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A kind of synthetic method of polyhydroxystearate

A technology of polyhydroxystearate and polyhydroxystearic acid, which is applied in the direction of carboxylate preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the problem of environmental pollution and 9,10-dihydroxystearic acid Post-processing complex, corrosive and other problems, to achieve the effect of expanding production capacity, shortening residence time, weakening corrosion and toxicity

Active Publication Date: 2016-08-24
ZHEJIANG TRANSFAR WHYYON CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above two methods for synthesizing 9,10-dihydroxystearic acid use formic acid as an organic acid, which is highly corrosive and not environmentally friendly; in addition, the second alkaline method for preparing 9,10-dihydroxystearic acid Processing is more complicated

Method used

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  • A kind of synthetic method of polyhydroxystearate
  • A kind of synthetic method of polyhydroxystearate
  • A kind of synthetic method of polyhydroxystearate

Examples

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Embodiment 1

[0030] Embodiment 1: the preparation method of dihydroxystearic acid

[0031] Add 11.3g of oleic acid, 16.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly dropwise add 30% by mass fraction to the system at room temperature 12.0 g of hydrogen peroxide was heated up to 55° C., and reacted for 6 hours under vigorous stirring. After the reaction was completed, it was suction filtered, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid which was dihydroxystearic acid, with a melting point of 92-96° C. and a yield of 97%. Take the product for infrared spectroscopy detection, such as figure 1 As shown, the result is displayed at 3400cm -1 There is a relatively obvious peak at , which is attributed to the hydroxyl functional group in the molecular structure, so it can be judged that the hydroxyl func...

Embodiment 2

[0032]Embodiment 2: the preparation method of tetrahydroxystearic acid

[0033] Add 11.0g of linoleic acid, 24.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly add 30% by mass fraction to the system at room temperature. % hydrogen peroxide 24.0g, heated up to 55°C, and reacted for 6 hours under vigorous stirring. After the reaction was completed, it was filtered with suction, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid, namely tetrahydroxystearic acid, with a yield of 79.3%.

Embodiment 3

[0034] Embodiment 3: the preparation method of hexahydroxystearic acid

[0035] Add 10.8g of linolenic acid, 36.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly dropwise add 30% by mass fraction to the system at room temperature 36.0 g of hydrogen peroxide was heated up to 60° C., and reacted for 6 hours under vigorous stirring. After the reaction was finished, it was suction filtered, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid which was hexahydroxystearic acid with a yield of 61.5%.

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Abstract

The invention discloses a synthesis method of polyhydroxy stearate and application of the polyhydroxy stearate in PVC (polyvinyl chloride) resin heat stabilizers. The existing alkaline process for preparing 9,10-bis-hydroxystearic acid is complex in after-treatment, and no one has applied bis-hydroxystearate to PVC heat stabilizers. The invention is characterized in that in the polyhydroxy stearic acid synthesis, fatty acid, acetic acid and 40 wt% hydrochloric acid are added into the reaction vessel, wherein the fatty acid is one or mixture of more of oleic acid, linoleic acid and linolenic acid; in the system, the mass ratio of fatty acid to anhydrous acetic acid 30% to oxydol is 1:(0.5-2):(1-3.5); and in the reaction system, the mass ratio of anhydrous acetic acid to water is 1:(2.0-3.0). In the synthesis method, the product can be directly precipitated from the system, thereby simplifying the after-treatment.

Description

technical field [0001] The invention relates to the field of heat stabilizers for PVC resins, in particular to a method for synthesizing polyhydroxystearate. Background technique [0002] Among plastics, polyvinyl chloride (PVC) is one of the five general-purpose plastics in the world. Globally, the demand for PVC resin ranks third after polyethylene and polypropylene; while its consumption in China has risen to the third one. In recent years, rising oil prices have created a lot of room for development of China's acetylene-based PVC. [0003] PVC products can be divided into hard, semi-rigid and soft products according to whether plasticizers are added and the amount of additives, so PVC can be widely used in construction, toys, electrical appliances, packaging and other industries. [0004] However, due to its structural defects, PVC will remove HCl when it is heated to about 100°C, and at the usual plastic processing temperature (100-200°C), in addition to removing HCl,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C59/105C08K5/098C08L27/06
CPCC07C51/367C07C51/412C08K5/098C08L2201/08C07C59/105C08L27/06
Inventor 杨静晏苏学王华周潭莉莉钟健
Owner ZHEJIANG TRANSFAR WHYYON CHEM
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