公开(公告)号：DE1670126A1

公开(公告)日：1970-10-29

申请号：DE1670126

申请日：1966-08-09

Applicant: BASF AG

Inventor： GUENTER HAMPRECHT DR ,  RUDOLF MOHR DR ,  DIETER FROMM DR HERMANN ,  MATTHIAS SCHWARZMANN DR ,  LUDWIG VOGEL DIPL-ING

IPC: H04L25/03 ,  C07D55/28

Abstract: 1,187,808. Cooling-off gas obtained in the synthesis of melamine. BADISCHE ANILIN- & SODA-FABRIK A.G. 8 Aug., 1967 [9 Aug., 1966], No. 36329/67. Heading C2C. The off-gas, obtained by the thermal decomposition of urea to form melamine and separation of the melamine from the off-gas by cooling the latter to 180-280‹ C., is further cooled by treatment with a melt containing urea and an ammonium salt and/or a guanidine salt which is soluble in molten urea and keeping the temperature of the melt up to 40‹ C. above the decomposition temperature of ammonium carbamate. The off-gas is preferably cooled to a temperature below 120‹ C. and, before treatment with the above melt containing the ammonia and/or guanidine salt, the off-gas may be washed in conventional manner with a melt of urea. Suitable salts which may be employed are the ammonium and guanidine salts of nitric acid, thiocyanic acid, formic acid and acetic acid and the melt advantageously contains urea in an amount of 10-90% by wt.

公开(公告)号：DE1912405A1

公开(公告)日：1970-10-01

申请号：DE1912405

申请日：1969-03-12

Applicant: BASF AG

Inventor： DIETHARD FRANCKE DIPL-ING ,  DIETMAR WERNER DR ,  LUDWIG VOGEL DIPL-ING ,  GERD WUNSCH DR

IPC: C07C29/09 ,  C07C33/02 ,  C07C33/025 ,  C07C403/00

Abstract: The alcohols are of the general formula R1R2R3C(OH), where R1 and R2 are the same or different and may be aliphatic, cycloaliphatic, araliphatic or aromatic gps. Also R2 may be H or the two R2 gps. and their neighbouring C-atom may be part of a ring or the two R2 gps. may together represent the gp. R3R3C=. The R3 gps. may be the same or different; They may be H-atoms, aliphatic, araliphatic or aromatic gps. The process involves the decomposition of the addition cpds. R1R2R3(OMgX) formed from the reaction of a carbonyl and a Grignard cpd. in ether with water or an aqueous mixture. X= halogen. The water is saturated with the ether used to dissolve the grignard cpd. The organic phase of the 2-phase mixture which forms during decomposition is heated to between 25 and 140 degrees C. Advantages lie in the process simplicity, economy, good yields and continuous operation.

公开(公告)号：DE1443435A1

公开(公告)日：1969-03-13

申请号：DE1443435

申请日：1962-04-26

Applicant: BASF AG

Inventor： ERNST BARTHOLOME DR ,  HANS NIENBURG DR ,  WALTER SCHENCK DR ,  KARL SCHERF DR ,  NORBERT LOESCH DR ,  ALBRECHT WALLIS DR ,  LUDWIG VOGEL DIPL-ING

IPC: B01J14/00 ,  B01J19/00 ,  B01J19/24 ,  C07C51/275 ,  C07C205/57 ,  C07D213/79 ,  C07D213/803 ,  C07D215/48 ,  C07D215/50

公开(公告)号：DE1670216A1

公开(公告)日：1971-01-21

申请号：DE1670216

申请日：1967-04-26

Applicant: BASF AG

Inventor： DIETER FROMM DR ,  MATTHIAS SCHWARZMANN DR ,  LUDWIG VOGEL DIPL-ING ,  ALFRED WIDMANN DIPL-ING DR

IPC: C07D251/60 ,  C07D

公开(公告)号：DE1418645A1

公开(公告)日：1969-02-06

申请号：DE1418645

申请日：1960-12-09

Applicant: BASF AG

Inventor： LUDWIG VOGEL DIPL-ING ,  ADOLF KREYER DR ,  ERHARD BORCHERS DR ,  KARL SCHMEIDL DR

IPC: C07C51/42

公开(公告)号：DE1495159A1

公开(公告)日：1968-12-12

申请号：DE1495159

申请日：1961-12-21

Applicant: BASF AG

Inventor： MICHAEL JAHRSTORFER DR ,  KARL SCHMEIDL DR ,  LUDWIG VOGEL DIPL-ING

IPC: C08F8/06