Production method for zinc undecylenate

A technology of zinc alkenoate and alkenoic acid, applied in the preparation of carboxylate, organic chemistry, etc., can solve the problems of incomplete reaction, non-conformity, uneven thickness of finished products, etc., and achieves obvious reaction end point, loose reaction conditions, and post-treatment. simple effect

Active Publication Date: 2012-04-18
广西两面针亿康药业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weak point of its existence is: A, method (1) raw material zinc oxide is the white powder that is insoluble in water and ethanol, and this reaction is solid-liquid phase reaction, and the undecylenic acid zinc that generates is insoluble in ethanol and water. White powder, the reaction end point is difficult to control, the zinc undecylenate white powder generated during the reaction is often entrained and wrapped with more unreacted zinc oxide and undecylenic acid, which makes the reaction incomplete, and post-processing washing and drying are more difficult , the zinc undecylenate powder that obtains is coarser, and the finished product outward appearance is not uniform white fine and smooth, and the finished product is uneven in thickness, and there are some lumps, cause when making medicine and skin care cosmetics, drug distribution is

Method used

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  • Production method for zinc undecylenate
  • Production method for zinc undecylenate
  • Production method for zinc undecylenate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] Ingredient ratio:

[0043] Zinc oxide: glacial acetic acid: water = 1: 1.5: 8 (W / W)

[0044] Undecylenic acid: ethanol = 1:1 (W / W)

[0045] According to the ratio of zinc oxide: glacial acetic acid: water=1:1.5:8, 70.4kg of purified water, 13.2kg of glacial acetic acid, and 8.8kg of zinc oxide were put into the reaction tank, and heated to 80~100℃ under stirring. After the zinc oxide is completely dissolved in 1 hour, the zinc acetate aqueous solution is filtered to obtain a colorless and transparent zinc acetate solution for use. Accurately weigh 40 kg of refined undecylenic acid with a content of 96.0% and put it into the reaction tank, then add 40 kg of ethanol with a content of 95% in a weight ratio of undecylenic acid: ethanol = 1:1, stir well, and heat to 70°C , Obtain a clear and transparent ethanol solution of undecylenic acid for use. Add the undecylenic acid ethanol solution slowly to the zinc acetate solution prepared above under stirring. The a...

Example Embodiment

[0046] Example 2

[0047] Ingredient ratio:

[0048] Zinc oxide: glacial acetic acid: water = 1: 1.6: 8 (W / W)

[0049] Undecylenic acid: ethanol = 1: 2 (W / W)

[0050] Accurately weigh 9.2 kg of zinc oxide according to the ingredient ratio, and then add 70.4 kg of purified water, 14.72 kg of glacial acetic acid, and 9.2 kg of zinc oxide into the reaction tank according to the ingredient ratio of zinc oxide: glacial acetic acid: water = 1:1.5: 8. Heat to 80-100° C. with stirring, and react for 1.5 hours to completely dissolve the zinc oxide, and then filter the zinc acetate aqueous solution to obtain a colorless and transparent zinc acetate solution for use. Accurately weigh 40.0 kg of refined undecylenic acid with a content of 96.0% and put it into the reaction tank, then add 80 kg of ethanol with a content of 80% in a weight ratio of undecylenic acid: ethanol = 1:2, fully stir, and heat to 70 ℃, a clear and transparent ethanol solution of undecylenic acid was obtained for use. Add ...

Example Embodiment

[0051] Example 3

[0052] Ingredient ratio:

[0053] Zinc oxide: glacial acetic acid: water = 1:1.7:8 (W / W)

[0054] Undecylenic acid: ethanol = 1:4 (W / W)

[0055] Accurately weigh 9.6 kg of zinc oxide according to the proportion of ingredients. Then according to the ratio of zinc oxide: glacial acetic acid: water = 1:1.7:8, 70.4kg of purified water, 16.32kg of glacial acetic acid, and 9.6kg of zinc oxide were put into the reaction tank, and heated to 80-100℃ under stirring. After reacting for 2 hours to completely dissolve the zinc oxide, the zinc acetate aqueous solution is filtered to obtain a colorless and transparent zinc acetate solution for use. Accurately weigh 40.0 kg of refined undecylenic acid with a content of 96.0% and put it into the reaction tank, then add 160 kg of ethanol with a content of 80% at a weight ratio of undecylenic acid: ethanol = 1:2, stir well, and heat to 70 ℃, a clear and transparent ethanol solution of undecylenic acid was obtained for use. Add the...

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Abstract

The invention discloses a production method for zinc undecylenate. The production method comprises the following steps: adding glacial acetic acid and zinc oxide into purified water, thereby preparing a zinc acetate aqueous solution; dropwise adding an undecylenate ethanol solution into the zinc acetate aqueous solution; heating, keeping the temperature at 40-80 DEG C, and reacting for 1-2 hours; and filtering, washing, crushing and drying, thereby obtaining a white or light yellow powder zinc undecylenate product.

Description

technical field [0001] The invention relates to a production method of zinc undecylenate, in particular to a production method of high-quality zinc undecylenate. Background technique [0002] Zinc undecylenate, pinyin name: Shiyixisuanxin, English name: Zinc Undecylenate, molecular formula C 22 h 38 o 4 , structural formula [CH 2 =CH(CH 2 ) 8 COO] 2 Zn, molecular weight 431.92. The melting point is 116-121°C. Properties: white or light yellow amorphous powder. Almost insoluble in water and ethanol. In case of strong acid, it can be decomposed into undecylenic acid and corresponding zinc salt. Uses: 1. Anionic surfactant; especially as a co-emulsifier for cream cosmetics; 2. It can also be used as an emulsifier and bactericide, such as a bactericide for various cosmetics and soaps. 3. Used in medicine, antifungal drugs, and treatment of skin diseases caused by fungi. [0003] [0004] For 10-undecylenic acid zinc salt. Contains C 22 h 38 o 4 Zn should be 98...

Claims

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Application Information

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IPC IPC(8): C07C57/03C07C51/41
Inventor 覃旭何政剑冷承先韦宾黄敬洲徐岸玲梁燕萍
Owner 广西两面针亿康药业股份有限公司
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