Grinding aids for hydraulic cements

Details Grinding aids for hydraulic cements Grinding aids for hydraulic cements

C - Chemistry, Metallurgy

04

B

261/50, 260/608.

C04B 7/02 (2006.01) B02C 23/06 (2006.01) C04B 24/00 (2006.01) C04B 24/12 (2006.01)

Patent

CA 1224495

ABSTRACT OF THE DISCLOSURE Hydraulic cements such as Portland cement are interground with amine salts of aromatic group-containing carboxylic acids (e.g. triethanolamine benzoate) to enhance the efficiency of the grinding operation. In a preferred embodiment, a mixture of aromatic group-containing carboxylic acids obtained as a low cost by-product in a commercial process to produce phthalic anhydride, is utilized to prepare the amine salt grinding aid of the invention. The grinding aids of the invention also appear to inhibit the "pack-set" tendencies of the resulting ground cement particles.

401799

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