Method for synthesizing monopalmitoyl glyceride

A technology of glyceryl palmitate and a synthesis method, which is applied in the field of fine chemical production, can solve the problems of poor miscibility of glycerol monopalmitate and palm oil, high reaction requirements, influence on the reaction, etc., so as to improve the reaction conversion rate, product The effect of high purity and improved reaction conversion rate

Inactive Publication Date: 2019-06-18
佳力士添加剂(海安)有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

The existing synthetic methods of glycerol monopalmitate generally have the disadvantages of high reaction requirements and high cost
[0003

Method used

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  • Method for synthesizing monopalmitoyl glyceride

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[0023] This case proposes a kind of synthetic method of glycerol monopalmitate, wherein, comprises the following steps:

[0024] 1) Add palm oil and glycerin into the first reactor, stir for 30-60 minutes to fully mix the palm oil and glycerin, and preheat to 100-120°C to obtain the first mixture;

[0025] 2) adding 0.4-0.6% catalyst and 0.2-0.5% phase transfer agent, heating to 200-220° C. and stirring for 3-5 hours to obtain the second mixture;

[0026] 3) adjusting the pH of the second mixture to 5.5-6.5, cooling to 20-30° C., and centrifuging to separate the layers to obtain the crude monopalmitin in the upper layer, and centrifuging to separate the residual glycerol, catalyst, phase transfer agent and by-products in the lower layer;

[0027] 4) distilling the crude monopalmitin to obtain the monopalmitin.

[0028] As yet another embodiment of the present case, wherein, step 1) the mass ratio of palm oil and glycerin is 1:2-4. The raw material ratio of palm oil and glyce...

Embodiment 1

[0040] A kind of synthetic method of glycerol monopalmitate, comprises the following steps:

[0041] 1) Add palm oil and glycerin to the first reactor at a mass ratio of 1:2, and add tert-butanol, stir for 30 minutes to fully mix palm oil and glycerin, the mixing speed is 120r / min; and preheat to 100 °C, to obtain the first mixture;

[0042] 2) Add 0.4% catalyst and 0.2% phase transfer agent, heat to 200°C and stir for 3h, the stirring speed is 120r / min, to obtain the second mixture; wherein the catalyst includes 5 parts by weight of cerium phosphate and 1 part by weight of trioxide Diantimony; the phase transfer agent includes 8 parts by weight of tetrabutylammonium bromide and the cyclodextrin of 2 parts by weight;

[0043] 3) Adjust the pH of the second mixture to 5.5-6.5, cool to 20°C, and centrifuge the layers at a centrifugal speed of 3000r / min for 5 minutes to obtain the crude product of glycerol monopalmitate in the upper layer, and centrifuge to separate the residual...

Embodiment 2

[0046] A kind of synthetic method of glycerol monopalmitate, comprises the following steps:

[0047]1) Add palm oil and glycerin to the first reactor, the mass ratio of palm oil and glycerin is 1:3, and add tert-butanol, stir for 50min to fully mix palm oil and glycerin, the stirring speed is 200r / min, and preheated to 110°C to obtain the first mixture;

[0048] 2) Add 0.5% catalyst and 0.3% phase transfer agent, heat to 200° C. and stir for 4 hours at a stirring speed of 200 r / min to obtain a second mixture; the catalyst includes 6 parts by weight of cerium phosphate and 2 parts by weight of dioxygen trioxide Antimony; Phase transfer agent comprises the tetrabutylammonium bromide of 9 parts by weight and the cyclodextrin of 3 parts by weight;

[0049] 3) Adjust the pH of the second mixture to 5.5-6.5, cool to 20-30°C, and centrifuge to separate the layers at a centrifugal speed of 4000-5000r / min for 7 minutes to obtain the crude product of glyceryl monopalmitate in the upper...

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Abstract

The invention discloses a method for synthesizing monopalmitoyl glyceride. The method comprises the following steps: 1) adding palm oil and glycerol into a first reactor, fully and uniformly stirring,and preheating to the temperature of 100-120 DEG C to obtain a first mixture; 2) adding a catalyst and a phase transfer agent, heating to the temperature of 200-220 DEG C, and stirring and reacting to obtain a second mixture; 3) adjusting the pH value of the second mixture, cooling, and centrifuging and layering to obtain an upper-layer monopalmitoyl glyceride crude product; and 4) distilling themonopalmitoyl glyceride crude product to obtain the monopalmitoyl glyceride. According to the method for synthesizing the monopalmitoyl glyceride, cerium phosphate and antimony trioxide cooperativelyserve as the catalyst, tetrabutylammonium bromide and cyclodextrin are used as the phase transfer agent, the reaction conversion rate of the prepared monopalmitoyl glyceride is remarkably improved, the product purity is high, the product purity reaches 94.2% or above, the conversion rate reaches 64.2% or above, and the method has a good industrial application prospect.

Description

technical field [0001] The invention relates to the field of fine chemical production, in particular to a method for synthesizing glycerol monopalmitate. Background technique [0002] Glyceryl monopalmitate is a non-ionic surfactant with excellent properties such as emulsification, lubrication, softness and wetting, and is non-toxic. It is widely used as an emulsifier in food processing and cosmetics. At present, the industrial synthesis of glycerol monopalmitate mainly adopts chemical methods, including direct esterification, glycerol hydrolysis and oil hydrolysis, among which the glycerolysis reaction of tallow or other natural oils is the most widely used. The existing methods for synthesizing glycerol monopalmitate generally have the disadvantages of high reaction requirements and high cost. [0003] Glycerol monopalmitate is generally poor in miscibility between glycerin and palm oil, so it will affect the progress of the reaction to a certain extent. Phase transfer a...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/30
Inventor 孙敬章
Owner 佳力士添加剂(海安)有限公司
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