公开(公告)号：US3567749A

公开(公告)日：1971-03-02

申请号：US3567749D

申请日：1966-08-08

Applicant: DEGUSSA

Inventor： NEUGEBAUER WALTER ,  SCHMIDT LOTHAR ,  SPERKA GERHARD

IPC: C07C67/22 ,  C07C69/34 ,  C07C69/38 ,  C07C69/54 ,  C07C69/76 ,  C07C69/78 ,  C07C67/00

CPC classification number: C07C69/76 ,  C07C67/22 ,  C07C69/34 ,  C07C69/38 ,  C07C69/54 ,  C07C69/78 ,  C07C69/44 ,  C07C69/14 ,  C07C69/675

Abstract: CARBOXYLIC ACID ESTERS ARE PREPARED BY REACTING CARBOXYLIC ACID NITRILES WITH ALCOHOLS IN THE PRESENCE OF WATER IN ACID MELT AT A TEMPERATURE BETWEEN 90 AND 300* C., THE CARBOXYLIC ACID ESTER AND ANY UNCONVERTED NITRILE AND ALCOHOL FROM THE MELT AND HEATING THE MELT TO A TEMPERATURE BETWEEN ABOUT 300 AND 500*C. TO DRIVE OFF AMMONIA TAKEN UP BY THE ACID SALT.

公开(公告)号：FR2463411A1

公开(公告)日：1981-02-20

申请号：FR8016051

申请日：1980-07-21

Applicant: DEGUSSA

Inventor： VOIGT CARL ,  SCHMIDT LOTHAR ,  KEEINSCHMIT PETER

IPC: G01N31/00 ,  G01N31/10

Abstract: Hydrogen cyanide in hydrogen cyanide containing gas is transformed into ammonia by a special iridium catalyst in the presence of at least the equivalent amount of hydrogen for the change. The ammonia is analyzed to provide a measure of the hydrogen cyanide in the hydrogen cyanide containing gas.

公开(公告)号：CA756021A

公开(公告)日：1967-04-04

申请号：CA756021D

Applicant: DEGUSSA

Inventor： NEUGEBAUER WALTER ,  SCHMIDT LOTHAR

公开(公告)号：CA806590A

公开(公告)日：1969-02-18

申请号：CA806590D

Applicant: DEGUSSA

Inventor： NEUGEBAUER WALTER ,  SCHMIDT LOTHAR

公开(公告)号：GB1129354A

公开(公告)日：1968-10-02

申请号：GB3888566

申请日：1966-08-31

Applicant: DEGUSSA

Inventor： NEUGEBAUER WALTER ,  SCHMIDT LOTHAR

IPC: C01B3/02 ,  C01C1/00 ,  C01C1/12 ,  C07C253/34 ,  C07C255/49

Abstract: 1,129,354. Ammonia. DEUTSCHE GOLD UND SILBER SCHEIDEANSTALT. 31 Aug., 1966 [2 Sept., 1965], No. 38885/66. Heading C1A. [Also in Division C2] Ammonia is separated from a gas mixture comprising a nitrile, ammonia and, optionally, water, by contacting the gas mixture with an acidic salt melt at a temperature of 90-300‹ C. for a period short enough to avoid substantial hydrolysis of the nitrile. Preferred acidic salt melts are the alkali-metal and/or ammonium acid salts of sulphuric and/or phosphoric acid and the melt is preferably passed countercurrent to the gas mixture, employing residence times of up to 100 sees. The ammonia may be desorbed from the melt by subsequently heating the melt at 300-500‹ C., preferably in the presence of an inert gas, in such a way that the gas mixture formed is suitable for nitrile synthesis, and neutral salts, e.g. the sulphates and/or phosphates of the alkali-metals, may be added to the melt in the desorption step. The melt is preferably stripped with an inert gas, e.g. air or steam, before passage to the ammonia desorption step and the whole process may be effected continuously. Specified nitriles purified are acrylonitrile, acetonitrile, benzonitrile and cyclopropyl cyanide.

公开(公告)号：CA766777A

公开(公告)日：1967-09-05

申请号：CA766777D

Applicant: DEGUSSA

Inventor： SCHMIDT LOTHAR ,  SPERKA GERHARD ,  NEUGEBAUER WALTER

公开(公告)号：CA701001A

公开(公告)日：1964-12-29

申请号：CA701001D

Applicant: DEGUSSA

Inventor： SCHMIDT LOTHAR ,  NEUGEBAUER WALTER