Dust free particulate enzyme formulation
US4689297A · kind A · utility
123Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Mar 5, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N9/98
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Dust free enzyme containing particles are produced by coating hydratable core particles with an enzyme and then with a film-forming macro-molecular material. Coating is carried out by suspending the core particles in a fluidized bed dryer, spraying an aqueous slurry of enzyme onto the core particles while suspended, and evaporating water to leave a dried enzyme coat on the particles. The resultant enzyme-coated particles, while still suspended in the fluidized bed, are sprayed with a solution or dispersion of the macro-molecular material, and dried to remove solvent to leave a coating of the macro-molecular material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.