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Mercaptoacetone oxime cleaner production method and system

A technology for methylthioacetaldoxime and clean production, which is applied in the field of clean production methods and systems of methylthioacetaldoxime, can solve problems such as a large amount of waste salt, pollute the environment, etc. The effect of salty wastewater

Inactive Publication Date: 2017-05-31
CHONGQING UNISPLENDOUR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of clean production method and system of methylthioacetaldoxime, to solve the problem of producing a large amount of waste salt when producing methylthioacetaldoxime in the prior art , serious environmental pollution and other issues

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  • Mercaptoacetone oxime cleaner production method and system
  • Mercaptoacetone oxime cleaner production method and system

Examples

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Embodiment 1

[0038] Such as figure 1As shown, a clean production system of methylthioacetaldoxime includes an electrolytic cell, a mixer, a methyl sulfide reactor, an evaporator, a solid-liquid separator, and a dryer connected in sequence, and the electrolytic cell is separated by a cation exchange membrane. In the anode chamber and the cathode chamber, cations can freely pass through the cation exchange membrane, but anions cannot pass through the exchange membrane, so that the cations in the anode chamber can enter the cathode chamber and combine with the hydroxide ions in the cathode chamber to form an alkaline solution, which is convenient for the subsequent preparation of formazan Sodium mercaptide, the liquid outlet of the anode chamber of the electrolytic cell is connected to the liquid inlet of the methyl sulfide reactor, the liquid outlet of the cathodic chamber of the electrolytic cell is connected to the liquid inlet of the mixer, and the liquid outlet of the mixer is connected t...

Embodiment 2

[0053] The production system of this embodiment is as figure 2 As shown, the rest of the devices are the same as in Example 1, only the cathode chamber of the electrolyzer has a separate liquid outlet and gas outlet, and the cathode chamber liquid outlet is connected to the liquid inlet of the mixer through a pipeline, so that the alkaline solution of the cathode flows into the mixer , after adding methyl mercaptan in the mixer, sodium hydroxide reacts with methyl mercaptan to make sodium methyl mercaptide, which enters the methyl sulfide reactor, and the liquid outlet of the anode chamber is connected to the liquid inlet of the methyl sulfide reactor, so that chlorine Reaction of acetaldehyde oxime with sodium methyl mercaptide to prepare methyl thio acetaldehyde oxime. The gas generated in the cathode chamber flows out from the gas outlet, and can be collected and purified for use as other raw materials.

[0054] Specifically, 20wt% sodium chloride aqueous solution and 25w...

Embodiment 3

[0056] The flow chart of the device is the same as in Example 2. Add 12wt% potassium chloride aqueous solution and 30wt% acetaldehyde oxime to the anode chamber respectively, and add 6wt% potassium chloride aqueous solution to the cathode chamber, and the molar ratio of acetaldehyde oxime to methyl mercaptan is 1:1.05; The cell voltage is 3.8V, and the current density of the anode and cathode is 3200A / m 2 The electrolysis temperature is 45°C; the yield of methylthio acetaldoxime is 94.3% (calculated as acetaldehyde oxime), the product purity reaches 98.0%, and the salt content of waste water is 0.05wt%. The electricity consumption for producing methylthioacetaldoxime is 2900kWh / t.

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Abstract

The invention provides a mercaptoacetone oxime cleaner production method and system. The method at least comprises the following steps that (1) aldoxime and a solution containing chloride ions are added into an anode chamber of an electrolytic cell, an electrolyte solution is added into a cathode chamber, energization is conducted for electrolysis, and a solution containing chloroacetaldehyde oxime is formed in the anode chamber; and (2) the solution containing the chloroacetaldehyde oxime is mixed and reacted with methyl mercaptan, a solution containing mercaptoacetone oxime is obtained, separated and purified, and a finished mercaptoacetone oxime product is obtained. Hypertoxic chlorine is not used, brine waste is effectively avoided, the environment protection problem caused by waste salts in existing mercaptoacetone oxime production processes is solved, the raw material consumption is effectively reduced, generated hydrogen can be used as clean fuel, and the raw material utilization rate is effectively improved.

Description

technical field [0001] The invention relates to the field of organic compound synthesis, in particular to a clean production method and system of methylthioglyoxaldoxime. Background technique [0002] Carbamate pesticides are organic pesticides widely used in my country at present, and methomyl is an insecticide with a large output among carbamate pesticides. Methomyl was first promoted and used by DuPont of the United States under the trade name of "Lannate / Wan Ling" in 1966, and it has a history of more than 40 years. Methomyl has the characteristics of strong lethality, strong permeability, quick effect, broad insecticidal spectrum, small residue, many applicable crops and safe use. It is widely used in cotton, cabbage, soybean, tobacco, peanut, citrus, etc. More than 30 kinds of crops. [0003] Methylthioacetaldoxime (methomyl oxime) is the main intermediate of synthesizing methomyl pesticide, the synthesis of methomyl is divided into two steps, the first step synthesi...

Claims

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Application Information

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IPC IPC(8): C25B3/00C07C319/14C07C323/47
CPCC07C319/14C25B3/00C07C323/47
Inventor 王飞肖雷冷方蓉郑道敏丁永良陈薛强乐金波万霞
Owner CHONGQING UNISPLENDOUR CHEM
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