Claims
- 1. A process for producing starch sugar which comprises contacting liquefied starch with amylase immobilized on porous beads of chitosan produced by deacetylating natural polymer chitin and crosslinking with a crosslinking agent to impact acid resistance, and further introducing an aliphatic or aromatic functional group as a spacer.
- 2. The process as claimed in claim 1 wherein the amylase is glucoamylase, .beta.-amylase or maltooligosaccharide-forming amylase.
- 3. The process of claim 1 wherein the beads of chitosan have a diameter of 0.1 to 3 mm, a pore diameter of not more than 3 .mu.m and a specific surface area of 15 to 230 m.sup.2 / g.
- 4. The process of claim 3 wherein the crosslinking is with dicarboxylic acid, dialdehyde or diisocyanate.
- 5. A process for producing starch sugar which comprises contacting liquefied starch with a combination of amylase and a debranching enzyme, both immobilized on porous beads of chitosan produced by deacytalating natural polymer chitin and crosslinking with a crosslinking agent to impart acid resistance, and further introducing an aliphatic or aromatic functional group as a spacer.
- 6. The process as claimed in claim 5 wherein the amylase is glucoamylase, .beta.-amylase or maltooligosaccharide-forming amylase.
Priority Claims (3)
Number |
Date |
Country |
Kind |
61-200046 |
Aug 1986 |
JPX |
|
61-219430 |
Sep 1986 |
JPX |
|
61-242730 |
Oct 1986 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/086,527, filed Aug. 17, 1987.
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Number |
Name |
Date |
Kind |
4011137 |
Thompson et al. |
Mar 1977 |
|
4102745 |
Thompson et al. |
Jul 1978 |
|
4167447 |
Masri et al. |
Sep 1979 |
|
4338398 |
Yoneyama |
Jul 1982 |
|
4511654 |
Rohrbach et al. |
Apr 1985 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
86527 |
Aug 1987 |
|