Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7692041 | Method of oxidation using nitric acid A controlled nitric acid process employing oxygen and nitric acid as co-oxidants is used to oxidize organic compounds subject to nitric acid oxidation, to their corresponding carboxylic acids. Oxidation of some carbohydrates by this process can produce one or more o... | 04/06/2010 |
| 7312357 | Process for producing aliphatic dicarboxylic acid compound The present invention discloses a process for producing an aliphatic dicarboxylic acid compound, which comprises oxidizing, with a nitrite or a nitrate in the presence of trifluoroacetic acid, an alicyclic secondary alcohol compound or an alicyclic ketone compound, ... | 12/25/2007 |
| 7247722 | Polysaccharide aldehydes prepared by oxidation method and used as strength additives in papermaking Polysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective alde... | 07/24/2007 |
| 7173149 | Process for preparing alkynecarboxylic acids by oxidation of alkyne alcohols A process for preparing alkynecarboxylic acids includes the oxidation of an alkyne alcohol with a hypohalite in the presence of a nitroxyl compound at a pH of greater than 7 with continual addition of the alkyne alcohol and of the hypohalite to the reaction mixture.... | 02/06/2007 |
| 7126024 | Process and catalyst for dehydrogenating primary alcohols to make carboxylic acid salts This invention is directed to a process for making a salt of a carboxylic acid. The process comprises contacting a catalyst with an alkaline mixture comprising a primary alcohol. In one embodiment, the catalyst comprises a metal supporting structure (preferably a me... | 10/24/2006 |
| 7084300 | Work-up of residues in the preparation of carboxylic acids Degradation acids obtained in the synthesis of carboxylic acids, in particular dicarboxylic acids, having from 8 to 16 carbon atoms may be isolated by separating the degradation acids in the form of a solid from the crude reaction mixture, then washing the degradati... | 08/01/2006 |
| 7038078 | Methods of synthesizing and using derivatives of [2-(2-aminoethoxy)ethoxy] acetic acid A synthetic reaction to produce [2-(2-aminoethoxy)ethoxy] acetic acid (AEEA) derivatives. This synthetic reaction does not require isolation and purification of intermediates. The AEEA derivatives can be used to synthesize high load polystyrene-polyethylene glycol-l... | 05/02/2006 |
| 7019167 | Process for producing alkanedicarboxylic acid A method for manufacturing an alkanedicarboxylic acid by oxidizing cycloalkanol and/or cycloalkanone with an aqueous solution of nitric acid, which comprises using an adiabatic reactor comprising a feed nozzle enabling to feed cycloalkanol and/or cycloalkanone at a ... | 03/28/2006 |
| 6956086 | Water dispersible epoxy resins A amidoamine composition containing oligomeric amidoamine compounds having the structure: the average of x based on the amidoamine composition is at least 0.2, and Z is the residue of a polyoxyalkylene polyether polyca... | 10/18/2005 |
| 6918958 | Acid pigment dispersants and pigment preparations The invention relates to pigment dispersants of the formula (I), and to pigment preparations including at least one organic pigment and at least one pigment disperant of the formula (I): wherein Q1, R1 | 07/19/2005 |
| 6891064 | Process for producing fluoroalkylcarboxylic acid The present invention provides a process for producing a fluoroalkylcarboxylic acid of the formula RfCOOH wherein Rf is a C1-16 fluoroalkyl group, which comprises oxidizing a fluoroalkyl alcohol of the formula RfCH2OH wherein Rf is as defined a... | 05/10/2005 |
| 6822117 | Method for making adipic acid The present invention relates to a process for the manufacture of adipic acid, more particularly of adipic acid crystals. It relates more specifically to a process for the treatment of the adipic acid crystals obtained on conclusion of crystallization, which ... | 11/23/2004 |
| 6498269 | Method for the oxidation of aldehydes, hemiacetals and primary alcohols A method for the oxidation of substrates comprising treating an aqueous, basic solution of a substrate having an oxidizable functionality using an elemental halogen as terminal oxidant in the presence of an oxoammonium catalyst/halide co-catalyst system. ... | 12/24/2002 |
| 6465686 | Halogenated 2-amino-5,6 heptenoic acid derivatives useful as nitric oxide synthase inhibitors The present invention discloses halogenated 2-amino-5,6 heptenoic acid derivatives useful as nitric oxide synthase inhibitors.... | 10/15/2002 |
| 6235931 | Partial oxidation of polyoxyalkylene polyol compositions to polycarboxylic acid compositions A process for partially oxidizing and converting a polyoxyalkylene polyol composition to a polycarboxylic acid composition comprising reacting a polyoxyalkylene polyol composition with a stable free radical nitroxide in the presence of an NOx g... | 05/22/2001 |
| 6051734 | Process for the optical resolution of 3-(p-chlorophenyl)-glutaramide A process for the optical resolution of racemic 3-(p-chlorophenyl)glutaramide (GAM) into its R isomer R--COOH and its S isomer S--COOH, which process includes the steps of either: (1) reacting racemic 3-(p-chlorophenyl)-glutaramide dissolved in a suitable ... | 04/18/2000 |
| 6049004 | Nitric acid removal from oxidation products A method for synthesizing and isolating an oxidation product is disclosed wherein nitric acid is reacted with an oxidizable reactant and the desired oxidized product is extracted using an organic solvent such as a dialkyl ether. The method permits the dir... | 04/11/2000 |
| 5608107 | Preparation of alkoxyalkanoic acids A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a resin-supported stable free radical nitroxide in the presence of a chlorine-containing oxidant and a solvent at a temperature in the range of from about 0° ... | 03/04/1997 |
| 5608106 | Preparation of alkoxyalkanoic acids A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a resin-supported stable free radical nitroxide in the presence of a NOx -generating compound and, optionally, an oxidant and/or a solvent at a temp... | 03/04/1997 |
| 5504246 | Process for preparing carboxylates of alkylpolyoxyalkylenes A process for preparing carboxylates of polyoxyalkylene siloxanes and -amines, alkylpolyoxyalkylenes, polyoxyalkylene block polymers, alkylamidepolyoxyalkylenes and alkylpolyglucosides comprising subjecting a primary hydroxyl group-containing polyoxyalkyl... | 04/02/1996 |
| 5495045 | Process for the preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a cerium salt, a highly polar solvent, an oxidant and water, at a temperature in the range of from ... | 02/27/1996 |
| 5488154 | Process for the preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a chromium (II) salt, a highly polar solvent, an oxidant and water, at a temperature in the range o... | 01/30/1996 |
| 5401874 | Preparation of alkoxyalkanoic acids A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a NOx -generating compound and, optionally, an oxidant at a temperature in the range of from abou... | 03/28/1995 |
| 5391822 | Process for the preparation of branched alkoxyalkanoic acids A process for the preparation of a branched alkoxyalkanoic acid by reacting the corresponding branched alkoxyalkanol with a stable free radical nitroxide in the presence of a NOX -generating compound at a temperature in the range of from about ... | 02/21/1995 |
| 5380930 | Process for the preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a NOx -generating compound, a solvent and an oxidant, at a temperature in the range of f... | 01/10/1995 |
| 5352824 | Process for the preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a metal salt selected from the group consisting of a copper salt, an iron salt and mixtures thereof... | 10/04/1994 |
| 5250727 | Preparation of alkoxyalkanoic acids A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a NOx -generating compound and, optionally, an oxidant and/or a solvent, at a temperature in the ... | 10/05/1993 |
| 5239116 | Preparation of secondary alkoxyalkanoic acids A process for the preparation of a secondary alkoxyalkanoic acid by reacting the corresponding secondary alkoxyalkanol with a stable free radical nitroxide in the presence of a NOx -generating compound and an oxidant at a temperature in the ran... | 08/24/1993 |
| 5179218 | Process for the oxidation of alcohols to acids A process for the preparation of an alkanoic acid which comprises reacting the corresponding alkanol with a solubilized stable free radical nitroxide having the formula: ##STR1## wherein each of R1, R2, R3 and R4... | 01/12/1993 |
| 5175359 | Preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid of the formula RO(CH2 CHR'O)n CH2 CO2 H wherein R is an alkyl group of from 1 to about 22 carbon atoms, R' is hydrogen or methyl or mixtures thereof (on the individu... | 12/29/1992 |
| 5166423 | Process for the oxidation of alcohols to acids A process for the preparation of an alkanoic acid which comprises reacting the corresponding alkanol with a solubilized stable free radical nitroxide having the formula: ##STR1## wherein each of R1, R2, R3 and R4... | 11/24/1992 |
| 5166422 | Process for the oxidation of alcohols to acids A process for the preparation of an alkanoic acid which comprises reacting the corresponding alkanol with a solubilized stable free radical nitroxide having the formula: ##STR1## wherein each of R1, R2, R3 and R4... | 11/24/1992 |
| 5162579 | Preparation of alkoxyalkanoic acids A process for the preparation of an alkoxyalkanoic acid of the formula RO(CH2 CHR'O)n CH2 CO2 H wherein R is an alkyl group of from 1 to about 22 carbon atoms, R' is hydrogen or methyl or mixtures thereof (on the individu... | 11/10/1992 |
| 5122307 | Process for the oxidation of alcohols to acids The instant invention relates to a process for the oxidation of primary alcohols to the corresponding acids, which comprises contacting and thereby reacting an alcohol with oxygen and a tertiary amine oxide compound at elevated temperatures in the presenc... | 06/16/1992 |
| 5122308 | Process for the oxidation of alcohols to acids The instant invention relates to a process for the oxidation of primary alcohols to the corresponding acids, which comprises contacting and thereby reacting an alcohol with a tertiary amine oxide compound at elevated temperatures in the presence of a homo... | 06/16/1992 |
| 4966993 | Process for preparation of 3-hydroxy-3-methyl-glutaric acid For the preparation of 3-hydroxy-3-methyl-glutaric acid a process is disclosed based on the direct oxidation with nitric acid of 3-methyl-1,3,5-pentanetriol.... | 10/30/1990 |
| 4532079 | Process for the preparation of carboxylic acids starting from olefines or vicinal dihydroxy compounds Process for the preparation of a monocarboxylic or dicarboxylic acid by oxidative scission of an olefine or its corresponding vicinal dihydroxy compound. An olefine of the formula R1 --CH.dbd.CH--R2 or R1 --CH.dbd.CH2... | 07/30/1985 |
| 4442303 | Recovery of water miscible organic acids from aqueous solution as alkyl esters In one of its embodiments this invention provides a process for recovering C4 -C6 dicarboxylic acid components contained in a waste byproduct stream derived from a reaction system in which adipic acid is produced by nitric acid oxida... | 04/10/1984 |
| 4375552 | Nitric acid process for production of adipic acid from hydrocarbons Waste streams from adipic acid manufacture containing nitric, succinic, glutaric and adipic acids and valuable catalytic metal as salts are treated with alcohols, thereby separating, as esters, succinic and glutaric acids which would contaminate pure adip... | 03/01/1983 |
| 4259524 | Method for producing dibasic fatty acid using liquid nitrogen dioxide (N2 O4) as reacting agent A method for the oxidation of alicyclic hydrocarbons having substituent groups by the use of liquid nitrogen dioxide (N2 O4).... | 03/31/1981 |
