公开(公告)号：US3619132A

公开(公告)日：1971-11-09

申请号：US3619132D

申请日：1968-10-28

Applicant: DEGUSSA

Inventor： MANN HANS-JOACHIM ,  SIMON KLAUS ,  RICHTER ROBERT ,  BITTNER FRIEDRICH ,  BURKHARDT HEINRICH ,  GENSHEIMER JACOB

IPC: C01C3/10 ,  C01C3/08 ,  B01D9/00

CPC classification number: C01C3/10

Abstract: Alkali cyanides are prepared from carbon dioxide free impure hydrocyanic acid gases by reacting with aqueous alkali hydroxide, e.g. NaOH or KOH, in a first step at subatmospheric pressure to form the alkali cyanide and then the alkali cyanide is crystallized in a second step at a still lower pressure.

公开(公告)号：US3595926A

公开(公告)日：1971-07-27

申请号：US3595926D

申请日：1969-10-24

Applicant: DEGUSSA

Inventor： MANN HANS-JOACHIM ,  POHL WALTER ,  SIMON KLAUS ,  WEIGERT WOLFGANG

IPC: C08G2/08 ,  C07C47/10

CPC classification number: C08G2/08

Abstract: PROCESS FOR THE PRODUCTION OF A FREE FLOWING PARAFORMALDEHYDE PRODUCT WHICH COMPRISES SPRAYING A LIQUID FORMALDEHYDE CONCENTRATE CONTAINING 85 TO 90% BY WEIGHT OF FORMALDEHYDE IN THE FORM OF DROPLETS INTO THE UPPER PORTION OF A COOLING TOWER SUPPLYING A COOLING INERT GAS AT A TEMPERATURE WHICH IS BELOW +39*C., AND PREFERABLY BETWEEN -40 AND +30*C., TO THE COOLING TOWER AND PASSING IT UPWARDLY THERETHROUGH, PERMITTING THE DROPLETS TO SOLIDIFY AS THEY DROP THROUGH THE RISING GAS BEFORE THEY REACH THE BOTTOM OF THE TOWER AND WITHDRAWING THE SOLIDIFIED PARTICLES FROM THE BOTTOM OF THE TOWER. PREFERABLY A FLUIDIZED BED OF SOLIDIFIED PARAFORMALDEHYDE PARTICLES IS MAINTINED IN THE BOTTOM PORTION OF THE TOWER AND THE SOLIDIFIED PARTICLES ARE FURTHER COOLED AFTER REMOVAL FROM THE TOWER.

公开(公告)号：CA883371A

公开(公告)日：1971-10-12

申请号：CA883371D

Applicant: DEGUSSA

Inventor： WEIGERT WOLFGANG ,  MANN HANS-JOACHIM ,  POHL WALTER ,  SIMON KLAUS

公开(公告)号：CA892610A

公开(公告)日：1972-02-08

申请号：CA892610D

Applicant: DEGUSSA

Inventor： WEIGERT WOLFGANT ,  MANN HANS-JOACHIM ,  LUSSLING WERNER FLECKLAND THEO ,  DELLE HEINRICH

公开(公告)号：CA740903A

公开(公告)日：1966-08-16

申请号：CA740903D

Applicant: DEGUSSA

Inventor： MANN HANS-JOACHIM ,  SIMON KLAUS ,  POHL WALTER

公开(公告)号：CA735932A

公开(公告)日：1966-06-07

申请号：CA735932D

Applicant: DEGUSSA

Inventor： DELLE HEINRICH ,  MANN HANS-JOACHIM

公开(公告)号：CA735931A

公开(公告)日：1966-06-07

申请号：CA735931D

Applicant: DEGUSSA

Inventor： MANN HANS-JOACHIM ,  DELLE HEINRICH