US4735193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of a monosaccharide with mixed matrix membranes
Assignee: Honeywell UOP LLC
•
Filing: 1985-02-08
•
Granted: 1988-04-05
•
Expires: 2005-02-08
Abstract
Abstract A process for separating a monosaccharide from an aqueous solution comprising monosaccharides and a second component comprising a polysaccharide. The mixture is contacted with a mixed matrix membrane comprising a adsorbent or molecular sieve material dispersed in an organic polymer in which the monosaccharide has a greater steady state permeability than the polysaccharide. The monosaccharide passes through the membrane, and is recovered. Particular mixed matrix membranes found to be useful in separating mono from polysaccharides are silicalite, gamma-alumina, activated carbon or a calcium exchanged Y-zeolite dispersed in cellulose acetate or polyelectrolyte complex polymers.
Inventors
- 👤 Santi Kulprathipanja
- 👤 Edward W. Funk
- 👤 Sudhir S. Kulkarni
- 👤 Y. Alice Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:46
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/12; B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; B01D69/00; B01D69/14; B01D69/141; B01D69/1411; B01D69/14111; C13B20/16; C13B20/165; C13K; C13K1/00; C13K1/02; C13K1/04; C13K13/00; C13K5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A process for separating a monosaccharide from an aqueous solution comprising said monosaccharide and a second component comprising a polysaccharide by contacting at separation conditions said aqueous solution with a mixed matrix membrane comprising a particulate material dispersed in an organic polymer in which membrane said monosaccharide has a greater steady state permeability than said polysaccharide, and recovering the monosaccharide which passes through said membrane, said particulate material selected from the group consisting of crystalline aluminosilicates, crystalline silica, an gamma-alumina, activated carbon and ion exchange resins.
Claim 2
Dependent Claim
86 words
A process for separating a monosaccharide from an aqueous solution comprising said monosaccharide and a second component comprising a polysaccharide by contacting at separation conditions said aqueous solution with a mixed matrix membrane comprising a particulate material dispersed in an organic polymer in which membrane said monosaccharide has a greater steady state permeability than said polysaccharide, and recovering the monosaccharide which passes through said membrane, said particulate material selected from the group consisting of crystalline aluminosilicates, crystalline silica, an gamma-alumina, activated carbon and ion exchange resins.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said material is a crystalline aluminosilicate.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein said material is calcium cation exchanged Y-type zeolite crystalline aluminosilicate.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein said material is crystalline silica.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said material is activated carbon.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said material is an ion exchange resin.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said organic polymer comprises cellulose acetate.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said organic polymer comprises a polyelectrolyte complex.
Claim 10
Dependent Claim
17 words
The process of claim 8 wherein said polyelectrolyte complex comprises poly(sodium styrene sulfonate) and poly(vinylbenzyl trimethylammonium chloride).
Claim 11
Dependent Claim
11 words
The process of claim 9 wherein said material is gamma-alumina particles.
References Cited (Backward Citations)
US2985589A
Cited
US2924630A
Cited
US3133137A
Cited
US3133132A
Cited
US3246767A
Cited
US3457170A
Cited
US3556305A
Cited
US3817232A
Cited
US4032454A
Cited
US3862030A
Cited
US3878104A
Cited
US3993566A
Cited
US4014711A
Cited
US4061724A
Cited
US4116889A
Cited
US4340428A
Cited
US4220535A
Cited
US4344775A
Cited
US4305782A
Cited
US4302334A
Cited
US4243701A
Cited
US4421567A
Cited
US4341605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |