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.

公开(公告)号：CH407148A

公开(公告)日：1966-02-15

申请号：CH1178862

申请日：1962-10-08

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR ,  PFAFF PETER DR ,  GEORG STUEBER ,  BILLE HEINZ DR

IPC: C07C87/14 ,  C07C85/16

公开(公告)号：CH415640A

公开(公告)日：1966-06-30

申请号：CH498262

申请日：1962-04-25

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR ,  STREHLER HUGO DR ,  RAPP GUENTHER DR ,  KAHR KURT DR

IPC: C01C1/242 ,  C07D201/16 ,  C07D41/06

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：DE975238C

公开(公告)日：1961-10-12

申请号：DEB0027045

申请日：1953-08-18

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR

IPC: C08F16/12 ,  C08G61/00 ,  C08G65/34

公开(公告)号：DE933786C

公开(公告)日：1955-10-06

申请号：DEB0027046

申请日：1953-08-18

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR

IPC: C08F222/02

公开(公告)号：NL141509B

公开(公告)日：1974-03-15

申请号：NL277685

申请日：1962-04-26

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR ,  STREHLER HUGO DR ,  RAPP GUENTHER DR ,  KAHR EN DR KURT

IPC: C01C1/242 ,  C07D201/16 ,  C07D41/08 ,  C01C1/24

公开(公告)号：CH452895A

公开(公告)日：1968-03-15

申请号：CH1029365

申请日：1965-07-22

Applicant: BASF AG

Inventor： LINGE HERMANN DR ,  NIESWANDT WERNER DR ,  EBERHARD SCHAEFER

IPC: B01D11/02 ,  C08G69/46

公开(公告)号：DE937851C

公开(公告)日：1956-01-19

申请号：DEB0025822

申请日：1953-05-31

Applicant: BASF AG

Inventor： NIESWANDT WERNER DR

IPC: C08F4/34 ,  C08F283/01