US4247340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of sugars using emulsion anion exchange resins
Assignee: Rohm and Haas Co
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Filing: 1978-09-19
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Granted: 1981-01-27
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Expires: 1998-09-19
Abstract
Abstract Impure sugar solutions containing charged particulate impurities are treated with strongly basic emulsion anion exchange resin particles to form flocs of the charged particulate impurities and the resin particles. These flocs remove dissolved ionic impurities because of their ion exchange functionality, and also remove color-imparting impurities.
Inventors
- 👤 Peter G. Cartier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:11
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/02; C08F220/10; C08J; C08J5/00; C08J5/20; Y; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/734; Y10S977/735; Y10S977/737; Y10S977/741; Y10S977/773; Y10S977/788; Y10S977/84; Y10S977/842; Y10S977/844; Y10S977/902
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A process for purifying impure sugar solutions, including simultaneous decolorization and clarification, comprising the steps of: (a) contacting the impure sugar solution with previously isolated, submicroscopic ion exchange resin particles in the form of approximately spherical beads of crosslinked copolymer having diameters within the range from about 0.01 to about 1.5 micrometers and bearing from about 0.7 to about 1.5 anion exchange functional groups per monomer unit, and (b) separating the ion exchange resin particles from the sugar solution.
Claim 2
Dependent Claim
79 words
A process for purifying impure sugar solutions, including simultaneous decolorization and clarification, comprising the steps of: (a) contacting the impure sugar solution with previously isolated, submicroscopic ion exchange resin particles in the form of approximately spherical beads of crosslinked copolymer having diameters within the range from about 0.01 to about 1.5 micrometers and bearing from about 0.7 to about 1.5 anion exchange functional groups per monomer unit, and (b) separating the ion exchange resin particles from the sugar solution.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the anion exchange functional groups are strongly basic anion exchange functional groups.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein the strongly basic anion exchange functional groups are in the chloride form.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the resin particles are dispersed as an emulsion in a liquid medium.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the ion exchange particles are separated in the form of a floc.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the floc is separated by filtration.
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein the floc is separated by flotation.
Claim 9
Dependent Claim
21 words
The process of claim 5 wherein the floc is formed with flocculating agents present as impurities in the impure sugar solution.
Claim 10
Dependent Claim
58 words
The process of claim 5 wherein insufficient flocculating agents are present as impurities in the impure sugar solution to incorporate all of the resin particles into the floc, and the process comprises the additional step, following step (a), of adding sufficient flocculating agent to the sugar solution to flocculate all of the resin particles which remain in emulsion.
Claim 11
Dependent Claim
14 words
The process of claim 9 wherein the flocculating agent is a nonionic surface-active agent.
Claim 12
Dependent Claim
15 words
The process of claim 9 wherein the flocculating agent is submicroscopic, cation exchange resin particles.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |