Adsorption purification process of crude glycerol

A technology of crude glycerol and glycerol, applied in the field of adsorption and purification technology of crude glycerol, can solve the problems of high distillation temperature, no relevant reports and studies, and high production costs

Inactive Publication Date: 2017-06-13
天长市康宁甘油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the purification of glycerin mostly adopts vacuum distillation, most of which involve molecular still (110°C / 30Pa) or vacuum distillation of glycerin (170-200°C / 2-4kPa), the required distillation temperature is high, High requirements on equipment, high energy consumption, high production cost, and all of them are only aimed at the removal of fatty acids and inorganic salts in crude glycerin, but there is no relevant report on the removal of organic salts and their oligomers in glycerin and research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An adsorption purification process for crude glycerin includes the following steps:

[0025] S1. Dilute the crude glycerin with deionized water to a water content of 10% by weight, then heat it to 40°C, then add a high-efficiency adsorbent of 0.1% by weight based on the crude glycerin, stir for 60 minutes, then stand and filter to obtain purified glycerin. Product

[0026] S2. Continue to dilute the purified glycerol obtained from S1 to a water content of 45% by weight, and then pass through a 717 strongly basic anion exchange resin column with a flow rate of 2.3 mL / min and a resin column operating temperature of 30°C, and then pass through 732 Type strongly acidic cation exchange resin column with a flow rate of 2.7 mL / min and a resin column operating temperature of 60°C to obtain semi-finished products of purified glycerin;

[0027] S3. The semi-finished product of purified glycerin obtained from S2 is first depressurized to a vacuum of 10.0kPa, then heated to 100°C for vac...

Embodiment 2

[0030] An adsorption purification process for crude glycerin includes the following steps:

[0031] S1. Dilute the crude glycerin with deionized water to a water content of 30% by weight, then heat it to 30°C, then add a 5% by weight high-efficiency adsorbent based on the crude glycerin, stir for 30 minutes, then stand still and filter to obtain the purified glycerin ;

[0032] S2. Continue to dilute the purified glycerin obtained from S1 to a water content of 55wt%, and then pass through a 717 strongly basic anion exchange resin column with a flow rate of 2.1 mL / min and a resin column operating temperature of 50°C. Type strongly acidic cation exchange resin column with a flow rate of 2.5 mL / min and a resin column operating temperature of 80°C to obtain semi-finished purified glycerin;

[0033] S3. The semi-finished product of purified glycerin obtained from S2 is first depressurized to a vacuum of 6.0kPa, then heated to 120°C for vacuum distillation and dehydration, and then heated...

Embodiment 3

[0036] An adsorption purification process for crude glycerin includes the following steps:

[0037] S1. Dilute the crude glycerin with deionized water to a water content of 20% by weight, then heat to 35°C, then add 2% by weight high-efficiency adsorbent based on the crude glycerin, stir for 45 minutes and then stand and filter to obtain the purified glycerin ;

[0038] S2. Continue to dilute the purified glycerin obtained from S1 to a water content of 50wt%, and then pass through a 717 strongly basic anion exchange resin column with a flow rate of 2.2 mL / min and a resin column operating temperature of 40°C. Type strongly acidic cation exchange resin column with a flow rate of 2.6 mL / min and a resin column operating temperature of 70°C to obtain semi-finished products of purified glycerin;

[0039] S3. The semi-finished product of purified glycerin obtained from S2 is first decompressed to a vacuum of 8.0kPa, then heated to 110°C for vacuum distillation and dehydration, and then hea...

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PUM

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Abstract

The invention discloses an adsorption purification process of crude glycerol. The adsorption purification process comprises the following steps: adding water into the crude glycerol for diluting; adding an efficient adsorbent for carrying out adsorption treatment; after filtering, carrying out ion exchange treatment through an alkaline ion exchange resin column and an acidic ion exchange resin column in sequence; decompressing, distilling and dehydrating; de-coloring with active carbon to obtain a purified glycerol finished product. A method for preparing the purified glycerol finished product comprises the following steps: after roasting bentonite and medical stones; adding water for uniformly dispersing; adding silica sol, organic amine and sodium metaaluminate, and uniformly dispersing with ultrasounds; putting a mixture into a closed container and raising the temperature to 160 DEG C to 190 DEG C to carry out hydrothermal reaction; after cooling, filtering to remove a mother solution; adding a sodium tartrate solution and uniformly mixing to obtain a product. The adsorption purification process of the crude glycerol, provided by the invention, can be used for effectively removing salt in the crude glycerol and impurities of oligomers; a glycerol finished product with the purity of 99.5 percent or more is obtained; the production cost can be reduced and energy sources and resources are saved.

Description

Technical field [0001] The invention relates to the technical field of glycerol purification, in particular to an adsorption purification process of crude glycerol. Background technique [0002] Glycerin is the main by-product of biodiesel and an important basic organic raw material. It is widely used in industry, medicine and daily life. There are also reports on the preparation of hydrogen from crude glycerol abroad. The supply of glycerin in my country has been in short supply, especially high-purity (above 99.5%) glycerin is almost entirely imported. In recent years, with the continuous in-depth research of biodiesel preparation technology and the realization of industrialization, it is important to co-produce high-purity natural glycerin while developing biodiesel. [0003] In the prior art, vacuum distillation is mostly used to purify glycerol, most of which involve molecular distillation (110°C / 30Pa) or vacuum distillation of glycerol (170-200°C / 2-4kPa), which requires hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/22C07C29/76C07C29/74B01J20/22B01J20/30
CPCB01J20/046B01J20/10B01J20/103B01J20/16B01J20/22C07C29/74C07C29/76C07C31/225
Inventor 祁建兵
Owner 天长市康宁甘油科技有限公司
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