公开(公告)号：DE19824788A1

公开(公告)日：1999-12-09

申请号：DE19824788

申请日：1998-06-03

Applicant: BASF AG

Inventor： FEINDT HANS-JACOB ,  WITT MICHAEL ,  RIZK FARID ,  MAGIN ALBERT ,  BERTICH HEINZ ,  WALTER CHRISTIAN ,  SCHICKETANZ WALTER ,  GRUBER WOLFGANG

IPC: B29B13/06 ,  B29C31/04 ,  B65G53/30

Abstract: Granules are concentrated in a side stream of the water used during granulation (for cooling and cutter lubrication). This side stream forms the conveying medium for the granules. Preferred features: The side stream of granulation water contains 15-35 wt%, preferably 15-25 wt% of granules. Separation between granulator (C) and storage location exceeds 200 m, preferably exceeding 500 m. Drying of granules takes place in the immediate vicinity of further treatment and/or storage. Side stream temperature after leaving the separator (D) is raised, especially through 5-40 deg K. Vertical relationships between: granulator, side stream handling plant (G), and if appropriate, the drying unit (H), facilitate granule conveying to further processing and/or storage.

公开(公告)号：ZA905453B

公开(公告)日：1992-03-25

申请号：ZA905453

申请日：1990-07-12

Applicant: BASF AG

Inventor： TISCHENDORF KLAUS JUERGEN ,  KLAUS JUERGEN TISCHENDORF ,  LIEBSCHER MANFRED ,  MANFRED LIEBSCHER ,  RIZK FARID ,  FARID RIZK ,  ZAHRADNIK FRANZ ,  FRANZ ZAHRADNIK

IPC: C08G69/46 ,  B29B13/06 ,  B29K77/00 ,  C08G69/00 ,  F26B17/14 ,  F26B21/14 ,  B29B ,  C08G

Abstract: Polyamide granules are dried and heated by feeding a suspension of granules in water into a sieve (1), where the bulk of the water is removed, and then into a tower dryer (10), where they are deposited in bed form and then freed of the remaining water while moving in plug flow under the force of gravity with a counter-current inert gas stream at from 70 DEG to 200 DEG C. The tower dryer possesses an inlet at the top (11) and outlet at the bottom (34) for the granules and also feed lines (20, 22, 31) for the inert gas. To achieve a uniform degree of drying of the granules, the inert gas is divided on entry into the tower dryer at a point between the drying zone and the heating zone into a stream which flows radially inward into the bed of granules on the one hand and a stream which flows radially inward and outward on the other. In this way the inert gas is distributed particularly uniformly and the granules are dryable in a very short drying zone down to a water content of 0.0001 kg of water/kg of polymer. The lower, conically tapered area of the tower dryer-bin 30-ensures a uniform rate of descent of the granules and hence a uniform solid-phase condensation with a favorable molecular weight distribution. The tower dryer (10) is followed by a fluidized bed cooler (41) in which the granules are cooled with air to

公开(公告)号：DE10130670A1

公开(公告)日：2003-01-23

申请号：DE10130670

申请日：2001-06-28

Applicant: BASF AG

Inventor： STABEL UWE ,  BIRNBAUM EBERHARD ,  RIZK FARID ,  SCHLICHTHAERLE GOTTFRIED

IPC: B01J8/10 ,  B01J8/12 ,  C07C5/333 ,  B01J8/00 ,  C07C11/06 ,  C07C15/46

Abstract: The invention relates to the implementation of heterogeneous catalytic reactions in a moving-bed reactor. Expansion volumes for the catalyst are provided in the defining walls of the catalyst bed, said volumes being easily created by means of at least two graduated conical-or polygonal-frustrum-shaped walls. Said implementation reduces the catalyst abrasion and avoids damaging the catalyst screens.

公开(公告)号：DE59700874D1

公开(公告)日：2000-01-27

申请号：DE59700874

申请日：1997-05-27

Applicant: BASF AG

Inventor： BIALLAS BERND ,  DUSCHEK WOLFGANG ,  RIZK FARID ,  FEINDT HANS-JACOB

IPC: B05B7/14 ,  B65G53/46 ,  B65G53/66 ,  G05D16/20

公开(公告)号：ZA9005453B

公开(公告)日：1992-03-25

申请号：ZA9005453

申请日：1990-07-12

Applicant: BASF AG

Inventor： TISCHENDORF KLAUS JUERGEN ,  KLAUS JUERGEN TISCHENDORF ,  LIEBSCHER MANFRED ,  MANFRED LIEBSCHER ,  RIZK FARID ,  FARID RIZK ,  ZAHRADNIK FRANZ ,  FRANZ ZAHRADNIK

IPC: C08G69/46 ,  B29B13/06 ,  B29K77/00 ,  C08G69/00 ,  B29B ,  C08G

CPC classification number: B29B13/065