Patents Assigned to Ciba Specialty Chemicals Water Treatments Ltd.
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Patent number: 7592164Abstract: A process of producing an amide from a nitrile by the action of a nitrile hydratase enzyme or ammonium salt of an ethylenically unsaturated carboxylic acid from an amide by the action of amidase respectively in which enzymes are obtainable from a microorganism of the Dietzia genus.Type: GrantFiled: November 22, 2004Date of Patent: September 22, 2009Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Jonathan Hughes, Yvonne Armitage
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Patent number: 7582444Abstract: Process for improving the separation efficiency of residual solid matter from the liquid phase of an aqueous acid hydrolysate of a naturally occurring polysaccharide comprising dissolved sugars, and residual acid wherein a flocculating agent(s) is added to the aqueous mixture in an effective amount, and a process of producing fermentation products comprising the steps of, (i) hydrolysing a particulate polysaccharide based plant derived material in an acid medium, and thereby forming an aqueous mixture comprising dissolved sugar and solid matter, (ii) subjecting the aqueous mixture to one or more separation stages in which solid matter are removed from the aqueous phase, (iii) adjusting the pH of the obtained aqueous phase to a pH of at least 4, (iv) fermenting the dissolved sugars of the aqueous phase by a microorganism to produce a fermentation product, (v) isolating the fermentation product, wherein in at least one separation stage in step (ii) a flocculating agent is added to the aqueous mixture in an effeType: GrantFiled: July 28, 2003Date of Patent: September 1, 2009Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventor: Jonathan Hughes
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Patent number: 7582215Abstract: A process of separating suspended solids from a fermentation liquor by subjecting the liquor to a solids-liquid separation stage, wherein the fermentation liquor is produced in a fermentation process for the production of a fermentation product, which liquor comprises water, lignin and BOD, wherein the solids liquid separation stage is assisted by a treatment system, characterised in that the treatment system comprises either, (i) a cationic polymer having an intrinsic viscosity (IV) of at least 4 dl/g at a dose of above 2 kg/tonne based on dry weight of suspension, or (ii) a cationic polymer having an intrinsic viscosity (IV) of at least 4 dl/g and, (iii) an anionic polymer, and/or (iv) a cationic polymer of intrinsic viscosity of below 4 dl/g and a cationic charge density of at least 3 meq/g and/or (v) inorganic coagulants and/or (vi) charged microparticulate material.Type: GrantFiled: July 30, 2003Date of Patent: September 1, 2009Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Jonathan Hughes, Kenneth Charles Symes
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Patent number: 7575912Abstract: A microorganism which is Rhodococcus rhodochrous strain NCIMB 41164 or a mutant thereof. A method of culturing the microorganism in a culture medium comprising urea or urea derivative is claimed. A nitrite hydratase obtainable from the microorganism is claimed. Also claimed is a process of preparing an amide from the corresponding nitrite wherein the nitrite is subjected to a hydration reaction in an aqueous medium in the presence of a biocatalyst selected from the group consisting of a microorganism which is a Rhodococcus rhodochrous strain NUMB 41164, a mutant thereof and a nitrite hydratase obtainable from Rhodococcus rhodochrous strain NCIMB 41164 or a mutant thereof. Also claimed is a method of storing the Rhodococcus rhodochrous NUMB 41164.Type: GrantFiled: November 22, 2004Date of Patent: August 18, 2009Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Jonathan Hughes, Yvonne Armitage, Jatinder Kullar, Stuart Greenhalgh
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Patent number: 7470346Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C., comprising the steps of, i) providing an aqueous liquid having a source of silicate, ii) adjusting the pH of the liquid to between about 2 and about 10.5, thereby causing polymerisation of the silicate, iii) allowing sufficient time for the polymerisation to proceed to substantial completion and thereby forming a product comprising gelled material, iv) subjecting the gelled material to sufficient shear to form a substantially uniform liquid. The novel aqueous composition made by this process is useful in the manufacture of paper and paperboard either as a mineral filler or as a retention/drainage aid.Type: GrantFiled: March 18, 2004Date of Patent: December 30, 2008Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Simon Donnelly, Laurence Rys, Philip Ford
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Patent number: 7455997Abstract: A process of producing fermentation product comprising the steps of, (i) forming an acidified suspension of particulate plant derived material comprising a first polysaccharide which is more readily hydrolysable and a second polysaccharide which is more difficult to hydrolysable, (ii) allowing the first polysaccharide to undergo hydrolysis by action of the acid at a temperature of at least 50° C.Type: GrantFiled: July 28, 2003Date of Patent: November 25, 2008Assignee: Ciba Specialty Chemicals Water Treatments LtdInventor: Jonathan Hughes
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Patent number: 7425597Abstract: The molecular weight of cationic polymers, such as diallyldialkyl ammonium chloride, can be increased by controlled addition of a water-soluble radical initiator at an elevated reaction temperature with agitation to prepare high molecular weight, crosslinked, water-soluble cationic polymers.Type: GrantFiled: May 24, 2007Date of Patent: September 16, 2008Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventor: Zhiqiang Song
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Patent number: 7407561Abstract: The present invention relates to a method for controlling pitch and stickies deposit in a pulp and papermaking process using crosslinked cationic polymers made by controlled addition of a water soluble radical initiator at reaction temperature with agitation for chain extension and crosslinking.Type: GrantFiled: April 20, 2004Date of Patent: August 5, 2008Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Zhiqiang Song, Philip Anson Ford
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Patent number: 7364641Abstract: Process for making paper or paper board comprising, forming an aqueous cellulosic suspension, adding a retention system to the cellulosic suspension, draining the suspension on a screen to form a sheet and drying the sheet, wherein the retention system comprises a swelling clay which has a TAPPI brightness of at least 70.Type: GrantFiled: June 18, 2002Date of Patent: April 29, 2008Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Gordon Cheng Chen, Stephanie Caine Williams, Swindell Allen Grimsley
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Patent number: 7271142Abstract: A particulate composition comprising particles which consist of a shell wall surrounding a hydrophilic core, wherein the shell wall is formed from a polymeric coacervate and wherein the particles comprise a polymeric amphipathic stabiliser. Also claimed is a process of producing a particulate composition comprising particles which consist of a shell wall surrounding a hydrophilic core, comprising the steps of a) forming an aqueous liquid that contains a wall building material that is capable of forming the shell wall by coacervation, b) dispersing the aqueous liquid into a water immiscible liquid, which comprises a stabilising substance to form a dispersion that comprises aqueous droplets dispersed in a continuous phase of water immiscible liquid, c) subjecting the dispersion to coacervation conditions, such that the wall building material coacervates at the surface of the aqueous doplets, characterised in that the stabilising substance comprises a polymeric amphipathic stabiliser.Type: GrantFiled: June 14, 2002Date of Patent: September 18, 2007Assignee: Ciba Specialty Chemicals Water Treatments LtdInventors: Kishor Kumar Mistry, Bryan David Grey
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Patent number: 7255728Abstract: Apparatus and method for degassing liquids particularly cationic monomers. Fluid comprising liquid to be degassed together with sweep gas is admitted tangentially into a column (10) and forced down the column by a tubular baffle (16) which defines, with the inner wall of the column, an annulus (18) that is closed at its top (20). After passing to the bottom of the annulus the fluid forms an even film over the inner surface of the column and gas disengaging from the liquid can rise up the column while liquid accumulates at the bottom of the column. To assist the disengagement of the gas from the liquid the column is preferably of increasing cross section towards the bottom so that the thickness of the film is also reduced.Type: GrantFiled: January 23, 2003Date of Patent: August 14, 2007Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Jonathan Heath Veal, Martin David Powell, Simon Broughton, Gareth Ian Naylor
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Publication number: 20070184535Abstract: A process of producing an amide from a nitrile by the action of a nitrile hydratase enzyme or ammonium salt of an ethylenically unsaturated carboxylic acid from an amide by the action of amidase respectively in which enzymes are obtainable from a microorganism of the Dietzia genus.Type: ApplicationFiled: November 22, 2004Publication date: August 9, 2007Applicant: CIBA SPECIALTY CHEMICALS WATER TREATMENTS LTDInventors: Jonathan Hughes, Yvonne Armitage
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Publication number: 20070184536Abstract: A process for preparing a polymer of an ethylenically unsaturated monomer, in which the monomer is obtainable from a biocatalysed reaction or a fermentation process, and wherein the monomer contains cellular material and/or components of a fermentation broth, forming the polymer by polymerising the ethylenically unsaturated monomer or a monomer mixture comprising the ethylenically unsaturated monomer, wherein there is substantially no removal of the cellular material and/or components of the fermentation broth from the ethylenically unsaturated monomer.Type: ApplicationFiled: November 22, 2004Publication date: August 9, 2007Applicant: CIBA SPECIALTY CHEMICALS WATER TREATMENTS LTDInventors: Stuart Greenhalgh, Kenneth Symes, Yvonne Armitage, Jonathan Hughes, Gary Richardson
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Patent number: 7252783Abstract: A method of dewatering a suspension of solids in an aqueous medium, comprising introducing into the suspension a flocculating system, which flocculation system comprises, a) a substantially non-ionic water-soluble polymer and b) a cationic polymeric flocculant of intrinsic viscosity at least 4 dl/g, thereby causing the solids to flocculate, separating the flocculated from aqueous medium, characterized in that i) the components a) and b) are introduced into the suspension as an aqueous blend; or ii) component a) is a non-ionic polymer that has an average molecular weight of below 750,000 and components a) and b) are introduced into the suspension as an aqueous blend or separately. Also claimed is an aqueous composition comprising the substantially non-ionic water-soluble polymer and cationic polymer, method for making it and a composition comprising a blend of substantially anhydrous particles of component (a) and component (b).Type: GrantFiled: April 2, 2002Date of Patent: August 7, 2007Assignee: Ciba Specialty Chemicals Water Treatments LTDInventors: Steven Weir, Janine Marie Griffith, Simon Paul Oldfield
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Patent number: 7244361Abstract: A metals/minerals recovery and waste treatment process comprising a main separation stage in which a metal/mineral-bearing ore is slurried with water and separated into an enriched fraction and an aqueous metal/mineral waste fraction, and a waste sedimentation stage in which the aqueous metal/mineral waste fraction is sedimented in one or more settling lagoons to provide a thickened sediment layer and supernatant; and the waste sedimentation stage comprises feeding the aqueous metal/mineral waste into a solids contact vessel or other flocculating chamber, wherein the aqueous metal/mineral waste is diluted with water containing one or more flocculant(s) at more than one concentration, one of which concentrations is at least 10 times higher than the other, within the SCV, flocculating the diluted aqueous waste, and sedimenting the diluted and flocculated aqueous waste to provide a liquid supernatant layer and a pumpable thickened sediment layer in a settling basin.Type: GrantFiled: August 9, 2004Date of Patent: July 17, 2007Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventor: Patrick Joseph Dwyer
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Patent number: 7238752Abstract: The molecular weight of cationic polymers, such as diallyldialkyl ammonium chloride, can be increased by controlled addition of a water-soluble radical initiator at an elevated reaction temperature with agitation to prepare high molecular weight, crosslinked, water-soluble cationic polymers.Type: GrantFiled: July 27, 2005Date of Patent: July 3, 2007Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventor: Zhiqiang Song
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Patent number: 7205369Abstract: The molecular weight of cationic polymers, such as diallyldialkyl ammonium chloride, can be increased by controlled addition of a water-soluble radical initiator at an elevated reaction temperature with agitation to prepare high molecular weight, crosslinked, water-soluble cationic polymers.Type: GrantFiled: August 12, 2003Date of Patent: April 17, 2007Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventor: Zhiqiang Song
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Publication number: 20060207946Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is transferred as a fluid to a deposition area, then allowed to stand and rigidify, and in which rigidification is improved whilst retaining the fluidity of the material during transfer, by combining with the material an effective rigidifying amount of aqueous solution of a water-soluble polymer. The process is particularly suitable for the treatment of the tailings underflow resulting from a mineral processing operation and the co-disposal of fine and coarse tailings fractions. In addition, liquor released during the rigidification step is of high clarity.Type: ApplicationFiled: January 7, 2004Publication date: September 21, 2006Applicant: CIBA SPECIALTY CHEMICALS WATER TREATMENTS LTDInventors: Philip McColl, Stephen Scammell
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Patent number: 7084205Abstract: Compositions comprising of blends of polymeric materials, including a cationic polymer having an intrinsic viscosity of from 8 to 17 dl/g and a cationic content of from 20 to 100% which may be used in the dewatering of thermophilic sludges.Type: GrantFiled: August 14, 2001Date of Patent: August 1, 2006Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Peter Ian Norman, Helen Elizabeth Read, Nils Berggren
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Patent number: RE39188Abstract: Large crop areas are irrigated, for instance by pivot irrigation, by being sprayed with water into which a substantially stable dispersion in a liquid of water soluble polymer particles has been metered at a predetermined low rate.Type: GrantFiled: December 10, 2001Date of Patent: July 18, 2006Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Robin Cole, Richard E. Cole