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A method to prolong the operation period of fluidized bed and improve the operation quality

A technology of operating cycle and operating quality, which is applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, organic chemistry, etc., can solve problems such as increased accumulation of impurities, short operating cycle, increased side reactions, etc., to achieve The effect of improving conversion yield, stable production operation, and reducing parking and discharging

Active Publication Date: 2020-09-08
LUXI CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the monomer production enterprises now, as the reaction time progresses, the accumulation of impurities in the system by the raw materials and the reaction process increases, the positive reaction decreases, and the side reaction increases, which affects the continuation of the system reaction. The operation cycle is generally 30-50 days. Shut down and discharge the material to restart the reaction. The operation cycle is short, and the average particle size of the discharged waste contacts is small, containing highly active copper. Exposure to the air will cause oxidation or even combustion. If a large number of waste contacts are not properly disposed of , it will cause serious pollution to the environment, and there are potential safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Under the action of copper-based catalyst, silicon powder and methyl chloride react in the fluidized bed reactor at a certain temperature and pressure to generate methyl chlorosilane monomer gas, which is separated by multi-stage cyclone separator, and the contact body returns to the reactor continue to participate in the reaction,

[0038] The reaction cycle of the reactor is divided into four stages: the early stage, the middle stage, the middle and late stage, and the late stage. According to the reaction characteristics of each stage, the content of trace elements, and the content of impurities, the ratio of catalyst addition, contact body (silicon powder and copper powder are mixed to form active Contact body) Impurities are thrown out to ensure the best operating conditions, to extend the operating cycle and improve the operating quality.

[0039]The first stage: in the early stage of the reaction, the catalyst addition ratio is: simple substance: suboxide: oxide ...

Embodiment 2

[0045] Silicon powder and methyl chloride react in a fluidized bed reactor under the action of a copper-based catalyst at a certain temperature and pressure to generate methylchlorosilane monomer gas. After being analyzed by a multi-stage cyclone separator, the contact body continues to return to the reaction The organ participates in the reaction,

[0046] The reaction cycle of the reactor is divided into four stages: the early stage, the middle stage, the middle and late stage, and the late stage. According to the reaction characteristics of each stage, the content of trace elements, and the content of impurities, the ratio of catalyst addition and the removal of contact impurities are controlled to ensure optimal operating conditions. , to extend the operating cycle and improve the operating quality.

[0047] The first stage: in the early stage of the reaction, the ratio of catalyst addition element: suboxide: oxide = 70%: 20%: 10%, time: 20-25 days. Silicon powder, cataly...

Embodiment 3

[0053] Silicon powder and methyl chloride react in a fluidized bed reactor under the action of a copper-based catalyst at a certain temperature and pressure to generate methylchlorosilane monomer gas. After being analyzed by a multi-stage cyclone separator, the contact body continues to return to the reaction The organ participates in the reaction,

[0054] The reaction cycle of the reactor is divided into four stages: the early stage, the middle stage, the middle and late stage, and the late stage. According to the reaction characteristics of each stage, the content of trace elements, and the content of impurities, the ratio of catalyst addition and the removal of contact impurities are controlled to ensure optimal operating conditions. , to extend the operating cycle and improve the operating quality.

[0055] The first stage: in the early stage of the reaction, the catalyst addition ratio element: oxide sub-oxide: oxide = 75%: 15%: 10%, time: 20-25 days. Silicon powder, ca...

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Abstract

The invention discloses a method for prolonging an operation period of a fluidized bed and improving operation quality. The method comprises the following steps: in a reaction early stage, silicon powder, a catalyst and methyl chloride are introduced into a reactor, the addition mass percentage of each component in the catalyst is: an elemental substance: a sub-oxide: an oxide = 70-80%:20-15%:10-5%, and an operation time is 20-25 d; in a reaction middle stage, the addition mass percentage of each component in the catalyst is: the elemental substance: the sub-oxide: the oxide = 20-30%:60-40%:30-20%, and an operation time is 60-65 d; in a reaction middle and late stage, the addition mass percentage of each component in the catalyst is: the elemental substance: the sub-oxide: the oxide = 15-20%:80-70%:10-5%, and an operation time is 20-25 d; and in a reaction later stage, addition of the catalyst is stopped, and an operation time is 7-10 d. The operation period of the technology is 120-130 d, a system is stable in operation, frequent starting and stopping is avoided, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of organosilicon fluidized bed reactor operation, in particular to a method for prolonging the operating period of the fluidized bed and improving the operating quality. Background technique [0002] Organosilicon materials (silicones) are a class of new materials with excellent performance, unique functions and a wide range of uses. They belong to one of the three industries with the largest industrial scale in new chemical materials along with engineering plastics and organic fluorine materials. The main products include silicone oil, silicone rubber, silicone resin, silane coupling agent and silicone surface active agent, coating, foam stabilizer, etc. Silicone monomer is mainly used in the production of silicone materials, which is the foundation and key of the entire silicone industry, and is the core. [0003] Silicone monomer production equipment mainly includes: silicon powder processing, vaporizer,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/16
CPCC07F7/16
Inventor 赵炳泉王长明窦冰之杨本超李吉峰周岩
Owner LUXI CHEM GRP
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