公开(公告)号：DE2242641A1

公开(公告)日：1974-04-11

申请号：DE2242641

申请日：1972-08-30

Applicant: BASF AG

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

IPC: C08G69/00 ,  B01D11/02 ,  C08G69/46 ,  C08J9/26 ,  C08G20/42

Abstract: The continuous countercurrent extraction of polylactam granules with hot water in an extraction zone for the removal of monomer and/or oligomers, the extraction zone being subdivided into subzones by at least one heating zone. The density of the extract-containing water differs by at least 0.0002 between the subzones.

公开(公告)号：DE2530304A1

公开(公告)日：1977-01-20

申请号：DE2530304

申请日：1975-07-08

Applicant: BASF AG

Inventor： DIETRICH ERNST ,  GUENTHER ERNST DIPL ING ,  HOERAUF WERNER DIPL ING ,  KISSEL ERNST DIPL ING ,  LINGE HERMANN DR ,  NEUMANN ECKART DIPL ING ,  SCHAEFER EBERHARD

IPC: C08G69/00 ,  B29B13/06 ,  F26B17/14 ,  F26B21/14 ,  B29B3/04

Abstract: A vertical cylinder for drying and heating granules which includes an inlet at the top of the cylinder, a conically tapered outlet at the bottom of the cylinder, a rotatable screening ring beneath the inlet, a chute beneath the screening ring and a scraper above the ring inlets for gases in the downward extending section of the cylinder, a shell and tube heat exchanger located coaxially in the bottom quarter of the cylinder, a horizontally movable grid as flow control device below the heat exchange and a discharge zone below the grid.

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.