公开(公告)号：DE2724365A1

公开(公告)日：1978-11-30

申请号：DE2724365

申请日：1977-05-28

Applicant: BASF AG

Inventor： STOCKBURGER DIETER DIPL ING DR ,  VOLKAMER KLAUS DIPL CHEM DR ,  BENDER DETLEF DIPL ING DR ,  SCHNEIDER KLAUS-JUERGEN DIPL I ,  SCHWENTKER HARALD DIPL CHEM DR ,  WAGNER ULRICH DIPL PHYS DR ,  WEITZ HANS-MARTIN DIPL CHEM DR

IPC: B01D3/40 ,  C07C1/00 ,  C07C7/08 ,  C07C9/00 ,  C07C11/00 ,  C07C11/167 ,  C07C67/00

Abstract: A process for separating, by means of a selective solvent, a mixture of C4-hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.

公开(公告)号：DE3119968A1

公开(公告)日：1982-12-16

申请号：DE3119968

申请日：1981-05-20

Applicant: KALI & SALZ AG ,  BASF AG

Inventor： WINTERMANTEL KLAUS DIPL ING DR ,  STOCKBURGER DIETER DIPL ING DR ,  HOLLSTEIN AXEL DIPL ING ,  KUNZE DIETMAR DIPL CHEM DR ,  WERDELMANN FRITHJOF CHEM ING

IPC: C01F5/34 ,  B01J2/16 ,  B01J21/16 ,  C01F5/30

Abstract: A process and an apparatus for single-stage preparation of magnesium chloride granules in a fluidized bed having a temperature of from 120 to 140 DEG C is described, from which magnesium chloride granules having a water content of from 40 to 28 % by weight are drawn off as the product.

公开(公告)号：DE3044518A1

公开(公告)日：1982-07-01

申请号：DE3044518

申请日：1980-11-26

Applicant: BASF AG

Inventor： STOCKBURGER DIETER DIPL ING DR ,  SCHULTZ WILHELM DIPL ING ,  SCHMIDT JOHANNES E DIPL CHEM D ,  WIRTH FRIEDRICH DIPL CHEM DR ,  HOFFMANN HERWIG DIPL CHEM DR ,  HOLZKNECHT BERNHARD DIPL ING D ,  WINTERMANTEL KLAUS DIPL ING DR

IPC: C07D307/89 ,  C07C51/265 ,  C07C51/31