Basf Aktiengesellschaft

Basf Se Corporation

Michael Fried

Gerhard Nestler

Heinrich Aichinger

Albrecht Dams

Karl Gerhard Baur

Ludwig Zuern

Ulrich Annen

Herbert Exner

Erhard Stahnecker

Ulrich Rauh

Paul Leon Kageler

Lawrence Edwin James

A supply system for feeding a fluid to a vessel ( ) is described, which is provided with a feedline ( ), having a reservoir which is filled with the fluid and a compressed-gas store ( ) which can be brought into communication with this reservoir ( ), in which system the reservoir ( ) and the compressed-gas store ( ) are arranged in immediate proximity to one another, and wherein the reservoir ( ) can, when required, be brought into communication with the feedline ( ) via connection pieces ( ).

Supply system for transferring a fluid to a container

Method for producing (meth) acrylic acid esters

An apparatus for introducing a fluid into a container includes a supply leading into the interior of the container, closed by a bursting disk and connected to a supply line for the fluid. In order to increase the operational safety and to avoid clogging of the bursting disk, the supply is in the form of a telescopic tube which can be extended by the pressure of the fluid into the interior of the container and is mounted above the highest level in the container.

Device for feeding a fluid into a container

Free radical polymerizations are immediately terminated by adding a phenothiazine-containing solution whose solvent comprises at least 50% of its weight of an N-alkylpyrrolidone.

Immediate termination of free radical polymerizations

The disclosure is a process for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C,-C,-alkanols in the presence of a strong inorganic acid or of a C,-C,-monoalkyl ester of a polybasic strong acid as catalyst, which comprises removing the unconverted alkanol from the resulting reaction mixture by distillation and thereafter removing the catalyst from the resulting mixture.

Method for producing (meth)acrylic acid esters

A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C,-C,-alkanols in the presence of sulfuric acid or a mono-C,-C,-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.

Method for the production of (meth)acrylic acid esters

In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and the (meth)acrylate to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off, the oxyesters contained therein are then separated off by distillation and the resulting distillate is cleaved in the presence of acids at elevated temperatures. The process can be carried out in the presence of molecular oxygen. The distillate is cleaved at from 170.degree. to 250.degree. C., preferably from 180.degree. to 230.degree. C.

Esterification of (meth)acrylic acid with an alkanol

A process for the preparation of C.sub.1 -C.sub.4 -alkyl esters of (meth)acrylic acid from esters of the formula I ##STR1## and in case from esters of the formula (II) ##STR2## where R.sup.1 is hydrogen or --CH.sub.3,

Preparation of alkyl esters of (meth)acrylic acid

A process for the manufacture of cross-linked foamable moldings from olefin polymers, wherein the olefin polymer is mixed with

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Heidelberg, Germany

Michael Fried