US4645833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of borate-containing, dispersible, water-soluble polygalactomannans
Assignee: Diamalt AG
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Filing: 1982-09-21
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Granted: 1987-02-24
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Expires: 2002-09-21
Abstract
Abstract Method for preparation of dispersible, water-soluble polygalactomannans and polygalactomannan derivatives by crosslinking with borate ions, in which the polygalactomannan-containing endosperm of legumes is allowed to soak in an aqueous alkaline solution of a material containing borate ions in which the concentration of the borate ions, expressed as borax, is between 0.001 and 0.09 wt % and the hydroxyl ion concentration, expressed as NaOH, is between 0.2 and 10 wt % of the polygalactomannan and after taking up the solution, the cell structure of the splits is mechanically destroyed using high shear forces in a flaking, crushing or extruder process and then the product of the process is dried and ground in known fashion.
Inventors
- 👤 Friedrich Bayerlein
- 👤 Peter-Paul Habereder
- 👤 Nikolaos Keramaris
- 👤 Nikolaus Kottmair
- 👤 Manfred Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:49
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087; C08B37/0096
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A process for the preparation of borate-containing, dispersible, water-soluble, polygalactomannan which comprises: obtaining polygalactomannan material from endosperm of legumes; soaking said polygalactomannan material in an aqueous alkaline solution containing 0.001 to 0.09 weight percent of borate ions, expressed as borax (Na 2 B 4 O 7 .10H 2 O), based upon the polygalactomannan, and 0.2 to 10 percent weight of hydroxyl ions, expressed as sodium hydroxide, based upon the polygalactomannan to thereby obtain a soaked material; and then subjecting said soaked material to mechanical treatment resulting in destruction of the cell structure of said polygalactomannan material.
Claim 2
Dependent Claim
96 words
A process for the preparation of borate-containing, dispersible, water-soluble, polygalactomannan which comprises: obtaining polygalactomannan material from endosperm of legumes; soaking said polygalactomannan material in an aqueous alkaline solution containing 0.001 to 0.09 weight percent of borate ions, expressed as borax (Na 2 B 4 O 7 .10H 2 O), based upon the polygalactomannan, and 0.2 to 10 percent weight of hydroxyl ions, expressed as sodium hydroxide, based upon the polygalactomannan to thereby obtain a soaked material; and then subjecting said soaked material to mechanical treatment resulting in destruction of the cell structure of said polygalactomannan material.
Claim 3
Dependent Claim
14 words
The process of claim 1 which comprises employing borax to supply the borate ions.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein said polygalactomannan-containing endosperm is from a material selected from the group of Cassia occidentalis, Cyamopsis tetragonoloba, Sesbania egyptiaca, Sesbania cannabia, Sesbania aculeata, or Ceratonia siliqua.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein the amount of solution employed is 40% to 130% by weight based upon the equivalent weight of galactomannan present.
Claim 6
Dependent Claim
34 words
The process of claim 1 wherein said solution contains 0.003 to 0.08 weight percent of borate ions expressed as borax (Na 2 B 4 O 7 .10H 2 O) based upon the polygalactomannan material.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said mechanical treatment comprises employing high shear forces by flaking, crushing, or extrusion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |