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Class Information
Number: 568/932
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Nitro containing (including aci forms) > Benzene ring containing > Polynitro
Description: Compounds which contain at least two -NO2










Sub-classes under this class:

Class Number Class Name Patents
568/933 Halogen containing 51
568/934 Single methyl and plural nitros only bonded directly to benzene ring (e.g., dinitrotoluene, etc.) 79


Patents under this class:
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Patent Number Title Of Patent Date Issued
8445734 Photolabile protective groups for improved processes to prepare oligonucleotide arrays May. 21, 2013
7767868 Process for preparing high purity TNT Aug. 3, 2010
7449610 Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract Nov. 11, 2008
6984762 Process for the two-step production of dinitrotoluene Jan. 10, 2006
6815567 Derivatives of 4-sulfanylalkyl-3,5-dinitrobenzyl alcohol and method for preparing the same Nov. 9, 2004
6696613 Process for preparing diketone compounds and precursors thereto Feb. 24, 2004
6506949 Process for ring nitrating aromatic compounds in a tubular reactor having static mixing elements separated by coalescing zones Jan. 14, 2003
6486346 Process for the preparation of durene diisocyanate Nov. 26, 2002
6291726 Process for nitration of aromatic compounds using a non-acid type nitration process Sep. 18, 2001
6288289 Integrated effluent treatment process for nitroaromatic manufacture Sep. 11, 2001
6284894 Preparation of allylic aromatic compounds Sep. 4, 2001
6258986 Process for the production of dinitrotoluene Jul. 10, 2001
6191325 Recovering/recycling nitric acid from dinitration process streams comprising HNO3/dinitro compounds Feb. 20, 2001
6069277 Amination of electrophilic aromatic compounds by vicarious nucleophilic substitution May. 30, 2000
5963878 Nitration process Oct. 5, 1999
5948944 Two-stage dinitrotoluene production process Sep. 7, 1999
5902910 Weak acid process for producing dinitrotoluene May. 11, 1999
5874654 Purification of mixtures of nitroaromatic compounds by removing nitrocresols therefrom Feb. 23, 1999
5847240 Process for reducing tetranitromethane in compositions containing nitroaromatic compounds Dec. 8, 1998
5820764 Treatment/removal of byproduct aqueous effluents comprising hydroxynitro-aromatic compounds Oct. 13, 1998
5756867 Recovery of nitric acid from nitration processes May. 26, 1998
5728901 Nitration process which employs water tolerant Lewis acid catalysts Mar. 17, 1998
5696305 Process for the production of nitroaromatic compounds Dec. 9, 1997
5689018 Process for the production of dinitrotoluene Nov. 18, 1997
5679873 Process for the production of dinitrotoluene Oct. 21, 1997
5663462 Process for the production of dinitrotoluene and isomeric mixtures of dinitrotoluene Sep. 2, 1997
5633406 Vicarious nucleophilic substitution using 4-amino-1,2,4-triazole, hydroxylamine or O-alkylhydroxylamine to prepare 1,3-diamino-2,4,6-trinitrobenzene or 1,3,5-triamino-2,4,6-trinitrobenzene May. 27, 1997
5616818 Process for the polynitration of aromatic compounds Apr. 1, 1997
5600035 Positive photoactive compounds based on 2,6-dinitro benzyl groups and 2,5-dinitro benzyl groups Feb. 4, 1997
5554299 Treatment/removal of byproduct aqueous effluents comprising hydroxynitroaromatic compounds Sep. 10, 1996
5488187 Process for the production of dinitrobenzene and mononitrobenzene Jan. 30, 1996
5395995 Process for the preparation and purification of nitroaromatics Mar. 7, 1995
5367108 Process for the preparation of dinitro-polyalkylbenzenes Nov. 22, 1994
5334781 Process for the preparation of nitrobenzene Aug. 2, 1994
5329054 Decarboxylation process Jul. 12, 1994
5324872 Process for the preparation of nitrobenzene Jun. 28, 1994
5315043 Aromatic nucleophilic fluorination May. 24, 1994
5313009 Nitration process May. 17, 1994
5221440 Process for destruction of nitro-hydroxy-aromatic compounds in aqueous media Jun. 22, 1993
5210339 Process for nitrating benzocyclobutene compounds May. 11, 1993
5194659 High melting amino aromatic nitrate esters Mar. 16, 1993
5185454 Process for the preparation of symmetrical diarylacetylenes Feb. 9, 1993
5099079 Process for separating acid from nitro substituted aromatics using a molten nitrate salt Mar. 24, 1992
5072061 1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene and preparation method thereof Dec. 10, 1991
5072053 1,3-di-arylmethoxy-4,6-dinitro-benzenes, process for their preparation and process for the preparation of 4,6-diaminoresorcinol Dec. 10, 1991
5012019 Process for purifying aromatic nitration products Apr. 30, 1991
5006325 Process for the recovery of nitric acid Apr. 9, 1991
5001272 Process for the production of dinitrotoluene Mar. 19, 1991
5001286 Process for separating sulphuric acid and nitric acid from dinitrotoluene mixtures obtained during the nitration of toluene Mar. 19, 1991
4990699 Perfluoroalkylation process Feb. 5, 1991

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