公开(公告)号：DE4104420A1

公开(公告)日：1991-08-22

申请号：DE4104420

申请日：1991-02-14

Applicant: BASF AG

Inventor： KOESTER HARTWIG DR ,  HESSE DIETER ,  SCHWEITZER ARMIN DR

IPC: A62C99/00 ,  G01M3/02 ,  G01M3/20

Abstract: The monitoring system for ignitable gases and vapours, etc., contains pipe branches at defined intervals leading up to the monitored system. The pipe branches are connected via a collection system to detectors for the gases, vapours, etc. The openings of the pipe branches are protected against ingress of precipitation and/or fouling by covers. The system can be installed above or below ground. USE/ADVANTAGE - Large area detection system enables reliable, continuous and efficient monitoring e.g. in oil processing plant.

公开(公告)号：FI750372A

公开(公告)日：1975-08-16

申请号：FI750372

申请日：1975-02-12

Applicant: BASF AG

Inventor： RAUCH KONRAD ,  KIEFER HANS ,  HESSE DIETER ,  STROHMEYER MAX ,  HOHENSCHUTZ HEINZ

IPC: C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C67/00 ,  C07C

Abstract: Formic acid is isolated from mixtures containing formic acid, methyl formate, methanol and water by fractional distillation, the mixture being fed into the upper half of the distillation column and 5 to 15 theoretical plates being maintained above the feed point and 10 to 25 theoretical plates below the feed point. The formic acid is withdrawn at the bottom end of the column as an azeotrope with water, the azeotrope being in the liquid state or preferably in the vapor state.