Flocculating and sedimentation agents, and method for the...

B - Operations – Transporting – 01 – D

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B01D 21/01 (2006.01) C01B 33/142 (2006.01) C01B 33/187 (2006.01) C01B 33/26 (2006.01) C01B 33/32 (2006.01) C01B 33/40 (2006.01) C02F 1/52 (2006.01)

Patent

CA 2533840

Disclosed is an alkali aqueous flocculating agent based on an alkali aqueous salt clay extract containing dissolved silicate and aluminate, in addition to alkali chloride whereby for an aluminate (1) content by weight expressed as AI(OH)3, 1.) approximately 2 to 3 parts by weight of silicate expressed as Si02 are provided and 2) at least approximately (10) parts by weight, especially at least (20) parts by weight of alkali chloride are provided, in addition to a flocculating and a sedimentation agent in the form of an acidic and alkali- extracted salt clay. The invention further relates to a method for the production of said flocculating and sedimentation agents which can be used advantageously in swimming baths, for the treatment of drinking water, industrial water, grey water and waste water in sewage treatment plants as auxiliary agents for absorption, sedimentation and filtration. Said agents can also be used to reduce the amount of harmful substances and to embellish water in swimming pools, ponds and biotopes. The respective flocculating agent is more particularly used by means of dosing systems. One particular advantage of the invention is that the agent is obtained from a natural product and can be used in swimming pools and water biotopes without any harmful side effects.

L'invention concerne un agent floculant aqueux alcalin à base d'un extrait aqueux alcalin d'argile salifère contenant des aluminates et silicates dissous ainsi que du chlorure alcalin. Selon l'invention, pour 1 partie en poids d'aluminate de formule Al(OH)¿3?, il y a : 1.) approximativement 2 à 3 parties en poids de silicate de formule SiO¿2?, et 2.) au moins approximativement 10 parties en poids, en particulier au moins 20 parties en poids, de chlorure alcalin. Cette invention se rapporte également à un agent de floculation et de sédimentation se présentant sous la forme d'un argile salifère à extraction acide et alcaline. La présente invention concerne en outre un procédé de production de cet agent de floculation et de sédimentation. Les agents floculants selon l'invention peuvent être utilisés de manière avantageuse : dans des installations de piscine ; dans le traitement de l'eau potable, le traitement industriel, le traitement des eaux grises et le traitement des eaux usées ; dans des installations d'épuration des eaux usées en tant qu'agents d'absorption, de sédimentation et de filtrage, et ; pour réduire les substances nuisibles et améliorer l'aspect de l'eau se trouvant dans des bassins de natation, des étangs et des biotopes, l'agent floculant respectif étant utilisé en particulier à l'aide d'installations de dosage. L'avantage spécifique de cette invention réside dans le fait que l'agent est produit à partir d'une substance naturelle et peut donc être employé dans des bassins de baignade et des biotopes aquatiques sans présenter d'effet secondaire nuisible.

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