METHOD AND DEVICE FOR MAKING PRODUCT CONTAINING CALCIUM CARBONATE, SAID PRODUCT AND USE THEREOF Russian patent published in 2010 - IPC C01F11/18 C09C1/02 B01J10/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in pharmaceutical, medical, cosmetic, food and chemical industry, in production of plastic, rubber, pigments and paper. The method of producing a product which contains calcium carbonate in form of fine particles in one or more series precipitation reactors involves feeding calcium hydroxide in form of droplets and/or particles into a gas which contains carbon dioxide inside the precipitation reactor. Calcium hydroxide is fed through grinding and spraying devices working on the rod mill principle, placed inside the reactor or connected to the reactor. Temperature of the precipitation reactor is kept below 65°C due to installation in the reactor of cooling elements and/or material containing calcium carbonate and/or carbon dioxide-containing gas which circulates to the cooling device from the precipitation reactor and back to the precipitation reactor. Proposed also is a product which contains calcium carbonate and a device for making the said product.

EFFECT: invention enables to obtain fine calcium carbonate particles with size less than 100 nm and specific surface area greater than 20 m²/g, reduction of temperature and calcium precipitation time, increased degree of carbonisation of calcium hydroxide.

20 cl, 7 dwg, 1 tbl, 4 ex