公开(公告)号：CA2185393A1

公开(公告)日：1997-03-14

申请号：CA2185393

申请日：1996-09-12

Applicant: HOECHST AG

Inventor： SEMEL JOACHIM ,  TETZLAFF HERIBERT

IPC: B01D11/04 ,  C02F1/26 ,  C02F1/58 ,  A62D3/00

Abstract: Process for eliminating adsorbable organic halogen compounds from wastewaters The invention relates to a process for eliminating adsorbable organic halogen compounds from an aqueous phase, in particular from wastewater or from a process solution, in which the aqueous phase is treated with a nonaqueous extraction medium in a liquid-liquid extraction, which comprises, after the extraction, subjecting the adsorbable organic halogen compounds to a Wurtz-Fittig reaction in the extraction medium. Only small amounts of noncritical products such as NaOH and HCI, which can be readily removed, are formed in the nonaqueous extraction medium. By means of this process, the cost of the chemicals which conventionally arises in the elimination of the adsorbable organic halogen compounds is considerably decreased.

公开(公告)号：CA2007101A1

公开(公告)日：1990-07-28

申请号：CA2007101

申请日：1990-01-04

Applicant: HOECHST AG

Inventor： ERPENBACH HEINZ ,  GOEDICKE EITEL ,  LORK WINFRIED ,  TETZLAFF HERIBERT

IPC: B01J38/00 ,  B01J31/40 ,  B01J38/04 ,  C07B61/00 ,  C07C27/00 ,  C07C27/26 ,  C07C51/12 ,  C07C51/373 ,  C07C51/42 ,  C07C51/54 ,  C07C51/56 ,  C07C51/573 ,  C07C53/08 ,  C07C53/12 ,  C07C67/37 ,  C07C69/16

Abstract: In a process for the purification and recovery of a contaminated catalyst solution produced during carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of rhodium, organic and/or inorganic promoters, undistillable organic impurities and acetic acid, acetic anhydride and ethylidene diacetate, the organic impurities and acetic acid, acetic anhydride and ethylidene diacetate are removed from the contaminatd catalyst solution by extraction at pressures from 35 to 450 bar and temperatures from 0 DEG to 120 DEG C. with a liquefied or supercritical gas, and the phase of the liquefied or supercritical gas is separated from the purified, promoter-containing catalyst solution, the phase of the liquefied or supercritical gas is separated by flash vaporization, the recovered gas is re-employed for extraction, acetic acid, acetic anhydride and ethylidene diacetate are separated off from the component which remains liquid, and are combined with the purified catalyst complex to prepare fresh catalyst solution and, finally, the organic impurities remaining as the residue on separation of the phase of the liquefied or supercritical gas is purged.

公开(公告)号：CA2049689A1

公开(公告)日：1992-02-24

申请号：CA2049689

申请日：1991-08-22

Applicant: HOECHST AG

Inventor： MILDENBERGER HILMAR ,  KNORR HARALD ,  SCHULZ ARNO ,  TETZLAFF HERIBERT

IPC: C07C227/40 ,  C07C229/24 ,  C07F9/30 ,  C07F9/50

Abstract: HOE 90/F 254 of the disclosure A process for the extractive separation of L-phosphino-thricin and L-glutamic acid in aqueous solution A large number of customary processes for separating amino acids fails when very polar hydrophilic amino acids with isoelectric points (IEP) which are close to one another are to be fractionated. Mixtures of L-glutamic acid (IEP = 3.24) and L-phosphinothricin (IEP = 2.6) produced by enzymatic transaminations of the corresponding .alpha.-keto acid have been difficult to separate to date. The invention relates to a process for separating L-phosphinothricin and L-glutamic acid, which comprises carrying out the separation as liquid/liquid extraction with two non-miscible aqueous phases as phase system, where the phase former contained in the phase system is a combination of at least two different water-soluble polymers or of at least one water-soluble salt and one water-soluble polymer, and the extraction is carried out by multistage countercurrent partition on the van Dijck principle.

公开(公告)号：CA2087093A1

公开(公告)日：1992-01-13

申请号：CA2087093

申请日：1991-06-27

Applicant: HOECHST AG

Inventor： TETZLAFF HERIBERT ,  MUELLER INGRID ,  RITTNER SIEGBERT ,  WINGEN RAINER

IPC: C07D239/36 ,  C07D239/38 ,  C09K19/34

Abstract: (57) Disclosed is a method for the separation by multi-stage extraction of 2-alkylthio-5-phenylpyrimidines of general formula (I) in which R1 is H or an alkyl group with 1 to 15 C-atoms, X is an oxygen atom or a single bond and R2 is an alkyl with 1 to 15 C-atoms, using two organic solvents which give two immiscible phases. The method has the advantage that the phenyl pyrimidines are obtained from the reaction mixture at a high level of purity even on a commercial scale.

公开(公告)号：CA2024349A1

公开(公告)日：1991-03-01

申请号：CA2024349

申请日：1990-08-30

Applicant: HOECHST AG

Inventor： MILDENBERGER HILMAR ,  LACHHEIN STEPHEN ,  RITTNER SIEGBERT ,  TETZLAFF HERIBERT

IPC: C07C29/86 ,  C07C31/02 ,  C07C31/04 ,  C07C41/38 ,  C07C43/15

Abstract: of the disclosure Process for separating off enol ethers from reaction mixtures containing alcohols The invention relates to a gentle process for the separation of enol ethers from mixtures containing watersoluble alcohols by extraction, wherein an aqueous solution of a base is used as the extraction agent in a phase ratio of the amounts of the aqueous phase : enol ether/alcohol mixture of at least 0.5 : 1 and the extraction is carried out in several stages or continuously with a theoretical number of stages of at least two. The process is particularly suitable for separating off enol ethers which readily decompose during distillation.

公开(公告)号：NO930027A

公开(公告)日：1993-01-06

申请号：NO930027

申请日：1993-01-06

Applicant: HOECHST AG

Inventor： TETZLAFF HERIBERT ,  MUELLER INGRID ,  RITTNER SIEGBERT ,  WINGEN RAINER

IPC: C07D20060101 ,  C07D

公开(公告)号：PT98750A

公开(公告)日：1992-07-31

申请号：PT9875091

申请日：1991-08-22

Applicant: HOECHST AG

Inventor： MILDENBERGER HILMAR ,  KNORR HARALD ,  SCHULZ ECKHARD ,  TETZLAFF HERIBERT

IPC: C07C227/40 ,  C07C229/24 ,  C07F9/30 ,  C07F9/50 ,  C07B

Abstract: A large number of customary processes for separating amino acids fails when very polar hydrophilic amino acids with isoelectric points (IEP) which are close to one another are to be fractionated. Mixtures of L-glutamic acid (IEP=3.24) and L-phosphinothricin (IEP=2.6) produced by enzymatic transaminations of the corresponding alpha -keto acid have been difficult to separate to date. The invention relates to a process for separating L-phosphinothricin and L-glutamic acid, which comprises carrying out the separation as liquid/liquid extraction with two non-miscible aqueous phases as phase system, where the phase former contained in the phase system is a combination of at least two different water-soluble polymers or of at least one water-soluble salt and one water-soluble polymer, and the extraction is carried out by multistage countercurrent partition on the van Dijck principle.

公开(公告)号：ZA906922B

公开(公告)日：1991-06-26

申请号：ZA906922

申请日：1990-08-30

Applicant: HOECHST AG

Inventor： SIEGBERT RITTNER ,  LACHHEIN STEPHEN ,  STEPHEN LACHHEIN ,  TETZLAFF HERIBERT ,  HERIBERT TETZLAFF ,  MILDENBERGER HILMAR ,  HILMAR MILDENBERGER ,  RITTNER SIEGBERT

IPC: C07C29/86 ,  C07C31/02 ,  C07C31/04 ,  C07C41/38 ,  C07C43/15 ,  C07C

Abstract: The invention relates to a gentle process for the separation of enol ethers from mixtures containing water-soluble alcohols by extraction, wherein an aqueous solution of a base is used as the extraction agent in a phase ratio of the amounts of the aqueous phase: enol ether/alcohol mixture of at least 0.5:1 and the extraction is carried out in several stages or continuously with a theoretical number of stages of at least two. The process is particularly suitable for separating off enol ethers which readily decompose during distillation.

公开(公告)号：BR8904332A

公开(公告)日：1990-04-17

申请号：BR8904332

申请日：1989-08-29

Applicant: HOECHST AG

Inventor： LENDLE WILHELM ,  SCHEIBITZ WOLFGANG ,  TETZLAFF HERIBERT ,  WOJTECH BERNHARD

IPC: C07C17/38 ,  C01B7/07 ,  C07C17/00 ,  C07C19/01 ,  C07C19/04 ,  C07C19/041 ,  C07C19/08 ,  C07C67/00

Abstract: A process is disclosed for the separation of halogenated hydrocarbons from concentrated hydrochloric acid, which contains 10 to 37% by weight of hydrogen chloride. The hydrochloric acid is freed from the halogenated hydrocarbons in an extraction with paraffins having more than 7 carbon atoms, or with paraffin waxes having dropping points from 70 DEG to 160 DEG C. or with paraffin/paraffin wax mixtures, preferably in a continuous counterflow extraction or cross-flow extraction.

公开(公告)号：CA2007101C

公开(公告)日：1997-09-23

申请号：CA2007101

申请日：1990-01-04

Applicant: HOECHST AG

Inventor： TETZLAFF HERIBERT ,  LORK WINFRIED ,  ERPENBACH HEINZ ,  GOEDICKE EITEL

IPC: B01J38/00 ,  B01J31/40 ,  B01J38/04 ,  C07B61/00 ,  C07C27/00 ,  C07C27/26 ,  C07C51/12 ,  C07C51/373 ,  C07C51/42 ,  C07C51/54 ,  C07C51/56 ,  C07C51/573 ,  C07C53/08 ,  C07C53/12 ,  C07C67/37 ,  C07C69/16

Abstract: In a process for the purification and recovery of the contaminated solution of catalyst produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether and containing carbonyl complexes of rhodium, organic and/or inorganic promoters, undistillable organic impurities and acetic acid, acetic anhydride and ethylidene diacetate, the organic impurities and acetic acid, acetic anhydride and ethylidene diacetate are removed from the contaminated solution of catalyst by extraction at pressures from 35 to 450 bar and temperatures from 0 to 120.degree.C with a liquefied or supercritical gas, and the phase of the liquefied or supercritical gas is separated from the purified, promoter-containing catalyst solution, the phase of the liquefied or supercritical gas is separated by flash vaporization, the recovered gas is re-employed for extraction, acetic acid, acetic anhydride and ethylidene diacetate are separated off from the component which remains liquid, and are combined with the purified catalyst complex to prepare fresh catalyst solution and, finally, the organic impurities remaining as the residue on separation of the phase of the liquefied or supercritical gas is purged.