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Method for synthesizing chloromethane from gas-state hydrogen chloride

A technology of methyl chloride and hydrogen chloride, applied in the methods of chemically changing substances by atmospheric pressure, chemical instruments and methods, pressure vessels used in chemical processes, etc. speed, the effect of reducing environmental pressure

Inactive Publication Date: 2018-03-20
ANHUI DONGZHI GUANGXIN AGROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no special requirement for pressure, and the catalyst will not be deactivated, but hydrogen chloride needs to be overdose to suppress the formation of methyl ether, resulting in a large amount of by-product hydrochloric acid containing methanol, and the treatment cost is high

Method used

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  • Method for synthesizing chloromethane from gas-state hydrogen chloride

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Embodiment 1

[0027] see figure 1 As shown, the technical solution adopted in the present invention is: a method for synthesizing methyl chloride from gaseous hydrogen chloride, and the method for synthesizing methyl chloride from gaseous hydrogen chloride specifically comprises the following steps:

[0028] 1).Assembly: There is a discharge pipe at the bottom of the tubular circulating fluidized bed reactor, the discharge pipe is connected to the methanol collection tank, the top of the reactor is equipped with stirring, gas phase outlet, vent port and feed port, and the gas phase outlet is connected Vacuum pump, the vent port is connected to the hydrogen chloride gas buffer tank, the feed port is connected to the methanol high tank, and the inlet and outlet provided on the lower side of the reactor body are respectively connected to the condensed water inlet and outlet;

[0029] 2). Feeding: Add 10mol of hydrogen chloride gas and 15mol of methanol as raw materials into the reactor accordi...

Embodiment 2

[0037] see figure 1 As shown, the technical solution adopted in the present invention is: a method for synthesizing methyl chloride from gaseous hydrogen chloride, and the method for synthesizing methyl chloride from gaseous hydrogen chloride specifically comprises the following steps:

[0038] 1).Assembly: There is a discharge pipe at the bottom of the tubular circulating fluidized bed reactor, the discharge pipe is connected to the methanol collection tank, the top of the reactor is equipped with stirring, gas phase outlet, vent port and feed port, and the gas phase outlet is connected Vacuum pump, the vent port is connected to the hydrogen chloride gas buffer tank, the feed port is connected to the methanol high tank, and the inlet and outlet provided on the lower side of the reactor body are respectively connected to the condensed water inlet and outlet;

[0039] 2). Feeding: Add 10mol of hydrogen chloride gas and 20mol of methanol as raw materials into the reactor accordi...

Embodiment 3

[0047] see figure 1 As shown, the technical solution adopted in the present invention is: a method for synthesizing methyl chloride from gaseous hydrogen chloride, and the method for synthesizing methyl chloride from gaseous hydrogen chloride specifically comprises the following steps:

[0048] 1).Assembly: There is a discharge pipe at the bottom of the tubular circulating fluidized bed reactor, the discharge pipe is connected to the methanol collection tank, the top of the reactor is equipped with stirring, gas phase outlet, vent port and feed port, and the gas phase outlet is connected Vacuum pump, the vent port is connected to the hydrogen chloride gas buffer tank, the feed port is connected to the methanol high tank, and the inlet and outlet provided on the lower side of the reactor body are respectively connected to the condensed water inlet and outlet;

[0049] 2). Feeding: Add 15mol of hydrogen chloride gas and 30mol of methanol as raw materials into the reactor accordi...

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PUM

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Abstract

The invention discloses a method for synthesizing chloromethane from gas-state hydrogen chloride. The method particularly comprises the following steps: reacting by virtue of hydrogen chloride gas andmethanol in a row tube circulating fluidized bed reactor, so as to generate methane chloride, wherein a discharging hole is formed in the bottom of the reactor, a discharging pipe is connected with amethanol collection tank, a stirring hole, a gas-phase outlet, a vent hole and a feeding hole are formed in the top of the reactor, stirring rotating speed is uniform, the gas-phase outlet is connected with a vacuum pump, the vent hole is connected with a hydrogen chloride gas buffer tank, the feeding hole is connected with a methanol high-level tank, and an inlet and an outlet are formed in thelower side of a reactor kettle and are respectively connected with a condensate water inlet and a condensate water outlet; and starting a vacuum pump to stir, introducing condensate water, switching on a bottom valve of the methanol high-level tank, and simultaneously opening a venting pneumatic valve so as to introduce hydrogen chloride gas. The method has the beneficial effects that hydrogen chloride gas can be substantially consumed, the procedure for recycling hydrochloric acid from hydrogen chloride is reduced, and the recycling cost is lowered; and the productivity of chloromethane is increased, and the benefit of an enterprise is increased.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for synthesizing methyl chloride from gaseous hydrogen chloride. Background technique [0002] At present, there are three main synthesis processes of methyl chloride: liquid-phase catalytic method, gas-phase catalytic method and liquid-phase non-catalytic method. [0003] US202613 discloses a method for liquid-phase catalytic synthesis of methyl chloride, using methanol and hydrogen chloride gas as raw materials, ZnCl 2 The solution is a catalyst, and the reaction temperature is 120-130°C. There is no special requirement for pressure, and the catalyst will not be deactivated, but hydrogen chloride needs to be excessive to suppress the formation of methyl ether, thereby producing a large amount of by-product hydrochloric acid containing methanol, and the treatment cost is high. [0004] CN1347862 discloses a method for gas-phase catalytic synthesis of methyl ...

Claims

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Application Information

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IPC IPC(8): C07C17/16C07C19/03B01J3/04B01J8/24B01J19/02
CPCB01J3/042B01J8/24B01J19/02C07C17/16C07C19/03
Inventor 黄中桂蔡小林付承祥袁晓林付志平史正光朱凯明金斐吕礼轮刘云飞王彪
Owner ANHUI DONGZHI GUANGXIN AGROCHEMICAL CO LTD
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