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A kind of sodium acetate preparation method and its energy-saving preparation system

A preparation system, sodium acetate technology, applied in the field of sodium acetate production, can solve the problem of purchasing acetic acid raw materials

Active Publication Date: 2021-08-20
杭州华环化工设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, this principle is generally used to produce sodium acetate, but the acetic acid raw material needs to be purchased

Method used

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  • A kind of sodium acetate preparation method and its energy-saving preparation system
  • A kind of sodium acetate preparation method and its energy-saving preparation system
  • A kind of sodium acetate preparation method and its energy-saving preparation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] refer to figure 2 , an energy-saving preparation system for preparing sodium acetate, comprising a bag filter, a neutralization reactor 1, a filter 2, a concentration reactor 3, a crystallization tank 4 and a separator 5 connected in sequence, and the communication pipelines between the above components are all set The delivery pump, that is, the acetic acid wastewater enters the neutralization reactor 1 after being filtered by the cloth bag filter, and caustic soda is added dropwise in the neutralization reactor 1 to enter the neutralization reaction, and the reacted reaction liquid passes through the filter 2 to filter impurities and then enters the concentration reactor In 3, the concentrated mother liquor after concentration enters crystallization tank 4 to carry out crystallization, and the mixed solution after crystallization completes enters separator 5, and separator 5 separates crystal and mother liquor, and the liquid outlet of pump described separator 5 and c...

Embodiment 2

[0066] refer to figure 1 , a preparation method of sodium acetate, is characterized in that, comprises the following steps:

[0067] S1: Filter the acetic acid wastewater to remove impurities in the acetic acid wastewater, and use a cloth bag filter as the filter;

[0068] S2: neutralize the filtered acetic acid wastewater and caustic soda, measure the content of acetic acid in the acetic acid wastewater, determine the quality of caustic soda, and control the temperature of the neutralization reaction at 60°C. The specific process is that caustic soda is slowly added dropwise to the acetic acid wastewater, which can fully react the relatively high-cost caustic soda, and at the same time avoid the occurrence of side reactions caused by excessive caustic soda; after the dropwise addition, keep the acetic acid wastewater The mass of acetic acid is 5% more than that of caustic soda.

[0069] S3: when the pH value of the reaction liquid of the neutralization reaction is 7.5, filt...

Embodiment 3

[0075] refer to figure 1 , a preparation method of sodium acetate, is characterized in that, comprises the following steps:

[0076] S1: Filter the acetic acid wastewater to remove impurities in the acetic acid wastewater, and use a cloth bag filter as the filter;

[0077] S2: neutralize the filtered acetic acid wastewater and caustic soda, measure the content of acetic acid in the acetic acid wastewater, determine the quality of caustic soda, and control the temperature of the neutralization reaction at 55°C. The specific process is that caustic soda is slowly added dropwise to the acetic acid wastewater, which can fully react the relatively high-cost caustic soda, and at the same time avoid the occurrence of side reactions caused by excessive caustic soda; after the dropwise addition, keep the acetic acid wastewater The mass of acetic acid is 6% more than that of caustic soda.

[0078] S3: when the pH value of the reaction solution of the neutralization reaction is 7.6, fi...

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Abstract

The invention discloses a sodium acetate preparation method and an energy-saving preparation system thereof. The sodium acetate preparation method comprises the following steps: filtering acetic acid waste water; neutralizing the filtered acetic acid waste water and caustic soda; Filtrate to obtain the filtrate; evaporate and concentrate the filtrate to obtain a concentrated mother liquor; carry out crystallization treatment on the concentrated mother liquor, and separate the crystal and the mother liquor by a centrifuge to obtain sodium acetate crystals, which are used as raw materials in the preparation method of sodium acetate in the present invention It is acetic acid waste water, product raw material cost is low, and technological process is simple, so product cost is low, and has reduced the discharge of acetic acid waste water, has good economic value and social value; Heat and heat absorption process, preheating and precooling water, which is beneficial to the comprehensive utilization of energy and saves preparation energy.

Description

technical field [0001] The invention relates to the technical field of sodium acetate production, in particular to a sodium acetate preparation method and an energy-saving preparation system thereof. Background technique [0002] In the production of glacial acetic acid, due to distillation and concentration in the refining process of acetic acid, a certain amount of acetic acid wastewater will be produced. The substances contained in acetic acid wastewater mainly include acetic acid, formic acid, acetaldehyde, miscellaneous fats and other substances. Generally, the total acid content in acetic acid wastewater is about 33% (of which the acetic acid content is about 30%, and the formic acid content is about 30%. 3%), there is also acetaldehyde, miscellaneous fat and other organic impurities, and water accounts for about 66%. In most glacial acetic acid production plants, acetic acid wastewater is discharged directly as one of the three industrial wastes. As a result, the pH...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C51/43C07C53/10
CPCC07C51/412C07C51/43C07C53/10
Inventor 蒋其明钱春龙李爱红
Owner 杭州华环化工设备有限公司