Biomass-derived grinding aids

Patent metadata

Field	Value
Publication number	US-8979998-B2
Application number	US-201414482600-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Jun 2, 2005
Publication date	Mar 17, 2015
Grant date	Mar 17, 2015

Abstract

Compositions and methods for increasing grinding efficiency of cement, cement clinker, raw materials for cement, and other inorganic particles. Use of biomass-derived polyols such as diols, triols, or mixtures thereof, optionally with a conventional grinding aid, cement quality improver, and/or hexavalent chromium reducer, are believed to provide less risk of sludging when compared to glycerides obtained from fossil fuel sources.

First claim

We claim:

1. A method for increasing efficiency of grinding cement clinker particles or limestone particles, comprising:
introducing to cement clinker particles, limestone particles, or mixture thereof, in a rotating ball mill or rotating roller mill whereby said particles are ground to have finer average particle size, an aqueous additive composition comprising:
at least one grinding additive selected from the group consisting of triethanolamine, triisopropanolamine, diethanolisopropanolamine, tetrahyroxyethylthylene diamine, an acetic acid or salt thereof, or mixtures thereof; and
a crude glycerin obtained derived from biofuel production comprising glycerin, methanol, water moisture, fatty acid, sodium chloride, sulfate, phosphate, and ash, said ash being present in an amount not exceeding 10% by weight of the aqueous additive composition;
wherein the amount of said at least one grinding additive and said crude glycerin derived from biofuel production being in the ratio of 90:10 to 10:90 by weight.

2. The method of claim 1 wherein said aqueous additive composition comprising at least one grinding additive and said crude glycerin derived from biofuel production are introduced together as a single additive composition, the additive composition comprising water in the amount of 10%-30% and triethanolamine in an amount of 10%-80%, and said crude glycerin derived from biofuel production comprising 1,2,3-propane triol.

3. The method of claim 2 wherein said aqueous additive composition comprising at least one grinding additive and said crude glycerin derived from biofuel production are introduced together as an additive composition, the additive composition comprising water in the amount of 10%-30% and triisopropanolamine in an amount of 10%-80%, and biofuel derived 1,2,3-propane triol.

4. The method of claim 3 wherein the 1,2,3-propanetriol within said byproduct is reacted with a monobasic carboxylic acid.

5. The method of claim 3 wherein the 1,2,3-propanetriol within said byproduct has one or more substituted OH groups.

6. A particulate composition made by the method of claim 1 .

7. A composition for increasing efficiency of grinding particles, comprising:
at least one grinding additive selected from the group consisting of triethanolamine, triisopropanolamine, diethanolisopropanolamine, tetrahyroxyethylthylene diamine, an acetic acid or salt thereof, or mixtures thereof; and
a crude glycerin obtained derived from biofuel production comprising glycerin, methanol, water moisture, fatty acid, sodium chloride, sulfate, phosphate, and ash, said ash being present in an amount not exceeding 10% by weight of the aqueous additive composition; and
the amount of said at least one grinding additive and said crude glycerin obtained derived from biofuel production being in the ratio of 90:10 to 10:90 by weight.

Assignees

• Jardine Leslie A
• Porteneuve Charlotte
• Blond Gerard
• Grace W R & Co

Inventors

• Jardine Leslie A
• Porteneuve Charlotte
• Blond Gerard

Classifications

• C04B24/02

  Alcohols; Phenols; Ethers · CPC title

• C04B16/00 Primary

  Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title

• C04B40/00 Primary

  Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability (active ingredients C04B22/00 - C04B24/00; hardening of a well-defined composition C04B26/00 - C04B28/00; making porous, cellular or lightening C04B38/00; mechanical aspects B28, e.g. conditioning the materials prior to shaping B28B17/02) · CPC title

• C04B7/52

  Grinding {; After-treatment of ground cement} · CPC title