Patents by Inventor Alan Geoffrey Waite
Alan Geoffrey Waite 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: 11472829Abstract: A method of processing an aqueous hemicellulosic stream containing lignin, comprising: (a) contacting an aqueous hemicellulosic stream containing lignin with a C3-8 alkyl alcohol at elevated temperature and acidic pH; (b) separating the reaction mixture obtained from step (a) into an aqueous phase containing hemicellulose-derived monosaccharide and an organic phase containing C3-8 alkyl alcohol; (c) concentrating the organic phase obtained from step (b) to remove at least some C3-8 alkyl alcohol; (d) treating the residue from step (c) with water or an aqueous medium having an alkaline pH; and (e) recovering C3-8 alkyl alcohol from the product of step (d).Type: GrantFiled: February 23, 2018Date of Patent: October 18, 2022Assignee: SAPPI BIOTECH UK LIMITEDInventors: Edward Leslie Marshall, Alan Geoffrey Waite, David Peter Gibney
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Publication number: 20190382431Abstract: A method of processing an aqueous hemicellulosic stream containing lignin, comprising: (a) contacting an aqueous hemicellulosic stream containing lignin with a C3-8 alkyl alcohol at elevated temperature and acidic pH; (b) separating the reaction mixture obtained from step (a) into an aqueous phase containing hemicellulose-derived monosaccharide and an organic phase containing C3-8 alkyl alcohol; (c) concentrating the organic phase obtained from step (b) to remove at least some C3-8 alkyl alcohol; (d) treating the residue from step (c) with water or an aqueous medium having an alkaline pH; and (e) recovering C3-8 alkyl alcohol from the product of step (d).Type: ApplicationFiled: February 23, 2018Publication date: December 19, 2019Inventors: Edward Leslie Marshall, Alan Geoffrey Waite, David Peter Gibney
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Patent number: 9023329Abstract: Polyester oil structurants are obtainable by the reaction of a C4 to C10 Q dicarboxylic acid, a polyol and a C16 to C30, particularly a C20 to C24, monocarboxylic fatty acid. The structurants can be used to provide structure, particularly thickening and/or gelling, in oils of a wide range of polarity. Thickened oils can find application in a range of personal care and other applications.Type: GrantFiled: December 21, 2006Date of Patent: May 5, 2015Assignee: Croda International, PLCInventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite, Thomas Phillip Wells
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Patent number: 8722814Abstract: Polyglycerol carboxylic acid esters are made by reaction of a, typically C2 to C30, particularly C6 to C22, carboxylic acid with glycerol carbonate, particularly with base catalyst, and desirably at temperatures from 170° C. to 250° C. Other carbonates e.g. cyclic diol carbonates such as ethylene or propylene carbonates, may be used in combination with the glycerol carbonate to make novel mixed polymeric esters. The molar ratio of carboxylic acid group to glycerol carbonate is typically from 2 to 30, but can be up to 100. The base catalyst is desirably alkali metal hydroxide, carbonate or alkoxide. The reaction is desirably carried out in an inert atmosphere, and reducing agent such as phosphorous acid, hypophosphorous acid or borohydride and/or activated carbon, may be included to improve product color.Type: GrantFiled: May 15, 2008Date of Patent: May 13, 2014Assignee: Croda International PLCInventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite, Jackie Frank
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Patent number: 8709168Abstract: Hard surfaces can be treated to improve soil resistance, particularly resistance to oily soils, by applying a composition of a quaternised, polyamine, polypropoxylate, polyethoxylate. The polyamine can be a polyethyleneimme, desirably having a molecular weight of from 10 to 50 kDa. The average length of the polypropylenoxy chains is desirably from 10 to 100 and the polyethylenoxy chains from 5 to 50 (each per NH group in the polyamine), particularly at a molar ratio of PO:EO of about 3:1. The degree of quaternization of the nitrogen atoms in the polyamine is desirably from 70 to 100%. The polymer will usually be used in solution in water or an aqueous formulation, which may include detergent and other detergent formulation components.Type: GrantFiled: October 4, 2010Date of Patent: April 29, 2014Assignee: Croda International PLCInventors: Alan Geoffrey Waite, Trevor Graham Blease, Sean Alexander Robins
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Publication number: 20120208736Abstract: Hard surfaces can be treated to improve soil resistance, particularly resistance to oily soils, by applying a composition of a quaternised, polyamine, polypropoxylate, polyethoxylate. The polyamine can be a polyethyleneimme, desirably having a molecular weight of from 10 to 50 kDa. The average length of the polypropylenoxy chains is desirably from 10 to 100 and the polyethylenoxy chains from 5 to 50 (each per NH group in the polyamine), particularly at a molar ratio of PO:EO of about 3:1. The degree of quaternisation of the nitrogen atoms in the polyamine is desirably from 70 to 100%. The polymer will usually be used in solution in water or an aqueous formulation, which may include detergent and other detergent formulation components.Type: ApplicationFiled: October 4, 2010Publication date: August 16, 2012Applicant: Croda International PLCInventors: Alan Geoffrey Waite, Trevor Graham Blease, Sean Robins
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Patent number: 8097564Abstract: Oligoesters including residues of alk(en)yl succinic anhydrides and polyols having at least 3 OH groups, optionally further esterified with fatty acid residues are surfactants which can be used for emulsifiers or similar uses. The surfactants are usually made from C8 to C30 alk(en)yl succinic anhydride and polyols having at least 4 hydroxyl groups and are particularly of the formula (I): R1—[OR2O(O)C.C(HR3).(HR4)C.C(O)]m—R5 (I), where R1, R2, R3, R4, R5, R6, R7 and m have defined meanings. The surfactants are useful as emulsifiers, particularly oil in water emulsifiers.Type: GrantFiled: November 14, 2007Date of Patent: January 17, 2012Assignee: Croda International PLCInventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite
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Publication number: 20100331191Abstract: Oligoesters including residues of alk(en)yl succinic anhydrides and polyols having at least 3 OH groups, optionally further esterified with fatty acid residues are surfactants which can be used for emulsifiers or similar uses. The surfactants are usually made from C8 to C30 alk(en)yl succinic anhydride and polyols having at least 4 hydroxyl groups and are particularly of the formula (I): R1—[OR2O(O)C.C(HR3).(HR4)C.C(O)]m—R5 (I), where R1, R2, R3, R4, R5, R6, R7 and m have defined meanings. The surfactants are useful as emulsifiers, particuarly oil in water emulsifiers.Type: ApplicationFiled: November 14, 2007Publication date: December 30, 2010Applicant: Croda International PLCInventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite
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Publication number: 20100184871Abstract: Polyglycerol ethers of sorbitan carboxylic acid, particularly C8 to C22 carboxylic acid, esters are new surfactant compounds, useful as emulsifiers. Desirable compounds are of the formula (I): Sor(R1)(R2)(R3)(R4) where R1, R2, R3, R4 have defined meanings such that at least one group is of the formula (II): -G2CR5, where R5 is a C7 to C21 hydrocarbyl group, and at least one is of the formula (III): -[Gly]-[AO]m-H where Gly is a glycerol residue, AO is an alkyleneoxy residue of a corresponding diol cyclic carbonate, in any order; n is an average of from 0 to 100; and m is an average of from 0 to 75; such that the total of all the indices n is at least 1.Type: ApplicationFiled: July 30, 2008Publication date: July 22, 2010Inventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite, Jackie Frank
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Publication number: 20100183534Abstract: Polyester oil structurants are obtainable by the reaction of a C4 to C10 Q dicarboxylic acid, a polyol and a C16 to C30, particularly a C20 to C24, monocarboxylic fatty acid. The structurants can be used to provide structure, particularly thickening and/or gelling, in oils of a wide range of polarity. Thickened oils can find application in a range of personal care and other applications.Type: ApplicationFiled: December 21, 2006Publication date: July 22, 2010Inventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite, Thomas Phillip Wells
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Publication number: 20100144978Abstract: Polyglycerol carboxylic acid esters are made by reaction of a, typically C2 to C30, particularly C6 to C22. carboxylic acid with glycerol carbonate, particularly with base catalyst, and desirably at temperatures from 170° C. to 250° C. Other carbonates e.g. cyclic diol carbonates such as ethylene or propylene carbonates, may be used in combination with the glycerol carbonate to make novel mixed polymeric esters. The molar ratio of carboxylic acid group to glycerol carbonate is typically from 2 to 30, but can be up to 100. The base catalyst is desirably alkali metal hydroxide, carbonate or alkoxide. The reaction is desirably carried out in an inert atmosphere, and reducing agent such as phosphorous acid, hypophosphorous acid or borohydride and/or activated carbon, may be included to improve product colour.Type: ApplicationFiled: May 18, 2008Publication date: June 10, 2010Inventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite, Jackie Frank
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Publication number: 20100047194Abstract: Polyester oil structurants are obtainable by the reaction of a dimer based dicarboxylic acid, a polyol and a C16 to C30, particularly a C20 to C24, monocarboxylic fatty acid. The structurants can be used to provide structure, particularly thickening and/or gelling, in oils of a wide range of polarity. Thickened oils can find application in a range of personal care and other applications.Type: ApplicationFiled: April 12, 2007Publication date: February 25, 2010Applicant: CRODA INTERNATIONAL PLCInventors: Hanamanthsa Shankarsa Bevinakatti, Alan Geoffrey Waite