Patent ID: 8012445
Filing Date: 2011-09-06
Classification: B82Y,C01F,C01P,C09C

Abstract:
1. A method for producing a calcium carbonate product in one or several sequential precipitation reactors, said method comprising: feeding carbon dioxide into a precipitation vessel of a precipitation reactor, feeding calcium hydroxide (Ca(OH) maintaining a temperature in said precipitation vessel of less than 65° C., either a) by cooling said precipitation reactor by means of cooling elements, or b) by circulating a material which contains calcium carbonate, and/or a gas which contains carbon dioxide, to a cooler from said precipitation vessel and back to said precipitation vessel from said cooler, and precipitating calcium carbonate particles having a size of less than 100 nm in said precipitation vessel, wherein the calcium hydroxide, or other corresponding Ca wherein said disintegration and spraying apparatus operates on the principle of a pin mill.