Process of preparing a water dispersible hydrophobic or aerophilic solid
AssigneeDanochemo A/S
InventorsNina M. Jensen, Per Vilstrup, Marianne Winning
Life of this patent
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Abstract
A process for producing hydrophobic or aerophobic solids having a particle size not exceeding 10 .mu.m, which solids can be dispersed in water in the form of discrete microparticles. In the process the solids are milled in an aqueous medium in the presence of a hydrocolloid to obtain a suspension containing suspended particles having an average particle size not exceeding 10 .mu.m. The suspension is then finely divided and dried to form a powder.
Claims18
A process of preparing a hydrophobic solid powder which is a carotenoid or a natural colorant and which can be dispersed in water in the form of discrete microparticles, comprising the steps of:
- a) providing a hydrophobic solid,
- b) adding the solid to an aqueous solution of a hydrocolloid comprising not less than about 10 percent by weight of said solid to obtain a mixture, which hydrocolloid is gelatine, gum arabic, soy bean protein or modified starch or mixtures thereof,
- c) stirring the mixture at a temperature between 0.degree. C. and 100.degree. C. to form a first aqueous suspension,
- d) transferring the first aqueous suspension to a mill having cooling equipment for maintaining the temperature below the decomposition temperature of said solid,
- e) wet grinding said solid which is present in said aqueous suspension in said mill at a temperature between 0.degree. C. and 100.degree. C. to obtain a second aqueous suspension wherein the maximum particle size of the solid is 10 .mu.m, and
- f) finely dividing and drying said second aqueous suspension to obtain a powder.
A process of preparing an aerophilic solid powder which is a carotenoid or a natural colorant and which can be dispersed in water in the form of discrete microparticles, comprising the steps of:
- a) providing an aerophilic solid,
- b) adding the solid to an aqueous solution of a hydrocolloid comprising not less than about 10 percent by weight of said solid to obtain a mixture, which hydrocolloid is gelatine, gum arabic, soy bean protein or modified starch or mixtures thereof,
- c) stirring the mixture at a temperature between 0.degree. C. and 100.degree. C. to form a first aqueous suspension,
- d) transferring the first aqueous suspension to a mill having cooling equipment for maintaining the temperature below the decomposition temperature of said solid,
- e) wet grinding said solid which is present in said aqueous suspension in said mill at a temperature between 0.degree. C. and 100.degree. C. to obtain a second aqueous suspension wherein the maximum particle size of the solid is 10 .mu.m, and
- f) finely dividing and drying said second aqueous suspension to obtain a powder.
Dependencies are inferred from the claim text.