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A kind of preparation technology of zinc acetylacetonate

A technology for the preparation of zinc acetylacetonate, which is applied in the preparation of aldehyde/ketone chelates, organic chemistry, etc., can solve the problems of large investment and high maintenance costs, and achieve the effects of easy operation, less by-products, and simple and efficient process flow

Active Publication Date: 2021-12-17
DONGGUAN CHNV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of practical operation, this method still needs to use more water to ensure the full reaction of materials (2000g of acetylacetone, 780g of zinc oxide, 2000g of deionized water), and then the water needs to be discharged through the drying process to generate unnecessary energy consumption
In addition, it is necessary to use a special high-shear dispersing equipment to perform high-shearing on the material to ensure the crushing and diffusion of the coated particles in the reaction system, and the investment of high-shearing and high-dispersing equipment is large, and the maintenance cost is high

Method used

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  • A kind of preparation technology of zinc acetylacetonate
  • A kind of preparation technology of zinc acetylacetonate
  • A kind of preparation technology of zinc acetylacetonate

Examples

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Effect test

example 1

[0026] Add 400g of acetylacetone into the three-necked flask, heat up to 90°C-100°C, weigh 160g of zinc oxide and add it into the three-necked flask at a stirring rate of 150rpm, continue to heat up to 110°C-120°C, add 1g of water and mix for 30 minutes to produce material, after crushing, the white powder product of zinc acetylacetonate can be obtained. The yield of zinc acetylacetonate obtained was 95.7%, the zinc content was 25.2%, and m.p.129.8°C.

example 2

[0028] Add 1000g of acetylacetone into the three-necked flask, heat up to 90°C-100°C, weigh 395g of zinc oxide and add it into the three-necked flask at a stirring rate of 180rpm, continue to heat up to 115°C-125°C, add 5g of hydrogen peroxide and mix for 30 minutes to produce material, after crushing, the white powder product of zinc acetylacetonate can be obtained. The yield of zinc acetylacetonate obtained was 94.9%, the zinc content was 25.6%, and m.p.131.4°C.

example 3

[0030] Add 2000g of acetylacetone into the three-necked flask, heat up to 90°C-100°C, weigh 780g of zinc oxide and add it into the three-necked flask at a stirring rate of 200rpm, continue to heat up to 120°C-130°C, add 8g of glacial acetic acid and mix for 30 minutes. After discharging and pulverizing, the white powder product of zinc acetylacetonate can be obtained. The yield of zinc acetylacetonate obtained was 94.3%, the zinc content was 25.9%, and m.p.132.6°C.

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Abstract

The present invention now provides a process for preparing zinc acetylacetonate. Mix acetylacetone and zinc oxide into a reactor, stir and heat to 110°C to 140°C, add a certain amount of catalyst and react for 30 minutes to obtain the target product zinc acetylacetonate. The whole technological process of the invention is simple and efficient, easy to operate, not only saves the production cost, but also greatly improves the production efficiency, and also meets the requirements of green chemistry. The product obtained by adopting the technological conditions of the present invention is proved to have few by-products and high purity after IR and DSC tests. The static thermal stability of the product in PVC is better than similar products.

Description

technical field [0001] The invention relates to the field of chemical additives, in particular to a preparation process of zinc acetylacetonate, the prepared zinc acetylacetonate is widely used in PVC heat stabilizers, catalysts, flame retardants, resin crosslinking agents, superconducting films, and heat-reflecting glass films And transparent conductive film forming agent and other fields. Background technique [0002] Acetylacetonate is an important class of organometallic compounds, and its many special properties have attracted widespread attention. Zinc acetylacetonate, as a representative variety, is widely used in the fields of PVC heat stabilizers, catalysts, flame retardants, resin crosslinking agents, superconducting films, heat-reflecting glass films, and transparent conductive film forming agents. [0003] At present, the preparation methods of zinc acetylacetonate are mainly divided into the following two types: 1) liquid phase method, that is, react metal zinc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/77C07C49/92
CPCC07C45/77C07C49/92
Inventor 胡丹陈立桓荀育军王玉梅
Owner DONGGUAN CHNV TECH CO LTD
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