Basf Aktiengesellschaft

Aktiengesellschaft

Franz Josef Brocker

Rolf Hartmuth Fischer

Gerd Kaibel

Klemens Flick

Manfred Stroezel

Peter Trubenbach

Rainer Becker

Uwe Dingerdissen

Christoph Sigwart

Alfred Hagemeyer

Peter Stops

Volkmar Menger

Gunter Lauth

Peter Lingelbach

Jochem Henkelmann

Rolf Pinkos

Michael Hesse

Ekkehard Schwab

Wolfgang Harder

Boris Breitscheidel

Norbert Rieber

Georg Heinrich Grosch

Michael Schulz

Thomas Ruhl

Andreas Henne

Udo Rheude

Werner Aquila

Wolfgang Reif

Manfred Baumann

Hartwig Fuchs

Gerald Meyer

Cristina Freire Erdbrugger

Christof Herion

Karl Heinz Brauch

Robert Markl

Jurgen Schubert

Process for dehydrogenating secondary cyclic alcohols

The invention relates to a process for the selective liquid-phase hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds of the formula I, ##STR1## where R.sub.1 is hydrogen or an organic radical, and R.sub.2, R.sub.3 and R.sub.4, independently of one another, are hydrogen or a C.sub.1 -- to C.sub.4 --alkyl group, to saturated carbonyl compounds of the formula II ##STR2## using hydrogen in the presence of a pulverulent palladium and/or rhodium catalyst and in the presence of an organic base. The process is carried out in a packed bubble column reactor (1, 2) with product recycling (11, 17) and circulating hydrogen gas (4, 15, 16). It is particularly suitable for the selective hydrogenation of citral to citronellal.

Selective liquid-phase hydrogenation of .alpha.,.beta.-unsaturated

Gauze catalyst based on titanium or vanadium zeolites and inert gauze

A process for preparing 1,2-butylene oxide by catalytic hydrogenation of vinyloxirane over a heterogeneous catalyst comprises using a catalyst comprising an element of subgroup I, VII or VIII of the periodic table, or mixtures of a plurality of these elements, in the presence or absence of one or more promoter elements, these elements and promoters having been applied by means of a vacuum vapor deposition technique to a support of metal foil or metal wire fabric.

Preparation of 1,2-butylene oxide

Process for hydrogenation of dihydrofurans to give tetrahydrofurans

Catalytic reactions are carried out in a reactor which contains a liquid phase in which at least one catalyst is suspended, and which may additionally contain a gas phase, by a process in which the liquid phase and, if present, also the gas phase are fed, at least partly, through an apparatus having orifices or channels in the reactor, the hydraulic diameter of which orifices or channels is from 0.5 to 20 mm, preferably from 1 to 10 mm, particularly preferably from 1 to 3 mm.

Process and reactor for carrying out conversion with catalysts suspended

Monomodal or polymodal catalyst supports or catalysts having a BET specific surface area of from 0.01 to 250 m.sup.2 /g and a monomodal or polymodal pore size distribution having a mean pore diameter of from 50 to 300,000 nm measured by the mercury pressure porosimetry method, wherein

Monomodal and polymodal catalyst supports and catalysts having narrow

A process for reacting an organic compound in the presence of a catalyst, wherein the catalyst comprises a homogeneous ruthenium compound or a mixture of two or more thereof deposited in situ on a support.

Process for reacting an organic compound in the presence of a ruthenium

In a process for the hydrogenation of multiply unsaturated C.sub.2 -C.sub.8 hydrocarbons, in particular C.sub.2 -C.sub.8 -alkynes and/or C.sub.4 -C.sub.8 -alkynenes and/or C.sub.4 -C.sub.8 -alkadienes in fluids comprising these by contact with a catalyst packing in the presence of free hydrogen, the catalyst packing can be produced by applying at least one substance which is active as catalyst and/or promoter to woven or knitted meshes or foils as support material.

Hydrogenation process

A process for the preparation of alkylphenols of the formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 stand for hydrogen or C.sub.1 -C.sub.8 alkyl, by reaction of an alkylcyclohex-2-en-1-one of the formula II ##STR2## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 have the aforementioned meanings, at temperatures of from 200.degree. to 400.degree. C. and pressures ranging from 0.01 to 50 bar in the presence of palladium-on-.alpha.-Al.sub.2 O.sub.3 catalysts, wherein the catalyst used has a specific surface area (BET) of from 1 to 10 m.sup.2 /g, a pore diameter of from 5 nm to 300 .mu.m and a pore volume of from 0.1 to 0.5 cm.sup.3 /g, from 80 to 100% of the pores having a diameter of from 40 to 400 nm, and also novel palladium-on-.alpha.-Al.sub.2 O.sub.3 catalysts as obtained from a fine-grained alumina powder by steps of molding, pyrolysis and calcination.

Preparation of alkylphenols

Alkenes are prepared by partial hydrogenation of alkynes in the liquid phase over palladium catalysts by a process which comprises

Preparation of alkenes by partial hydrogenation of alkynes over

Catalyst and process for the preparation of butene-2-diol-1,4 by the hydrogenation of butyne-2-diol-1,4 in aqueous solution over a palladium-containing fixed-bed catalyst, which is doped with lead or cadmium, in which a catalyst is used which has been made by applying Pd and Pb or Pd and Cd successively, by vapor deposition or sputtering, to a metal gauze or a metal foil acting as support material followed by forming the catalyst at an elevated temperature in air.

Process for the selective hydrogenation of butyne-1,4-diol to

Palladium-containing fixed-bed catalyst for the hydrogenation of

Growing community of inventors

Ludwigshafen, Germany

Franz Josef Brocker