公开(公告)号：DE2861726D1

公开(公告)日：1982-05-19

申请号：DE2861726

申请日：1978-12-12

Applicant: BASF AG

Inventor： HOERAUF WERNER DR ,  VALENTIN GUENTER

IPC: C08F6/00 ,  C08G63/78 ,  C08G63/88 ,  C08G69/00 ,  C08G69/30 ,  C08J3/00 ,  B29B3/00

公开(公告)号：DE2860648D1

公开(公告)日：1981-08-06

申请号：DE2860648

申请日：1978-07-26

Applicant: BASF AG

Inventor： HOERAUF WERNER DR ,  VALENTIN GUENTER ,  KEGEL ROBERT ,  KUHN HELMUT

IPC: B29B9/00 ,  B29B7/00 ,  B29B9/06 ,  B29C47/00 ,  B29C47/78 ,  B29C48/30 ,  B29C48/76 ,  B29C48/92 ,  B29F3/04 ,  B29F3/03

Abstract: A process for removing volatile constituents which are evolved from plastic melts when extruding the latter and are drawn off together with the surrounding air. The volatile constituents are drawn off immediately as they are evolved by the plastic melt and the air containing such volatile constituents is heated immediately after entering the suction orifice, and an apparatus for carrying out this process.

公开(公告)号：DE1770097A1

公开(公告)日：1971-09-30

申请号：DE1770097

申请日：1968-03-30

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR ,  LINGE HERMANN DR ,  HOERAUF WERNER DR ,  PIZER HANS DR ,  HETZ HERBERT

IPC: C08G69/46 ,  C08G20/42

Abstract: 1,255,552. Making extracts, solutions &c. BADISCHE ANILIN- & SODA-FABRIK A.G. 28 March, 1969 [30 March, 1968], No. 16389/69. Heading B1Q [Also in Division C3] In apparatus for continuously contacting polyamide particles with an extraction agent, e.g. H 2 O or C 1-4 alkanols, flowing from bottom to top of an elongated extraction zone, some or all of the agent is removed in the upper part of the zone at a point and reintroduced above or below. The length of the zone, if of circular cross-section, is preferably 5-40 times the diameter. Agent removed may pass through a heater or cooler before reintroduction. Dimensions of the apparatus are exemplified.

公开(公告)号：DE3375591D1

公开(公告)日：1988-03-10

申请号：DE3375591

申请日：1983-02-07

Applicant: BASF AG

Inventor： STREHLER HUGO DR ,  VALENTIN GUENTER ,  HOERAUF WERNER DR

IPC: D01F6/00 ,  D01D5/088 ,  D01D13/00

公开(公告)号：DE3266925D1

公开(公告)日：1985-11-21

申请号：DE3266925

申请日：1982-07-07

Applicant: BASF AG

Inventor： BELDE HORST ,  LANGENFELDER HANS ,  HOERAUF WERNER DR

IPC: C09D17/00

Abstract: Aqueous suspensions of finely divided titanium dioxide are produced in the presence of dispersants by a process in which titanium dioxide powder and caprolactam are kneaded together in the dry state at from 15 DEG to 40 DEG C., the resulting mixture is kneaded with the addition of water, the paste thus obtained is suspended in water, the suspension is then allowed to sediment, and the resulting suspension containing finely divided titanium dioxide is decanted.

公开(公告)号：CH602825A5

公开(公告)日：1978-08-15

申请号：CH1609676

申请日：1976-12-21

Applicant: BASF AG

Inventor： MATTHIES PAUL DR ,  KUNDE JOACHIM DR ,  HOERAUF WERNER DR

IPC: C08G69/00 ,  C08G69/16

公开(公告)号：DE3262979D1

公开(公告)日：1985-05-15

申请号：DE3262979

申请日：1982-07-07

Applicant: BASF AG

Inventor： STREHLER HUGO DR ,  HOERAUF WERNER DR ,  VALENTIN GUENTER

IPC: C08J3/22 ,  C08K3/22 ,  C08L77/02 ,  C09D17/00

Abstract: Concentrates of from 20 to 50% by weight of titanium dioxide in polycaprolactam are produced by a process in which a 5-15% strength by weight aqueous suspension of titanium dioxide is metered into a solution of caprolactam in water at from 100 DEG to 150 DEG C. at the same rate at which water is distilled off, and after the water has been distilled off the resulting mixture is polymerized at from 240 DEG to 280 DEG C.

公开(公告)号：DE3262150D1

公开(公告)日：1985-03-14

申请号：DE3262150

申请日：1982-08-26

Applicant: BASF AG

Inventor： STREHLER HUGO DR ,  HOERAUF WERNER DR ,  VALENTIN GUENTER ,  URBANEK FRIEDRICH DR

IPC: C08G69/16 ,  C08G69/46

公开(公告)号：DE2404510A1

公开(公告)日：1975-08-14

申请号：DE2404510

申请日：1974-01-31

Applicant: BASF AG

Inventor： DIETRICH ERNST ,  GUENTHER ERNST DIPL ING ,  HOERAUF WERNER DR ,  KISSEL ERNST DIPL ING ,  VALENTIN GUENTER

IPC: C08G69/00 ,  B01D11/00 ,  B01D11/02 ,  C08G69/04 ,  C08G69/46

Abstract: An extraction tube for the continuous removal of low molecular weight components of polylactam granules by means of hot water by the countercurrent principle of operation, the water being fed upwardly and the granules downwardly, the tube being provided with inlets and outlets for the granules and the water and exhibiting baffles within the tube, wherein there is provided, within the tube, a heat exchanger which A. DIVIDES THE TUBE INTO TWO SECTIONS BEARING A RATIO TO EACH OTHER OF FROM 50:50 TO 85:15 BY VOLUME, THE SMALLER SECTION BEING AT THE TOP OF THE TUBE, B. EXHIBITS DUCTS FOR THE GRANULES OVER THE ENTIRE CROSS-SECTION OF THE TUBE AND C. HAS TOP SURFACES FACING THE STREAM OF GRANULES, WHICH SURFACES ARE INCLINED TOWARD THE DUCTS TO AN ANGLE beta TO THE HORIZONTAL, THIS ANGLE BEING EQUAL TO OR GREATER THAN THE ANGLE OF REPOSE OF THE GRANULES BUT LESS THAN 90 DEG , FURTHER SIMILAR HEAT EXCHANGERS BEING PROVIDED BENEATH SAID HEAT EXCHANGER IF DESIRED.

公开(公告)号：DE2242642A1

公开(公告)日：1974-04-11

申请号：DE2242642

申请日：1972-08-30

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR ,  HOERAUF WERNER DR ,  GUENTHER ERNST DIPL ING ,  KISSEL ERNST DIPL ING ,  NEUMANN ECKART DIPL ING ,  VALENTIN GUENTER

IPC: C08G69/00 ,  B01D11/02 ,  C07D201/12 ,  C08G69/46 ,  C08G20/42

Abstract: Continuous extraction of polylactam granules for the removal of monomers and/or oligomers therefrom by means of hot water flowing countercurrently in an extraction zone, which extraction zone is divided into subzones by at least one heating zone and the water is accelerated, at certain time intervals, cocurrently and countercurrently to the flow of granules.