公开(公告)号：FI931712A

公开(公告)日：1994-06-15

申请号：FI931712

申请日：1993-04-15

Applicant: BASF AG

Inventor： STABEL UWE ,  WUNSCH GERD ,  WOERZ HELMUT ,  FRIED ANDREAS ,  KOTKAMP RUEDIGER

IPC: C07C7/00 ,  C07C7/04 ,  C07C13/465 ,  C07C15/44 ,  C07C15/46 ,  C08J11/14 ,  C08L25/02 ,  C10G7/00 ,  C10G9/00 ,  C10G70/04

Abstract: In a process for the recovery of a polymerizable useful fraction, consisting of styrene, methylstyrenes, vinyltoluenes, indene, methylindenes and fractions whose boiling points are between styrene and methylindenes, from the crack gases of a steam cracker, the sidestream of the crack gas column is divided, by means of a distillation unit, into the useful fraction and into fractions which are recycled to the crack gas column.

公开(公告)号：NO932555D0

公开(公告)日：1993-07-14

申请号：NO932555

申请日：1993-07-14

Applicant: LINDE AG ,  BASF AG

Inventor： BOELT HEINZ ,  SCHOENEBORN AXEL ,  WUMSCH GERD ,  STABEL UWE ,  WALSER FRANZ

IPC: B01D46/00 ,  B01D45/12 ,  B01D50/00

Abstract: The invention relates to a process and a separation system for removing particles, in particular soot particles, from particle-containing process gas streams occurring in chemical or petrochemical plants. According to the invention, the particle removal is carried out in a partly thermally regenerable separation system. The particles are advantageously removed from the gas stream in a two-stage separation system, the first stage being composed of centrifugal separators, preferably multicyclones, and the second stage being composed of fine filters made of sintered metals, preferably of ferritic sintered metals. For the regeneration, the temperature is increased to a value above the ignition temperature of soot and, if required, an oxygen-containing auxiliary gas is added. The regeneration is preferably carried out periodically.

公开(公告)号：CA2036627A1

公开(公告)日：1991-08-21

申请号：CA2036627

申请日：1991-02-19

Applicant: STABEL UWE ,  GOSCH HANS JUERGEN ,  FISCHER ROLF ,  HARDER WOLFGANG ,  HECHLER CLAUS ,  BASF AG

Inventor： STABEL UWE ,  GOSCH HANS-JUERGEN ,  FISCHER ROLF ,  HARDER WOLFGANG ,  HECHLER CLAUS

IPC: B01J21/16 ,  C07B61/00 ,  C07B63/04 ,  C07D307/08

Abstract: A process is described for isolating tetrahydrofuran from mixtures containing tetrahydrofuran, 1,4-butanediol, ~-butyrolactone and succinic acid esters, in which the mixtures are heated to from 150 to 250.degree.C in the presence of phyllosilicates, the resultant tetrahydrofuran and water of reaction are removed from the reaction mixture by distillation, and the tetrahydrofuran is separated from the distillate.