glycerol, are utilized for generating an environment-friendly snow-melting agent, so that the pollutant resource recovery is realized. Organic pollutants in the wastewater generated in the advanced oxidization or wet oxidization can be mineralized; calcium chloride in the wastewater is utilized for producing industrial calcium chloride. The treatment method has the beneficial effect that 'zero release' of the wastewater generated in a cyclization step in the production process of epoxy chloropropane from glycerol can be realized.

Description

【Technical field】 [0001] The invention belongs to the technical field of high-salt organic wastewater treatment. More specifically, the present invention relates to a treatment method for high-salinity organic wastewater produced in the production process of glycerin-based epichlorohydrin, which includes recovering calcium chloride by-products and recovering glycerin from the high-salinity organic wastewater, to achieve recycling of pollutants. 【Background technique】 [0002] Epichlorohydrin, also known as epichlorohydrin, is an important organic chemical raw material, mainly used in the production of epoxy resin, glass fiber reinforced plastics, electrical insulation materials, surfactants, medicines, pesticides, coatings, ion exchange resins, plasticizers, chlorine Alcohol rubber. [0003] The traditional industrial production methods of epichlorohydrin include propylene high-temperature chlorination method and propylene acetate method. The production capacity of the for...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/36
Inventor 施德龙童丽燕沈作伟尚名
Owner NINGBO HUANYANG CHEM
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