US4670167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopolymer formulations and processes for preparing them
Assignee: Shell USA Inc
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Filing: 1984-09-10
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Granted: 1987-06-02
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Expires: 2004-09-10
Abstract
Abstract Biopolymer formulation, in particular a polysaccharide-containing water in oil emulsion, process for preparing such emulsions and process for concentrating these emulsions. Aqueous systems thickened by the incorporation of biopolymer emulsions.
Inventors
- 👤 Jan J. Bleeker
- 👤 Jan H. Lammers
- 👤 Jacob B. Roest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C08; C08L; C08L5/00; C09K3/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936; Y10S507/937
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
36 words
Biopolymer water in oil emulsion comprising 1-70% wt biopolysaccharide 20-60% wt hydrophobic liquid 1-60% wt water and 1-20% wt emulsifier selected from the group consisting of poly(isobutylene-maleic anhydride)-triethylene tetraamine reaction product, bis(2-hydroxyethyl-tallowamine, tallowamine or combinations thereof.
Claim 2
Dependent Claim
36 words
Biopolymer water in oil emulsion comprising 1-70% wt biopolysaccharide 20-60% wt hydrophobic liquid 1-60% wt water and 1-20% wt emulsifier selected from the group consisting of poly(isobutylene-maleic anhydride)-triethylene tetraamine reaction product, bis(2-hydroxyethyl-tallowamine, tallowamine or combinations thereof.
Claim 3
Dependent Claim
22 words
Biopolymer emulsion as claimed in claims 1 in which the emulsifier is a mixture of poly(isobutylene-maleic anhydride)-triethylene tetraamine reaction product and bis(2-hydroxyethyl)tallowamine.
Claim 4
Dependent Claim
31 words
Biopolymer emulsion as claimed in claim 1 in which the polysaccharide is derived from Xanthomonas campestris NCIB 11808, Xanthomonas campestris NCIB 11854, Pseudomonoas sp. NCIB 11624 and Pseudomonas sp. NCIB 11592.
Claim 5
Dependent Claim
35 words
Biopolymer emulsion as claimed in claim 1 in which the polysaccharide is derived from a clarified and optionally concentrated fermentation broth being an aqueous solution, substantially free from cellular debris which contains 3-25% wt polysaccharide.
Claim 6
Dependent Claim
26 words
Biopolymer emulsion as claimed in claim 1, 2, 3 or 4 in which the hydrophobic liquid is a white spirit or a mixture of white spirits.
Claim 7
Dependent Claim
54 words
Biopolymer emulsion as claimed in claim 1 in which the emulsion comprises 30-60% wt polysaccharide derived from Xanthomonas campestris NCIB 11808, Xanthomonas campestris NCIB 11854, Pseudomonas sp. NCIB 11624 and/or Pseudomonas sp. NCIB 11592, 25-45% wt of white spirit, 1-15% water and 5-10% of a mixture of poly(isobutylene-maleic anhydride)-triethylene tetraamine reaction product and bis(2-hydroxyethyl)tallowamine.
Claim 8
Dependent Claim
40 words
Biopolymer emulsion which is obtained after a biopolymer emulsion as claimed in claim 1 or 6 has been subjected to a shear treatment or to milling in a colloid mill whereby the size of the polysaccharide droplets is substantially reduced.
Claim 9
Dependent Claim
19 words
An aqueous system whenever thickened by the incorporation of a biopolymer emulsion as claimed in claim 1 or 6.
Claim 10
Dependent Claim
20 words
A thickened aqueous system as claimed in claim 8 which is a flooding material used in enhanced oil recovery operations.
Claim 11
Dependent Claim
31 words
A process for concentrating a biopolymer emulsion as claimed in claim 1 or 6 in which water from the emulsion is removed by evaporation under reduced pressured and at elevated temperature.
Claim 12
Dependent Claim
30 words
A process as claimed in claim 10 in which water removal is continued until the concentration of the biopolymers is in the emulsion is in the range of 35-45% wt.
Claim 13
Dependent Claim
23 words
A process as claimed in claim 11 in which the evaporation is carried out in a rota vapor or a wiped film evaporator.
Claim 14
Dependent Claim
30 words
A process as claimed in claim 10 in which the reduced pressure is in the range of 1-50 mm Hg and the temperature is in the range of 40°-120° C.
Claim 15
Dependent Claim
24 words
A process as claimed in claim 10 in which the biopolymer emulsion is subjected to a shear treatment or processed through a colloid mill.
References Cited (Backward Citations)
US3734873A
Cited
US3979349A
Cited
US4052353A
Cited
US4052353B1
Cited
GB1482515A
Cited
US4325861A
Cited
GB2018300A
Cited
US4312675A
Cited
US4393151A
Cited
US4374216A
Cited
US4571422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |