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An improved glycerol production process

A production process and technology of glycerin, which is applied in the field of raw material process improvement in light industry, can solve the problems of complicated process and high input cost, and achieve the effects of simple process flow and operation, low input cost and mild reaction conditions.

Active Publication Date: 2018-03-20
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is more cumbersome and the input cost is higher

Method used

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  • An improved glycerol production process

Examples

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Effect test

Embodiment 1

[0028] The crude glycerol solution and fatty acid produced by high-temperature hydrolysis in an oil factory. The crude glycerin solution is a dark gray turbid solution with a saponification value of 0.6-0.7mg / g, pH=4.0, and a glycerin content of 28.7%.

[0029] (1) Pretreatment: Add 0.3% activated carbon (based on the quality of the crude glycerin solution) to the crude glycerin solution, stir for 60 minutes, and filter to obtain a light yellow liquid;

[0030] Regeneration of waste activated carbon: Rinse the waste activated carbon with hot steam until the ultraviolet absorption peak in the eluent no longer changes, and the eluent is returned to the hydrolysis tank for high-temperature hydrolysis to prepare glycerin and fatty acids.

[0031] (2) Resin adsorption:

[0032] ①Column packing: Soak XDA-1 macroporous adsorption resin with ethanol for 4 hours, then pack the column, and elute the ethanol in the resin with clean water.

[0033] ②Column passage: Pass the obtained ligh...

Embodiment 2

[0037] The crude glycerol solution and fatty acid produced by high-temperature hydrolysis in an oil factory. The crude glycerin solution is a dark gray turbid solution with a saponification value of 0.6-0.7mg / g, pH=4.0, and a glycerin content of 28.7%.

[0038] (1) Pretreatment: Add 0.3% activated carbon (based on the quality of the crude glycerin solution) to the crude glycerin solution, stir for 60 minutes, and filter to obtain a light yellow liquid;

[0039] Regeneration of waste activated carbon: Rinse the waste activated carbon with hot steam until the ultraviolet absorption peak in the eluent no longer changes, and the eluent is returned to the hydrolysis tank for high-temperature hydrolysis to prepare glycerin and fatty acids.

[0040] (2) Resin adsorption:

[0041] ①Column packing: Soak HYA-106 macroporous adsorption resin with ethanol for 4 hours, then pack the column, and elute the ethanol in the resin with clean water.

[0042] ②Column passage: Pass the obtained li...

Embodiment 3

[0046] The crude glycerol solution and fatty acid produced by high-temperature hydrolysis in an oil factory. The crude glycerol solution is a dark gray turbid solution with a saponification value of 0.6-0.7, pH=4.0mg / g, and a glycerol content of 28.7%.

[0047] (1) Pretreatment: Add 0.3% activated carbon (based on the quality of the crude glycerin solution) to the crude glycerin solution, stir for 60 minutes, and filter to obtain a light yellow liquid;

[0048] Regeneration of waste activated carbon: Rinse the waste activated carbon with hot steam until the ultraviolet absorption peak in the eluent no longer changes, and the eluent is returned to the hydrolysis tank for high-temperature hydrolysis to prepare glycerin and fatty acids.

[0049] (2) Resin adsorption:

[0050] ①Column packing: Soak HYA-103 macroporous adsorption resin with ethanol for 4 hours, then pack the column, and elute the ethanol in the resin with clean water.

[0051] ②Column passage: Pass the obtained li...

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Abstract

The invention discloses an improved glycerol production technology. Grease is subjected to pyrohydrolysis to obtain a crude glycerol solution and fatty acid; the improved glycerol production technology is characterized in that crude glycerol solution purification comprises the following steps of 1 pretreatment, wherein an adsorbing agent is put into the crude glycerol solution, and reacting under stirring is performed to remove grease impurities in the crude glycerol solution; 2 resin adsorption, wherein filtrate obtained in the step 1 is adsorbed through a macroporous resin adsorption column, and a pure glycerol solution is obtained; 3 glycerol concentration, wherein a glycerol solution obtained in the step 2 is subjected to reduced pressure distillation and concentration and high-temperature evaporation or thin-film evaporation to obtain a glycerol product, and condensate is directly drained or drained after being subjected to biochemical treatment. Eluant obtained after the waste adsorbing agent and the macroporous adsorption resin are regenerated flows back to a hydrolysis kettle to continuously produce glycerol and fatty acid through pyrohydrolysis. According to the improved glycerol production technology, by adopting the macroporous adsorption resin to purify and prepare glycerol, not only is the problem that in a traditional technology, residual calcium blocks pipeline equipment due to the fact that CaO is adopted to neutralize and purify glycerol avoided, but also three wastes generated in a reclamation recycling technology can achieve full utilization of resources.

Description

technical field [0001] The invention relates to the field of light industrial raw material process improvement, in particular to an improved glycerin production process. Background technique [0002] Glycerol, commonly known as glycerin, is an important light chemical raw material widely used in various industries. For example, in the coating industry for the production of alkyd resins and phenolic resins; in the pharmaceutical industry as solvents and lubricants; in the food industry for the manufacture of sweeteners, humectants and monoglycerides; in the tobacco industry as a Solvent and humectant; used in daily chemical industry to make toothpaste, flavor production, etc. Glycerin is also a component of polyether, used in the manufacture of polyurethane foam, and used as a medium and additive in the polymerization of certain monomers in the production of polymers. [0003] According to different sources of raw materials, the industrial production methods of glycerol can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/76C07C31/22
CPCC07C29/76C07C31/225
Inventor 臧阳阳陈磊陈丽娜
Owner ZHEJIANG QICAI ECO TECH CO LTD
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