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Process for preparing a catalyst, the catalyst, and a use of the catalyst

A technology for olefin oxides and catalysts, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low selectivity of olefin oxides and catalyst performance degradation

Inactive Publication Date: 2007-04-11
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional silver-based catalysts provide very low selectivity to olefin oxides
Furthermore, during normal operation, catalysts are prone to undergo aging-related performance degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Table I gives information on the properties and geometry of Support I used in the preparation of the catalysts as described in these examples. Vector II represents another suitable vector for use in the present invention.

[0066] Carrier I

Carrier II

performance

Water absorption (%)

Bulk density (kg / m 3 )

ASTM wear loss rate (%)

Average plate crushing strength (N)

Surface area (m 2 / g)

46.5

843

14.7

130

0.77

50.4

788

16.5

180

0.78

geometry structure

Nominal size (mm)

Average length (mm)

Length Range(mm)

diameter (mm)

inner diameter(mm)

Length / Outer Diameter Ratio

8

7.7

6.6-8.6

8.6

1.02

0.90

8

7.7

6.6-8.6

8.6

1.02

0.90

[0067] Catalyst preparation

[0068] Catalyst A (for comparison)

[0069] Catalyst A was prepared in a...

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PUM

PropertyMeasurementUnit
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Abstract

A process for preparing a catalyst comprising silver, a rhenium component, and a rhenium co-promoter on a support, which process comprises depositing the rhenium co-promoter on the support prior to or simultaneously with depositing silver on the support, and depositing the rhenium component on the support after depositing silver on the support; the catalyst; and a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the catalyst.

Description

technical field [0001] The present invention relates to a process for preparing a highly selective olefin epoxidation catalyst, the catalyst itself, and a process for olefin epoxidation in which the catalyst is used. Background technique [0002] In olefin epoxidation, a silver-based catalyst is used to react olefins with oxygen to form olefin epoxides. Olefin oxides can react with water, alcohols or amines to form 1,2-diols, 1,2-diol ethers or alkanolamines. Thus, 1,2-diols, 1,2-diol ethers and alkanolamines can be produced in a multi-step process comprising epoxidation of olefins and conversion of the olefins formed with water, alcohols or amines oxide. [0003] Conventional silver-based catalysts provide very low selectivity to olefin oxides. Furthermore, during normal operation, catalysts are prone to undergo aging-related performance degradation. Aging manifests itself by a decrease in catalyst activity. Usually when a decrease in activity of the catalyst is manife...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/68B01J37/02C07D301/10C07C213/04B01J23/652C07C29/10C07C29/14C07C41/03
CPCB01J37/0205C07C29/106B01J23/6527B01J23/688C07D301/10Y02P20/52C07C31/202B01J23/68B01J37/02C07C213/04
Inventor J·R·洛克迈耶R·C·耶茨
Owner SHELL INT RES MAATSCHAPPIJ BV