公开(公告)号：DE3744387A1

公开(公告)日：1989-07-13

申请号：DE3744387

申请日：1987-12-29

Applicant: BASF AG

Inventor： BRUNNER ERWIN DR ,  EBENHOECH FRANZ LUDWIG DR ,  GOESELE WILHELM DR ,  MEYER HERMANN DR

IPC: C01B35/06

Abstract: To prepare boron trifluoride, calcium fluoride is reacted with oleum and boron compounds. The reaction is carried out in two stages, with a) in a first stage, reacting calcium fluoride with oleum and b) in a second stage, reacting the reaction mixture from the first stage with a boron compound of the general formula B2O3.yX2O, in which y is 0, 0.5, 1 or 3 and X is hydrogen or an alkaline metal. The amount of oleum to be introduced to the first stage is calculated in such a way that 1 mol of free SO3 is added per mol of calcium fluoride and one further mol of SO3 + 10% is added for each mol of X2O of the boron compound.

公开(公告)号：DE3940347C2

公开(公告)日：1997-02-20

申请号：DE3940347

申请日：1989-12-06

Applicant: BASF AG

Inventor： EBENHOECH FRANZ LUDWIG DR ,  SCHLEGEL REINHOLD

IPC: B22F1/00 ,  B22F9/30

Abstract: Iron whiskers are produced by thermal decomposition of iron pentacarbonyl vapor in an indirectly heated empty-space decomposer in which the cross-sectional area for entry of the iron pentacarbonyl into the empty-space decomposer is from 10 to 40% of the cross-sectional area of the empty-space decomposer, the mass flow density of the iron pentacarbonyl vapor, based on the cross-sectional area of the decomposer, is from 0.01 to 0.07 kg per square meter per second, and the temperature in the empty-space decomposer should at no point be below 360 DEG C.

公开(公告)号：DE3700244C2

公开(公告)日：1996-04-18

申请号：DE3700244

申请日：1987-01-07

Applicant: BASF AG

Inventor： REICH HANS HEINER DR ,  LEUTNER BERND DR ,  EBENHOECH FRANZ LUDWIG DR ,  BRUNOLD ANDREAS

IPC: C01B33/107 ,  C01B35/06 ,  C01B33/08

公开(公告)号：DE3582605D1

公开(公告)日：1991-05-29

申请号：DE3582605

申请日：1985-02-22

Applicant: BASF AG

Inventor： STECK WERNER DR ,  JAKUSCH HELMUT DR ,  EBENHOECH FRANZ LUDWIG DR

IPC: C01G49/02 ,  C01G51/00 ,  C09C1/24 ,  G11B5/706

公开(公告)号：DE3700244A1

公开(公告)日：1988-07-21

申请号：DE3700244

申请日：1987-01-07

Applicant: BASF AG

Inventor： REICH HANS HEINER DR ,  LEUTNER BERND DR ,  EBENHOECH FRANZ LUDWIG DR ,  BRUNOLD ANDREAS

IPC: C01B33/107 ,  C01B35/06 ,  B01D53/14 ,  C01B33/08

Abstract: Silicon tetrafluoride is removed from gaseous boron trifluoride by treating the gas in a first stage at temperatures of from 10 to 60@C with a solution containing from 55 to 70% by weight of dissolved boron trifluoride. From this stage there is drawn off an exit gas which comprises practically pure silicon tetrafluoride and also a boron trifluoride-enriched solution from which boron trifluoride is desorbed at temperatures of from 90 to 200@C.

公开(公告)号：DE3407722A1

公开(公告)日：1985-09-05

申请号：DE3407722

申请日：1984-03-02

Applicant: BASF AG

Inventor： STECK WERNER DR ,  JAKUSCH HELMUT DR ,  EBENHOECH FRANZ LUDWIG DR

IPC: C01G49/02 ,  C01G51/00 ,  C09C1/24 ,  G11B5/706 ,  C01G49/00 ,  G11B5/62

公开(公告)号：AT252872B

公开(公告)日：1967-03-10

申请号：AT749265

申请日：1965-08-13

Applicant: BASF AG

Inventor： EBENHOECH FRANZ LUDWIG DR ,  SCHULZE GERHARD DR

IPC: B01J21/00 ,  B01J23/86 ,  C01B3/16

公开(公告)号：AT249003B

公开(公告)日：1966-08-25

申请号：AT528564

申请日：1964-06-19

Applicant: BASF AG

Inventor： MALLE KARL-GEERT DR ,  ZIRKER GUENTHER DR ,  SCHULZE GERHARD DR ,  EBENHOECH FRANZ LUDWIG DR

IPC: B01J23/72 ,  B01J23/76 ,  C01B3/16

公开(公告)号：DE3940347A1

公开(公告)日：1991-06-13

申请号：DE3940347

申请日：1989-12-06

Applicant: BASF AG

Inventor： EBENHOECH FRANZ LUDWIG DR ,  SCHLEGEL REINHOLD

IPC: B22F1/00 ,  B22F9/30

Abstract: Iron whiskers are produced by thermal decomposition of iron pentacarbonyl vapor in an indirectly heated empty-space decomposer in which the cross-sectional area for entry of the iron pentacarbonyl into the empty-space decomposer is from 10 to 40% of the cross-sectional area of the empty-space decomposer, the mass flow density of the iron pentacarbonyl vapor, based on the cross-sectional area of the decomposer, is from 0.01 to 0.07 kg per square meter per second, and the temperature in the empty-space decomposer should at no point be below 360 DEG C.

公开(公告)号：DE3819436A1

公开(公告)日：1989-12-14

申请号：DE3819436

申请日：1988-06-08

Applicant: BASF AG

Inventor： AMBACH EBERHARD DR ,  EBENHOECH FRANZ LUDWIG DR ,  GRUENDLER KARL-HEINZ DR ,  IRGANG MATTHIAS DR ,  ZIRKER GUENTER DR

IPC: B01J23/86 ,  B01J35/10 ,  C01B3/16 ,  C07C45/41

Abstract: The application relates to a process for the preparation of sulphur-free iron-oxide- and chromium-oxide-containing catalysts having BET surface areas of 20 to 100 m /g and in which more than 80% of the pore volume is in the pore radius range of 30 to 100 nm, an iron(III) oxide prepared from iron carbonyl having a mean grain size below 10 mu m and a BET surface area of greater than 50 m /g and chromium(III) oxide having a mean grain size below 40 mu m and a BET surface area of more than 30 m /g being mechanically mixed as powder or suspension and then tableted.