EP0180366A2
Expired / Lapsed
EP
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Dry polysaccharides
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1985-10-14
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Granted: —
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Expires: 2005-10-14
Abstract
Abstract Powdered polysaccharide may be made by spray drying an emulsion in a non-aqueous liquid of an aqueous solution of the polysaccharide. Spray dried polysaccharides are novel materials. At least 90% by weight of the particles may be within a size range of not more than 100 microns. The particles may have an average size between 50 and 250 microns or between 10 and 50 microns, and the finer particles can be redispersed into oil.
Inventors
- 👤 Kenneth Charles Symes
- 👤 Peter Flesher
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:03
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/122; C08L; C08L5/00; C08J2305/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
41 words
A process of making a dry powdered. polysaccharide characterised in that the process comprises spray drying an emulsion in a non-aqueous liquid of an aqueous solution of the said polysaccharide and thereby producing the powdered polysaccharide substantially free of non-aqueous liquid.
Claim 2
Dependent Claim
41 words
A process of making a dry powdered. polysaccharide characterised in that the process comprises spray drying an emulsion in a non-aqueous liquid of an aqueous solution of the said polysaccharide and thereby producing the powdered polysaccharide substantially free of non-aqueous liquid.
Claim 3
Dependent Claim
44 words
A process according to claim 1 comprising forming the emulsion by emulsifying an aqueous solution of polysaccharide having consistency index above 20,000 cPs into the non-aqueous liquid, and then spray drying the said emulsion and thereby producing powdered polysaccharide substantially free of non-aqueous liquid.
Claim 4
Dependent Claim
35 words
A process according to claim 1 or claim 2 in which the polysaccharide content of the emulsion is from 1 to 15% and the polysaccharide content of the powdered product is above 80% by weight.
Claim 5
Dependent Claim
33 words
A process according to any preceding claim in which the emulsion is stabilised by the presence therein of a stabilising component selected from water-in-oil emulsifiers having HLB below 11 and amphipathic copolymeric stabilisers.
Claim 6
Dependent Claim
26 words
A process according to any preceding claim in which the polysaccharide is a microbial polysaccharide made by fermentation of a microorganism selected from Xanthomonas and Pseudomonas.
Claim 7
Dependent Claim
12 words
.Dry powdered, polysaccharide characterised in that it is a spray dried powder.
Claim 8
Dependent Claim
12 words
.Dry powdered, polysaccharide characterised in that it is a spray dried powder.
Claim 9
Dependent Claim
25 words
Dry powdered, polysaccharide according to claim 6 wherein the polysaccharide is one that, as a 4% aqueous solution, has a consistency index above 20,000 cPs.
Claim 10
Dependent Claim
31 words
Dry powdered polysaccharide characterised in that it is a powder wherein at least 90% by weight of the powder has a particle size range extending over not more than 100 microns.
Claim 11
Dependent Claim
31 words
Dry powdered polysaccharide characterised in that it is a powder wherein at least 90% by weight of the powder has a particle size range extending over not more than 100 microns.
Claim 12
Dependent Claim
27 words
Dry powdered polysaccharide according to claim 8 wherein at least 75% by weight of the particles has a size range extending over not more than 50 microns.
Claim 13
Dependent Claim
20 words
Dry powdered polysaccharide according to claim 8 wherein the average particle size is above 50 microns but below 250 microns.
Claim 14
Dependent Claim
30 words
Dry powdered polysaccharide according to claim 8 wherein the average particle size is between 10 and 50 microns and at least 90% of the particles have a size below,.100 microns.
Claim 15
Dependent Claim
25 words
Dry powdered polysaccharide according to claim 8 made by spray drying an aqueous emulsion in a non-aqueous liquid of an aqueous solution of the polysaccharide.
Claim 16
Dependent Claim
41 words
A polysaccharide dispersion comprising a dispersion of polysaccharide in non-aqueous liquid characterised in that the polysaccharide is present as dry particles of which at least 90% have a size below 100 microns and the average particle size is below 50 microns.
Claim 17
Dependent Claim
41 words
A polysaccharide dispersion comprising a dispersion of polysaccharide in non-aqueous liquid characterised in that the polysaccharide is present as dry particles of which at least 90% have a size below 100 microns and the average particle size is below 50 microns.
Claim 18
Dependent Claim
27 words
A dispersion according to claim 13 in which the particles are coated by stabilising component selected from water-in-oil emulsifiers having HLB below 11 and amphipathic copolymeric stabilisers.
Claim 19
Dependent Claim
43 words
A dispersion according to claim 13 or claim 14 made by forming the particles by spray drying an emulsion in a non-aqueous liquid of an aqueous solution of the polysaccharide and then dispersing the particles in the non-aqueous liquid of the polysaccharide dispersion.
Claim 20
Dependent Claim
15 words
A dispersion according to any of claims 13 to 15 containing 30 to 75% polysaccharide.
Claim 21
Dependent Claim
30 words
A dispersion according to any of claims 13 to 16 wherein the polysaccharide is a microbial polysaccharide which gives a 4% aqueous solution having a consistency index above 20,000 cPs.
References Cited (Backward Citations)
No citation records indexed.
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