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A method of preparing a shaped catalyst, the catalyst, and use of the catalyst

A catalyst, epoxidation technology, applied in preparation 1, can solve problems such as catalyst performance degradation

Inactive Publication Date: 2007-08-22
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] During normal operation, this catalyst also experiences degradation related to aging
Declining catalyst activity evidences aging itself

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] Shaped catalysts A, B, C, and D were prepared as follows and contained 20 wt% silver, 3 mmol rhenium / kg, 1.5 mmol tungsten / kg, 20 mmol lithium / kg, and 3.4 mmol cesium / kg based on the weight of the catalyst.

[0070] Silver-1,2-ethylenediamine-oxalate stock solution was prepared by using the procedure listed in US-A-4766105, column 17, line 50 - column 18, line 25, hereby incorporated by reference Incorporate said patent. The resulting solution contained about 30 wt% silver.

[0071] A solution of silver oxide followed by ammonium perrhenate, ammonium metatungstate, cesium hydroxide and lithium hydroxide in a small amount of water was added to a 40 ml sample of the stock solution. The resulting slurry was added to 120 g of alpha-alumina powder (obtained from ALCOA / ALMATIS (Ludwigshafen, Germany), type CL2500 SG) to form a dough. The dough contained about 24% liquid by weight relative to the weight of the dough. The contents of silver oxide, ammonium perrhenate, ammoni...

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Abstract

A method of preparing a shaped catalyst, which method comprises moulding a dough into shaped particles and drying at least a portion of the shaped particles at a temperature below 1000 DEG C, wherein the dough comprises a support material, or a precursor thereof, and a silver component; the shaped catalyst, and a use of the shaped catalyst.

Description

technical field [0001] The invention relates to a process for the preparation of shaped catalysts and to shaped catalysts obtainable by this process. The present invention also relates to a process for epoxidation of olefins comprising contacting a feedstock comprising olefins and oxygen with a shaped catalyst. The invention also relates to a process for preparing 1,2-diols, 1,2-diol ethers or alkanolamines using the alkylene oxides thus produced. Background technique [0002] During olefin epoxidation, olefins react with oxygen in the presence of silver-based catalysts to form olefin epoxides. Alkylene oxides can react with water, alcohols or amines to form 1,2-diols, 1,2-diol ethers or alkanolamines. 1,2-diols, 1,2-diol ethers and alkanolamines can thus be produced in a multi-step process involving epoxidation of olefins and conversion of the rings formed with water, alcohols or amines Oxyalkane. [0003] Conventional silver-based catalysts provide alkylene oxides with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J23/68C07D301/10B01J35/00
CPCB01J23/688B01J35/026B01J35/002B01J23/66B01J21/04B01J23/50C07D301/10C07D301/08B01J37/0009B01J35/40B01J35/55B01J35/38B01J35/37B01J2235/00B01J23/68B01J37/08B01J35/50
Inventor 董丁涵卢江N·T·韦
Owner SHELL INT RES MAATSCHAPPIJ BV