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A kind of preparation method of alumina type catalyst of disproportionation methyltrichlorosilane reaction

A disproportionation methyltrichlorosilane and catalyst technology, which is applied in the field of alumina catalyst preparation, can solve the problems of easy loss of AlCl3, achieve the effects of solving environmental pollution and safety problems, improving efficiency, and reducing production costs

Inactive Publication Date: 2018-05-22
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the loaded AlCl 3 Easy to drain

Method used

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  • A kind of preparation method of alumina type catalyst of disproportionation methyltrichlorosilane reaction
  • A kind of preparation method of alumina type catalyst of disproportionation methyltrichlorosilane reaction
  • A kind of preparation method of alumina type catalyst of disproportionation methyltrichlorosilane reaction

Examples

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Comparison scheme
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Embodiment 1

[0037] This embodiment will illustrate that the inventive method is 1:2 with double salt Al / Na ratio, double salt (NaAlCl 4 ) loading at 9%, the selected Al 2 o 3 α-Al 2 o 3 , according to the reaction path of high temperature and high pressure load combined with impregnation method.

[0038] With 9% double salt load and 1:2 Al / Na ratio, weigh a certain amount of NaCl and AlCl 3 , and dissolve NaCl in water to form a solution, and weigh 4g α-Al 2 o 3 The carrier was impregnated in NaCl solution for 1 h, and then dried in a muffle furnace at 150 °C. After drying, AlCl was added to it 3 Transfer the reaction system to a polytetrafluoroethylene rod and seal it, and place it in a muffle furnace at 220°C for 16 hours; after the reaction is complete, cool it slowly at room temperature to obtain the modified Al 2 o 3 type catalyst.

[0039] The efficiency of producing dimethyldichlorosilane by the disproportionation reaction of the alumina catalyst prepared in this example t...

Embodiment 2

[0041] This embodiment will illustrate that the inventive method is 1:2 with double salt Al / Na ratio, double salt (NaAlCl 4 ) loading at 12%, the selected Al 2 o 3 α-Al 2 o 3 , according to the reaction path of high temperature and high pressure load combined with impregnation method.

[0042] With 12% double salt load and 1:2 Al / Na ratio, weigh a certain amount of NaCl and AlCl 3 , and dissolve NaCl in water to form a solution, and weigh 4g α-Al 2 o 3 The carrier was impregnated in NaCl solution for 1 h, and then dried in a muffle furnace at 150 °C. After drying, AlCl was added to it 3 Transfer the reaction system to a polytetrafluoroethylene rod and seal it, and place it in a muffle furnace at 220°C for 16 hours; after the reaction is complete, cool it slowly at room temperature to obtain the modified Al 2 o 3 type catalyst.

[0043] The efficiency of producing dimethyldichlorosilane by the disproportionation reaction of the alumina catalyst prepared in this example...

Embodiment 3

[0045] This embodiment will illustrate that the inventive method is 1:2 with double salt Al / Na ratio, double salt (NaAlCl 4 ) loading at 12%, the selected Al 2 o 3 β-Al 2 o 3 , according to the reaction path of high temperature and high pressure load combined with impregnation method.

[0046] With 12% double salt load and 1:2 Al / Na ratio, weigh a certain amount of NaCl and AlCl 3 , and dissolve NaCl in water to form a solution, and then weigh 4gβ-Al 2 o 3 The carrier was impregnated in NaCl solution for 1 h, and then dried in a muffle furnace at 150 °C. After drying, AlCl was added to it 3 Transfer the reaction system to a polytetrafluoroethylene rod and seal it, and place it in a muffle furnace at 220°C for 16 hours; after the reaction is complete, cool it slowly at room temperature to obtain the modified Al 2 o 3 type catalyst.

[0047] The efficiency of producing dimethyldichlorosilane by the disproportionation reaction of the alumina catalyst prepared in this exa...

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Abstract

A method for preparing an alumina-type catalyst for the reaction of disproportionated methyltrichlorosilane, which combines a high-temperature and high-pressure loading method with an impregnation method, and weighs a certain amount of NaCl and AlCl3, and NaCl was dissolved in water to form a solution, and then a certain amount of Al2O3 carrier was impregnated in the NaCl solution, then dried, and AlCl3 was added to it, and the reaction system was transferred to a polytetrafluoroethylene rod and sealed, placed in React in a muffle furnace at 220°C; after the reaction is completed, dip it in a certain concentration of Fe3O4 solution, pour off the liquid after impregnation, and dry the carrier in a muffle furnace at 150°C. Add AlCl3 to it and transfer the reaction system to a polytetrafluoroethylene rod to seal it, and place it in a muffle furnace at 220°C for reaction. After the reaction is completed, cool slowly to obtain a Fe3O4-modified Al2O3 catalyst. The generated dimethyldichlorosilane can be widely used in many industries such as building materials, electronics, textile, paper, leather, chemical industry, paint and paint.

Description

technical field [0001] The invention relates to a method for preparing an alumina-type catalyst for the reaction of disproportionated methyltrichlorosilane, belonging to the technical field of organosilicon materials. Background technique [0002] The consumption of dimethyldichlorosilane (dimethyl for short) accounts for about 80wt% of the whole monomer production, and the organosilicon material processed by it is widely used, and is known as "industrial vitamin". Jiangxi Xinghuo Chemical Plant, the largest monomer production plant in my country, has the annual production capacity of about 200kt of organochlorosilane, but the by-products of the reaction process are monomethyltrichlorosilane (abbreviated as a) and trimethylchlorosilane (abbreviated as trimethyl) However, the content remains high (5% to 15% and 5%, respectively), and its application is limited. With the expansion of production scale, the absolute quantity of Class I and Class III has also increased rapidly, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/128B01J37/02B01J37/08C07F7/12
CPCB01J27/128B01J37/024B01J37/08C07F7/122C07F7/123
Inventor 徐文媛姚成姣刘一平李孝艳杨梅徐永昌秦晓丹况熙
Owner EAST CHINA JIAOTONG UNIVERSITY