A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane

A technology of microchannel reactor and production process, applied in the direction of halogen addition preparation, organic chemistry, etc., can solve the problems of waste water, waste gas, energy consumption and other by-products that are easy to form explosive mixtures, shorten the production process, reduce labor intensity, Reduce the effect of manual controls

Active Publication Date: 2022-03-29
MAANSHAN DEHONG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Purpose of the invention: In order to solve the existing problems in the existing synthesis process, especially the synthesis reactor, acetylene gas and air are easy to form explosive mixtures, the generation of by-products in the synthesis process, and the waste water, waste gas, and energy consumption in the process of neutralization and distillation Problem, the present invention provides a kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane

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  • A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane
  • A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane

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Embodiment 1

[0039] A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane:

[0040] (1) Microchannel reactor: the inner diameter of the reaction channel is 500 μm; the total volume of the reaction zone of the microchannel reactor is 27ml;

[0041] (2) Under the drive of the plunger pump of the power system, the raw material bromine is continuously introduced into the microchannel reactor at a flow rate of 0.7kg / min; the acetylene is continuously introduced into the microchannel reaction at a flow rate of 0.057kg / min through the gas mass flow controller device; before the acetylene and bromine are passed into the microchannel reactor, they respectively flow through the valve group, and the valve group includes a one-way valve, a safety valve and a switch.

[0042](3) The acetylene and bromine that pass into are fully mixed and reacted in the microchannel reactor; the system pressure is 0.2MPa in the microchannel reactor; Reaction temperature≤70°C); ...

Embodiment 2

[0045] A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane:

[0046] (1) Microchannel reactor: the inner diameter of the reaction channel is 1000um; the total volume of the reaction zone of the microchannel reactor is 45ml;

[0047] (2) Under the drive of the plunger pump of the power system, the raw material bromine is continuously introduced into the microchannel reactor at a flow rate of 0.8kg / min; the acetylene is continuously introduced into the microchannel reaction at a flow rate of 0.065kg / min through the gas mass flow controller device; before the acetylene and bromine are passed into the microchannel reactor, they respectively flow through the valve group, and the valve group includes a one-way valve, a safety valve and a switch.

[0048] (3) The acetylene and bromine that pass into are fully mixed and reacted in the microchannel reactor; the system pressure in the microchannel reactor is 0.3MPa; by the heat exchange system,...

Embodiment 3

[0051] A kind of production technology that utilizes microchannel reactor to prepare tetrabromoethane:

[0052] (1) Microchannel reactor: the inner diameter of the reaction channel is 1500um; the total volume of the reaction zone of the microchannel reactor is 54ml;

[0053] (2) Under the drive of the plunger pump of the power system, the raw material bromine is continuously introduced into the microchannel reactor at a flow rate of 0.9kg / min; the acetylene is continuously introduced into the microchannel reaction at a flow rate of 0.073kg / min through the gas mass flow controller device; before the acetylene and bromine are passed into the microchannel reactor, they respectively flow through the valve group, and the valve group includes a one-way valve, a safety valve and a switch.

[0054] (3) The acetylene and bromine that pass into are fully mixed and reacted in the microchannel reactor; the system pressure in the microchannel reactor is 0.4MPa; by heat exchange system, the...

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Abstract

The invention discloses a production process for preparing tetrabromoethane by utilizing a microchannel reactor. The raw material bromine is continuously fed into the microchannel reactor driven by the power system; the acetylene is continuously fed into the microchannel reactor through the gas mass flow controller; the introduced acetylene and bromine are fully mixed in the microchannel reactor, Reaction; through the heat exchange system, the temperature of the reactant is controlled; after the reaction process is completed, the product is collected through the gas-liquid separator; after the collected product is analyzed and qualified, a stabilizer is added and packaged into a product. The production process of the present invention can realize the uniform distribution of acetylene and bromine in the microchannel reactor, make acetylene and bromine fully contact, improve production efficiency and yield, improve the utilization rate of raw material acetylene; avoid the formation of acetylene and air explosive Mixture, improve safety; shorten the process flow, greatly reduce the generation of waste water, waste gas and eliminate by-products.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis technology, and in particular relates to a production technology for preparing tetrabromoethane by using a microchannel reactor. Background technique [0002] 1,1,2,2-Tetrabromoethane is a colorless or pale yellow strong refractive liquid with iodoform odor. Miscible with ethanol, ether, chloroform, aniline, glacial acetic acid, insoluble in water. The boiling point is 243.5°C (7.2kPa), 114°C (0.267kPa). The relative density is 2.9656 (20 / 4°C), and the refractive index is 1.638. It can decompose when exposed to light and heat, and the color turns yellow. When the temperature is higher than 190℃, the decomposition product is highly toxic carbonyl bromide vapor. Tetrabromoethane is an important chemical auxiliary agent. It is used as a cocatalyst in the process of oxidizing xylene into terephthalic acid in the production process of polyester (PTA), a raw material for polyester; Used a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/02C07C19/075
CPCC07C17/02C07C19/075
Inventor 李志勇
Owner MAANSHAN DEHONG BIOTECH
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