METHOD FOR PRODUCING DUOLITE Russian patent published in 2021 - IPC B01J20/16 B01J20/30 

FIELD: producing duolite.

SUBSTANCE: invention relates to a method for producing duolite, in which vermiculite is heated at a temperature of 1000-1100°C for 5-10 minutes, resulting in expanded vermiculite, which is heated under a pressure of 2.5-3 atm for 20-30 minutes at a temperature of 150-200°C with the addition of 3% caustic soda and 5% technical salt, and for one ton of expanded vermiculite, 30 kg of 3% caustic soda and 50 kg of 5% technical salt are taken.

EFFECT: method for producing duolite with low energy consumption is developed, in which a powdered ion-exchange filter product is obtained for filtering heavy metals and harmful impurities in liquids in many sectors of the national economy with any water treatment methods, both in the food industry and in industrial production, where it is necessary to improve the quality of water or other liquid.

1 cl, 1 dwg, 1 tbl, 1 ex