EP0003642A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Production of olefine oxides
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1979-01-19
•
Granted: —
•
Expires: 1999-01-19
Abstract
Abstract Olefine oxides are produced by contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine-containing reaction modifier; the performance of the catalyst is improved by contacting it with a nitrate or nitrite forming substance for example nitric oxide.
Inventors
- 👤 Percy Hayden
- 👤 Richard William Clayton
- 👤 John Richard Bamforth
- 👤 Alan Frank George Cope
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; B01J23/38; B01J23/48; B01J23/50; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A process of producing an olefine oxide which comprises contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine containing reaction modifier in which the performance of the catalyst is improved by contacting the catalyst also with a nitrate or nitrite forming substance which is in a gas phase.
Claim 2
Dependent Claim
54 words
A process of producing an olefine oxide which comprises contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine containing reaction modifier in which the performance of the catalyst is improved by contacting the catalyst also with a nitrate or nitrite forming substance which is in a gas phase.
Claim 3
Dependent Claim
61 words
A process of producing an olefine oxide which comprises contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine containing reaction modifier in which the performance of the catalyst is improved by contacting the catalyst with a gas comprising N 2 0 4 and/or N0 2 and/or a nitrogen containing compound together with an oxidising agent.
Claim 4
Dependent Claim
61 words
A process of producing an olefine oxide which comprises contacting an olefine with oxygen in the presence of a silver-containing catalyst and a chlorine containing reaction modifier in which the performance of the catalyst is improved by contacting the catalyst with a gas comprising N 2 0 4 and/or N0 2 and/or a nitrogen containing compound together with an oxidising agent.
Claim 5
Dependent Claim
13 words
A process according to Claim 2 in which the oxidising agent is oxygen.
Claim 6
Dependent Claim
16 words
A process as claimed in Claim 1, 2 or 3 in which the olefine is ethylene.
Claim 7
Dependent Claim
27 words
A process as claimed in any preceding Claim in which the chlorine containing reaction modifier is a compound containing 1 to 10 carbon atoms, hydrogen and chlorine.
Claim 8
Dependent Claim
23 words
A process as claimed in any preceding Claim in which N0 2 , N 2 0 4 and/or NO and oxygen is used.
Claim 9
Dependent Claim
110 words
A process as claimed in any preceding Claim in which the catalyst comprises 3 to 50% by weight of silver supported on a porous heat resisting support which has a surface area in the range 0.05 to 10 m 2 /g as measured by the Brunauer Emmett & Teller method, an apparent porosity as measured by the mercury absorption method of at least 20%,mean pore diameters of 0.1 to 20 microns as measured by the mercury porosimetry method and most of the silver judged in terms of numbers of silver particles is present in the form of discrete particles adhering to the support having equivalent diameters of less than 10,000Å.
Claim 10
Dependent Claim
35 words
A process as claimed in any preceding Claim in which the catalyst comprises cations present as the corresponding nitrate or nitrite or in a form capable of reacting to produce the corresponding nitrate or nitrite.
Claim 11
Dependent Claim
29 words
A process as claimed in any preceding Claim in which the catalyst comprises a) cesium and/or rubidium and/or b) sodium and/or potassium as compounds which are extractable by water.
Claim 12
Dependent Claim
42 words
A process as claimed in any preceding Claim in which the nitrate or nitrite forming substance is supplied continuously to the process in a concentration of 0.2 to 200 parts per million of N0 2 equivalent of the process gas by volume.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.