公开(公告)号：CA1001660A

公开(公告)日：1976-12-14

申请号：CA187724

申请日：1973-12-07

Applicant: HOECHST AG

Inventor： TOPP ALWIN ,  SCHAEFFER GEORG

IPC: C07C27/00 ,  C07C37/72 ,  C07C39/08 ,  C07C67/00

公开(公告)号：CA1086873A

公开(公告)日：1980-09-30

申请号：CA293122

申请日：1977-12-15

Applicant: HOECHST AG

Inventor： TOPP ALWIN ,  SCHMIEDEL KLAUS ,  SCHAEFFER GEORG

IPC: C02F1/74 ,  C01D5/00 ,  C01D5/04 ,  C02F11/08 ,  C02C5/04

Abstract: PROCESS FOR THE PURIFICATION OF WASTE WATER The waste water being formed upon the preparation of hydroxy aromatics, preferably of resorcinol and .beta.-naphthol, by caustic alkaline melt of the corresponding aryl-sulfonic acids or aryl sulfonates is purified by a wet oxidation with oxygen or oxygen-containing gases at temperatures of from about 100 to 370.degree.C and under a pressure of from about 1 to 300 bar. The CODdecomposition rates amount to about 90% and more. This process provides a sulfate, especially sodium sulfate, which is sufficiently pure for further use without complementary purification stages, if the hydroxy aromatics are prepared by means of a caustic soda melt. The obtention of the pure salt is important for the economy of the process.

公开(公告)号：CA1005827A

公开(公告)日：1977-02-22

申请号：CA149214

申请日：1972-08-11

Applicant: HOECHST AG

Inventor： BERTHOLD RUDIGER ,  TOPP ALWIN ,  SCHAEFFER GEORG

IPC: C07C215/76 ,  C07C67/00 ,  C07C209/00 ,  C07C209/18 ,  C07C211/46 ,  C07C213/02