EP0087277A2
Expired / Lapsed
EP
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Polyamides and anti-fouling compositions containing them
Assignee: BP PLC
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Filing: 1983-02-18
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Granted: —
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Expires: 2003-02-18
Abstract
Abstract Novel liquid polyamides of formula RCONH(CH 2 CH 2 NH) n -OCR where R is alkyl or alkenyl with 10 to 22 carbon atoms and n is an integer in the range 1 to 4 may be used in compositions to reduce fouling on heat exchange surfaces.
Inventors
- 👤 Colin Antony Pipe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:01
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; C23; C23F; C23F14/00; C23F14/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
31 words
A liquid polyamide of formula: wherein R is an alkyl or alkenyl group containing 10 to 22 carbon atoms, and n is an integer in the range 1 to 4 inclusive.
Claim 2
Dependent Claim
31 words
A liquid polyamide of formula: wherein R is an alkyl or alkenyl group containing 10 to 22 carbon atoms, and n is an integer in the range 1 to 4 inclusive.
Claim 3
Dependent Claim
18 words
A polyamide according to claim 1 wherein R is alkenyl containing 17 carbon atoms, and n = 2.
Claim 4
Dependent Claim
43 words
A process for producing a polyamide wherein a liquid carboxylic acid of formula RC0 2 H and a polyamine of formula NH 2 (CH 2 CH 2 NH) n H are heated together in solution in a molar ratio of 1:1 to 3:1.
Claim 5
Dependent Claim
43 words
A process for producing a polyamide wherein a liquid carboxylic acid of formula RC0 2 H and a polyamine of formula NH 2 (CH 2 CH 2 NH) n H are heated together in solution in a molar ratio of 1:1 to 3:1.
Claim 6
Dependent Claim
14 words
A process according to claim 3 wherein the molar ratio is 1:8.1 to 2.2:1.
Claim 7
Dependent Claim
17 words
An anti-fouling composition comprising a polyamide according to claims 1 or 2 and an oil soluble emulsifier.
Claim 8
Dependent Claim
48 words
An anti-fouling additive composition comprising a polyamide according to claims 5 and an emulsifier of formula R'COOCH Z (CHOH) m CH 2 0H wherein R'is an alkyl or alkenyl group containing 10 to 22 carbon atoms, and m is an integer in the range 1 to 4 inclusive.
Claim 9
Dependent Claim
14 words
An anti-fouling additive composition according to claim 6 wherein the emulsifier is sorbitan monooleate.
Claim 10
Dependent Claim
25 words
An anti-fouling additive according to any one of the claims 5 to 7 wherein the weight ratio of polyamide to emulsifier is 3.5:1 to 4.5:1.
Claim 11
Dependent Claim
20 words
An anti-fouling additive comprising a polyamide according to any one of claims 1 to 3 and a hindered phenolic antioxidant.
Claim 12
Dependent Claim
19 words
An anti-fouling additive according to claim 9 wherein the weight ratio of polyamide to anti-oxidant is 4:1 to 1:4.
Claim 13
Dependent Claim
19 words
An anti-fouling additive comprising a polyamide according to any one of claims 1 to 3 and a film-forming agent.
Claim 14
Dependent Claim
37 words
A process for exchanging heat with a hot petroleum material, containing an anti-fouling additive, through a heat exchange surface characterised in that the anti-fouling additive comprises a polyamide according to any one of claims 1 to 3.
References Cited (Backward Citations)
No citation records indexed.
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