Recycling utilization and processing method for wastewater generated in sebacic acid production process

Abstract

The invention releases to a recycling utilization and processing method for wastewater generated in a sebacic acid production process, in particular to a recycling utilization and processing method for wastewater containing phenol and sodium sulfate generated in the sebacic acid production process. The method comprises the following steps: (1) carrying out solid-liquid separation; (2) regulating a pH value; (3) carrying out liquid-liquid separation; (4) regulating the pH value; (5) evaporating and concentrating; (6) cooling and crystallizing; (7) carrying out solid-liquid separation; (8) regulating the pH value; (9) evaporating and drying; (10) condensing; (11) regulating the pH value; and (12) evaporating and condensing. With the technical method, the byproduct sodium sulfate can be obtained while sodium phenate is obtained. The recycling utilization and processing method has the advantages of reasonable technology, simple method, low operation cost, and high valuable ingredient use ratio, and is energy-saving and environmentally-friendly, and the generated products have high quality.

Description

technical field [0001] The invention belongs to the field of environmental chemical industry, in particular to a resource utilization and treatment method for waste water containing phenol, sodium sulfate and other organic matter produced in the production process of sebacic acid. Background technique [0002] At present, the production process of using castor oil cracking to prepare sebacic acid is: using castor oil as the main raw material, sebacic acid is synthesized through hydrolysis, cracking, neutralization, decolorization, acidification, washing, dehydration, drying and other operations. [0003] (1) Hydrolysis: Castor oil reacts with excess water under certain conditions to produce ricinoleic acid and glycerin. After the reaction is finished, the material is divided into upper and lower layers after standing still, the upper layer is ricinoleic acid, and the lower layer is acid glycerin. Acidic glycerin is neutralized and dehydrated to obtain industrial glycerin. ...

AI Technical Summary

Problems solved by technology

If the wastewater is directly discharged, on the one hand, the valuable components in the wastewater cannot be fully utilized, resulting in a large waste of resources, increasing production costs, and on the other hand, causing serious environmental pollution.

If the harmless treatment of wastewater is carried out separately, the treatment cost will be greatly increased. The high treatment cost and extremely low cost performance make it difficult to apply the harmless treatment alone in practice.

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