Bayer Aktiengesellschaft

Frank Dobert

Paul Wagner

Winfried Joentgen

Torsten Groth

Alexander Klausener

Hans-Georg Pirkl

Thomas Menzel

Thomas Roick

Klaus-Peter Heise

Ursula Pentling

Bernd-Michael Konig

Eckhard Wenderoth

Joergen Weinschenck

Preparation and use of iminodisuccinic acid salts

3-Methoxy-1-propanol is prepared in an advantageous manner by alkylating 1,3-propanediol with methyl chloride in the presence of a base.

Process for preparing 3-methoxy-1-propanol

Polymers having recurring succinyl units are obtained by an improved process by reaction of A, an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof, with B, a nitrogen-donating compound, in a first reaction step to give a reaction mixture comprising at least one low molecular weight reaction product, and subsequent continuous feeding of the reaction mixture into a continuously operated reactor to give the polymer in a second reaction step. In a further embodiment the invention refers to polymers having recurring succinyl units prepared by reaction of an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof with a nitrogen-donating compound in a first reaction step and subsequent feeding of the reaction mixture, without intermediate isolation, into an optionally continuously operated reactor, with removal of water, and treatment of the reaction mixture at a temperature of 140 to 350.degree. C.

Process for the preparation of polymers having recurring agents

Polymers with recurring succinyl units are prepared by reaction of maleic anhydride, maleic acid or fumaric acid with condensed liquid ammonia and polymerization of the resulting reaction product.

Process for the preparation of polymers with recurring succinyl units

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Koln, Germany

Frank Dobert