Method for preparing polyborate compounds and uses for same
OwnerKevin Kutcelinventor
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Abstract
The present invention relates to methods for producing suspensions and/or granular products of polyborates. Methods for making suspensions of both insoluble and soluble polyborates are also disclose. Additionally, uses for such polyborate suspensions and/or granular products are also disclosed.
Claims31
A method of forming a polyborate suspension comprising the steps of:
- (A) providing boric acid and at least one source of calcium, caustic sodium or mixtures thereof;
- and
- (B) forming a suspension of a polyborate compound, wherein the suspension of the polyborate has (1) a viscosity of at least about 300 cps or (2) the pH of the suspension of the polyborate is at least about 6 and the median particle size of the polyborate compound in suspension is less than about 100 μm.
A suspension of a polyborate compound comprising at least one sodium polyborate, calcium polyborate, sodium-calcium polyborates or mixtures thereof:
- wherein the suspension of the polyborate has (1) a viscosity of at least about 300 cps or (2) the pH of the suspension of the polyborate is at least about 7 and the median particle size of the polyborate compound in suspension is less than about 100 μm.
A method of forming a granular sodium polyborate compound comprising the steps of:
- (A) forming a sodium polyborate by combining boric acid with at least one caustic sodium source to yield a suspension containing a sodium polyborate compound;
- and
- (B) subjecting the suspension containing the sodium polyborate compound to atomization spray drying at a temperature in the range of about 50° C. to about 95° C. to yield a granular sodium polyborate compound, wherein at least about 50 percent of the particles of the granular sodium polyborate compound are spherical in shape or the granular sodium polyborate compound has a median particle diameter of at least about 50μm, wherein the solids content of the suspension is at least about 20 percent by weight.
A granular polyborate compound comprising a sodium polyborate wherein at least about 50 percent of the particles of the granular sodium polyborate are spherical in shape or have a median diameter of at least about 50 μm.
A method of forming a polyborate composition comprising the steps of:
- (A) providing boric acid with at least one calcium source and optionally at least one caustic sodium source;
- (B) forming a suspension of an insoluble polyborate selected from calcium polyborates or sodium-calcium polyborates;
- and
- (C) adding to the suspension of the insoluble polyborate compound from step (B) about 20 to about 80 weight percent of at least one wax, resin or binder in order to produce a polyborate composition,
- wherein the pH of the suspension of the insoluble polyborate is at least about 7 and the median particle size of the insoluble polyborate particles in suspension are less the about 100 μm.
Dependencies are inferred from the claim text.