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Synthesis process for dithiocarbamate

A technology of dithioamino group and synthesis process, applied in directions such as organic chemistry, can solve problems such as low production efficiency, high cost and complicated production process, and achieve the effects of improving yield, improving work efficiency and overcoming many processes

Inactive Publication Date: 2016-06-01
QINGDAO SHOUTAI AGRI SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

In the current process method for preparing dithiocarbamate, the process flow is not easy to implement, the finished product of dithiocarbamate has low purity, the single-pass conversion rate of reactants is low, the production process is complicated, and the production efficiency is low. High cost, not suitable for mass production

Method used

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Embodiment

[0014] The synthesis technique of the dithiocarbamate of the present embodiment may further comprise the steps:

[0015] (1) First, add a certain amount of carbon disulfide, lye and carbonamide to the reaction vessel;

[0016] (2) Stir continuously, and after it is mixed evenly, control the temperature and add carbon disulfide dropwise;

[0017] (3) Control the reaction system within a certain temperature range and stir for a period of time;

[0018] (4) Then, after heating to a certain temperature, react at a constant temperature for a certain period of time;

[0019] (5) After the reaction is completed, stir, cool and crystallize, and filter;

[0020] (6) The product was obtained by vacuum drying at 88°C.

[0021] The synthesis process of the dithiocarbamate does not require further processing, the process is simple, the data is accurate and easy to collect, the process flow is easy to implement, and the industrial production of the product is realized.

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Abstract

The invention discloses a synthesis process for dithiocarbamate. The synthesis process comprises the following steps: (a) adding a certain amount of carbon disulfide, alkali lye and carbamide into a reaction vessel; (b) carrying out continuous stirring, and after uniform mixing of the above-mentioned substances, controlling temperature and adding carbon disulfide drop by drop; (c) controlling the temperature of a reaction system in a certain range; (d) then carrying out heating to a certain temperature and then carrying out reaction at a constant temperature for a certain period of time; (e) after completion of the reaction, successively carrying out stirring, cooling, crystallization and filtering; and (f) carrying out vacuum drying at 65 to 88 DEG C so as to prepare the product dithiocarbamate. According to the invention, dithiocarbamate is synthesized from carbon disulfide and carbamide according to certain technological parameters; the synthesis process has simple synthesis steps, high synthesis efficiency and low synthesis cost; the synthesized dithiocarbamate has the advantages of high efficiency, cheapness and a wide application scope; and through controlling of the pH value of the reaction system, the conversion rate of the whole process and product quality are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a synthesis process of dithiocarbamate. Background technique [0002] Molecular weight of dithiocarbamate: (275.8)x (Zineb) Properties: yellow liquid, corrosive; slightly soluble in water, insoluble in organic solvents. In the current process method for preparing dithiocarbamate, the process flow is not easy to implement, the finished product of dithiocarbamate has low purity, the single-pass conversion rate of reactants is low, the production process is complicated, and the production efficiency is low. The cost is high and is not suitable for mass production. Contents of the invention [0003] In order to overcome the above-mentioned technical problems existing in the prior art field, the purpose of the present invention is to provide a synthesis process of dithiocarbamate. The present invention not only has a simple production process and improves...

Claims

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Application Information

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IPC IPC(8): C07C333/16
Inventor 张晶
Owner QINGDAO SHOUTAI AGRI SCI & TECH CO LTD
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