公开(公告)号：DE1903197A1

公开(公告)日：1970-08-13

申请号：DE1903197

申请日：1969-01-23

Applicant: BASF AG

Inventor： GERLOFF DR ULLRICH ,  ZIPFEL JOSEF

IPC: C07C45/38 ,  C07C47/052

Abstract: By combined oxidation and dehydration of CH3OH using air in the presence of steam at 550-750 degrees C and silver crystalline catalyst, the mole proportion of CH3OH to air being 1:1.8 to 1:20, the characterising features being (1) carrying out the oxidation in the presence of 0.2 to 1.0 mole. H2O and (2) using 1.0-1.65 mol. of inert gas per mol.

公开(公告)号：DE2022818A1

公开(公告)日：1971-11-25

申请号：DE2022818

申请日：1970-05-11

Applicant: BASF AG

Inventor： SPERBER HEINRICH DR ,  ZIPFEL JOSEF

IPC: C07C45/38 ,  C07C

公开(公告)号：CA887244A

公开(公告)日：1971-11-30

申请号：CA887244D

Applicant: BASF AG

Inventor： SPERBER HEINRICH ,  ZIPFEL JOSEF ,  HAAS HANS

公开(公告)号：DE1768982A1

公开(公告)日：1972-01-13

申请号：DE1768982

申请日：1968-07-19

Applicant: BASF AG

Inventor： SPERBER HEINRICH DR ,  ZIPFEL JOSEF ,  HAAS HANS DR

IPC: C07C47/058 ,  C07C45/00 ,  C07C45/38 ,  C07C45/78 ,  C07C67/00 ,  C07C47/04

Abstract: 1,235,138. Formaldehyde. BADISCHE ANILIN- & SODA-FABRIK A.G. 1 Nov., 1968 [4 Nov., 1967; 2 Dec., 1967; 19 July, 1968], No. 51928/68. Heading C2C. Formaldehyde solutions are prepared by reaction of methanol in the gas phase with O 2 or a gas containing free O 2 with or without steam at 600-800‹ C. in contact with a silver catalyst followed by multistage absorption of the formaldehyde from the resultant gas, the gas passing through at least three absorption stages at 60-90‹ C. under acid conditions, the first to penultimate stages containing an aqueous ureaformaldehyde precondensate solution having a molar ratio of formaldehyde to urea of from 1.8:1 to 2.8:1 and the final stage containing an aqueous urea solution, the residence time in said final stage being not more than one hour. Aqueous methanol recovered from the gas leaving the final absorption stage is preferably recycled for oxidation, and the mixture of recovered aqueous methanol and fresh methanol is treated with an alkaline agent to a pH of at least 9 before oxidation. The aqueous formaldehyde-urea precondensate solution may be obtained by mixing liquids from the final and first absorption stages and condensing under acid conditions.

公开(公告)号：DE1961363A1

公开(公告)日：1971-06-16

申请号：DE1961363

申请日：1969-12-06

Applicant: BASF AG

Inventor： HAAS HANS DR ,  HUSSY OSKAR DIPL-ING ,  SCHREIBER HANS DIPL-ING ,  SPERBER HEINRICH DR ,  ZIPFEL JOSEF

IPC: B01J8/02 ,  C07C45/38 ,  B01J

Abstract: Cooler for reactor as in BE 729336 has finned tubes in parallel arrangement through which coolant is passed, and which serve as support for metal catalyst support. Pref. several rows of tubes are used, the top one being of finned tubes, and other rows being of smooth tubes of dia. >=20% less.