41
Valerie Niddam, Ramy Lidor Hadas, Revital Lifshitz, Eti Ishai: Hydrolysis of [R(R*,R*)]-2-(4-fluorophenyl)-&bgr;,&dgr;-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino) carbonyl]-1H-pyrrole-1-heptanoic acid esters with calcium hydroxide. Teva Pharmaceutical, Kenyon & Kenyon, March 4, 2003: US06528661 (26 worldwide citation)

The present invention provides a process for preparing atorvastatin hemi-calcium from an atorvastatin ester derivative with calcium hydroxide. The process is conveniently incorporated into a process for preparing atorvastatin hemi-calcium from an acetonide protected, ester protected &bgr;,&dgr;-dihy ...


42
William A Farone, John E Cuzens: Method of removing silica or silicates from solids resulting from the strong acid hydrolysis of cellulosic and hemicellulosic materials. Arkenol, Knobbe Martens Olson & Bear, July 21, 1998: US05782982 (25 worldwide citation)

A method of removing silica or silicates from solids results from the acid hydrolysis of materials containing cellulose and hemicellulose is disclosed. The method includes the steps of treating the solids with a metal hydroxide solution to produce an extract, reducing the pH of the extract to produc ...


43
Roger D Hester, George E Farina, Srikanth Nanguneri: Process for separating acid-sugar mixtures using ion exclusion chromatography. Tennessee Valley Authority, Robert A Petrusek, April 18, 1995: US05407580 (25 worldwide citation)

A process for effectively and economically separating an ionic component such as acid from a nonionic component such as sugar in polar solutions using ion exclusion technology whereby the viability of using hydrolysis to convert wood and agricultural waste products such as corn stover into fuel alco ...


44
Milford Hanna, Gerald Biby, Vesselin Miladinov: Production of microcrystalline cellulose by reactive extrusion. University of Nebraska Lincoln, Shook Hardy & Bacon, May 8, 2001: US06228213 (24 worldwide citation)

This process involves feeding cellulose into an extruder with an acid solution. The extruder is comprised of a screw and a barrel. The screw is rotated so as to pressurize the cellulose, and the cellulose undergoes acid hydrolysis and forms microcrystalline cellulose. The invented process can be acc ...


45
George T Tsao, Michael R Ladisch, Arindam Bose: Acid hydrolysis of cellulose to yield glucose. Purdue Research Foundation, John R Nesbitt, November 20, 1979: US04174976 (24 worldwide citation)

A process to yield glucose from cellulose through acid hydrolysis. Cellulose is recovered from cellulosic materials, preferably by pretreating the cellulosic materials by dissolving the cellulosic materials in Cadoxen or a chelating metal caustic swelling solvent and then precipitating the cellulose ...


46
James L Gaddy, Edgar C Clausen: Method of separation of sugars and concentrated sulfuric acid. Dorsey & Whitney, August 26, 1986: US04608245 (22 worldwide citation)

A method of recovering concentrated sulfuric acid from the product obtained from the acid hydrolysis of a cellulose-containing material such a biomass. The method involves contacting the product with an extraction solvent comprising one or more of the C.sub.4 -C.sub.7 alcohols as the major component ...


47
William A Farone, John E Cuzens: Method for the production of levulinic acid. Arkenol, Knobbe Martens Olson and Bear, April 6, 1999: US05892107 (22 worldwide citation)

A method of producing dehydration products from one or more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40.degree.-240 .degree. C. for 1 to 96 hours in the presence of 10-90% sulfuric acid, separating the reaction products, and recovering levulinic acid. The sugars can b ...


48
Rene Heymes, Andre Lutz: Alkyloximes of 7-amino-thiazolyl-acetamido-cephalosporanic acids. Roussel Uclaf, Hammond & Littell Weissenberger and Muserlian, May 13, 1980: US04202893 (21 worldwide citation)

Novel alkyloximes of 7-amino-thiazolyl-acetamidocephalosporanic acids of the formula ##STR1## wherein R is selected from the group consisting of alkyl of 1 to 5 carbon atoms, cycloalkyl of 3 to 5 carbon atoms and --CH.sub.2 --SR', R' is selected from the group consisting of acyl of an alkanoic acid ...


49
Stoy Vladimir, Stoy Artur, Urbanova Renata, Prokop Jaroslav, Kucera Josef: Method for the acid hydrolysis of acrylonitrile containing polymers, hydrogels and fibers of products prepared by said method. Ceskoslovenska akademie ved No 3 Narodni, Schaffer Murray, July 29, 1975: US3897382 (21 worldwide citation)

There is disclosed a method for the acid hydrolysis of acrylonitrile-containing polymers comprising hydrolyzing said polymers in the presence of about 40 to about 80% concentrated nitric acid at a temperature of about 25 to about 60.degree.C, cooling said acid reaction mixture to about -20.degree. t ...


50
Otavio Vianna Carvalho, Ronaldo Mendonca Mansur, Sandro da Silva Aguiar, Jane Hitoni Fujiyama, Antonio Luiz Ribeiro de Castro: Malonic acid and esters thereof. Trikem, Birch Stewart Kolasch & Birch, May 28, 2002: US06395931 (21 worldwide citation)

A process for preparing malonic acid from the hydrolysis of cyanoacetic acid in the presence of aqueous hydrochloric acid, the process conditions being such that they allow high yields in malonic acid product. The product of said acid hydrolysis is a mixture of malonic acid and ammonium chloride by- ...



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