Amino naphthalene sulphonic acids prepn. from corresp. nitro cpds. - using mostly used Raney nickel under specified conditions

• Main Authors: STEFFAN,GUIDO,.DR, KAISER,REINHARD,.DR, BARTH,OTTO, BEHRE,HORST,.DR, ZANDER,JUERGEN,.DR, BECKER,HANS-JOACHIM,.DR
• Format: Patent
• Language: English; German
• Published: 26.04.1979
• Edition: 2
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A process for prepg. aminonaphthalene sulphonic acids by catalytic hydrogenation of the salts of nitronaphtalene sulphonic acids comprises the following. A mixture of used Raney nickel catalyst and fresh Raney nickel catalyst is suspended in water and/or an aq. soln. of the hydrogenation product. Th...