Patent DE937680C successfully refreshed from Google Patents.
EP0137538A2
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Biopolymer formulations and processes for preparing them
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1984-09-04
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Granted: —
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Expires: 2004-09-04
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 incorporationof biopolymer emulsions.
Inventors
- 👤 Jan Jacob Bleeker
- 👤 Jan Hendrik Lammers
- 👤 Jacob Bernard Roest
- 👤 Rudolf Josef Albrecht Eckert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:06
CPC Classifications
C; C12; C12P; C12P19/00; 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: 25
Claim 1
Independent Claim
29 words
Biopolymer water-in-oil emulsion comprising 1 - 70%wt polysaccharide in the form of water-swollen particles 10 - 60% wt hydrophobic liquid 5 - 60%wt water and 1 - 25%wt emulsifier
Claim 2
Dependent Claim
29 words
Biopolymer water-in-oil emulsion comprising 1 - 70%wt polysaccharide in the form of water-swollen particles 10 - 60% wt hydrophobic liquid 5 - 60%wt water and 1 - 25%wt emulsifier
Claim 3
Dependent Claim
22 words
Biopolymer water-in-oil emulsion as claimed in claim 1 which comprises 30-65%wt polysaccharide 15-40%wt hydrophobic liquid 5-25%wt water 5-25%wt emulsifier and 1-15%wt stabiliser
Claim 4
Dependent Claim
36 words
Biopolymer emulsion as claimed in claim 1 or 2, in which the emulsifier is selected from the group consisting of sorbitan-mono-oleate, sorbitan mono-laurate, ethoxylated alkylphenol, sorbitan mono-palmitate, sobitan mono-stearate, polyisobutylene-maleic-anhydride-triethylene tetraamine, bis(2-hydroxyethyl)tallowamine, tallowamine or combinations thereof.
Claim 5
Dependent Claim
34 words
Biopolymer emulsion as claimed in claims 1 or 2 in which the emulsifier is a mixture of sorbitan mono-oleate and sorbitan mono-laurate and an ethoxylated alkylphenol and/or a mixture of poly-isobutylene-maleic-anhydride-triethylenetetraamine and bis (2-hydroxyethyl)tallowamine.
Claim 6
Dependent Claim
39 words
Biopolymer emulsion as claimed in any one of the claims 2-4 in which the stabiliser is selected from the group consisting of polyalkylmethacrylates, polyalkylacrylates, copolymers of alkylacrylates with vinyl pyridines and copolymers of alkylmethacrylates with vinylpyridines or combinations thereof.
Claim 7
Dependent Claim
35 words
Biopolymer enulsion as claimed in any one of the claims 1-5 in which the polysaccharide is derived from Xanthomonas campestris NCIB 11808, Xanthomonas campestris NCIB 11854, Pseudomonas sp. NCIB 11624 and Psevadomonas sp. NCIB 11592.
Claim 8
Dependent Claim
38 words
Biopolymer emulsion as claimed in any one of the claims 1-6 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 9
Dependent Claim
36 words
-8. Biopolymer emulsion as claimed in any one of the claims 1-7 in which the hydrophobic liquid is a mixture of a hydrocarbon solvent boiling between 110 and 220°C and a hydrocarbon solvent boiling between 280-400°C.
Claim 10
Dependent Claim
45 words
Biopolymer emulsion as claimed in any one of the claims 1-8 in which the low boiling hydrophobic solvent is selected from the group consisting of "Shellsol TD" or "Q5911" and the high boiling solvent is selected from the group consisting of "Ondina 15", "Risella 15".
Claim 11
Dependent Claim
60 words
Biopolymer emulsion as claimed in any one of the claims 1-9 which 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, 5-25% water and 5-20% of a mixture of sorbitan mono-oleate and sorbitan mono-laurate and/or a mixture of poly-isobutylene-maleic-anhydride-triethylene-tetraamine and bis(2-hydroxyethyl)-tallowamine.
Claim 12
Dependent Claim
36 words
Biopolymer emulsion as claimed in any one of the claims 1-10 which comprises 40-60%wt polysaccharide derived from Xanthomonas campestris NCIB 11854 7-17%wt "Span 20", 3-8%wt "Nonidet-NP50", 1 - 3%wt polymethacrylate, 15-25%wt "Ondina 15" and 3-10%wt water.
Claim 13
Dependent Claim
26 words
Biopolymer emulsion as claimed in any one of the claims 1-11 in which the emulsion comprises a surfactant selected from the group consisting of ethoxylated alkylphenols.
Claim 14
Dependent Claim
42 words
Biopolymer emulsion which is obtained after a biopolymer emulsion as claimed in any one of the claims 1-12 has been subjected to a shear treatement or to milling in a colloid mill whereby the size of the polysaccharide droplets is subtantially reduced.
Claim 15
Dependent Claim
11 words
Biopolymer emulsion as described hereinbefore with particular reference to the Examples.
Claim 16
Dependent Claim
11 words
Biopolymer emulsion as described hereinbefore with particular reference to the Examples.
Claim 17
Dependent Claim
21 words
An aqueous system whenever thickened by the incorporation of a biopolymer emulsion as claimed in any one of the claims 1-14.
Claim 18
Dependent Claim
20 words
A thickened aqueous system as claimed in claim 15 which is a flooding material used in enhanced oil recovery operations.
Claim 19
Dependent Claim
33 words
A process for concentrating a biopolymer emulsion as claimed in any one of the claims 1-14 in which water from the emulsion is removed by evaporation under reduced pressure and at elevated temperature.
Claim 20
Dependent Claim
28 words
A process as claimed in claim 17 in which water removal is continued until the concentration of the biopolymers in the emulsion is in the range of 35-45%wt.
Claim 21
Dependent Claim
23 words
A process as claimed in claim 13 in which the evaporation is carried out in a rota vapor or a wiped film evaporator.
Claim 22
Dependent Claim
32 words
A process as claimed in claim 16 or 17 in which the reduoed pressure is in the range of 1 - 50mn Hg and the temperature is in the range of 40-120°C.
Claim 23
Dependent Claim
28 words
A process as claimed in any one of the claims 16-20 in which the biopolymer emulsion is subjected to a shear treatment or processed through a colloid mill.
Claim 24
Dependent Claim
12 words
A process substantially as hereinbefore described with particular reference to the Examples.
Claim 25
Dependent Claim
12 words
A process substantially as hereinbefore described with particular reference to the Examples.
References Cited (Backward Citations)
No citation records indexed.
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