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Reaction device, application in synthesizing sodium methyl mercaptide, and synthesis method

A reaction device, sodium hydrosulfide technology, applied in chemical instruments and methods, mercaptan preparation, chemical/physical/physical-chemical reactors, etc., can solve secondary pollution, high equipment and production costs, and increase the complexity of production processes And other issues

Pending Publication Date: 2019-03-08
SHANDONG HIMILE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This secondary circulation system increases the complexity of the production process, increasing equipment and reaction costs
[0011] Chinese patent CN201268672Y discloses a sodium methyl mercaptide production system, which not only uses a plurality of absorption barrels to circulate for multi-stage absorption, but also sends unabsorbed odor (methyl mercaptan gas) to the incinerator for processing, not only the equipment And production cost is higher, also produces the secondary pollution that causes by incineration at the same time

Method used

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  • Reaction device, application in synthesizing sodium methyl mercaptide, and synthesis method
  • Reaction device, application in synthesizing sodium methyl mercaptide, and synthesis method
  • Reaction device, application in synthesizing sodium methyl mercaptide, and synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0107] Connect the two plunger pumps, the tube reactor, and flush with water. Clean the gas-liquid separation tank and connect it to the tubular reactor. Connect the outlet of the gas-liquid separation tank and the outlet of the third pump to the stainless steel microchannel reactor respectively. After the microchannel reactor was rinsed with water, it was filled with 15% NaOH solution.

[0108] The temperature of the tubular reactor was set at 60°C, the feed rate was set so that the molar ratio of sodium hydrosulfide and dimethyl sulfate was 2: 1, and the flow rates of dimethyl sulfate solution and sodium hydrosulfide solution were 9mL / min and 25mL / min, the residence time is 50min. During the reaction process, the temperature is controlled at about 60°C, and the gas-liquid-solid three-phase generated by the reaction enters the gas-liquid separation tank. Methyl mercaptan gas is discharged from the gas outlet of the gas-liquid separation tank into the microchannel reactor, ...

Embodiment 2

[0110] Connect the two plunger pumps, the tube reactor, and flush with water. Clean the gas-liquid separation tank and connect it to the tubular reactor. Connect the outlet of the gas-liquid separation tank and the outlet of the third pump to the stainless steel microchannel reactor. After the microchannel reactor was rinsed with water, it was filled with 15% NaOH solution.

[0111] The temperature of the tubular reactor was set at 65°C, the feed rate was set so that the molar ratio of sodium hydrosulfide to dimethyl sulfate was 2:1.1, and the flow rates of dimethyl sulfate solution and sodium hydrosulfide solution were 10mL / min and 25mL / min, the residence time is 46min. During the reaction process, the temperature is controlled at about 65°C, and the gas-liquid-solid three-phase generated by the reaction enters the gas-liquid separation tank. Methyl mercaptan gas is discharged from the gas outlet of the gas-liquid separation tank into the microchannel reactor, and at the s...

Embodiment 3

[0113] Connect the two plunger pumps, the tube reactor, and flush with water. Clean the gas-liquid separation tank and connect it to the tubular reactor. Connect the outlet of the gas-liquid separation tank and the outlet of the third pump to the stainless steel microchannel reactor. After the microchannel reactor was rinsed with water, it was filled with 15% NaOH solution.

[0114] The temperature of the tubular reactor was set at 65°C, and the feed rate was set so that the molar ratio of sodium hydrosulfide and dimethyl sulfate was 2: 1.2, and the flow rates of dimethyl sulfate solution and sodium hydrosulfide solution were 12mL / min and 28mL / min, the residence time is 43min. During the reaction process, the temperature is controlled at about 65°C, and the gas-liquid-solid three-phase generated by the reaction enters the gas-liquid separation tank. Methyl mercaptan gas is discharged from the gas outlet of the gas-liquid separation tank into the microchannel reactor, and at...

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Abstract

The invention discloses a reaction device, application in synthesizing sodium methyl mercaptide, and a synthesis method. The reaction device comprises a tubular reactor with an inlet end and an outletend, a gas-liquid separation device connected with a fluid at the outlet end of the tubular reactor, and a microchannel reactor connected with a fluid at an outlet end of the gas-liquid separation device.

Description

technical field [0001] The invention relates to a reaction device, which can prevent the gas generated in the reaction, such as methyl mercaptan gas, from escaping. The present invention also relates to the application of the reaction device in the synthesis of sodium methyl mercaptide and the method for synthesizing sodium methyl mercaptide. Background technique [0002] Sodium methyl mercaptide is a basic chemical raw material, which can be used to produce a variety of pesticides and feed additives. [0003] There are many ways to synthesize sodium methyl mercaptide. The easiest and lowest cost way is to use a reactor to react sodium hydrosulfide and dimethyl sulfate to generate methyl mercaptan gas, and then use multi-stage absorption or spraying methods to carry out lye Absorb, generate sodium methyl mercaptide solution, and its synthesis process route is as follows: [0004] [0005] The traditional kettle-type batch process has the following defects: [0006] - L...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01J19/20B01J19/00C07C319/08C07C321/04
CPCB01J19/0053B01J19/0066B01J19/0093B01J19/1812B01J19/20C07C319/08C07C321/04
Inventor 郭敏杨安明王威苑广凤任苗苗
Owner SHANDONG HIMILE CHEM TECH
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