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Class Information
Number: 564/420
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Amino nitrogen containing (e.g., urea, sulfonamides, nitrosamines, oxyamines, etc., and salts thereof) > Benzene ring containing > Forming amine group directly by reduction > Of nitro or nitroso > By direct hydrogenation
Description: Processes wherein the nitro or nitroso group is reduced by addition of hydrogen.










Sub-classes under this class:

Class Number Class Name Patents
564/421 Group vi metal containing catalyst utilized 55
564/422 Group viii metal containing catalyst utilized 136


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8614355 Catalyst and process for hydrogenating organic compounds Dec. 24, 2013
8614356 Method for producing toluylenediamine by hydrogenating dinitrotoluene Dec. 24, 2013
8609899 Process for preparing toluenediamine by hydrogenation of dinitrotoluene Dec. 17, 2013
8293673 Process for preparing 4-aminodiphenylamine Oct. 23, 2012
8110073 Process for the preparation of aromatic amines Feb. 7, 2012
7795472 Process for producing 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propane- diol hydrochloride and hydrates thereof, and intermediates in the production thereof Sep. 14, 2010
7750188 System and process for the production of aniline and toluenediamine Jul. 6, 2010
7595424 Method for producing aromatic amines or aliphatic amino alcohols Sep. 29, 2009
7595029 Monolith catalytic reactor coupled to static mixer Sep. 29, 2009
7511176 Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes Mar. 31, 2009
7504539 Process for preparing 4-aminodiphenylamine intermediates Mar. 17, 2009
7488850 Process for removing compounds containing phenolic hydroxy groups from aromatic amines Feb. 10, 2009
7193112 Process for the production of aromatic amines by heterogeneously catalysed hydrogenation Mar. 20, 2007
7183439 Process for preparing 4-aminodiphenylamine intermediates Feb. 27, 2007
7176333 Process for preparing 4-aminodiphenylamine Feb. 13, 2007
7157605 Method for preparing 4-aminodiphenylamine Jan. 2, 2007
7122701 Process for preparing aromatic amines Oct. 17, 2006
7109378 Monolith catalytic reactor coupled to static mixer Sep. 19, 2006
6965053 Process for the production of aromatic amines Nov. 15, 2005
6894193 Method for hydrogenating liquid organic compounds May. 17, 2005
6815562 Process for the preparation of nitrodiphenylamines Nov. 9, 2004
6703525 Sulfonamide intermediates and methods of producing same Mar. 9, 2004
6583320 Process for preparing 4-aminodiphenylamine intermediates Jun. 24, 2003
6521791 Process for regenerating a monolith hydrogenation catalytic reactor Feb. 18, 2003
6495723 Zeolite support loaded with a base material for use in the coupling of aniline and nitrobenzene Dec. 17, 2002
6479704 Hydrogenation with monolith reactor under conditions of immiscible liquid phases Nov. 12, 2002
6455023 Metallic catalysts for non-neutral liquid media Sep. 24, 2002
6414192 Process for preparing 4-aminodiphenylamine Jul. 2, 2002
6395933 Process for preparing 4-aminodiphenylamine intermediates May. 28, 2002
6388136 Method of preparation of 4-aminodiphenylamine May. 14, 2002
6245943 Method of preparing p-phenylenediamine Jun. 12, 2001
6242649 Continuous method for producing aromatic amines Jun. 5, 2001
6204413 Process for the preparation of salts of 1-substituted 2,4-diaminobenzenes Mar. 20, 2001
6179996 Selective purge for hydrogenation reactor recycle loop Jan. 30, 2001
6156933 Supercritical hydrogenation Dec. 5, 2000
6057479 Process for preparing indan derivatives May. 2, 2000
6049008 Shaped hydrogenation catalyst and processes for their preparation and use Apr. 11, 2000
6040481 Method for hydrogenating aromatic nitro compounds Mar. 21, 2000
6034276 Process for preparing 1-chloro-2,4-diaminobenzene Mar. 7, 2000
6005143 Use of a monolith catalyst for the hydrogenation of dinitrotoluene to toluenediamine Dec. 21, 1999
5980584 Substituted p-aminophenol, process of preparation and use in dyeing hair Nov. 9, 1999
5977411 Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent Nov. 2, 1999
5877350 Process for the production of aromatic amines Mar. 2, 1999
5808157 Process for producing aromatic amines Sep. 15, 1998
5744643 Process for preparing aromatic amines Apr. 28, 1998
5739403 Process for the production of optionally substituted 4-aminodiphenylamines Apr. 14, 1998
5728880 Process for the separation of high-boiling materials from the reaction mixture generated during the production of diaminotoluene Mar. 17, 1998
5712414 Hydroxycarboxylic acid anilides Jan. 27, 1998
5693862 Process for transport of toluenediamine Dec. 2, 1997
5689005 Reductive deoxygenation using a redox catalyst Nov. 18, 1997

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