Patent EP0174509A2 successfully refreshed from Google Patents.
EP0174509A2
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EP
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A dispersing agent for coal-water slurry
Assignee: Kuraray Co Ltd
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Filing: 1985-08-12
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Granted: —
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Expires: 2005-08-12
Abstract
Abstract A dispersing agent for coal-water slurry comprising a polyelectrolyte made from a modified x-olefin-maleic anhydride copolymer which has a long hydrocarbon residue at the end of the molecule or in the main chain and gives a coal-water slurry of excellent fluidity and excellent stability.
Inventors
- 👤 Harumasa C/O Tajimayama-Ryo Doi
- 👤 Hirotoshi Miyazaki
- 👤 Kunio Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
C; C09; C09K; C09K23/00; C09K23/12; C10; C10L; C10L1/00; C10L1/32; C10L1/326
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
179 words
A dispersing agent for a coal-water slurry, comprising a polyelectrolyte made by reacting an alkali metal compound, an alkali earth metal compound, ammonia or an amine with a modified α-olefin-maleic anhydride copolymer comprising a structural unit [I] based on the α-olefin, a structural unit [II] based on maleic anhydride and a modified structural unit selected from the group consisting of [A] a terminal group [III] of the general formula wherein R 1 represents a hydrocarbon residue having 4 to 30 carbon atoms, and [B] a structural unit [IV] of the general formula wherein R 2 represents a hydrocarbon residue having 4 to 30 carbon atoms and n is zero or 1, the structural unit [IV] being contained in the main chain , the molar ratio of the unit [IV] to the unit [II] ranging from 0.005 to 0.2, said copolymer containing units [I] and [II] in such an amount that the molar ratio unit [I] to unit [II] is in the range of from 0.8 to 3.0 and having a weight average molecular weight of 1 ,000 to 20,000.
Claim 2
Dependent Claim
179 words
A dispersing agent for a coal-water slurry, comprising a polyelectrolyte made by reacting an alkali metal compound, an alkali earth metal compound, ammonia or an amine with a modified α-olefin-maleic anhydride copolymer comprising a structural unit [I] based on the α-olefin, a structural unit [II] based on maleic anhydride and a modified structural unit selected from the group consisting of [A] a terminal group [III] of the general formula wherein R 1 represents a hydrocarbon residue having 4 to 30 carbon atoms, and [B] a structural unit [IV] of the general formula wherein R 2 represents a hydrocarbon residue having 4 to 30 carbon atoms and n is zero or 1, the structural unit [IV] being contained in the main chain , the molar ratio of the unit [IV] to the unit [II] ranging from 0.005 to 0.2, said copolymer containing units [I] and [II] in such an amount that the molar ratio unit [I] to unit [II] is in the range of from 0.8 to 3.0 and having a weight average molecular weight of 1 ,000 to 20,000.
Claim 3
Dependent Claim
17 words
The dispersing agent according to claim 1 wherein the α-olefin is an α-olefin having 4 carbon atoms.
Claim 4
Dependent Claim
12 words
The dispersing agent according to claim 1 wherein the α-olefin is isobutylene.
Claim 5
Dependent Claim
20 words
The dispersing agent according to claim 1 wherein R 1 is an alkyl group having 4 to 30 carbon atoms.
Claim 6
Dependent Claim
20 words
The dispersing agent according to claim 1 wherein R 2 is an alkyl group having 4 to 30 carbon atoms.
Claim 7
Dependent Claim
18 words
6 . A coal-water slurry containing coal, water and dispersing agent comprising a polyelectrolyte according to claim 1.
References Cited (Backward Citations)
No citation records indexed.
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