公开(公告)号：DE59900446D1

公开(公告)日：2002-01-10

申请号：DE59900446

申请日：1999-03-05

Applicant: BASF AG

Inventor： RUFF DR ,  BURST WOLFRAM ,  KAISER DR ,  STROEZEL MANFRED

IPC: C07C45/72 ,  C07C45/74 ,  C07C49/603

Abstract: 2,5,6-trimethyl-cyclohex-2-en-1-one (I) is prepared by continuously pumping diethylketone (II), crotonaldehyde (III) and an aqueous strong base through a pressure vessel in such a fashion that the reaction temperature is 150-350 degrees C and the average residence time in the pressure vessel is only 0.1 seconds to 20 minutes. Preparation of 2,5,6-trimethyl-cyclohex-2-en-1-one (I) comprises reaction of (i) diethylketone (II) with (ii) crotonaldehyde (III) (or a compound which is converted to (III) under the selected reaction conditions), in the presence of basic agents, at elevated temperatures. Component (ii) (1 mol), component (i) (5-30 mol) and an aqueous solution or suspension of a strong base are pumped continuously, via separate supply points or in the form of a mixture, into an optionally heated pressure vessel which can guarantee intensive mixing. The components are pumped to the vessel in such a fashion that the reaction temperature is 150-350 degrees C and the average residence time in the pressure vessel is only 0.1 seconds to 20 minutes.

公开(公告)号：DE50005399D1

公开(公告)日：2004-04-01

申请号：DE50005399

申请日：2000-09-21

Applicant: BASF AG

Inventor： SCHEIN DR ,  BALDENIUS DR ,  SIEGEL DR ,  STUERMER DR ,  RUFF DR ,  JAEDICKE DR

IPC: C07B61/00 ,  C07C45/46 ,  C07C49/825 ,  C07C67/42 ,  C07C69/017 ,  C07C69/16

Abstract: Preparation of monoacetylated hydroquinone compound comprises reacting a dicetylphenol compound with peroxo compounds optionally using an acid in one reaction step. Preparation of monoacetylated hydroquinone compound of formula (I) comprises reacting a dicetylphenol compound of formula (II) with peroxo compounds optionally using an acid. R1-R3 = H or Me. Independent claims are included for: (1) preparation of (II) by reacting phenol compounds of formula (III) with an acetylation agent using an acid catalyst; (2) preparation of monoacetylated hydroquinone compounds (I) by reacting (III) with an acetylation agent using an acid catalyst to give (II) and further reacting with peroxo compounds, optionally in the presence of an acid; and (3) compounds of formula (Ia)-(Ie).

公开(公告)号：DE59904211D1

公开(公告)日：2003-03-13

申请号：DE59904211

申请日：1999-10-05

Applicant: BASF AG

Inventor： RUFF DR ,  BAUMANN DIETER ,  AQUILA DR ,  SCHUBERT DR ,  LECHTKEN DR

IPC: B01J31/22 ,  C07B61/00 ,  C07C46/08 ,  C07C46/10 ,  C07C50/02 ,  C07C50/04

Abstract: Purification of 2,3,5-trimethyl-p-benzoquinone (TMQ) or isolation of TMQ from a mixture, by crystallization. An Independent claim is included for preparation of TMQ by catalytic oxidation of TMP with oxygen to give a mixture containing TMQ as well as TMP and/or at least 1 of solvent, catalyst-residue, by-product and intermediate, followed by work-up as above.