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Method for preparing mesitylene from carbon monoxide and methanol

A carbon monoxide and durene technology, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as restricting the production scale of durene, Achieve good industrial application prospects, simple production process, and good catalyst stability

Active Publication Date: 2022-06-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of raw materials in physical separation, the production scale of durene is restricted
The trimethylene alkylation technology is also limited by the raw materials of trimethylene

Method used

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  • Method for preparing mesitylene from carbon monoxide and methanol
  • Method for preparing mesitylene from carbon monoxide and methanol
  • Method for preparing mesitylene from carbon monoxide and methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The preparation process of the catalyst is as follows: 120 grams of HZSM-5 molecular sieve with a molar ratio of silica to aluminum of 20 is mixed with 60 grams of diatomaceous earth and 100 grams of silica sol with a weight content of 20% silica, and an appropriate amount of 10% dilute nitric acid is added as an auxiliary agent. Extrusion molding. Dry at 120°C and bake at 500°C for 10 hours. The above catalyst was cut into 1 mm to obtain a columnar catalyst precursor A0 (ie, the intermediate product I).

[0099] The A0 sample of 20 grams adopts the aqueous solution dipping that contains copper nitrate, zinc nitrate simultaneously for 12 hours, 120 ℃ of oven dry, 600 ℃ of roasting 3 hours, copper oxide weight content is 3%, zinc oxide weight content 3%, obtained A1 ( Namely intermediate product II).

[0100] A2 (ie intermediate product III) was obtained by calcining 20 grams of A1 in a 100% water vapor atmosphere for 10 hours at a temperature of 350°C, a pressure of 1...

Embodiment 2

[0103] The preparation process of the catalyst is as follows: 60 grams of HZSM-5 molecular sieve with a molar silicon-alumina ratio of 30 is mixed with 100 grams of silica sol with a weight content of 40% silica and 100 grams of alumina, and an appropriate amount of 10% dilute nitric acid is added as an auxiliary agent to extrude bars. forming. Dry at 120°C and bake at 700°C for 4 hours. The above catalyst was cut into 3 mm to obtain a columnar catalyst precursor B0.

[0104] A 20-gram B0 sample was soaked in an aqueous solution containing both ferric nitrate and zinc nitrate for 12 hours, dried at 120°C, and calcined at 550°C for 10 hours. The iron oxide weight content was 15% and the zinc oxide weight content was 1% to obtain B1.

[0105] B2 was prepared by calcining 20 grams of B1 in a 100% water vapor atmosphere for 0.5 hours at a temperature of 800 °C, a pressure of 2.0 MPa, and calcination at 600 °C for 3 hours.

[0106] To 20 grams of B2, add 50 ml of 1% phosphoric ac...

Embodiment 3

[0108] The preparation process of the catalyst is as follows: 200 grams of HZSM-5 molecular sieve with a molar silicon-alumina ratio of 40 is mixed with 20 grams of diatomite and 30 grams of kaolin, and an appropriate amount of 10% dilute nitric acid is added as an auxiliary for extrusion molding. Dry at 120°C and bake at 550°C for 4 hours. The above catalyst was cut into 1.5 mm to obtain a columnar catalyst precursor D0.

[0109] The D0 sample of 20 grams was impregnated with an aqueous solution containing both zinc nitrate and cerium nitrate for 24 hours, dried at 120 ° C, and calcined at 600 ° C for 3 hours, the weight percentage of zinc oxide was 8%, and the weight percentage of cerium oxide was 1% to obtain D1 .

[0110] D2 was prepared by calcining 20 grams of D1 in a 100% water vapor atmosphere for 10 hours, at a temperature of 350°C, a pressure of 3.0 MPa, and calcination at 650°C for 3 hours.

[0111] 20 grams of D2 was added to 50 ml of 5% nitric acid solution by w...

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Abstract

The application discloses a method for preparing durene from carbon monoxide and methanol. In this method, the raw material containing carbon monoxide and methanol is contacted with the catalyst in the reactor to react to obtain the durene; wherein, the catalyst is prepared by modifying the material containing molecular sieve; At least one of self-oxidation modification, steam treatment, and acid treatment. The method provided by this application overcomes the shortcomings of the traditional durene process route, and the coupling of carbon monoxide and methanol to produce durene is a new technology for producing durene. Using carbon monoxide and methanol as raw materials to produce durene is not restricted by raw materials, and the device is easy to realize large-scale, with good economy and good industrial application prospects.

Description

technical field [0001] The application relates to a method for preparing mesitylene from carbon monoxide and methanol, and belongs to the technical field of chemical product preparation. Background technique [0002] The carbon ten aromatic hydrocarbons are a large family, the main members are tetramethylbenzene, meta-tetramethylbenzene, mesitylene, methylpropylbenzene, butylbenzene, diethylbenzene, methylindene, naphthalene and so on. In recent years, the use of pyromellitic dianhydride has been expanding, such as the synthesis of polyimide. Polyimide is a new type of synthetic material with high temperature resistance, low temperature resistance, radiation resistance, impact resistance and excellent electrical conductivity and mechanical properties. It has important uses that cannot be replaced by other engineering plastics in the aerospace and electromechanical industries. [0003] Pymellitic tetratoluene is an important fine chemical raw material. Pymellitic dianhydride...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C15/02B01J29/46B01J29/40B01J29/48B01J29/78B01J29/70B01J29/80
CPCC07C1/20B01J29/46B01J29/405B01J29/48B01J29/7876B01J29/7088B01J29/7049B01J29/80B01J23/002B01J2523/00C07C2529/46C07C2529/40C07C2529/48C07C2529/78C07C2529/70C07C2529/80C07C15/02B01J2523/27B01J2523/3712B01J2523/842Y02P20/52
Inventor 王坤院刘中民朱文良倪友明马现刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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