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：DE2334379A1

公开(公告)日：1975-01-30

申请号：DE2334379

申请日：1973-07-06

Applicant: BASF AG

Inventor： HETZEL ECKHARD DIPL ING ,  VOGEL LUDWIG ,  ROTERMUND GERHARD W DR ,  HORN HANS CHRISTOPH DIPL ING D

IPC: C07D209/48

公开(公告)号：DE2542925A1

公开(公告)日：1977-04-21

申请号：DE2542925

申请日：1975-09-26

Applicant: BASF AG

Inventor： WEITZ HANS-MARTIN DR ,  VOGEL LUDWIG DIPL ING ,  HARTIG JUERGEN DR ,  HETZEL ECKHARD DIPL ING

IPC: C07C69/16 ,  B01J23/00 ,  B01J23/18 ,  B01J23/42 ,  B01J23/44 ,  B01J27/00 ,  B01J27/02 ,  B01J27/08 ,  B01J27/24 ,  B01J31/00 ,  B01J31/04 ,  C07B61/00 ,  C07C20060101 ,  C07C67/05 ,  C07C67/055

公开(公告)号：DE2915830A1

公开(公告)日：1980-10-23

申请号：DE2915830

申请日：1979-04-19

Applicant: BASF AG

Inventor： KOEHLER WALDEMAR DIPL CHEM DR ,  BLUMENBERG BERND DIPL CHEM DR ,  VOGEL LUDWIG DIPL ING ,  HETZEL ECKHARD DIPL ING

IPC: C07C265/14 ,  B01D1/14 ,  B01D1/18 ,  B01D3/34 ,  B01J8/24 ,  C07C67/00 ,  C07C241/00 ,  C07C263/20 ,  C07C265/12 ,  C07C119/048 ,  C07C118/00

Abstract: A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140 DEG C. to 280 DEG C.

公开(公告)号：DE2829739A1

公开(公告)日：1980-01-24

申请号：DE2829739

申请日：1978-07-06

Applicant: BASF AG

Inventor： OSTERTAG WERNER DIPL CHEM DR ,  ERTL GERT DIPL CHEM DR ,  BITTLER KNUT DIPL CHEM DR ,  HETZEL ECKHARD DIPL ING ,  SALADIN GUENTER DIPL ING ,  APPL MAX DIPL CHEM DR ,  VOELKL ERFRIED DIPL CHEM DR ,  PFORR GERHARD DIPL PHYS DR ,  WUNSCH GERD DIPL CHEM DR

IPC: C01F7/60

公开(公告)号：DE2716032A1

公开(公告)日：1978-10-26

申请号：DE2716032

申请日：1977-04-09

Applicant: BASF AG

Inventor： OSTERTAG WERNDER DR ,  WUNSCH GERD DR ,  KIENER VOLKER DR ,  HETZEL ECKHARD DIPL ING ,  SCHREINER SIEGFRIED DR ,  LEUTNER BERND DR ,  SCHLIMPER HANS-ULRICH DR ,  VOELKL ERFRIED DR

IPC: C01B17/66 ,  C07C51/00 ,  C07C53/06 ,  C07C67/00

Abstract: In a process for the manufacture of sodium dithionite by reacting sulfur dioxide with sodium formate and aqueous sodium hydroxide solution in the presence of methanol, an aqueous methanolic solution of sodium formate is first produced by reacting carbon monoxide with sodium hydroxide solution in an aqueous medium, containing from 1 to 50% by weight of methanol, based on the amount of water, at from 80 to 120 DEG C. under a pressure of from 10 to 40 bars. The resulting aqueous methanolic solution can be reacted directly, in the conventional manner, with sulfur dioxide and aqueous sodium hydroxide solution to give sodium dithionite.

公开(公告)号：DE3021111A1

公开(公告)日：1981-12-17

申请号：DE3021111

申请日：1980-06-04

Applicant: BASF AG

Inventor： SIEGLE HANS JOERG DIPL ING DR ,  REICH HANS HEINER DIPL CHEM DR ,  AUTZEN HORST DIPL CHEM DR ,  STECK WERNER DIPL CHEM DR ,  LOESER WERNER DIPL ING DR ,  HETZEL ECKHARD DIPL ING ,  OHLINGER MANFRED DIPL CHEM DR

IPC: B01J8/38 ,  B22F9/22 ,  F27B15/02 ,  H01F1/06 ,  F27B15/08

Abstract: A process for the preparation of acicular ferromagnetic metal particles, consisting essentially of iron, by reducing acicular iron oxides and/or iron oxide hydroxides, which are either pure or are modified with conventional foreign metal ions, by means of a gaseous reducing agent in a fluidized bed furnace in which a stirrer is provided immediately above the fluidizing grid.

公开(公告)号：DE2902978A1

公开(公告)日：1980-08-07

申请号：DE2902978

申请日：1979-01-26

Applicant: BASF AG

Inventor： KILPPER GERHARD DR ,  GRIMMER JOHANNES ,  TONNE PETER DR ,  HORN HANS-CHRISTOPH DR ,  HETZEL ECKHARD DIPL ING

IPC: C07D265/26

公开(公告)号：DE2452805A1

公开(公告)日：1976-05-20

申请号：DE2452805

申请日：1974-11-07

Applicant: BASF AG

Inventor： HETZEL ECKHARD DIPL ING ,  KOEHLER WALDEMAR DIPL CHEM DR ,  VOCK GEORG FRIEDRICH DIPL ING ,  BITTLER ROLF DIPL CHEM DR

IPC: B01D1/00 ,  C07C20060101 ,  C07C263/10 ,  C07C265/12 ,  C07C119/048

Abstract: A process for the separation of residues of toluenediisocyanate production from mixtures containing high boiling residues, toluenediisocyanate and solvent by evaporation in said residue at a minimum of 5 DEG C above the boiling point of the higher boiling of the components consisting of toluenediisocyanate and solvent. The mixture is fed into the central portion of an evaporator equipped with a helical agitator operative to provide a material flow moving centrally downwards and peripherally upwards.

公开(公告)号：DE2442886A1

公开(公告)日：1976-04-01

申请号：DE2442886

申请日：1974-09-07

Applicant: BASF AG

Inventor： HETZEL ECKHARD DIPL ING ,  WEITZ HANS-MARTIN DIPL CHEM DR ,  VOGEL LUDWIG ,  HARTIG JUERGEN DIPL CHEM DR

IPC: B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07D307/08

Abstract: Tetrahydrofuran is prepared from a compound containing butanediol or capable of generating butanediol. The butanediol-donating compound is an ester of butanediol which is reacted with hydrolysis and etherification by passing it downwardly through a distillation column together with an acid catalyst and passing steam upwardly therethrough. The product which distills off is tetrahydrofuran.