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Method for preparing zinc diphenyl dithiocarbamate

A technology of zinc diphenyldithiocarbamate and sodium diphenyldithiocarbamate, which is applied in the field of chemical synthesis, can solve the problems that cannot be prepared with zinc diphenyldithiocarbamate, and achieve superior vulcanization performance , short production cycle and short vulcanization time

Inactive Publication Date: 2011-02-16
JIANGSU FEIYA CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese Patent Publication No. CN1485319A discloses a preparation method of monoalkyl or monoaryl dithiocarbamate, which is obtained by reacting R~NH2, CS2 and MOH as raw materials between 0~70°C, but The method cannot be used for the preparation of zinc diphenyldithiocarbamate

Method used

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  • Method for preparing zinc diphenyl dithiocarbamate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 10.1g of sodium hydroxide and 300g of water into the reactor and stir to dissolve, then add 49.7g of diphenylamine, stir well; start to add 83g of 40% carbon disulfide solution dropwise, and control the temperature at 40°C, stir for 1h after the dropwise addition, the reaction product The pH=9 of sodium diphenyldithiocarbamate; filter, put the filtered sodium diphenyldithiocarbamate into a replacement reactor, and add 17.5g of zinc chloride with a weight concentration of 98% under stirring to prepare Form a zinc chloride solution with a concentration of 10% by weight, stir for another 3 hours, centrifugally filter, and wash to obtain zinc diphenyldithiocarbamate with a yield of 96% and a purity of ≥98%.

Embodiment 2

[0022] Add 25g of sodium hydroxide and 300g of water into the reactor and stir to dissolve, then add 61g of diphenylamine, and stir evenly; start to add 27.2g of 80% carbon disulfide solution dropwise, and control the temperature at 30°C, stir for 3h after the addition, and the reaction product two The pH=8.8 of sodium phenyldithiocarbamate; filter, put the filtered sodium diphenyldithiocarbamate into a replacement reactor, add 21.5g of zinc chloride with a weight concentration of 98% under stirring to prepare The zinc chloride solution with a weight concentration of 10% was stirred for another 2 hours, centrifugally filtered, and washed to obtain zinc diphenyldithiocarbamate with a yield of 97% and a purity of ≥98%.

[0023] The present invention's gained rubber vulcanization accelerator zinc diphenyl dithiocarbamate has following structure:

[0024]

[0025] The product can be crushed to less than 60 mesh, sieved, and packaged to obtain the finished product.

[0026] Fin...

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Abstract

The invention relates to a method for preparing zinc diphenyl dithiocarbamate, belonging to the technical field of chemical synthesis. The method comprises the steps of: firstly, reacting carbon disulfide with diphenylamine under the condition that water is used as solvent and sodium hydroxide is used as a catalyst, and then carrying out replacement reaction with zinc chloride. The synthesis can be finished in two steps in the reaction process and is free of complicated processing processes, three wastes are not generated basically, and products have high purity and good color. The invention has the advantages that the sodium hydroxide is cheap and common and is easy to purchase, the method has short production cycle and high safety coefficient, basically no waste gas is discharged, the products have high melting point and white appearance, the total product yield is 80-92% and the comprehensive cost is low.

Description

technical field [0001] The invention relates to a new process for synthesizing zinc diphenyldithiocarbamate from diphenylamine, specifically a method for synthesizing zinc diphenyldithiocarbamate from diphenylamine, carbon disulfide and zinc chloride, belonging to The field of chemical synthesis technology. Background technique [0002] In recent years, with the rapid development of the rubber processing industry, the rapid development of the domestic automobile industry and communication industry has driven the rapid growth of the rubber processing industry and provided unprecedented good opportunities for the development of the rubber additives industry. Since my country's accession to the WTO, although the production of rubber accelerator products in China has been greatly improved, compared with foreign developed countries, there is still a big gap in product intrinsic quality and "green" environmental protection technology. China's additive industry will expand the mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/16
Inventor 曹宏生吴开运於海霞
Owner JIANGSU FEIYA CHEM IND
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