Patents by Inventor John Ridland
John Ridland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8178068Abstract: A catalyst charge for ammonia oxidation, including the Andrussow process, comprises a first stage ammonia oxidation catalyst capable of oxidizing 20 to 99% of designed ammonia throughput, to produce a first stage product gas comprising unreacted ammonia, oxygen and nitrogen oxides, and a second stage ammonia oxidation catalyst capable of completing the oxidation of unreacted ammonia. Low levels of nitrous oxide are produced an extended campaign lengths may be seen.Type: GrantFiled: April 27, 2004Date of Patent: May 15, 2012Assignee: Johnson Matthey PLCInventors: Sean Alexander Axon, Duncan Roy Coupland, Brian Thomas Horner, John Ridland, Ian Carmichael Wishart
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Publication number: 20070031314Abstract: A catalyst charge for ammonia oxidation, including the Andrussow process, comprises a first stage ammonia oxidation catalyst capable of oxidising 20 to 99% of designed ammonia throughput, to produce a first stage product gas comprising unreacted ammonia, oxygen and nitrogen oxides, and a second stage ammonia oxidation catalyst capable of completing the oxidation of unreacted ammonia. Low levels of nitrous oxide are produced an extended campaign lengths may be seen.Type: ApplicationFiled: April 27, 2004Publication date: February 8, 2007Inventors: Sean Axon, Duncan Coupland, Brian Horner, John Ridland, Ian Carmichael Wishart
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Patent number: 6762314Abstract: An organometallic composition is described which comprises a complex of at least one orthoester of a metal having a formula M(ROAcAc)x(OR′)y in which M is selected from the group consisting of titanium, zirconium and hafnium; ROAcAc denotes an ester of an alochol ROH, in which R comprises an (optionally substituted) C1-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, with acetoacetic acid; OR′ is the residue of an alcohol R′OH in which R′ comprises an (optionally substituted) C7-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, and x and y are each in the range 1-3. The composition is useful as a curing agent for polyurethanes used in various applications.Type: GrantFiled: July 11, 2002Date of Patent: July 13, 2004Assignee: Imperial Chemical Industries PLCInventors: Martin G Partridge, Bruno F Stengel, John Ridland
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Publication number: 20030009043Abstract: An organometallic composition is described which comprises a complex of at least one orthoester of a metal having a formula M(ROAcAc)x(OR′)y in which M is selected from the group consisting of titanium, zirconium and hafnium; ROAcAc denotes an ester of an alochol ROH, in which R comprises an (optionally substituted) C1-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, with acetoacetic acid; OR′ is the residue of an alcohol R′OH in which R′ comprises an (optionally substituted) C7-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, and x and y are each in the range 1-3. The composition is useful as a curing agent for polyurethanes used in various applications.Type: ApplicationFiled: July 11, 2002Publication date: January 9, 2003Applicant: Imperial Chemical Industries PLCInventors: Martin G. Partridge, Bruno F. Stengel, John Ridland
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Publication number: 20020087027Abstract: A catalyst composition suitable for use as a catalyst for the preparation of an ester comprises (a) an organometallic compound which is the reaction product of an orthoester or condensed orthoester of titanium, zirconium or aluminum, an alcohol containing at least two hydroxyl groups, an organophosphorus compound containing at least one P—OH group and preferably a base, and (b) a compound of germanium, antimony or tin. A process for the preparation of an ester comprises carrying out an esterification reaction in the presence of the catalyst composition. In a further embodiment the organometallic compound comprises the reaction product of, in addition, a 3-hydroxy carboxylic acid.Type: ApplicationFiled: November 26, 2001Publication date: July 4, 2002Applicant: ACMA LimitedInventors: Charles M. Lindall, John Ridland, Neville Slack
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Patent number: 6372929Abstract: An organometallic compound suitable for use as a catalyst for the preparation of an ester comprises the reaction product of an orthoester or condensed orthoester of titanium, zirconium or aluminum, an alcohol containing at least two hydroxyl groups, an organophosphorus compound containing at least one P—OH group and a base. A process for the preparation of an ester comprises carrying out an esterification reaction in the presence of the catalyst In a further embodiment the organometallic compound suitable for use as a catalyst in an esterification process comprises the reaction product of, in addition, a 2-hydroxy carboxylic acid.Type: GrantFiled: May 9, 2000Date of Patent: April 16, 2002Assignee: ACMA LimitedInventors: John Ridland, Iain Wesley Hepplewhite
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Patent number: 5866710Abstract: A process for the preparation of an ester comprises carrying out an esterification in the presence of a catalyst comprising the reaction product of an orthoester or a condensed orthoester of titanium or zirconium, an alcohol containing at least two hydroxyl groups, a 2-hydroxy acid and a base. The process can be a direct esterification or a transesterification and can be a polyesterification. The catalyst can effectively produce esters without leading to a haze in the final product and there is a reduced amount of yellowing of polyesters in comparison to known catalysts.Type: GrantFiled: June 5, 1997Date of Patent: February 2, 1999Assignee: Tioxide Specialties LimitedInventors: John Ridland, Iain Wesley Hepplewhite, Brian Steven Jolly
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Patent number: 5688894Abstract: A method of curing a powder coating composition comprises reacting a polyester resin with an alkanolamine derivative of titanium or zirconium. This derivative is the reaction product of an orthoester or a condensed orthoester of titanium or zirconium with a trialkanolamine and with a dialkanolamine or a monoalkanolamine. In the reaction product the ratio of trialkanolamino radicals to Ti or Zr atoms is from 0.5:1 to 1.5:1 and the ratio of monoalkanolamino radicals or dialkanolamino radicals to Ti or Zr atoms is from 0.2:1 to 2.0:1. The reaction products are preferably derivatives of ethanolamines or isopropanolamines and can be used to cure carboxyl-rich resins or hydroxyl-rich resins.Type: GrantFiled: June 20, 1995Date of Patent: November 18, 1997Assignee: Tioxide Specialties LimitedInventor: John Ridland
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Patent number: 5391643Abstract: The invention consists of a new method of curing a polyester powder coating composition. The resin is cured by the use of an organotitanium or organozirconium derivative of an alkanolamine having the formula M.sub.3 [(OR).sub.3 N].sub.4 or O[M(OR).sub.3 N].sub.2 or R.sup.1 [OM(OR).sub.3 N].sub.x where M represents Ti or Zr, R represents a divalent aliphatic radical, x is 1 to 4 and R .sup.1 is a saturated hydrocarbyl group or a group containing one or more ether linkages. The method is suitable for use with both hydroxyl-rich and carboxyl-rich polyester resins and the cured coatings have desirable physical properties.Type: GrantFiled: May 11, 1994Date of Patent: February 21, 1995Assignee: Tioxide Specialties LimitedInventors: John Ridland, Brian S. Jolly
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Patent number: 5089149Abstract: An organometallic compound which is the reaction product of (a) a zirconium halide or oxyhalide, (b) a polyol and (c) an alpha-hydroxy acid is claimed. The preferred polyol is sorbitol and preferred alphahydroxy acids are citric, malic or lactic acid. The compounds find use as cross-linking agents in fracturing fluids employed in the hydraulic fracturing of oil or gas-containing subterranean strata. The claimed compounds can be used to produce a slow or delayed gel formation in such fluids.Type: GrantFiled: December 1, 1989Date of Patent: February 18, 1992Assignee: Tioxide Group plcInventors: John Ridland, David A. Brown