Basf Aktiengesellschaft

Lothar Franz

Knut Oppenlaender

Juergen Thomas

Juergen Mohr

Peter Schreyer

Wolfgang Guenther

Wolfgang Franzischka

Alexander Weck

Heinz Auer

Manfred Eggersdorfer

Volkmar Menger

Werner Weinle

Ulrich-Dieter Pessel

Klaus Beiser

Eberhard Ammermann

Hubert Sauter

Rolf Hartmuth Fischer

Ernst-Heinrich Pommer

Michael Hesse

Rainer Becker

Walter Denzinger

Wolfgang Harder

Rudolf Kummer

Bernd Lothar Marczinke

Gerd Rehmer

Christoph Sigwart

Klaus Halbritter

Roger G Klimesch

Gerhard Auchter

Andreas Boettcher

Siegfried Winderl

Peter Stops

Wolfgang Reif

Frank-Friedrich Pape

Dieter Voges

Michael Roeper

Gabriele Iffland

Anton Meier

Axel Paul

Michael Zirnstein

Hermann Graf

Karl Siegfried Brenner

Hans-Joachim Mueller

Horst Zimmermann

Hans-Juergen Gosch

Philipp Eisenbarth

Michael Huellmann

Wolfgang Sauer

Klaus-Peter Pfaff

Christof Palm

Klaus-Dieter Malsch

Helmut Jaeger

Hans-Juergen Scheiper

Marion Meyer

Arthur Höhn

Wulfrich Friedemann Beer

J&uuml;rgen Ciprian

Johan H Hendrick Ter Maat

In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number, the polymers obtained by cationic polymerization of tetrahydrofuran are hydrogenated in the presence of a macroporous, supported heterogeneous catalyst comprising at least one metal of groups 7 to 10 of the Periodic Table of the Elements as active metal.

Method for the production of polytetrahydrofuran with low color index

The present invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of an alkali metal- or alkaline earth metal-containing catalyst, which entails the appropriate acyloxy-containing polymer being introduced together with the alcohol and the catalyst into a first prereactor (I) and converted therein at least partly to the hydroxyl-containing polymer, and the reaction solution being fed into the upper zone (IIa) of a distillation column (II) into whose lower zone (IIb) alcohol in vapor phase is additionally fed. This involves a phase exchange at the coherent and the disperse phase at the transition from the prereactor to the distillation column. Preferably, in addition to the first prereactor, a further 3 prereactors are used which serve as holdup reactors.

Production of polytetrahydrofuran with terminal hydroxyl groups by changing the continuous and dispersed phase

Mixtures of at least one amine, polyamine or alkanolamine and at least one polyetheramine and their use as additives for gasoline engine fuels.

Mixtures suitable as fuel additives

The invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding acyloxy-containing polymers by transesterification with alcohols in the presence of a sodium-containing catalyst. In this process the polytetrahydrofuiran solution is passed in the presence of a catalytic amount of water directly through at least one ion exchanger following the transesterification in order to remove the sodium cations. The novel process makes it possible to remove the sodium cations from the sodium-containing catalyst in an economic manner and with little complexity. The residual sodium content can be reduced to values of less than 0.5 ppm.

Preparation of polytetrahydrofuran with terminal hydroxyl groups using

A process for preparing hydroxyl-containing polymers and, in particular, a process for preparing polytetrahydrofuran with terminal hydroxyl groups from the corresponding acyloxy-containing polymers by transesterification with alcohols is carried out continuously in at least one stirred vessel, with the foam produced in the transesterification being fed tangentially to a cylindrical container, preferably a cyclone separator, at an adequate velocity to destroy the foam. The liquid phase which separates out is recycled through a line to the at least one stirred vessel. This continuous process is preferably carried out in a cascade of stirred vessels, in which each stirred vessel or a subunit of at least two stirred vessels can in each case be coupled to a cylindrical container, preferably in the form of a cyclone separator.

Continuous preparation of polytetrahydrofuran by a transesterification

A process for preparing piperid-2-one by reacting polymers of delta-valerolactone having a molecular weight of from 200 to 20,000 with ammonia under an inert atmosphere at temperatures of from 250 to 500.degree. C. and pressures of from 30 to 500 bar in valerolactone or in an inert solvent thereby avoiding the use of any special catalyst.

Preparation of piperid-2-one

Poly-1-n-alkenylamines, and fuel and lubricant compositions containing

Halogen-free fuel additives based on a long-chain hydrocarbon having a polar terminal group are obtained by reacting a hydroformylated olefin with a polyamine and hydrogenating the reaction product.

Fuel additives, their preparation and gasoline engine fuels containing

A process for the preparatiion of an amine which comprises reacting a primary or secondary alcohol and a nitrogen compound selected from the group consisting of ammonia and primary and secondary amines, at temperatures of from 80.degree. to 250.degree. C. and pressures of from 1 to 400 bar using hydrogen in the presence of a zirconium/copper/nickel catalyst, wherein the catalytically active material contains from 20 to 85 wt % of oxygen-containing zirconium compounds, calculated as ZrO.sub.2, from 1 to 30 wt % of oxygen-containing compounds of copper, calculated as CuO, from 30 to 70 wt % of oxygen-containing compounds of nickel, calculated as NiO, from 0.1 to 5 wt % of oxygen-containing compounds of molybdenum, calculated as MoO.sub.3 and from 0 to 10 wt % of oxygen-containing compounds of aluminum and/or manganese, calculated as Al.sub.2 O.sub.3 or MnO.sub.2, respectively.

Preparation of amines

.beta.-Aminonitriles of the following formula I ##STR1## where R.sup.1 is an aliphatic hydrocarbon radical having alkyl side groups and a number average molecular weight of from 250 to 5,000 and R.sup.2, R.sup.3 and R.sup.4, independently of one another, are each hydrogen or C.sub.1 -C.sub.8 -alkyl and R.sup.2 or R.sup.4 is also phenyl, and alkylpropylenediamines prepared from the .beta.-aminonitriles by hydrogenation are used as additives in fuels and lubricants.

.beta.-aminonitriles and N-alkyl-1,3-propylenediamines and their use as

Alkoxylation products which are suitable as dispersants and are of the general formula I ##STR1## where A is oxygen or --CO--O-- when x and y are each 1 or is nitrogen when x+y=3,

Alkoxylation products

Process for the preparation of N-alkenylpyrrolidones of the general formula ##STR1## in which R denotes hydrogen or C.sub.1 -C.sub.20 alkyl, by the reaction of an N-alkylpyrrolidone of the general formula ##STR2## in which R has the aforementioned meanings, and x and Y stand for OH, C.sub.1 -C.sub.20 alkoxy or C.sub.2 -C.sub.20 alkoxycarbonyl, provided that one of the two radicals x and denotes hydrogen, at temperatures ranging from 200.degree. to 600.degree. C. and pressures ranging from 0.1 to 5 bar, wherein the process is carried out in the presence of an acid heterogenous catalyst except for an oxide of a Group IIb, Group IIIb, Group IVb, and Group VIb metal.

Preparation of N-alkenylpyrrolidones

Fuels for internal combustion engines or lubricants contain small amounts of compounds of the formulae Ia and/or Ib ##STR1## where R is an aliphatic hydrocarbon radical having a number average molecular weight of from 250 to 5,000 and X is ##STR2## where the radicals R.sup.1 may be identical or different and are each hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.8 -hydroxyalkyl or C.sub.1 -C.sub.8 -aminoalkyl, or where the two radicals R.sup.1 may form a nonaromatic ring.

Diaminoalkanes, their preparation and fuels and lubricants containing

The invention relates to UV-crosslinkable copolymers built up from

UV-crosslinkable copolymers

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Mutterstadt, Germany

Lothar Franz