EP0156138A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for the reduction of the viscosity of high solids TiO2 pigment slurries
Assignee: Wyeth Holdings LLC
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Filing: 1985-02-11
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Granted: —
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Expires: 2005-02-11
Abstract
Abstract A process for the reduction of the viscosity of high solids pigment slurries is disclosed whereby the slurries are subjected to electrodialysis utilizing an ammonium salt or dilute acid solution as the anolyte.
Inventors
- 👤 Earl Rudolph Lawhorne
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 21:49
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; C; C09; C09D; C09D17/00; C09D17/004; C09D17/007; C09D17/008; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/385
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
A method which comprises a) placing a high solids content aqueous pigment slurry into a cathode compartment separated from an anode compartment by a low porosity permeable membrane, b) placing an ammonium salt or dilute acid anolyte solution in said anode compartment, c) passing electric current through said cathode and anode compartments and d) recovering the resultant pigment slurry, whereby said slurry is of a reduced viscosity.
Claim 2
Independent Claim
67 words
A method which comprises a) placing a high solids content aqueous pigment slurry into a cathode compartment separated from an anode compartment by a low porosity permeable membrane, b) placing an ammonium salt or dilute acid anolyte solution in said anode compartment, c) passing electric current through said cathode and anode compartments and d) recovering the resultant pigment slurry, whereby said slurry is of a reduced viscosity.
Claim 3
Dependent Claim
13 words
A method according to Claim 1 wherein said pigment is Ti0 2 .
Claim 4
Dependent Claim
14 words
A method according to Claim 1 wherein said anolyte is an ammonium salt solution.
Claim 5
Dependent Claim
14 words
A method according to Claim 1 wherein said anolyte is a dilute acid solution.
Claim 6
Dependent Claim
19 words
A method according to Claim 2 wherein said slurry is produced from undercalcined Ti0 2 from the sulfate process.
References Cited (Backward Citations)
No citation records indexed.
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