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A kind of preparation method of catalyst composition for dimethyl sulfide

A technology of dimethyl sulfide and catalyst, which is applied in the field of catalyst composition preparation and can solve the problems of low conversion rate of methanol

Active Publication Date: 2021-11-23
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore diameter of the zeolite catalyst is 7-10 angstroms, the zeolite catalyst is X type, Y type or L type, and the Na 2 The alkali metal content in terms of O is less than 10%; the temperature of the reaction is usually 250-450 °C, but the methanol conversion rate of this method is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Add 100 mL of deionized water and 1.2 g of vanadium pentoxide, 0.4 g of tetrachloropalladic acid, 10.4 g of silica to the reactor and swirl the mixture until all the tetrachloropalladic acid is dissolved. The pH was adjusted to 8. The mixture was heated to 70°C in a rotary evaporator and kept at this temperature for about 30 minutes, after which 31 g of γ-Al 2 o 3 . Slowly impregnated for 24 hours, and then vacuumed until it was dried to constant weight, but the temperature was kept at 70° C., thereby obtaining a catalyst material.

[0022] Next, the catalyst material was calcined in a muffle furnace at 500°C and 700°C at normal pressure for 1 hour respectively. Then, the sample was calcined to a predetermined temperature in a muffle furnace at 1100° C. at a heating rate of 3.0° C. / min, and kept at a temperature of at least 3 hours to obtain a catalyst.

example 2

[0024] Add 100 mL of deionized water and 0.8 g of vanadium pentoxide, 0.3 g of palladium chloride, and 20.4 g of barium carbonate into the reactor and swirl the mixture until all the palladium chloride is dissolved. Adjust the pH of the solution to 10 using ammonia. The mixture was heated to 60°C in a rotary evaporator and kept at this temperature for about 40 minutes, after which 29 g of γ-Al 2 o 3 . Slowly impregnated for 20 hours, and then vacuum until it was dried to a constant weight, but the temperature was kept at 60° C., thereby obtaining a catalyst material.

[0025] Next, the catalyst material was calcined in a muffle furnace at 500°C and 700°C at normal pressure for 1 hour respectively. Then calcinate the sample to a predetermined temperature in a muffle furnace at 1200° C. at a heating rate of 3.0° C. / min, and keep the temperature for at least 2 hours to obtain a catalyst.

example 3

[0027] Add 100 mL of deionized water and 1.0 g of vanadium pentoxide to the reactor, and swirl the mixture with 0.4 g of tetrachloropalladic acid until all tetrachloropalladic acid is dissolved. Adjust the pH of the solution to 10 with ammonia water. The mixture was heated to 80°C in a rotary evaporator and kept at this temperature for about 60 minutes, after which 40 g of γ-Al 2 o 3 . Slowly impregnated for 36 hours, and then vacuumed until it was dried to constant weight, but the temperature was kept at 80° C., thereby obtaining a catalyst material.

[0028] Next, the catalyst material was calcined in a muffle furnace at 500°C and 700°C at normal pressure for 1 hour respectively. Then calcinate the sample to a predetermined temperature in a muffle furnace at 1000° C. at a heating rate of 3.0° C. / min, and keep the temperature for at least 2 hours to obtain a catalyst.

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Abstract

A method for preparing a catalyst composition for dimethyl sulfide, relates to a method for preparing a catalyst composition, the method comprising: mixing a catalyst carrier material with a Pd-containing compound, and then mixing the obtained Pd-containing catalyst carrier material at 1000- Calcining at a temperature of 1200° C. to obtain a modified catalyst carrier; finally combining other active catalyst components with the modified catalyst carrier to obtain a catalyst composition for dimethyl sulfide. The general formula of catalyst of the present invention is (SiO 2 ) a (BaO) b (PdO) c (V 2 o 5 ) d (Al 2 o 3 ) e , in the composition (Al 2 o 3 ) as the benchmark, a / e(b / e)=0~5, c / e=0.5~10, d / e)=0.01~10. The catalyst composition of the invention has high-efficiency catalytic activity and selectivity, can also make methanol have a higher conversion rate, does not produce any harmful substances in the preparation process, and does not cause pollution to the environment.

Description

technical field [0001] The invention relates to a method for preparing a catalyst composition, in particular to a method for preparing a catalyst composition for dimethyl sulfide. Background technique [0002] Dimethyl sulfoxide (DMSO) is a sulfur-containing organic compound. It is a colorless, odorless, transparent liquid at room temperature and a hygroscopic flammable liquid. It has the characteristics of high polarity, high boiling point, good thermal stability, aprotic, and water miscibility. It can be dissolved in most organic substances such as ethanol, propanol, benzene and chloroform, and is known as a "universal solvent". [0003] Dimethyl sulfoxide is generally prepared by oxidation of dimethyl sulfide, so the preparation of dimethyl sulfide is particularly important, and the catalyst for the preparation of dimethyl sulfide is the key. The catalyst for synthesizing dimethyl sulfide usually uses activated alumina as the carrier and alkali metal oxide as the active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/648B01J35/10B01J37/08C07C319/14C07C321/14
CPCC07C319/14B01J23/002B01J23/6482B01J37/082B01J2523/00B01J35/60B01J2523/25B01J2523/31B01J2523/41B01J2523/55B01J2523/824C07C321/14
Inventor 张文政蒋宁姜宏达黄丽吴婷
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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