公开(公告)号：DE3160439D1

公开(公告)日：1983-07-21

申请号：DE3160439

申请日：1981-07-09

Applicant: BASF AG

Inventor： KASSAT HARRY ,  WIRTH FRIEDRICH DR ,  WAGNER JOACHIM

IPC: B01D7/00 ,  B01D7/02 ,  F28F9/00 ,  F28F9/013

Abstract: Desublimator for isolating sublimation products from reaction gases, which consists of a closed housing and a plurality of rows of finned tubes accommodated horizontally and superposedly therein, successive superposed finned tubes being supported, and mutually spaced, with limited adjustability, by means of cage-like perforated sliding shoes surrounding them in a box-like manner, the sliding shoes of the individual finned tubes being directly stacked one above the other and resting loosely on common supporting girders anchored to the housing, and the supporting girders having, in cross-section, the outline of a triangle with its apex pointing downward.

公开(公告)号：DE3060094D1

公开(公告)日：1982-01-28

申请号：DE3060094

申请日：1980-04-03

Applicant: BASF AG

Inventor： REUTER PETER DR ,  BLECHSCHMITT KURT ,  WIRTH FRIEDRICH DR

IPC: C07D307/89 ,  B01J21/06 ,  B01J23/22 ,  B01J35/02 ,  B01J35/04 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31

公开(公告)号：DE2510994A1

公开(公告)日：1976-09-23

申请号：DE2510994

申请日：1975-03-13

Applicant: BASF AG

Inventor： BLECHSCHMITT KURT ,  REUTER PETER DR ,  WIRTH FRIEDRICH DR ,  BUERGER GERT DR ,  SEUBERT ROLF DR

IPC: C07D307/89 ,  B01J23/22 ,  B01J35/02 ,  B01J35/04 ,  B01J37/02 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31

Abstract: A supported catalyst containing vanadium and titanium, comprising a ring-shaped carrier having an external diameter of from 7.3 to 8.6 mm, a length of from 5.3 to 7 mm and a wall thickness of from 0.1 to 2 mm, and an active composition, applied thereto, of from 1 to 30 per cent by weight of vanadium pentoxide and from 70 to 99 per cent by weight of titanium dioxide and/or zirconium dioxide.

公开(公告)号：DE1618136A1

公开(公告)日：1971-03-11

申请号：DEB0092089

申请日：1967-04-15

Applicant: BASF AG

Inventor： WIRTH FRIEDRICH DR ,  SUTER HUBERT DR ,  MANN WALTER DIPL-ING ,  SCHAEFER GERHARD DIPL-ING

IPC: C07C51/573 ,  B01D3/00

Abstract: 1,180,117. Distillation columns; purification of phthalic anhydride. BADISCHE ANILIN-& SODA-FABRIK A.G. 19 May, 1967 [21 May, 1966; 15 April, 1967], No. 23398/67. Heading BIB. [Also in Division. C2] Phthalic anhydride is purified by distillation in a plant comprising two fractionating columns 1, 5 of the tray-type connected as shown to two evaporators 2, 8 each containing a vertically-disposed bundle of tubes, the arrangement being such that the distilland flows down as a thin film on the inside of the tubes. The material to be purified is introduced about half-way up column 1, which is maintained under reduced pressure. Vapours comprising about 37% of the feed, including all the low-boiling impurities, leave the head of column 1, and are condensed; and part of the condensate is refluxed to the column. Highboiling impurities are withdrawn from the system through line 9. Purified phthalic anhydride is obtained at the head of column 5.