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Method for production of an enzyme granulate
| Details |
Inventors: Markussen, Erik K.;
Assignee: Novo Industri A/S (Bagsvaerd, DK)
Primary Examiner: Rosenberg; Peter D.
Assistant Examiner:
Attorney, Agent or Firm: Fidelman; Morris, Wolffe; Franklin D.
An enzyme granulation process wherein an enzyme solution or suspension, filler, binder and cellulose or artificial fibres are granulated with fines and oversize particles of the granulate product particle the process being characterized by recirculation of fines without grinding, by grinding oversize particles then recirculation thereof, with the recirculated particles as a whole exhibiting a cumulative size distribution of the same general shape as the cumulative size distribution of the granulate product particles. |
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DETAILED DESCRIPTION I claim: 1.
In a process for production of an enzyme granulate which comprises granulating an enzyme composition comprising enzyme, filler, binder, and from 1.
5-40% by weight thereof of cellulose or artificial fibers, the enzyme added to the granulating process being in solution or suspension, and wherein the granulate product particles are separated into a middle fraction containing particles of the desired size interval, a small size fraction containing particles smaller than the desired size interval, and a large size fraction containing particles larger than the desired size interval with said small size and large size fractions being recirculated to the granulating process, the improvement which comprises: recirculating the particles of said small size fraction without grinding of same, and grinding the particles of said large size fraction then recirculating same, the particles of said large size fraction being ground so that the recirculated particles as a whole exhibit a cumulative particle size distribution curve of the same general shape as the cumulative particle size distribution curve of the aforesaid granulate product particles.
2.
The process of claim 1 wherein the large size and small size particles recirculated comprise from 10-90% by weight of the aforesaid granulate product particles.
3.
The process of claim 1 further comprising a desired particle size interval of about 300-900 .
mu.
m.
4.
The process of claim 1 wherein granulation is performed at a temperature between 20.
degree.
and 70.
degree.
C.
5.
The process of claim 1 wherein the enzyme is a protease, an amylase, a cellulase, a lipase or an oxidase.
6.
The process of claim 1 wherein the granulate product particles are dried prior to separation into said fractions.
7.
The process of claim 1 wherein the fiber content comprises 4-20% by weight.
8.
The process of claim 1 wherein the enzyme composition contains a waxy substance granulating agent.
Description:
This invention relates to a method for production of an enzyme granulate
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