RU2013125190A

RU2013125190A - METHOD FOR PRODUCING SODIUM SILICON FLUORIDE

Info

Publication number: RU2013125190A
Application number: RU2013125190/05A
Authority: RU
Inventors: Тагир Вильданович Шарипов; Ахат Газизьянович Мустафин; Гульназ Садрихановна Кинзябулатова; Дим Иделович Шаяхметов; Камиль Раилевич Шангараев; Алина Ильдаровна Дельмухаметова
Priority date: 2013-05-30
Filing date: 2013-05-30
Publication date: 2014-12-10
Also published as: RU2543172C2

Abstract

1. Способ получения кремнефторида натрия, включающий взаимодействие кремнефтористоводородной кислоты и смеси натрийсодержащих соединений, отделение продукта, его промывку и сушку, отличающийся тем, что в качестве смеси натрийсодержащих соединений используют водный раствор плотностью 1,1-1,13 г/смсмеси хлорида, сульфата и гидроксида натрия, взятых в массовом соотношении (6-12):(0,5-2):1; смесь натрийсодержащих соединений берут в количестве 110-120% от стехиометрически необходимого на взаимодействие с кремнефтористоводородной кислотой; а взаимодействие реагентов проводят непрерывным методом при температуре 0-50°C в течение 15-30 мин с получением суспензии; далее суспензию отстаивают, маточный раствор отделяют декантацией с получением пульпы; пульпу разбавляют водой в объемном соотношении 1:1 и фильтруют; осадок продукта промывают водой и сушат.2. Способ получения кремнефторида натрия по п.1, отличающийся тем, что в качестве смеси натрийсодержащих соединений берут отход производства каустической соды, предварительно разбавленной водой в объемном соотношении 1:1.1. A method of producing sodium silicofluoride, including the interaction of hydrofluoric acid and a mixture of sodium-containing compounds, product separation, washing and drying, characterized in that as a mixture of sodium-containing compounds using an aqueous solution with a density of 1.1-1.13 g / cm mixture of chloride, sulfate and sodium hydroxide taken in a mass ratio of (6-12) :( 0.5-2): 1; a mixture of sodium-containing compounds is taken in an amount of 110-120% of the stoichiometrically necessary for interaction with hydrofluoric acid; and the interaction of the reagents is carried out by a continuous method at a temperature of 0-50 ° C for 15-30 minutes to obtain a suspension; then the suspension is defended, the mother liquor is separated by decantation to obtain pulp; the pulp is diluted with water in a volume ratio of 1: 1 and filtered; the product precipitate is washed with water and dried. 2. The method of producing sodium silicofluoride according to claim 1, characterized in that as a mixture of sodium-containing compounds take the production waste of caustic soda, pre-diluted with water in a volume ratio of 1: 1.

Claims

1. A method of producing sodium silicofluoride, including the interaction of hydrofluoric acid and a mixture of sodium-containing compounds, separation of the product, washing and drying thereof, characterized in that an aqueous solution of a density of 1.1-1.13 g / cm ^{3 of a} mixture of chloride is used as a mixture of sodium-containing compounds sulfate and sodium hydroxide taken in a mass ratio (6-12) :( 0.5-2): 1; a mixture of sodium-containing compounds is taken in an amount of 110-120% of the stoichiometrically necessary for interaction with hydrofluoric acid; and the interaction of the reagents is carried out by a continuous method at a temperature of 0-50 ° C for 15-30 minutes to obtain a suspension; then the suspension is defended, the mother liquor is separated by decantation to obtain pulp; the pulp is diluted with water in a volume ratio of 1: 1 and filtered; the product precipitate is washed with water and dried.

2. The method of producing sodium silicofluoride according to claim 1, characterized in that as a mixture of sodium-containing compounds take the waste of production of caustic soda, pre-diluted with water in a volume ratio of 1: 1.