US4294623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high purity maltose
Assignee: Meiji Seika Kaisha Ltd
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Filing: 1979-12-05
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Granted: 1981-10-13
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Expires: 1999-12-05
Abstract
Abstract The present invention is a method of producing maltose of high purity from starch, in which starch is saccharified by β-amylase and α-amylase and/or α-1, 6-glucosidase thereby making saccharified liquor containing less than 0.5% of glucose, 60˜85% of maltose, less than 5% of maltotriose together with by-products such as oligo-saccharide and dextrin. And then this liquor is passed through the columns filled with granular active carbons, which have a peak of micropore diameter distribution of above and below 25 A respectively, under the condition of Special velocity (SV) below 2 thereby removing dextrin and oligosaccharide and thus producing maltose of high purity.
Inventors
- 👤 Hidemasa Hidaka
- 👤 Toshiaki Kohno
- 👤 Toshiaki Eida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/22; C13; C13K; C13K7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
Method of producing high purity maltose having more than 97% of maltose content from a saccharified liquor containing less than 0.5% of glucose, 60˜85% of maltose and less than 5% of maltotriose, the remainder oligosaccharide and/or dextrin, comprising passing said saccharified liquor through a column filled with granular activated carbon having a peak micropore diameter above 25 A, thereby removing mainly dextrin, and then passing the liquor through a column filled with granular activated carbon having a main peak of micropore diameter distribution below 25 A, thereby removing mainly oligosaccharide, and eluting without using any organic solvent.
Claim 2
Dependent Claim
97 words
Method of producing high purity maltose having more than 97% of maltose content from a saccharified liquor containing less than 0.5% of glucose, 60˜85% of maltose and less than 5% of maltotriose, the remainder oligosaccharide and/or dextrin, comprising passing said saccharified liquor through a column filled with granular activated carbon having a peak micropore diameter above 25 A, thereby removing mainly dextrin, and then passing the liquor through a column filled with granular activated carbon having a main peak of micropore diameter distribution below 25 A, thereby removing mainly oligosaccharide, and eluting without using any organic solvent.
Claim 3
Dependent Claim
23 words
Method as claimed in claim 1, wherein the saccharified liquor is passed through said granular activated carbon column at 50°˜70° C., SV 0.5˜1.0.
Claim 4
Dependent Claim
23 words
Method as claimed in claim 1, wherein a load is used to 0.3˜5 times by dry weight as much as granular activated carbon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |