Preparation method of glycerin monostearate alpha crystal

A technology of glycerol monostearate and crystals, which is applied in the chemical field, can solve problems such as agglomeration of finished products, hot hands, and melting in the center of packaging, and achieve the effects of high product quality, high process controllability, and cost savings

Active Publication Date: 2013-03-27
GUANGZHOU CARDLO BIOCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the glyceryl monostearate is turned into a granular finished product by pressure spraying, there will be a process of crystal transformation during storage. When the crystal transformation occurs, heat will be released. In summer, if the produced glycerol monostearate is directly When the ester is packaged well, when the crystal transformation occurs, the highest temperature will reach between 50 and 56 degrees, it will feel hot, and the center of the package will appear in a molten state. Generally, the melting point of glyceryl monostearate with different contents is in the range of 63 to 66 degrees. After the end of this process, glyceryl monostearate is gradually cooled, and the finished product of glyceryl monostearate will be seriously agglomerated, which seriously affects the quality of the product, and it is impossible to obtain glyceryl monostearate with a higher content of α crystals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0055] 1) Preparation of crude glyceryl monostearate

[0056] Step 1) Preparation of glyceryl monostearate crude product:

[0057] 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;

[0058] 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;

[0059] 2) Neutralization treatment

[0060] 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

[0080] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0081] 1) Preparation of crude glyceryl monostearate

[0082] Step 1) Preparation of glyceryl monostearate crude product:

[0083] 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;

[0084] 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;

[0085] 2) Neutralization treatment

[0086] 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

[0106] Prepare high-quality glyceryl monostearate, and concrete process is as follows:

[0107] 1) Preparation of crude glyceryl monostearate

[0108] Step 1) Preparation of glyceryl monostearate crude product:

[0109] 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;

[0110]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;

[0111] 2) Neutralization treatment

[0112] 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 discharg...

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Abstract

The invention discloses a preparation method of glycerin monostearate alpha crystal. The method comprises the steps of enabling material hydrogenated palm oil and glycerol to react to generate crude monoglyceride under alkali catalysis, and then carrying out four-stage distillation to obtain the high-quality glycerin monostearate alpha crystal, wherein the content exceeds 90%. The acid value of the product disclosed by the invention is reduced to below 0.4; the freezing point is increased to 64-66 DEG C; the quality of the product is improved, and the difficult point of the prior art is overcome. Meanwhile, slag block of a pipe generated in the distillation process and the problems of disconnected production and low treatment efficiency caused by scale formation of an evaporating surface in an early technology are completely eradicated by the preparation method; and recovered glycerin and intermediate materials can be recycled. Therefore, the preparation method is low in cost, high in yield, high in controllability of the entire process, and suitable for industrial production.

Description

technical field [0001] The invention relates to the field of chemistry, and in particular to a preparation method of glyceryl monostearate alpha crystal. Background technique [0002] Glyceryl monostearate is a nonionic surfactant. It has both hydrophilic and lipophilic genes, and has multiple functions such as wetting, emulsifying, and foaming. [0003] Glyceryl monostearate is an emulsifier and additive for food; it is used as an emulsifier in cosmetics and pharmaceutical ointments to make the paste delicate and smooth; it is used as an emulsifier for industrial silk oils and a lubricant for textiles; in plastic films Used as a dripping agent and anti-fogging agent; as a lubricant and antistatic agent in plastic processing, and as a defoamer, dispersant, thickener, wetting agent, etc. in other aspects. [0004] Its preparation is usually divided into chemical method and biological method, and the chemical method has the following ways: [0005] (1) Obtained by esterific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/30C07C67/08C07C67/48
Inventor 徐怀义严春
Owner GUANGZHOU CARDLO BIOCHEM TECH
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