公开(公告)号：DE3070173D1

公开(公告)日：1985-03-28

申请号：DE3070173

申请日：1980-10-16

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR ,  TOWAE FRIEDRICH DR ,  HARDER WOLFGANG DR

IPC: C07C67/00 ,  C07C241/00 ,  C07C265/12 ,  C07C265/14 ,  C07C271/06 ,  C07C118/00 ,  C07C119/048 ,  C07C125/073 ,  C07C125/075

Abstract: A process for the production of mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates comprising the steps of A. reacting aniline and an O-alkyl carbamate to form N-phenylurethanes; B. isolating the N-phenylurethanes; C. condensing, in the presence of an acid, the N-phenylurethanes with formaldehyde or bifunctional compounds having the formula X-CH2-X in which X stands for a RO-, RS- or ROCO radical and R denotes an alkyl radical, to form mixtures of methylene bis(phenylurethanes) and polymethylene polyphenylurethanes; D. cleaving the mixtures of methylene bis(phenylurethanes) and polymethylene polyphenylurethanes at temperatures of 175 DEG C. to 600 DEG C.; and E. isolating the mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanate resulting from step D.

公开(公告)号：DE3164363D1

公开(公告)日：1984-08-02

申请号：DE3164363

申请日：1981-03-04

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR

IPC: C07D307/32 ,  C07D315/00

Abstract: A process for the preparation of a butyrolactone of the general formula I where R1 is unsubstituted or substituted alkyl or phenyl and R2 to R6 are hydrogen or unsubstituted or substituted alkyl or phenyl, wherein a gamma -formylcarboxylic acid ester of the formula II where R is lower alkyl, is treated with oxygen at an elevated temperature of 60 DEG -150 DEG C.

公开(公告)号：DE3248018A1

公开(公告)日：1984-06-28

申请号：DE3248018

申请日：1982-12-24

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR ,  TOWAE FRIEDRICH DR ,  HELLBACH HANS

IPC: C07C263/04 ,  C07C265/04 ,  C07C119/042 ,  C07C118/04

Abstract: The invention relates to a process for the preparation of hexamethylene 1,6-diisocyanate and/or isomeric aliphatic diisocyanates containing 6 carbon atoms in the alkylene radical, preferably 2-methylpentamethylene 1,5-diisocyanate and/or 2-ethyltetramethylene 1,4-diisocyanate, by thermal cleavage (pyrrolysis, thermolysis) of the corresponding dialkylurethanes in the gas phase under reduced pressure, preferably from 0.1 to 100 mbar, at temperatures of above 300 DEG C, preferably 310 to 480 DEG C, in the presence of hydrogen halides and/or hydrogen halide donors which form hydrogen halide under reaction conditions, where the hydrogen halide concentration during the cleavage is from 0.001 to 1.0 mol %, based on dialkylurethanes.

公开(公告)号：DE3233310A1

公开(公告)日：1984-03-08

申请号：DE3233310

申请日：1982-09-08

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR ,  TOWAE FRIEDRICH DR

IPC: C07D295/13 ,  C07D295/14 ,  C07C125/065 ,  C07D295/08 ,  C07D295/10 ,  C07D295/12

公开(公告)号：DE3227748A1

公开(公告)日：1984-01-26

申请号：DE3227748

申请日：1982-07-24

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR ,  TOWAE FRIEDRICH DR ,  HELLBACH HANS

IPC: C07C265/14 ,  C07C67/00 ,  C07C241/00 ,  C07C263/04 ,  C07C265/04 ,  C07C119/042 ,  C07C118/00

Abstract: To prepare hexamethylene diisocyanate, hexamethylene dialkyl urethanes are evaporated at temperatures from 220 to 300 DEG C, advantageously under reduced pressure, without decomposition, the vapours are subsequently cleaved thermally in the gas phase at temperatures above 300 DEG C and under a pressure of 0.1 to 100 mbar, and the cleavage products are subjected to fractional condensation, the first condensation step giving mostly hexamethylene diisocyanate and the second condensation step giving the alcohol.

公开(公告)号：CH599088A5

公开(公告)日：1978-05-12

申请号：CH784776

申请日：1976-06-18

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  JACOBSEN THEODOR DR ,  EILINGSFELD HEINZ DR ,  MIESEN ERNEST ,  NESTLER GERHARD DR

IPC: C07C46/00 ,  C07C49/68 ,  C07C49/735

公开(公告)号：MY122671A

公开(公告)日：2006-04-29

申请号：MYPI20000588

申请日：2000-02-18

Applicant: BASF AG

Inventor： THIEL JOACHIM DR ,  SCHRODER JURGEN DR ,  NESTLER GERHARD DR

IPC: B01D5/00 ,  B01D47/14 ,  B01D3/14 ,  B01D3/16 ,  B01D3/20 ,  B01D3/22 ,  B01D3/26 ,  B01D3/32 ,  C07C51/43 ,  C07C51/44 ,  C07C51/487 ,  C07C51/50 ,  C07C57/05 ,  C07C57/055 ,  C07C57/07 ,  C07C57/075

Abstract: IN A PROCESS FOR THE FRACTIONAL CONDENSATION OF AN ACRYLIC ACID-CONTAINING PRODUCT GAS MIXTURE (1) OF A GAS-PHASE PARTIAL OXIDATION OF C3 PRECURSORS OF ACRYLIC ACID WITH MOLECULAR OXYGEN UNDER HETEROGENEOUS CATALYSIS, THE SEPARATION COLUMN (3) USED CONTAINS BOTH DUAL-FLOW TRAYS AND HYDRAULICALLY SEALED CROSS-FLOW TRAYS AS BAFFLES HAVING SEPARATION ACTIVITY. FIG/ 1

公开(公告)号：MY120799A

公开(公告)日：2005-11-30

申请号：MYPI9901219

申请日：1999-03-31

Applicant: BASF AG

Inventor： BOLZ GERHARD DR ,  NESTLER GERHARD DR ,  SCHRODER JURGEN DR

IPC: C07C51/16 ,  C07C51/21 ,  C07C51/25 ,  C07C51/44 ,  C07C57/05 ,  C07C57/07 ,  C07C67/08 ,  C07C69/54

Abstract: A PROCESS FOR PREPARING ACRYLIC ACID AND/OR ACRYLATES, WHICH COMPRISES STAGE A WITH OR WITHOUT STAGES B AND C:A: COOLING A GASEOUS REACTION MIXTURE WHICH COMPRISES ACRYLIC ACID AND IS OBTAINED IN THE GAS-PHASE OXIDATION TO PREPARE ACRYLIC ACID, USING AN INERT HIGH-BOILING SOLVENT, TO GIVE A GASEOUS MIXTURE COMPRISING ACRYLIC ACID;B: SEPARATING THE GASEOUS MIXTURE COMPRISING ACRYLIC ACID TO GIVE A LOW-BOILING FRACTION, A CRUDE ACRYLIC ACID, AND A BOTTOM PRODUCT,ANDC: ESTERIFYING THE CRUDE ACRYLIC ACID OBTAINED IN STAGE B BY MEANS OF ONE OR MORE ALKANOLS TO GIVE AN ESTERIFICATION MIXTURE COMPRISING ONE OR MORE ACRYLATES AND ONE OR MORE ACETIC ESTERS.

公开(公告)号：DE19746688A1

公开(公告)日：1999-04-29

申请号：DE19746688

申请日：1997-10-22

Applicant: BASF AG

Inventor： AICHINGER HEINRICH DR ,  HERBST HOLGER DR ,  NESTLER GERHARD DR ,  SCHROEDER JUERGEN DR

IPC: B08B3/08 ,  C07C67/03 ,  C07C67/04 ,  C07C67/08 ,  C07C67/48 ,  C07C69/54 ,  C11D7/06 ,  C11D11/00

Abstract: The process comprises (a) emptying the parts; (b) washing them with aqueous 5-50 wt.% alkali hydroxide solution; (c) emptying; (d) optionally rinsing with water; and (e) optionally drying. An Independent claim is also included for the use of alkali hydroxides for this purpose.

公开(公告)号：ES2122724T3

公开(公告)日：1998-12-16

申请号：ES96100052

申请日：1996-01-04

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  HAMMON ULRICH DR

IPC: C07C57/04 ,  C07C51/44 ,  C07C57/05 ,  C07C57/07

Abstract: In the sepn. of (meth)acrylic acid (I) from mixts. by rectification, in which (I) is discharged from the column at a point higher than the inlet for the mixt., the refluxing liq. is removed in at least one position of the column, the oligomerised and/or polymerised (I) is sepd. and the liq. is recycled to the column.