公开(公告)号：DE3742265A1

公开(公告)日：1989-06-22

申请号：DE3742265

申请日：1987-12-12

Applicant: BASF AG

Inventor： HOHMANN ANDREAS DR ,  REUTHER WOLFGANG DR ,  FIKENTSCHER ROLF DR ,  PROLL THEO DR

IPC: C07D277/04 ,  C07C319/02 ,  C07C319/06 ,  C07C323/25 ,  C07C323/58 ,  C07D277/60

Abstract: The cysteamine acid addition salts are prepared by reaction of aziridine with an organic sulphur compound of oxidation state -2 and with a ketone, followed by acid hydrolysis of the thiazolidine formed as intermediate, the aziridine and the ketone being reacted with ammonium hydrogen sulphide or a metal hydrogen sulphide with the addition of a medium to strong acid at a temperature of -10 to +100 DEG C and a pH of greater than or equal to 8.5 being maintained.

公开(公告)号：DE3429611A1

公开(公告)日：1986-02-20

申请号：DE3429611

申请日：1984-08-11

Applicant: BASF AG

Inventor： HAAS KLAUS ,  KLAHR ERHARD DR ,  PROLL THEO DR ,  WELZEL GERHARD DR ,  TENSI HANS M PROF DR

IPC: C21D1/60

Abstract: An aqueous quenching medium for hardening metals by heat treatment contains a solution of 0.1 to 30% by weight of a polyether compound having a molecular weight of more than 5000 and additionally 0.1 to 30% by weight of an at least partially hydrolysed alkali metal metaphosphate and/or of an oligomeric alkali metal phosphate. Only a very labile vapour skin phase or virtually none at all forms in these quenching media when heated metals are cooled.