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Prepn process of catalyst for selective oxidation of isobutene to produce methyl acraldehyde

A technology of methacrolein and selective oxidation, which is applied in the direction of oxidative preparation of carbonyl compounds, etc., can solve the problems of poisoning human body, environmental pollution, and high raw material prices, and achieve the effects of good dispersion effect, reduction of energy consumption, and improvement of preparation efficiency.

Inactive Publication Date: 2007-12-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional acetone cyanohydrin method for the production of methyl methacrylate is mature, the price of raw materials is relatively high, and the use of highly toxic drugs and strong acids has caused serious problems such as environmental pollution and human poisoning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] Embodiment 1: Catalyst preparation process parameter

[0006] In a certain amount of water at 50°C, dissolve a certain amount of ammonium molybdate to prepare solution A; in a certain volume of 15% nitric acid aqueous solution, dissolve a certain amount of bismuth nitrate, iron nitrate, cesium nitrate, potassium nitrate, and cobalt nitrate to prepare Solution B; at 50°C and under stirring conditions, add solution B dropwise to solution A to obtain a slurry. After adjusting the obtained slurry to a pH between 3-4 with ammonia water, age at 50°C for 10h, and in 110 12h at ℃, 3h at 200℃, and finally calcined at 500℃ for 3h.

[0007] The prepared catalyst is carried out on the normal pressure continuous fluidized bed micro-reaction, the stainless steel reaction tube is 300mm long, the inner diameter is 6mm, and the catalyst charge is 0.5ml. GHSV=9000h -1 , Isobutene content 6%. React between 320-400°C.

[0008] Response result:

[0009] Reaction temperature Isobutylene ...

Embodiment 2

[0015] Embodiment 2: Catalyst preparation process parameter

[0016] In a certain amount of water at 50°C, dissolve a certain amount of ammonium molybdate to prepare solution A; in a certain volume of 15% nitric acid aqueous solution, dissolve a certain amount of bismuth nitrate, iron nitrate, cesium nitrate, potassium nitrate, and cobalt nitrate to prepare solution B; at 50°C and under stirring conditions, add solution B dropwise to solution A to obtain a slurry. After adjusting the obtained slurry to a pH between 3-4 with ammonia water, use an ultrasonic oscillator at 50°C to vibrate 1h, dried at 110°C for 12h, dried at 200°C for 3h, and finally calcined at 500°C for 3h,

[0017] The prepared catalyst is carried out on the normal pressure continuous fluidized bed micro-reaction, the stainless steel reaction tube is 300mm long, the inner diameter is 6mm, and the catalyst charge is 0.5ml. GHSV=9000h -1 , Isobutene content 6%. React between 320-400°C.

[0018] Response resul...

Embodiment 3

[0025] Embodiment 3:. Catalyst Preparation Process Parameters

[0026] In a certain amount of water at 50°C, dissolve a certain amount of ammonium molybdate to prepare solution A; in a certain volume of 15% nitric acid aqueous solution, dissolve a certain amount of bismuth nitrate, iron nitrate, cesium nitrate, potassium nitrate, and cobalt nitrate to prepare solution B; at 50°C and under stirring conditions, add solution B dropwise to solution A to obtain a slurry. After adjusting the obtained slurry to a pH between 3-4 with ammonia water, use an ultrasonic oscillator at 50°C to vibrate 1h, dry at 110°C for 12h, dry at 200°C for 3h, use microwave at 800w, heat for 1h.

[0027] The prepared catalyst is carried out on the normal pressure continuous fluidized bed micro-reaction, the stainless steel reaction tube is 300mm long, the inner diameter is 6mm, and the catalyst charge is 0.5ml. GHSV=9000h -1 , Isobutene content 6%. React between 320-400°C.

[0028] Response result: ...

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Abstract

The present invention is preparation process of catalyst for oxidizing isoutene into methyl acraldehyde, and features that the catalyst prepared in new process and with new composition has isoutene converting rate up to 98.5 %, methyl acraldehyde selectivity up to 91.2 %, and methyl acraldehyde yield of 89.83 % in preparing methyl acraldehyde through oxidizing isoutene at 380 deg.c.

Description

Technical field: [0001] The invention belongs to the field of catalysts, in particular to a preparation method and composition of a catalyst for the oxidation of isobutene to methacrolein. Background technique: [0002] Methyl methacrylate is widely used in national defense, construction and fine chemicals, such as the production of plexiglass, plastic modification, production of advanced coatings and adhesives, etc. Although the traditional acetone cyanohydrin method for the production of methyl methacrylate is mature, the price of raw materials is relatively high, and the use of highly toxic drugs and strong acids has caused serious problems such as environmental pollution and human poisoning. In recent years, various countries have launched research on new process routes for the production of methyl methacrylate, among which C 4 The technological route of preparing methyl methacrylate from distillate as raw material is attractive in terms of environmental protection and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J23/18C07C47/22C07C45/27
Inventor 张锁江田伟闫瑞一王茜李强王蕾
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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