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Method for recycling dibenzoylmethane production wastewater

A dibenzoylmethane and waste water production technology, which is applied to chemical instruments and methods, water pollutants, natural water treatment, etc., can solve the problems of low environmental protection and low production capacity of dibenzoylmethane production, and achieve improved The effect of improving economic benefits, protecting the environment and avoiding pollution

Pending Publication Date: 2022-07-29
江西大地制药有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A method for recycling waste water from dibenzoylmethane production proposed by the present invention solves the problems of low environmental protection and low production capacity of dibenzoylmethane production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for recycling waste water from dibenzoylmethane production, comprising the following steps:

[0024] (1) Waste water collection: prepare clean No. 1 container, extract the waste water in the production process of dibenzoylmethane, and pack the waste water in No. 1 container;

[0025] (2) Acid-base adjustment: prepare a clean No. 2 container, put alkaline water in the No. 2 container, pour the acid water waste water in the No. 1 container into the No. 2 container with alkaline water, and make the No. 2 container The pH value is adjusted to 4-6;

[0026] (3) take stratification: add the extraction solvent in the No. 2 container after acid-base regulation, the extraction solvent carries out extraction and stratification to waste water, obtains organic layer and water layer, and the residual benzoic acid after the solvent in the organic layer is concentrated and recovered, The water layer is cooled and crystallized, and centrifuged to obtain sodium sulfate decahyd...

Embodiment 2

[0033] A method for recycling waste water from dibenzoylmethane production, comprising the following steps:

[0034] (1) Waste water collection: prepare clean No. 1 container, extract the waste water in the production process of dibenzoylmethane, and pack the waste water in No. 1 container;

[0035] (2) Acid-base adjustment: prepare a clean No. 2 container, put alkaline water in the No. 2 container, pour the acid water waste water in the No. 1 container into the No. 2 container with alkaline water, and make the No. 2 container The pH value is adjusted to 4-6;

[0036] (3) take stratification: add the extraction solvent in the No. 2 container after acid-base regulation, the extraction solvent carries out extraction and stratification to waste water, obtains organic layer and water layer, and the residual benzoic acid after the solvent in the organic layer is concentrated and recovered, The water layer is cooled and crystallized, and centrifuged to obtain sodium sulfate decahyd...

Embodiment 3

[0043]A method for recycling waste water from dibenzoylmethane production, comprising the following steps:

[0044] (1) Waste water collection: prepare clean No. 1 container, extract the waste water in the production process of dibenzoylmethane, and pack the waste water in No. 1 container;

[0045] (2) Acid-base adjustment: prepare a clean No. 2 container, put alkaline water in the No. 2 container, pour the acid water waste water in the No. 1 container into the No. 2 container with alkaline water, and make the No. 2 container The PH value is adjusted to 4-6;

[0046] (3) take stratification: add the extraction solvent in the No. 2 container after acid-base regulation, the extraction solvent carries out extraction and stratification to waste water, obtains organic layer and water layer, and the residual benzoic acid after the solvent in the organic layer is concentrated and recovered, The water layer is cooled and crystallized, and centrifuged to obtain sodium sulfate decahydr...

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PUM

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Abstract

The invention belongs to the field of wastewater utilization, and particularly relates to a dibenzoylmethane production wastewater recycling method which aims at solving the problems that existing dibenzoylmethane production is not high in environmental protection property and low in productivity, and comprises the following steps: collecting wastewater generated in dibenzoylmethane production, pouring the wastewater into alkaline water to carry out acid-base adjustment, filtering, washing, and drying to obtain the dibenzoylmethane production wastewater. Then extracting and layering the wastewater through an extracting solvent to obtain an organic layer and a water layer, concentrating and recovering the solvent in the organic layer to obtain residual benzoic acid, cooling and crystallizing the water layer, centrifuging to obtain sodium sulfate decahydrate and wastewater, filtering out a small amount of sodium sulfate in the wastewater, diluting concentrated sulfuric acid and liquid caustic soda for next batch feeding, and circulating in this way, therefore, the cyclic utilization of the wastewater is realized. The method provided by the invention solves the problem of low environmental protection property of dibenzoylmethane production, solves the problem of low productivity of dibenzoylmethane production by recycling the wastewater, and can improve the production benefits of enterprises.

Description

technical field [0001] The invention relates to the technical field of waste water utilization, in particular to a method for recycling waste water from dibenzoylmethane production. Background technique [0002] Dibenzoylmethane (DBM) is an important light and heat stabilizer for thermoplastics with β-diketone structure. The product is non-toxic and tasteless, and is widely used in PVC plastics and ABS resins. The light stabilizers currently used in the world are mainly hindered amines, benzotriazoles and benzophenones. In the future, the development of stabilizers should be developed in the direction of high-efficiency, multi-functional and non-toxic new products, conform to the trend of environmental protection, reduce the production of polluting and toxic stabilizers, and develop and increase the production and promotion of β-diketone additives. Compared with common varieties, DBM has wider absorption and lower transmittance to outdoor ultraviolet rays, and its ultraviol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C07C51/42C07C63/06C01D5/16C01D5/02C02F101/10C02F101/38C02F103/36
CPCC02F9/00C07C51/42C01D5/16C01D5/02C02F1/66C02F1/26C02F1/265C02F1/001C02F2101/38C02F2103/36C02F2101/101C02F2209/06C02F2209/02C07C63/06
Inventor 陈诚乐吴丙华张峰彪
Owner 江西大地制药有限责任公司
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