WATER CLARIFICATION COMPOSITION CONTAINING AMPHOTERIC POLYMER

• Main Authors: ROYCHOWDHURY, Sumana, RAMAN, Srinivasa, Gopalan, PRAMANIK, Amitava
• Format: Patent
• Language: English; French; German
• Published: 25.03.2020
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RECOVERY OF GLYCEROL; RESIN SOAPS; SEPARATION; SOAP OR SOAP-MAKING; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; USE OF SINGLE SUBSTANCES AS DETERGENTS

Disclosed is a water clarification composition comprising: (i) 0.1 to 50 % by weight of dry matter of anionic polymeric flocculant; (ii) 0.4 to 90 % by weight of dry matter of an amphoteric polymer having a molecular weight of at least 5,000 Da, said amphoteric polymer being characterized in that at least 30%, preferably at least 50% of the monomeric units of the amphoteric polymer are betaine units represented by the following formula (I): H2C=C(R1)-C(O)O-(CH2)n-N+(R2)(R3)-(CH2)p-X where: R1 represents a hydrogen atom or a linear or branched C1 to C6 alkyl group; R2 and R3, independently of each other, represent an alkyl, hydroxyalkyl or aminoalkyl group in which the alkyl group is a linear or branched C1 to C6 alkyl; n is an integer in the range of 1 to 4; p is an integer in the range of 2 to 8; - X represents COO-, SO3 - or OSO3 -; and (iii) 0 to 95 % by weight of dry matter of inert filler; wherein the combination of the anionic polymer flocculant, the amphoteric polymer and the inert filler constitutes at least 50 % by weight, preferably at least 70 % by weight of the water clarification composition, wherein the amphoteric polymer exists in a ratio to the anionic polymer flocculant, and wherein the ratio is selected from 3:1, 4:1, or 5:1. This composition is effective at removing turbidity in water, especially in the absence of metal flocculants and metal coagulants.