Basf Aktiengesellschaft

Basf Se Corporation

Rudolf Erich Lorenz

Rolf Pinkos

Arnd B&ouml;ttcher

Michael Steiniger

Gerd Schaefer

Thomas Preiss

Jochem Henkelmann

Thomas Danner

Gerd Kaibel

Harald Rust

Alois Kindler

Manfred Stroezel

Udo Rheude

Herbert Helfert

Sabine Weiguny

Martin Schmidt-Radde

Heike Becker

Melanie Brunner

Christian Tragut

Christian Knoll

J&ouml;rg Heilek

Bernhard Maltry

Melanie Maas-Brunner

Hans-Peter Schildberg

York Alexander Beste

Juan Aiscar

Jihong He

Hansj&ouml;rg Nickel

Gunter Saladin

Gerd Schäfer

The present invention provides an integrated process for continuously preparing 1,4-butanediol, which comprises the following stages:

Process for preparing 1,4-butanediol

The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol.

Method for the separation of polymeric by-products from 1,4-butynediol

The present invention relates to processes for making 1,4-butanediol, 1,4-butenediol, or a mixture thereof by processing 1,4-butynediol in a dynamic mixing apparatus in an inert gas atmosphere at from 25 to 150&#xb0; C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec; phase separating the processed 1,4-butynediol at a temperature of from 25 to 150&#xb0; C.; removing a bottom phase to obtain purified 1,4-butynediol; and reacting the purified 1,4-butynediol with hydrogen in the presence of a catalyst.

The present invention relates to a process for purifying 1,4-butynediol, which comprises processing 1,4-butynediol in a dynamic mixing apparatus in an inert gas atmosphere at from 25 to 150&#xb0; C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec, awaiting phase separation at temperatures of from 25 to 150&#xb0; C. and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol.

A process for preparing at least one unsaturated alcohol (B) comprises the steps (I) to (III) below:

Method for preparing acetylene alcohols and their secondary products

A continuous process for the preparation of O&mdash;, S&mdash; and N-alkenyl compounds by reaction of the corresponding OH, SH or NH compound with an acetylene in the liquid phase in the presence of basic alkali or alkaline earth metal compounds at from 40 to 300&deg; C. and from 0.11 to 5 MPa absolute comprises continuously feeding the corresponding OH, SH or NH compound and the acetylene and operating at a conversion of the corresponding OH, SH or NH compound of &gE;90%.

Continuous preparation of alkenyl compounds

A method of storing and transporting N-vinyl-&egr;-caprolactam is provided wherein the N-vinyl-&egr;-caprolactam is kept in the liquid phase.

Storage and transportation of N-vinyl-epsilon-caprolactam

Method for the production of N-alkenyl-amides

Stabilized composition of O- and N-vinyl compounds and use of ammonium salts as stabilizers

Method for producing a granulate from a melt

Method for producing N-alkenyl amides

A process for purifying N-vinyl-&egr;-caprolactam comprises converting the N-vinyl-&egr;-caprolactam which is to be purified and has a purity of at least 95% by weight into a melt, partially crystallizing the melt and separating the crystals from the mother liquor.

Purification of N-vinyl-&egr;-caprolactam

The invention provides an N-alkenyllactam having at least a 6-membered lactam ring, stabilized by phenothiazine and/or derivatives thereof, and a process for the stabilization of N-alkenyllactams.

Stabilized N-alkenyllactam

A process for purifying alkenyl compounds having a divalent or trivalent heteroatom in the &agr;-position relative to the double bond by distillation comprises carrying out at least two distillations in which the purified alkenyl compounds are obtained from the gas phase by condensation, where the time between the first distillation after the synthesis of the alkenyl compounds and at least one further distillation is at least one day and the purified alkenyl compounds have an APHA color number of <30.

Purification of alkenyl compounds

Growing community of inventors

Ludwigshafen, Germany

Rudolf Erich Lorenz