公开(公告)号：DE3168363D1

公开(公告)日：1985-02-28

申请号：DE3168363

申请日：1981-10-13

Applicant: BASF AG

Inventor： STOCKBURGER DIETER DR ,  SCHULTZ WILHELM ,  SCHMIDT JOHANNES E DR ,  WIRTH FRIEDRICH DR ,  HOFFMANN HERWIG DR ,  HOLZKNECHT BERNHARD DR ,  WINTERMANTEL KLAUS DR

IPC: C07D307/89 ,  C07C51/265 ,  C07C51/31

公开(公告)号：CH618097A5

公开(公告)日：1980-07-15

申请号：CH184977

申请日：1977-02-15

Applicant: BASF AG

Inventor： WINTERMANTEL KLAUS DR ,  STOCKBURGER DIETER DR ,  FUCHS HUGO DR

IPC: B01D9/04 ,  B01D9/00 ,  B01D9/02 ,  C07C37/84 ,  C07C39/14 ,  C07C51/43

Abstract: A method of separation by fractional crystallization from a liquid mixture in which the liquid mixture is repeatedly passed in turbulent flow through an indirectly cooled crystallization zone, which must be kept full. The liquid remaining after deposition of a layer of crystals on the wall of the crystallization zone is removed, whereupon the surface of the layer of crystals is washed and the crystals are melted by passing a melt of similar compositions to that of the layer of crystals through the crystallization zone. During crystallization the melt is maintained at the temperature of crystallization and crystallization is stopped when the frozen fraction is from 70 to 98%.

公开(公告)号：DE2625075A1

公开(公告)日：1977-12-22

申请号：DE2625075

申请日：1976-06-04

Applicant: BASF AG

Inventor： HERBIG KLAUS DIPL CHEM DR ,  ROSKE ECKHARD ,  STOCKBURGER DIETER DR ,  BRUNOLD ANDREAS DIPL ING ,  DIETRICH HANS JUERGEN DIPL ING

IPC: C07C20060101 ,  C07C263/10 ,  C07C265/04 ,  C07C271/02 ,  C07C119/042 ,  C07C118/02 ,  C07C125/03

Abstract: Prepn. of carbamoyl chlorides and isocyanates comprises reacting a solid primary amine salt with COCl2 at high temp. The amine salt is pref. a hydrochloride. The reaction temp. is pref. 10-70 degrees C. below the m.pt. of the salt (generally 145-250 degrees C.). The particle size of the salt is pref. 1-500 (esp. 2-50) mu. The reactor can be a rotating tube, a reactor equipped with stirrer paddles, or an fluidised bed reactor in which the support material is pref. Al2O3. The carbamoyl chloride produced can be sepd. from the gaseous reaction products by quenching in an inert solvent; the resulting solnl. can then by distd. to form and isolate the isocyanate. The products are useful as intermediates for biologically active cpds., plant protection agents, polyurethanes, etc. The process is esp. useful for preparing aliphatic diisocyanates, which can be converted to light-stable polyurethanes. The process gives high yields (e.g. 50-98%) and is suitable for use on an industrial scale.

公开(公告)号：DE2201866A1

公开(公告)日：1973-07-19

申请号：DE2201866

申请日：1972-01-15

Applicant: BASF AG

Inventor： HECK WOLFGANG DR ,  REINICKE HELMUT DR ,  STOCKBURGER DIETER DR ,  THOMA PETER DR

IPC: C01F7/30 ,  C01F7/02

Abstract: Aq. AlCl3 solns, esp. those remaining after Friedel-Craft synthesis, are economically converted back to AlCl3 for re-use, by spraying onto a fluidised bed of aluminium oxychloride at 70-150 (95-115) degrees C. The product is then heated at 400-800 (400-600) degrees C to yield Al2O3 contg. residual Cl. The grain size, being coarse, is esp. suited for chlorination, with CoCl2. Pref. the solns. to be treated contain >=20 wt.% AlCl3, but the process is effective for any AlCl3 content.

公开(公告)号：DE4005211A1

公开(公告)日：1991-08-22

申请号：DE4005211

申请日：1990-02-20

Applicant: BASF AG

Inventor： MUELLER MICHAEL WOLFGANG DR ,  SCHWAB EKKEHARD DR ,  AUWETER HELMUT DR ,  KLINGELHOEFER PAUL DR ,  STOCKBURGER DIETER DR

IPC: C01G37/027 ,  G11B5/706

Abstract: Coercive finely-divided chromium dioxide contg. iron as a modifying agent is stabilised by tempering at 150-450 deg.C over a period of 10-360 mins. suspending in water and treating with an aq. soln. of a reductant at 20-95 deg.C. A gas stream moistened with water is passed over the chromium dioxide during the tempering stage. USE/ADVANTAGE - Acicular chromium dioxide is formed which is used for magnetic recording substrates. The material has a high coercive field strength. In an example, 973.6g Cr03 was stirred into 380g water. After 10 mins. 5.56g K-antimonyltartrate (Ksbo(C4H406)0.5H20) was added and also 48.56g acicular gamma-Fe203. After gas evolution had ceased 480g Cr203 was added and the mixt. stirred for a further 20 mins. The mixt. was then heated in an autoclave to 300-350 deg.C. producing chromium dioxide, which was then removed from the vessel, ground and tempered for 30 mins. at 380 deg.C. The tempered chromium dioxide was then suspended in an aq. soln. of Na-sulphite at 85 deg.C filtered, washed with water and dried in a vacuum at 50 deg.C. The chromium dioxide had a coercive field strength (Hc) of 53.5 kA/m.

公开(公告)号：DE2606364A1

公开(公告)日：1977-09-01

申请号：DE2606364

申请日：1976-02-18

Applicant: BASF AG

Inventor： WINTERMANTEL KLAUS DIPL ING DR ,  STOCKBURGER DIETER DR ,  FUCHS HUGO DIPL CHEM DR

IPC: B01D9/04 ,  B01D9/00 ,  B01D9/02 ,  C07C37/84 ,  C07C39/14 ,  C07C51/43

Abstract: A method of separation by fractional crystallization from a liquid mixture in which the liquid mixture is repeatedly passed in turbulent flow through an indirectly cooled crystallization zone, which must be kept full. The liquid remaining after deposition of a layer of crystals on the wall of the crystallization zone is removed, whereupon the surface of the layer of crystals is washed and the crystals are melted by passing a melt of similar compositions to that of the layer of crystals through the crystallization zone. During crystallization the melt is maintained at the temperature of crystallization and crystallization is stopped when the frozen fraction is from 70 to 98%.

公开(公告)号：DE2140193A1

公开(公告)日：1973-02-22

申请号：DE2140193

申请日：1971-08-11

Applicant: BASF AG

Inventor： KAHR KURT DR ,  LEONHARD KARL WILHELM DR ,  STOCKBURGER DIETER DR ,  SAEUBERLICH MANFRED DIPL ING

IPC: B01J2/02 ,  C07D201/02 ,  C07D201/16 ,  C07D41/06

公开(公告)号：CH518729A

公开(公告)日：1972-02-15

申请号：CH1059171

申请日：1971-07-19

Applicant: BASF AG

Inventor： STOCKBURGER DIETER DR ,  THOMA PETER DR

IPC: B01D46/02