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Composite carrier catalyst for aldol condensation and its preparation method and application

A composite carrier, aldol condensation technology, used in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of short life and poor catalyst activity, and achieve high reactivity and stability, The effect of low cost and extended use time

Active Publication Date: 2020-08-18
PUJING CHEM IND SHA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a composite carrier catalyst for aldol condensation with good reactivity and stability and its preparation method and application in view of the defects of poor activity and short life of existing catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 36g of ethyl orthosilicate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution I. Weigh 43g of butyl titanate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution II. Weigh 1.47g cesium carbonate and 0.95g zirconium nitrate, add deionized water and ethanol, stir for 10min, and make solution III. Solution I and solution II were added dropwise and mixed, then added to solution III, stirred at 110°C for 24 hours, washed and filtered to obtain a filter cake. The filter cake was dried in an oven at 110°C for 4 hours, extruded or ball-rolled after drying, and calcined at 500°C for 4 hours to obtain an aldol condensation catalyst.

Embodiment 2

[0031] Weigh 36g of ethyl orthosilicate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution I. Weigh 43g of butyl titanate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution II. Weigh 1.96g cesium carbonate, 0.95g zirconium nitrate, 0.16g potassium nitrate, add deionized water and ethanol, stir for 10min, and make solution III. Solution I and solution II were added dropwise and mixed, then added to solution III, stirred at 110°C for 24 hours, washed and filtered to obtain a filter cake. The filter cake was dried in an oven at 110°C for 4 hours, extruded or ball-rolled after drying, and calcined at 500°C for 4 hours to obtain an aldol condensation catalyst.

Embodiment 3

[0033] Weigh 63g of ethyl orthosilicate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution I. Weigh 9g of butyl titanate, slowly add it into absolute ethanol at room temperature, stir for 20min, and configure colloidal solution II. Weigh 1.47g cesium carbonate and 0.95g zirconium nitrate, add deionized water and ethanol, stir for 10min, and make solution III. Solution I and solution II were added dropwise and mixed, then added to solution III, stirred at 110°C for 24 hours, washed and filtered to obtain a filter cake. The filter cake was dried in an oven at 110°C for 4 hours, extruded or ball-rolled after drying, and calcined at 500°C for 4 hours to obtain an aldol condensation catalyst.

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Abstract

The invention relates to a complex carrier catalyst for aldol condensation, and a preparation method and application of the complex carrier catalyst. The complex carrier catalyst is prepared by taking a composite carrier of SiO2 and TiO2 as a carrier, taking Cs as an active component and taking M as an active auxiliary agent; the complex carrier catalyst is prepared from 4-20% of the Cs, 0.05-10% of the M and the balance of the carrier by mass percent, wherein M is one or more selected from Na, K, Mg, Ca, Ba, La, Zr, Sr or Sb. Compared with the prior art, the complex carrier catalyst has good reaction activity and obviously delays coking; the preparation method remarkably improves the stability of the catalyst and is simple in preparation technology; the complex carrier catalyst can be used for preparing methyl methacrylate from formaldehyde and methyl propionate.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a composite carrier catalyst and a preparation method, in particular to a composite carrier catalyst for aldol condensation, a preparation method and an application. Background technique [0002] Methyl methacrylate (MMA) is an important organic chemical raw material, also known as plexiglass monomer, widely used in the preparation of plexiglass, coatings, emulsion resins, adhesives, pharmaceutical polymer materials, leather treatment Agents and insulating potting materials, etc., with a wide range of product applications and market space. [0003] According to different sources of raw materials, the main production methods of MMA are C 2 method (Alpha method), C 3 method (ACH method), C 4 method (isobutene / tert-butanol method). At present, the production method used in the production of MMA is mainly the ACH method. However, hydrocyanic acid, the raw material of ACH, is hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04B01J23/10C07C69/54C07C67/343
CPCB01J23/002B01J23/04B01J23/10C07C67/343C07C69/54
Inventor 贺俊骆念军
Owner PUJING CHEM IND SHA
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