公开(公告)号：DE59407510D1

公开(公告)日：1999-02-04

申请号：DE59407510

申请日：1994-04-15

Applicant: HOECHST AG

Inventor： STEINER RUDOLF PROF DR ,  KOENIG AXEL DR ,  RITTNER SIEGBERT DR

IPC: B01D9/02 ,  B01D9/00 ,  C07C7/14 ,  C07C17/392

公开(公告)号：DE3161214D1

公开(公告)日：1983-11-24

申请号：DE3161214

申请日：1981-03-16

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  SCHAFER HANS ,  STEINER RUDOLF PROF DR

IPC: B01D19/00 ,  B01D53/14 ,  B01D53/18 ,  B01F3/04 ,  B01F13/10 ,  B01J10/00 ,  C02F3/22 ,  B01J19/04

公开(公告)号：DE3323940A1

公开(公告)日：1985-01-10

申请号：DE3323940

申请日：1983-07-02

Applicant: HOECHST AG

Inventor： BRAUN GERO DR ,  SCHMITZ HERMANN DR ,  KUEHLEIN KLAUS DR ,  STEINER RUDOLF PROF DR

IPC: B01D11/02 ,  C08F6/28 ,  C08G2/28 ,  C08G85/00 ,  C08J9/22 ,  C08F6/10

Abstract: The invention relates to a process for the purification of polymers by reducing the content of low-molecular-weight products by treating the polymer with a gas in the supercritical stage as extractant. In particular in the case of poly(meth)acrylamides, the process according to the invention offers a number of advantages.

公开(公告)号：CH642275A5

公开(公告)日：1984-04-13

申请号：CH689679

申请日：1979-07-25

Applicant: HOECHST AG

Inventor： STEINER RUDOLF PROF DR ,  HERBRECHTSMEIER PETER DR

IPC: B01J10/00

公开(公告)号：DE3161212D1

公开(公告)日：1983-11-24

申请号：DE3161212

申请日：1981-03-16

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  SCHAFER HANS ,  STEINER RUDOLF PROF DR

IPC: B01D19/00 ,  B01D53/14 ,  B01D53/18 ,  B01F3/04 ,  B01F5/00 ,  B01J4/00 ,  B01J10/00 ,  C02F3/22 ,  B01J19/04

Abstract: The invention provides a process for multistep gassing of liquids streaming downward in a gassing apparatus, which comprises using a gassing apparatus consisting of at least two superposed downstream parts, wherein the gas is fed in at the upper end of each downstream part, the gas bubbles are separated at the lower end of each downstream part and the separated gas bubbles are discharged to the outside. The invention provides furthermore a corresponding gassing apparatus.

公开(公告)号：DE3011614A1

公开(公告)日：1981-10-01

申请号：DE3011614

申请日：1980-03-26

Applicant: HOECHST AG

Inventor： HERBRECHTSMEIER PETER DR ,  SCHAEFER HANS DIPL ING ,  STEINER RUDOLF PROF DR

IPC: B01D19/00 ,  B01D53/14 ,  B01D53/18 ,  B01F3/04 ,  B01F5/00 ,  B01J4/00 ,  B01J10/00 ,  C02F3/22

Abstract: The invention provides a process for multistep gassing of liquids streaming downward in a gassing apparatus, which comprises using a gassing apparatus consisting of at least two superposed downstream parts, wherein the gas is fed in at the upper end of each downstream part, the gas bubbles are separated at the lower end of each downstream part and the separated gas bubbles are discharged to the outside. The invention provides furthermore a corresponding gassing apparatus.

公开(公告)号：DE59402337D1

公开(公告)日：1997-05-15

申请号：DE59402337

申请日：1994-04-15

Applicant: HOECHST AG

Inventor： STEINER RUDOLF PROF DR ,  KOENIG AXEL DR ,  RITTNER SIEGBERT DR

IPC: C07B63/00 ,  B01D9/00 ,  C07C7/14 ,  C07C15/24 ,  C07C17/38 ,  C07C17/392 ,  C07C25/08 ,  C07C51/43

公开(公告)号：DE4313101C1

公开(公告)日：1994-08-11

申请号：DE4313101

申请日：1993-04-22

Applicant: HOECHST AG

Inventor： STEINER RUDOLF PROF DR ,  KOENIG AXEL DR ,  RITTNER SIEGBERT DR

IPC: B01D9/02 ,  B01D9/00 ,  C07C7/14 ,  C07C17/392 ,  C07C17/38

Abstract: In the process for separating or purifying substances by crystallisation from melts or highly concentrated solutions at elevated pressures, gas is dissolved in the crystallising melt which outgasses again after crystallisation when the pressure is decreased. As a result, impurities which are still adhering or enclosed are removed.

公开(公告)号：ES2051042T3

公开(公告)日：1994-06-01

申请号：ES91105399

申请日：1991-04-05

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  SCHMIDT ADOLF DR ,  STEINER RUDOLF PROF DR ,  UNVERDORBEN LEONHARD

IPC: C07C17/38 ,  C07C17/386 ,  C07C25/08

Abstract: The invention relates to a process for the separation of m- and p-dichlorobenzene by extractive rectification using an extractant and removal of this extractant, in which the extractants used are alkylene carbonates of the general formula … … in which R , R , R and R are identical to or different from one another and represent hydrogen, a methyl or an ethyl radical, with the proviso that the radicals R to R together do not contain more than 6 C atoms. … The process according to the invention makes it possible to separate off the m isomer in high purity.

公开(公告)号：DE4011501A1

公开(公告)日：1991-10-17

申请号：DE4011501

申请日：1990-04-10

Applicant: HOECHST AG

Inventor： RITTNER SIEGBERT DR ,  SCHMIDT ADOLF DR ,  STEINER RUDOLF PROF DR ,  UNVERDORBEN LEONHARD DIPL ING

IPC: C07C17/38 ,  C07C17/386 ,  C07C25/08

Abstract: The invention relates to a process for the separation of m- and p-dichlorobenzene by extractive rectification using an extractant and removal of this extractant, in which the extractants used are alkylene carbonates of the general formula … … in which R , R , R and R are identical to or different from one another and represent hydrogen, a methyl or an ethyl radical, with the proviso that the radicals R to R together do not contain more than 6 C atoms. … The process according to the invention makes it possible to separate off the m isomer in high purity.