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A kind of purification production process of glycerin

A production process and technology of glycerin, which is applied in the field of purification production process of glycerin, can solve problems such as unsatisfactory production and application, difficulty in removing impurities, decolorization and concentration and purification of crude glycerin, and achieve complete decolorization, shortened purification time, and fast distillation speed Effect

Active Publication Date: 2016-07-13
TIANCHANG KANGNING PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Glycerin is one of the important chemical raw materials. It has excellent solubility and wetting properties. It is widely used in medicine, food, cosmetics, chemical industry and other industries. The glycerol content in crude glycerin is generally about 70-80%. Decolorization and concentration and purification are very difficult and cannot meet most production applications. Today, when advocating green, environmental protection, and waste recycling, the concentration and purification treatment technology of crude glycerin is getting more and more attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of purification production process of glycerin that present embodiment proposes, comprises the steps:

[0014] S1. Inhale crude glycerin into the distillation kettle through vacuum, turn on the boiler heating system for heating, start the steam generator, and control the steam pressure at 0.45MPa; when the temperature of crude glycerin rises to 164°C, direct steam is passed through, and the direct steam enters The volume is controlled so that the vacuum of the system is not less than 0.08MPa, and the glycerin vapor obtained within the time period of 0-T1 is passed into the distillation kettle for redistillation;

[0015] S2. The glycerol vapor obtained in the distillation of S1 is successively passed through the first condenser, the second condenser, the third condenser and the fourth condenser to cool down and condense to obtain distilled glycerin. The cooling water temperature of the first condenser is controlled at 159°C , the temperature of the glycerin vapor...

Embodiment 2

[0018] A kind of purification production process of glycerin that present embodiment proposes, comprises the steps:

[0019] S1. Inhale crude glycerin into the distillation kettle through vacuum, turn on the boiler heating system for heating, start the steam generator, and control the steam pressure at 0.35MPa; when the temperature of crude glycerin rises to 165°C, direct steam is passed through, and the direct steam enters The volume is controlled so that the vacuum of the system is not less than 0.088MPa, and the glycerol vapor obtained within the time period of 0-T1 is passed into the distillation kettle for redistillation;

[0020] S2. The glycerol vapor obtained in the distillation of S1 is successively cooled and condensed through the first condenser, the second condenser, the third condenser and the fourth condenser to obtain distilled glycerin, and the cooling water temperature of the first condenser is controlled at 158°C , the temperature of the glycerin vapor at the...

Embodiment 3

[0023] A kind of purification production process of glycerin that present embodiment proposes, comprises the steps:

[0024] S1. Inhale crude glycerin into the distillation kettle through vacuum, turn on the boiler heating system for heating, start the steam generator, and control the steam pressure at 0.4MPa; when the temperature of crude glycerin rises to 155°C, direct steam is passed through, and the direct steam enters The volume is controlled so that the vacuum of the system is not less than 0.091MPa, and the glycerin vapor obtained within the time period of 0-T1 is passed into the distillation kettle for redistillation;

[0025] S2. The glycerol vapor obtained in the distillation of S1 is successively passed through the first condenser, the second condenser, the third condenser and the fourth condenser to cool down and condense to obtain distilled glycerin. The cooling water temperature of the first condenser is controlled at 160°C , the temperature of the glycerin vapor...

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Abstract

The invention discloses a purification production process of glycerol. The process comprises the steps as follows: crude glycerol is sucked into a distillation still, direct steam is fed when the crude glycerol is heated to the temperature of 160+ / -5 DEG C, and theintake amount of the direct steam is controlled to the extent that system vacuum is not lower than 0.08-0.095 MPa; glycerol steam obtained during distillation sequentially passes through a first condenser, a second condenser, a third condenser and a fourth condenser for cooling condensation to obtain distilled glycerol; the weight of the distilled glycerol is M, the distilled glycerol is input into a decoloration tank and heated to the temperature of 90+ / -5 DEG C, then activated carbon is added, the weight of the activated carbon is M*(0.1%-0.5%), the distilled glycerol is fully stirred for 25-35 min, the temperature is kept for 0.5-1.5 h, the glycerol is obtained through filtration, and the filtration pressure is lower than 0.4 MPa. The purification production process of the glycerol is simple in process and thorough in purification process, and the obtained glycerol contains few impurities and is high in yield.

Description

technical field [0001] The invention relates to the technical field of glycerin purification, in particular to a glycerin purification production process. Background technique [0002] Glycerin is one of the important chemical raw materials. It has excellent solubility and wetting properties. It is widely used in medicine, food, cosmetics, chemical industry and other industries. The glycerol content in crude glycerin is generally about 70-80%. Decolorization and concentration and purification are very difficult and cannot meet most production applications. Today, when advocating green, environmental protection, and waste recycling, the concentration and purification treatment technology of crude glycerin has attracted more and more attention. Contents of the invention [0003] Based on the technical problems existing in the background technology, the object of the present invention is to propose a glycerin purification production process, which is simple in process, conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/22C07C29/76
CPCC07C29/76C07C29/80C07C31/225
Inventor 祁建兵
Owner TIANCHANG KANGNING PLASTIC TECH
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