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

A technology of production process and treatment method, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that valuable components cannot be fully utilized, increase treatment costs, high Dealing with cost and other issues to achieve low cost, reduced processing costs, and good product quality

Inactive Publication Date: 2012-01-11
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The main process equipment is subsidence solid-liquid separation device, subsidence type liquid-liquid separation equipment, heat pump evaporation and concentration equipment, cooling crystallization equipment and evaporation concentration and drying equipment, etc.

[0047] A method for resource utilization and treatment of waste water in the production process of sebacic acid is a method for resource utilization and treatment of waste water containing phenol and sodium sulfate produced in the process of sebacic acid production. % phenol and the waste water of 5%~20% sodium sulfate, and recycle the method for sodium phenate and sodium sulfate, described method step is as follows:

[0048] (1) Solid-liquid separation: 1m 3 Wastewater containing 2kg of phenol and 50kg of sodium sulfate is subjected to solid-liquid separation in a sedimentation type solid-liquid separation device, the solid phase waste residue is removed, and the liquid phase enters the next step;

[004...

Embodiment 2

[0061] The main process equipment is filter type solid-liquid separation device, centrifugal liquid-liquid separation device, heat pump evaporation and concentration equipment, cooling crystallization equipment and evaporation concentration and drying equipment, etc.

[0062] A method for resource utilization and treatment of waste water in the production process of sebacic acid is a method for resource utilization and treatment of waste water containing phenol and sodium sulfate produced in the process of sebacic acid production. The waste water of 5%~20% sodium sulfate, and recycle the method for sodium phenate and sodium sulfate, described method step is as follows:

[0063] (1) Solid-liquid separation: 1m 3 Wastewater containing 10kg of phenol and 200kg of sodium sulfate is subjected to solid-liquid separation in a filter-type solid-liquid separation device, solid-phase waste residue is removed, and the liquid phase of the hydrochloric acid pickling wastewater after deslag...

Embodiment 3

[0076] The main process equipment is centrifugal solid-liquid separation device, high-efficiency oil-water separator, heat pump evaporation and concentration equipment, cooling crystallization equipment, evaporation concentration and drying equipment, etc.

[0077] A method for resource utilization and treatment of waste water in the production process of sebacic acid is a method for resource utilization and treatment of waste water containing phenol and sodium sulfate produced in the process of sebacic acid production. The waste water of 5%~20% sodium sulfate, and recycle the method for sodium phenate and sodium sulfate, described method step is as follows:

[0078] (1) Solid-liquid separation: 1m 3 Wastewater containing 5kg of phenol and 100kg of sodium sulfate is subjected to solid-liquid separation in a centrifugal solid-liquid separation device, solid phase waste residue is removed, and the liquid phase of the hydrochloric acid pickling wastewater after deslagging enters ...

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PUM

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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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C07C55/20C07C51/02C07C39/235C07C37/66C01D5/00
CPCY02P20/129
Inventor 王雅琼陈新雨张小兴孙剑许文林
Owner YANGZHOU UNIV
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