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EP0200403A1
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EP
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Preparation of alkoxy halides
Assignee: BP PLC
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Filing: 1986-04-11
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Granted: —
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Expires: 2006-04-11
Abstract
Abstract Alkyl-, aryl- or alkylaryl-alkoxy halides are prepared by reacting the corresponding alkoxy alcohol with a halogenating agent, e.g., thionyl chloride, in the presence of an amide as catalyst. In addition to being faster, the catalysed reaction results in an increased yield of desired product and a decrease in the tendency of the polyoxyalkylene chain to cleave.
Inventors
- 👤 Philip Kenneth Gordon Hodgson
- 👤 Nevin John Stewart
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:41
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/18; C07C41/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
173 words
A process for the production of an alkyl-, aryl- or alkylaryl-alkoxy halide which process comprises reacting an alkyl, aryl, or alkylaryl alkoxy alcohol of formula: R-(OR 1 ) m OH wherein R is an alkyl group containing 1 to 24 carbon atoms, a phenyl group, or an alkylaryl group of formula: wherein R 2 is an alkyl group containing 1 to 24 carbon atoms and R 3 and R 4 are hydrogen atoms, or R 2 and R 3 are both alkyl groups containing 1 to 12 carbon atoms and R 4 is a hydrogen atom, or R 2 , R 3 and R 4 are each alkyl groups wherein the sum of the number of carbon atoms in the groups is in the range 3 to 24; R 1 is an alkylene group containing 2 or 3 carbon atoms; and m is a number in the range 1 to 15, with a halogenating agent, characterised by the fact that the reaction is carried out in the presence of an amide as catalyst.
Claim 2
Dependent Claim
173 words
A process for the production of an alkyl-, aryl- or alkylaryl-alkoxy halide which process comprises reacting an alkyl, aryl, or alkylaryl alkoxy alcohol of formula: R-(OR 1 ) m OH wherein R is an alkyl group containing 1 to 24 carbon atoms, a phenyl group, or an alkylaryl group of formula: wherein R 2 is an alkyl group containing 1 to 24 carbon atoms and R 3 and R 4 are hydrogen atoms, or R 2 and R 3 are both alkyl groups containing 1 to 12 carbon atoms and R 4 is a hydrogen atom, or R 2 , R 3 and R 4 are each alkyl groups wherein the sum of the number of carbon atoms in the groups is in the range 3 to 24; R 1 is an alkylene group containing 2 or 3 carbon atoms; and m is a number in the range 1 to 15, with a halogenating agent, characterised by the fact that the reaction is carried out in the presence of an amide as catalyst.
Claim 3
Dependent Claim
38 words
A process according to claim 1 wherein R is an alkylaryl group of formula wherein R 2 is an alkyl group containing 8 to 20 carbon atoms and m is a number in the range 4 to 10.
Claim 4
Dependent Claim
20 words
A process according to either of the preceding claims wherein the catalyst is an aliphatic amide, a phosphoramide or urea.
Claim 5
Dependent Claim
14 words
A process according to claim 3 wherein the aliphatic amide is N,N-dimethylformamide or acetamide.
Claim 6
Dependent Claim
19 words
A process according to any of the preceding claims wherein the halogenating agent is thionyl chloride or sulphuryl chloride.
Claim 7
Dependent Claim
24 words
A process according to any of the preceding claims wherein the halogenation reaction is effected at a temperature in the range 30° to 120°C.
Claim 8
Dependent Claim
26 words
A process according to any of the preceding claims wherein the molar ratio of alkoxy alcohol to halogenating agent is in the range 1:1 to 1:5.
Claim 9
Dependent Claim
34 words
A process according to any of the preceding claims wherein the quantity of catalyst employed is in the range 0.1% to 5X by weight, expressed as a percentage by weight of the alkoxy alcohol.
References Cited (Backward Citations)
CH385386A
Cited
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