Powdered overbased amorphous alkaline earth metal salts and processes for making
AssigneeOMG Americas, Inc.
InventorsChester E. Ramey, James E. Reddy
Life of this patent
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Abstract
Powdered overbased amorphous alkaline earth salts are made which consist essentially of isolated solid agglomerated micelles of amorphous alkaline earth metal salts complexed with an amorphous alkaline earth metal carboxylate of a fatty acid. The process for making the powder involves precipitating and isolating the solid particles from liquid overbased alkaline earth metal compositions.
Claims46
A powdered overbased amorphous alkaline earth metal salt of a fatty acid consisting essentially of
- isolated solid agglomerated micelles of a complexed salt of an amorphous alkaline earth metal salt from the group consisting of carbonate, sulfate, sulfide and sulfite, complexed with an amorphous alkaline earth metal carboxylate of a fatty acid.
A powdered overbased amorphous calcium salt of a fatty acid consisting essentially of
- isolated solid agglomerated micelles of a complexed salt of an amorphous calcium carbonate complexed with amorphous calcium carboxylate of a fatty acid.
A process for preparing a powdered overbased amorphous alkaline earth metal salt of a fatty acid comprising
- reacting an alkaline earth metal base and a fatty acid with an equivalent ratio of metal base to fatty acid being greater than 1:1 in the presence of liquid hydrocarbon,
- acidifying the mixture to produce an amorphous alkaline earth metal salt from the group consisting of carbonate, sulfate, sulfide and sulfite complexed with an amorphous alkaline earth metal carboxylate of the fatty acid in said liquid hydrocarbon,
- precipitating from said liquid hydrocarbon solid particles of an amorphous alkaline earth metal salt from the group consisting of carbonate, sulfate, sulfide and sulfite complexed with an amorphous alkaline earth metal carboxylate of a fatty acid, and
- isolating said solid particles in the form of powdered overbased amorphous alkaline earth metal salt.
The process for preparing a powdered overbased amorphous calcium oleate/carbonate comprising
- reacting calcium hydroxide base and oleic acid with an equivalent ratio of the base to the acid being greater than 1:1 in the presence of a mixture of liquid hydrocarbon and catalyst,
- carbonating the mixture to produce amorphous calcium carbonate,
- adding during carbonation a dispersion of calcium hydroxide, liquid hydrocarbon and cosurfactant aliphatic alcohol having at least 8 carbon atoms in relative amounts at a controlled rate of calcium hydroxide addition to produce a liquid reaction product,
- removing water from the reaction product to provide an overbased amorphous calcium oleate/carbonate in said liquid hydrocarbon,
- precipitating from said liquid hydrocarbon solid particles of an amorphous calcium carbonate complexed with an amorphous alkaline earth metal carboxylate of a fatty acid, and
- isolating said solid particles in the form of powdered overbased amorphous alkaline earth metal salt.
Dependencies are inferred from the claim text.