公开(公告)号：JPH11319800A

公开(公告)日：1999-11-24

申请号：JP9894699

申请日：1999-04-06

Applicant: BASF AG

Inventor： PAPKALLA THOMAS ,  BAUR KARL GERHARD DR ,  LANGENSIEPEN HANS-WERNER DR ,  MACKENROTH WOLFGANG

IPC: A62D3/40 ,  A62D101/26 ,  A62D101/28 ,  C02F1/02 ,  C02F1/58

Abstract: PROBLEM TO BE SOLVED: To decompose different aromatic nitro compounds in waste water as many as possible in a single process when decomposing nitro compounds in the waste water and a mixture of more than two these compounds, by using at least one aromatic nitro compound not having a hydroxyl group in its aromatic ring. SOLUTION: Waste water is thermally decomposed in a pressure vessel under such a condition that temperature is 150-350 deg.C, favorably 250-320 deg.C, pressure is 10-300 bars, favorably 40-250 bars, and the pH of the waste water is 7-14, favorably 10-13. The temperature of the waste water is adjusted so that nitroaromatic compounds with low solubility do not form an organic phase. The amount of the nitro compound with low solubility in water is adjusted according to the temperature of the waste water preferably of 40-80 deg.C. Thereby, the aromatic nitro compounds having no hydroxyl group and the nitro hydroxy aromatic compounds in the waste water can be decomposed at the same time in a single process.

公开(公告)号：DE59704395D1

公开(公告)日：2001-09-27

申请号：DE59704395

申请日：1997-10-08

Applicant: BASF AG

Inventor： EIERMANN MATTHIAS ,  PAPKALLA THOMAS

IPC: C07C309/04 ,  C07C303/14

Abstract: A process for preparing methanesulfonic acid by irradiating a mixture comprising acetic acid, sulfur dioxide and oxygen with light, wherein the reaction mixture is irradiated with an average cumulative irradiance in the range from 240 to 320 mm of from 0.05 to 50 mmol quanta/cm2h at the light entry area.

公开(公告)号：CA2164448A1

公开(公告)日：1996-06-08

申请号：CA2164448

申请日：1995-12-05

Applicant: BAUR KARL GERHARD ,  PAPKALLA THOMAS ,  BASF AG

Inventor： BAUR KARL GERHARD ,  PAPKALLA THOMAS

IPC: C02F1/58 ,  C02F1/72

Abstract: Wastewaters containing organic halogen compounds are oxidized by reacting the wastewaters with nitric acid at from 100 to 350.degree.C under from 5 to 190 bar.

公开(公告)号：DE19815844A1

公开(公告)日：1999-10-14

申请号：DE19815844

申请日：1998-04-08

Applicant: BASF AG

Inventor： PAPKALLA THOMAS ,  BAUR KARL GERHARD ,  LANGENSIEPEN HANS-WERNER ,  MACKENROTH WOLFGANG

IPC: A62D3/40 ,  A62D101/26 ,  A62D101/28 ,  C02F1/02 ,  C02F1/58 ,  C02F1/04 ,  C07B61/00 ,  C07B63/00 ,  A62D3/00

Abstract: In the decomposition of aromatic nitro compound(s) (I) in waste liquor with pH 7-14 by heating to 150-350 deg C and 10-300 bar, at least one of (I) has no hydroxyl (OH) group on the aromatic ring.