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Preparation method of high-quality glycerin monostearate

A high-quality technology of glycerol monostearate, applied in the preparation of carboxylate, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of high processing cost, long reaction time, low yield, etc. The effect of easy separation, high product quality and high yield

Active Publication Date: 2013-03-13
GUANGZHOU CARDLO BIOCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process yield is low and the cost is high
[0016] Biological principles Enzymatic synthesis of glycerol monostearate is the use of lipase as an efficient biocatalyst (Peng Lifeng. Food Science [J], 1999, 04), the product not only has high stereoselectivity and regiospecificity , can synthesize optically pure products that are difficult to synthesize by chemical methods, but the reaction time is long, generally more than 10 hours, and the follow-up processing costs are relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0052] 1) Preparation of crude glyceryl monostearate

[0053] Step 1) Preparation of glyceryl monostearate crude product:

[0054] First, 122kg of glycerin was added into the esterification reaction tank, then 0.6kg of sodium hydroxide was slowly added into the esterification reaction tank, then the temperature was raised to 90 degrees Celsius, and stirred for 30 minutes;

[0055] Next, join 500kg liquid hydrogenated palm oil in the above-mentioned esterification reaction tank, fully stir and mix, be warmed up to T 0 The temperature is 210°C, the control pressure P is -0.06Mpa, and the esterification reaction is carried out for 30 minutes to obtain the crude product of glycerol monostearate;

[0056] 2) Neutralization treatment

[0057] Add phosphoric acid to the crude glyceryl monostearate in step 1), adjust the pH to 6.0, stir for 15 minutes, then let it stand for 2 hours and discharg...

Embodiment 2

[0074] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0075] 1) Preparation of crude glyceryl monostearate

[0076] Step 1) Preparation of glyceryl monostearate crude product:

[0077] First, 128kg of glycerin was added into the esterification reaction tank, and then 0.5kg of sodium hydroxide was slowly added into the esterification reaction tank, then the temperature was raised to 90 degrees Celsius, and stirred for 30 minutes;

[0078] Next, join 500kg liquid hydrogenated palm oil in the above-mentioned esterification reaction tank, fully stir and mix, be warmed up to T 0 The temperature is 215°C, the control pressure P is -0.07Mpa, and the esterification reaction is carried out for 30 minutes to obtain the crude product of glycerol monostearate;

[0079] 2) Neutralization treatment

[0080] Add phosphoric acid to the crude glyceryl monostearate in step 1), adjust the pH to 6.5, stir for 15 minutes, then let it stand for 2 hours, then di...

Embodiment 3

[0097] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0098] 1) Preparation of crude glyceryl monostearate

[0099] Step 1) Preparation of glyceryl monostearate crude product:

[0100] First, 135kg of glycerin was added into the esterification reaction tank, then 0.37kg of sodium hydroxide was slowly added into the esterification reaction tank, then the temperature was raised to 90 degrees Celsius, and stirred for 30 minutes;

[0101] Next, join 500kg liquid hydrogenated palm oil in the above-mentioned esterification reaction tank, fully stir and mix, be warmed up to T 0 The temperature is 218°C, the control pressure P is -0.08Mpa, and the esterification reaction is carried out for 30 minutes to obtain the crude product of glycerol monostearate;

[0102] 2) Neutralization treatment

[0103] Add phosphoric acid to the crude glyceryl monostearate in step 1), adjust the pH to 7.0, stir for 15 minutes, then let it stand for 2 hours and dischar...

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Abstract

The invention discloses a preparation method of high-quality glycerin monostearate. The method comprises the steps of reacting hydrogenated palm oil and glycerol under strong base catalysis to generate ester, and carrying out four-stage distillation to obtain high-quality glycerin monostearate. The acid value of the product is reduced to below 0.4, the freezing point is raised to 64-66 DEG C, the quality of the product is improved, and the difficulty of the prior art is overcome. Besides, the problems in the prior art that the pipeline is blocked by slag produced in the distillation process, the production efficiency is lowered, the product quality is reduced, the production is discontinuous and the processing efficiency is low resulting from scaling of an evaporating surface and a condensing surface are solved. Glycerol and hydrogenated palm oil can be recycled, so that the cost is low, the yield is high, the product quality is improved, and the whole processing controllability is high. The high-quality glycerin monostearate is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a method for preparing high-quality glyceryl monostearate. Background technique [0002] Glyceryl monostearate is a white waxy flake, bead or powder solid, soluble in organic solvents such as chloroform, ethanol, acetone or ether, and also soluble in mineral oil, animal and vegetable oil. Insoluble in water, it can be dispersed in hot water by vigorous shaking and mixing with hot water, and can also form a gel with hot water. The HLB value of monoglyceride is between 3 and 4, which belongs to the water-in-oil (W / O) emulsifier. Due to its unique emulsifying properties, it can also be used as an oil-in-water (O / W) emulsifier. my country's national standard "Hygienic Standards for the Use of Food Additives" (GB2760-1996) stipulates that monoglycerides can be used in various foods according to production needs, and the Joint Expert Committee on Food Additives (JECFA) As "no limit",...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/30C07C67/08
Inventor 徐怀义严春
Owner GUANGZHOU CARDLO BIOCHEM TECH
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