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Zinc isoocatanoate preparation method

A technology of zinc isooctanoate and isooctanoic acid, which is applied in the field of preparation of zinc isooctanoate, can solve problems such as the inability of zinc content to maintain fluidity at the same time, and achieve the effects of easy industrialization, good technical effect and simple operation process.

Active Publication Date: 2018-11-13
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem that the fluidity cannot be maintained at the same time when the zinc content is high in the prior art, and a new preparation method of zinc isooctanoate is provided, which has the advantages of high zinc content and good fluidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 25g of zinc oxide, 10g of water, 30g of methanol and 150g of solvent toluene into the reaction flask; dropwise add 60g of 99.5% isooctanoic acid to the above mixture, stir at 20-60°C for 1 hour; start adding 20g of propionic acid, and keep The reaction temperature is 60°C; when the pH value is about 9, stop adding propionic acid and add dropwise for 5 hours; heat up, dehydrate, recover the aqueous methanol solution until the temperature of the reaction system is 110°C, cool down, filter, and recover the solvent from the filtrate under reduced pressure, and the remaining liquid That is 74g of zinc isooctanoate, the mass content of zinc is 23%, and the viscosity is 15000mPa s.

Embodiment 2

[0023] Add 31g of zinc hydroxide, 10g of water, 30g of methanol and 150g of solvent toluene into the reaction flask; dropwise add 60g of 99.5% isooctanoic acid to the above mixture, and stir for 1 hour at 20-60°C; start adding 20g of propionic acid, and Keep the reaction temperature at 60°C; when the pH value is about 9, stop adding propionic acid and add it dropwise for 16 hours; heat up, dehydrate, recover methanol aqueous solution until the temperature of the reaction system is 110°C, cool down, filter, and recover the solvent from the filtrate under reduced pressure, and the remaining The liquid is 76g of zinc isooctanoate, the mass content of zinc is 22%, and the viscosity is 14000mPa s.

Embodiment 3

[0025] Add 20g of zinc oxide, 10g of water, 30g of methanol and 150g of solvent toluene into the reaction flask; dropwise add 60g of 99.5% isooctanoic acid to the above mixture, stir at 20-60°C for 1 hour; start to pass 20g of carbon dioxide, and keep the reaction The temperature is 60°C; when the pH value is about 9, the carbon dioxide is stopped and passed for 20 hours; the temperature is raised, dehydrated, and the aqueous methanol solution is recovered until the temperature of the reaction system is 110°C, the temperature is lowered, filtered, and the filtrate is reduced in pressure to recover the solvent, and the remaining liquid is Zinc isooctanoate 72g, zinc mass content is 21%, viscosity 12000mPa s.

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Abstract

The invention relates to a zinc isoocatanoate preparation method. The problem that in the prior art, when the zinc content is higher, the mobility of zinc isoocatanoate cannot be maintained at the same time is mainly solved. The zinc isoocatanoate preparation method comprises the following steps that 1, an alkaline zinc compound, water, alcohols and organic solvents are added into a reaction bulb;isocaprylic acid is added into mixed liquid dropwise, and stirring is conducted at 20-60 DEG C for 0.1-2 hours; auxiliary acid is added, and meanwhile, the reaction temperature is maintained at 20-120 DEG C; when the pH value is 7-10, adding of auxiliary acid is stopped; 2, heating and dehydration are conducted, water, the low-boiling point alcohol or low-boiling point organic solvent aqueous solutions are recovered, cooling and filtering are conducted, filtering liquid is subjected to decompression to recover the organic solvents and the high-boiling point organic solvents, residual sticky liquid is the zinc isoocatanoate with a high metal content, the zinc mass content is larger than 20%, the viscosity is smaller than 20,000 mPa.S, according to the technical scheme, the problem is wellsolved, and the method can be used for preparing the low-viscosity zinc isoocatanoate with the high metal content.

Description

technical field [0001] The invention relates to a preparation method of zinc isooctanoate. Background technique [0002] Zinc isooctanoate is widely used, and it has better characteristics when used in light-colored paints. It can reduce the color of the paint film and improve the gloss. It is an upgraded product of naphthenate; it can also be used as a catalyst for polyurethane coatings and elastomers. Promote the crosslinking of aliphatic isocyanate and shorten the curing time; it can also be used in the production of PVC (polyvinyl chloride) synthetic resin liquid heat stabilizer, etc. [0003] The main synthetic technology about isooctanoate reported at present is mainly divided into following several kinds: [0004] Direct neutralization method; that is, the reaction between oxidized metal salt or hydroxide salt and isooctanoic acid at a certain temperature, after the reaction is completed, the water generated by the reaction is removed, and then diluted with a solvent...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C53/126
CPCC07C51/412C07C53/126
Inventor 宋芬粟小理杨伟领黄晓云黄梅红
Owner SHANGHAI HUAYI GRP CO
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