Patent EP0021571A1 successfully refreshed from Google Patents.
EP0021571A1
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Oil dispersants
Assignee: Imperial Chemical Industries Ltd
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Filing: 1980-05-06
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Granted: —
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Expires: 2000-05-06
Abstract
Abstract An oil dispersant comprises a compound which contains at least three polyglycol residues (e.g. a hexamethylene diamine/ethylene and propylene oxide condensate) a non-ionic surfactant and a solvent for these materials which is soluble in oil.
Inventors
- 👤 Roger Ian Hancock
- 👤 Peter Leslie Cornes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:31
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32; C02; C02F; C02F1/00; C02F1/68; C02F1/682; C09K23/00; C09K23/017
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
An oil dispersant which comprises (1) at least one compound which comprises at least 3 polyglycol residues each of which residues comprises 10 to 40 propylene oxide residues and 3 to 40 ethylene oxide residues and has 15 to 60 propylene and ethylene oxide residues in total per polyglycol residue, (2) a non-ionic surfactant which is a condensation product of propylene oxide and/or ethylene oxide with an alcohol having 10 to 20 carbon atoms, an alkyl phenol having a total of 4 to 16 carbon atoms in its alkyl group or groups, a carboxylic acid having 10 to 20 carbon atoms or an amine or amide having 10 to 20 carbon atoms, the alcohol,acid, amine or amide having one or two functional groups each of which is condensed with from 2 - 20 propylene and/or ethylene oxide groups and (3) a solvent for (1) and (2) which is miscible with oil.
Claim 2
Dependent Claim
151 words
An oil dispersant which comprises (1) at least one compound which comprises at least 3 polyglycol residues each of which residues comprises 10 to 40 propylene oxide residues and 3 to 40 ethylene oxide residues and has 15 to 60 propylene and ethylene oxide residues in total per polyglycol residue, (2) a non-ionic surfactant which is a condensation product of propylene oxide and/or ethylene oxide with an alcohol having 10 to 20 carbon atoms, an alkyl phenol having a total of 4 to 16 carbon atoms in its alkyl group or groups, a carboxylic acid having 10 to 20 carbon atoms or an amine or amide having 10 to 20 carbon atoms, the alcohol,acid, amine or amide having one or two functional groups each of which is condensed with from 2 - 20 propylene and/or ethylene oxide groups and (3) a solvent for (1) and (2) which is miscible with oil.
Claim 3
Dependent Claim
37 words
An oil dispersant as claimed in Claim 1 in which each polyglycol residue of the compound which comprises at least 3 polyglycol residues comprises 10 to 25 propylene oxide residues and 5 to 25 ethylene oxide residues.
Claim 4
Dependent Claim
80 words
An oil dispersant as claimed in Claim 1 or 2 in which the non-ionic surfactant is a product of condensation an aliphatic amine, amide carboxylic acid or alcohol which comprises a straight carbon chain with at most 2 carbon atoms in side chains and which comprises at most 2 carbon to carbon double bonds with propylene oxide and ethylene oxide, the ratio of propylene oxide to ethylene oxide residues being in the ratio 1 : 10 to 10 : 1.
Claim 5
Dependent Claim
29 words
An oil dispersant as claimed in any preceding claim in which the non-ionic surfactant is a condensation product of a mono functional compound with propylene oxide and/or ethylene oxide.
Claim 6
Dependent Claim
76 words
An oil dispersant as claimed in any preceding claim in which the compound (1) is a condensation product of ethylene and propylene oxide with a polyamine of formula H 2 H [(CH 2 ) n NH] p H in which n is an integer having a value of 1 - 12, and p is an integer having a value of 1 -100 or with a para alkyl phenol/formaldehyde condensate having 3 to 12 alkyl phenol groups.
Claim 7
Dependent Claim
25 words
An oil dispersant as claimed in Claim 5 in which the compound (1) is a condensation product of ethylene and propylene oxide with hexamethylene diamine.
Claim 8
Dependent Claim
60 words
A composition as claimed in any preceding claim in which the non-ionic surfactant comprises ethylene oxide and/or propylene oxide residues to the extent of 20 to 60% by weight of the total molecule, the amine, alcohol, acid,phenol or amide residues comprises the remainder of the molecule, and in which the total molecular weight of the molecule is 100 to 600.
Claim 9
Dependent Claim
60 words
An oil dispersant as claimed in any preceding claim in which the solvent comprises a condensate of propylene oxide and/or ethylene oxide with an alcohol having 1 to 8 carbon atoms which contains from 1 to 20 ethylene oxide and/or propylene oxide groups, together with one or more aliphatic or alicyclic hydrocarbons or alcohols having 8 to 30 carbon atoms.
Claim 10
Dependent Claim
25 words
An oil dispersant as claimed in Claim 8 in which the ethylene oxide and propylene oxide are present in a ratio of 1:10 to 10:1.
Claim 11
Independent Claim
31 words
A method of claiming an oil tank, the sea or a beach contaminated with oil which comprises applying a dispersant as claimed in any of claims 1 to 10 to it.
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