Patent ID: 9382128
Filing Date: 2016-07-05
CPC Classification: B01J,B82Y,C01G,C01P,C09C,C09D

Claim Text:
1. A process for producing a concentrated nanotitania sol comprising: (a) providing an acidic nano titania sol; (b) contacting the acidic nano titania sol with (i) a dispersant comprising at least one of a water soluble carboxylic acid, a water soluble salt of a carboxylic acid, a water soluble polycarboxylic acid, a phosphate or a silicate, and (ii) an alkalizing agent wherein the pH of the nano titania sol after contacting is in a range of between about 4.0 and about 10.0; and (c) subjecting the pH adjusted nano titania sol to membrane filtration and continuing such membrane filtration until the nano titania sol contains more than 300 g TiO