US4024334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorbent materials
Assignee: Commonwealth Scientific and Industrial Research Organisation
•
Filing: 1975-02-20
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Granted: 1977-05-17
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Expires: 1995-02-20
Abstract
Abstract Cellulose esters, such as cellulose acetate and/or cellulose acetate butyrate, prepared in the form of gel beads are active as adsorbents, especially for debittering of fruit juices by removal of limonin.
Inventors
- 👤 Bruce Veness Chandler
- 👤 Robert Leonard Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; A; A23; A23L; A23L2/00; A23L2/70; A23L2/80; B; B01; B01J; B01J20/00; B01J20/22; C08J2301/00; C08J2301/08; C08J2301/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
An adsorbent material effective for the adsorption of limonoid principles from citrus fruit juices comprising discrete gel beads of a size within the range of 1.7 to 6.4 mm. diameter, such beads consisting essentially of at least one cellulose ester material selected from the group consisting of cellulose acetate and cellulose acetate butyrate and sufficient water to form a gel.
Claim 2
Dependent Claim
60 words
An adsorbent material effective for the adsorption of limonoid principles from citrus fruit juices comprising discrete gel beads of a size within the range of 1.7 to 6.4 mm. diameter, such beads consisting essentially of at least one cellulose ester material selected from the group consisting of cellulose acetate and cellulose acetate butyrate and sufficient water to form a gel.
Claim 3
Dependent Claim
24 words
An adsorbent material as claimed in claim 1, in which the ester-to-water ratio is within the range of from 1:4.8 to 1:5.6 by weight.
Claim 4
Dependent Claim
182 words
A method of preparing an adsorbent material effective for the adsorption of limonoid principles from citrus fruit juices as claimed in claim 1, which comprises the steps of dissolving cellulose ester material selected from the group consisting of cellulose acetate and cellulose acetate butyrate in a hot solvent selected from the group consisting of (1) a mixture of a solvent for the ester miscible with water and water; and (2) a solvent for the ester miscible with water, adding the resulting hot solution of cellulose ester material to a heated liquid with which the said solution is immiscible whereby to cause substantially all of said cellulose ester solution to form a dispersion in said heated liquid, agitating the mixture to form globules of the cellulose ester solution dispersed in said heated liquid, cooling the dispersion to set the globules, washing the said globules to remove solvent therefrom and thereby form beads, each consisting of cellulose ester and sufficient water to form a gel, and recovering the fraction of gel beads thus formed having a particle size between 1.7 mm and 6.4 mm.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 3, wherein the solvent for the ester is ethanol and where the cellulose ester is cellulose acetate butyrate.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 3, wherein the solvent for the ester is a mixture of water with dimethyl formamide, acetone or acetic acid and where the cellulose ester is cellulose acetate.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 3, wherein the said immiscible liquid is petroleum oil or paraffin oil.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 3, wherein a surfactant material is added to the immiscible liquid.
Claim 9
Dependent Claim
161 words
A method of preparing an adsorbent material effective for the adsorption of limonoid principles from citrus fruit juices as claimed in claim 1, which comprises the steps of dissolving cellulose ester material selected from the group consisting of cellulose acetate and cellulose acetate butyrate in a hot solvent selected from the group consisting of (1) a mixture of a solvent for the ester miscible with water and water; and (2) a solvent for the ester miscible with water, adding the resulting hot solution of cellulose ester material dropwise to a liquid with which the said solution is immiscible to form globules of the cellulose ester solution dispersed in said liquid, recovering the said globules from the said liquid, washing the said globules to remove solvent therefrom and thereby form beads, each consisting of cellulose ester and sufficient water to form a gel, and recovering the fraction of gel beads thus formed having a particle size between 1.7 mm. and 6.4 mm.
Claim 10
Dependent Claim
18 words
A method as claimed in claim 8, wherein the said immiscible liquid is petroleum oil or paraffin oil.
Claim 11
Dependent Claim
17 words
A method as claimed in claim 8, wherein a surfactant material is added to the immiscible liquid.
Claim 12
Dependent Claim
23 words
A method according to claim 8 wherein the solvent for the ester is ethanol and where the cellulose ester is cellulose acetate butyrate.
Claim 13
Dependent Claim
32 words
A method according to claim 8 wherein the solvent for the ester is a mixture of water with dimethyl formamide, acetone or acetic acid and where the cellulose ester is cellulose acetate.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |