Extrusion method for producing FD&C dyes
OwnerJohn R. Muddinventor
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Abstract
A solution of substantially pure, chemically synthesized food dye is converted to a dustless and abrasion-resistant granular composition of high physical integrity which dissolves readily when intended for use. The conversion is accomplished by subjecting the dye to sequential processing operations including spray drying, mixture with water and extrusion under controlled rate and pressure. Optional, albeit preferred additional procedures include drying the product under controlled temperature following extrusion and vibration sifting the product following drying to obtain granules of approximate uniform size prefatory to packaging.
Claims21
A method for producing granular FD&C dyes comprising the steps of:
- drying a solution of FD&C dye to produce a powder;
- combining said powder with water in a relative weight percentage amount sufficient to form an extrudable mixture;
- extruding said mixture to produce a stranded dye product;
- and
- sifting said stranded dye product to produce a granular dye product.
A method for producing FD&C dyes in strands comprising:
- introducing an FD&C dye mixture into an extruder having a housing with an inlet and an outlet;
- extruding said dye mixture through said housing and out of said extruder through a perforated die having a plurality of passageways, each of the passageways having an entry bore and an exit bore in communication therewith, the die being supported within said housing and each of said entry bores having a first diameter and each of said exit bores having a second diameter such that the ratio of the second diameter to the first diameter is about 1.2;
- and
- recovering an extruded product from said extruder.
A method for producing granular FD&C dyes in strands comprising:
- introducing an FD&C dye mixture into an extruder having a housing with an inlet and an outlet;
- extruding said dye mixture through said housing and out of said extruder through a perforated die having a plurality of passageways, each of the passageways having an entry bore and an exit bore in communication therewith, the die being supported within said housing and each of said entry bores having a first diameter and each of said exit bores having a second diameter such that the ratio of the second diameter to the first diameter is about 1.2;
- recovering an extruded product from said extruder;
- and
- drying said product.
Dependencies are inferred from the claim text.