C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
C10L 1/32 (2006.01) H04N 7/08 (2006.01)
Patent
CA 2054502
ABSTRACT OF THE DISCLOSURE An additive composition for use in a highly concentrated coal-water slurry, having as essential components thereof (a) a water-soluble copolymer obtained by using as essential components (I) at least one vinyl monomers represented by the general formula I: Image (I) wherein A1 and A2 are independently H, methyl, or -COOX, providing that A1 and A2 are not simultaneously -COOX, A3 is H, methyl -COOX, or -CH2COOX, providing that A1 and A2 are independently H,or methyl when A3 is -COOX or -CH2COOX, R1 is -CO- or -CH2CO-, R2 is alkylene of 2 to 4 carbon atoms, n is a number in the range of 1 to 100 on the average, R3 is a monovalent organic group selected the class consisting of alkyl, alkenyl, aryl, aralkyl, cycloalkyl, cycloalkenyl, and heterocyclic compounds, and X is H, alkali metal, alkaline earth metal, ammonium, or alkylamines, and (II) at least one unsaturated carboxylic acid monomers represented by the general formula II: Image (II) wherein B1 and B2 are independently H, methyl, or -COOY, providing that B1 and B2 are not simultaneously -COOY, B3 is H, methyl, -COOY, or -CH2COOY, providing that B1 and B2 are independently H or methyl when B3 is -COOY or -CH2COOY, -34- and M and Y are independently H, alkali metal, alkaline earth metal, ammonium, or alkylamine, in a weight ratio of vinyl monomer (I)/unsaturated carboxylic acid monomer (II) in the range of 0.5/99.5 to 15/85, in a total amount of said vinyl monomer (I) and said unsaturated carboxylic acid monomer (II) accounting for a proportion of not less than 60% by weight of the total of all the monomers used in the water soluble copolymer and (b) an electrolytic compound of which the anion moiety has a chemical formula weight of not more than 500 and the anion moiety has a chemical formula weight of not more than 100 per electric charge. -35-
Goto Takakiyo
Hayashi Ken-Ichiro
Shuhei Tatsumi
Takao Shoichi
Kawasaki Jukogyo Kabushiki Kaisha
Nippon Shokubai Co. Ltd.
Sim & Mcburney
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