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：DE2723156A1

公开(公告)日：1978-12-07

申请号：DE2723156

申请日：1977-05-23

Applicant: BASF AG

Inventor： OSTERTAG WERNER DR ,  WUNSCH GERD DR ,  KIENER VOLKER DR ,  ERTL GERT DR ,  HETZEL ECKHARD DIPL ING ,  SCHREINER SIEGFRIED DR ,  VOELKL ERFRIED DR ,  KOESTER HARTWIG DR

IPC: C01B17/66

Abstract: Prodn. of anhydrous Na dithionite (I) by reacting SO2 with Na formate and NaOH in aq. -alcoholic medium, is now carried out in presence of alkali and/or ammonium salts of oxalic acid and/or EDTA. Pref. the concn. of chelating agent at the end of reaction is not below 0.001 g./l. Decomposition of (I) induced by metal ions (esp. Fe, Cr and Ni, introduced with the reactants or generated by corrosion of the reactor) is inhibited by the chelating agents.

公开(公告)号：DE2442418A1

公开(公告)日：1976-03-18

申请号：DE2442418

申请日：1974-09-05

Applicant: BASF AG

Inventor： VOELKL ERFRIED DR ,  SCHREINER SIEGFRIED DR ,  WUNSCH GERD DR ,  KIENER VOLKER DR ,  KOESTER HARTWIG DR ,  WAIBEL RUDI DIPL ING DR

IPC: C01B31/26 ,  C01B17/66