Abstract:
The invention relates to a method for producing a ketone, especially cyclododecanone, whereby cyclododecatriene is reacted with dinitrogen monoxide thereby obtaining cyclododecadienone and hydrating the cyclododecadienone obtained especially to give cyclododecanone.
Abstract:
The invention relates to a method for producing cyclododecanone by reacting cyclododecen with dinitrogen, especially a method comprising steps (I) and (II): (I) producing cyclododecen by partially hydrating cyclododecatriene; (II) reacting the cyclododecen obtained in step (I) with dinitrogen monoxide, thereby obtaining cyclododecanone.
Abstract:
The invention relates to tertiary divinyl ethers of formula (I), wherein R , R , R , R independently represent: C1 - C20 alkyl, respectively unsubstituted or substituted by alkyl or cycloalkyl; cycloalkyl containing 3 - 6 ring-C-atoms, respectively unsubstituted or substituted by alkyl or cycloalkyl; phenyl, unsubstituted or substituted by alkyl or cycloalkyl; or R and R or R and R jointly represent C2-C11 alkylene, respectively unsubstituted or substituted by alkyl or cycloalkyl. R , R independently represent: hydrogen; C1-C20 alkyl, respectively unsubstituted or substituted by alkyl or cycloalkyl; cycloalkyl containing 3 - 6 ring-C-atoms, respectively unsubstituted or substituted by alkyl or cycloalkyl; phenyl, unsubstituted or substituted by alkyl or cycloalkyl and X represents alkylene containing 1 - 12 CH2-groups. The invention also relates to the production and use of said tertiary divinyl ethers.
Abstract:
A process for preparing xylylenediamine by continuously hydrogenating liquid phthalonitrile over a heterogeneous catalyst in the presence of liquid ammonia in a reactor, which comprises mixing a stream of a phthalonitrile melt in liquid form by means of a mixer unit with a stream of liquid ammonia and conducting the liquid mixture into the hydrogenation reactor.
Abstract:
The invention relates to a method for the production of diaminoxylene, by continuous hydrogenation of liquid phthalonitrile, on a heterogeneous catalyst, in the presence of liquid ammonia, in a reactor, whereby a part of the reactor product is continuously recycled to the reactor feed as a liquid recycle stream (recirculating loop). A flow of fused phthalonitrile is added as a liquid to the recycle stream around the hydrogenation reactor in a mixing device, whereby the phthalonitrile conversion in the reactor on a single pass is greater than 99 % and the recycle stream comprises more than 93 % by weight of liquid ammonia and diaminoxylene and contains no further solvent for phthalonitrile.
Abstract:
Preparation of beta -aminopropionic acid derivatives by reacting primary/secondary amine with an acrylic acid derivative, comprises reacting first primary or secondary amine with acrylic acid derivative to obtain a first beta -aminopropionic acid derivative and unreacted acrylic acid derivative; and completely reacting the unreacted acrylic acid derivative with a second secondary amine to obtain a second beta -aminopropionic acid derivative, where the reaction mixture contains beta -aminopropionic acid derivative and unreacted secondary amine. Preparation of beta -aminopropionic acid derivatives by reacting a primary/ secondary amine with an acrylic acid derivative, comprises reacting first primary or secondary amine as value amine with acrylic acid derivative to obtain reaction mixture containing a first beta -aminopropionic acid derivative as an end product in addition with unreacted acrylic acid derivative, where the amount of the acrylic acid derivative is large, when compared with the value amine; and completely reacting the unreacted acrylic acid derivative with a second secondary amine as a trapping amine to obtain a second beta -aminopropionic acid derivative, where the reaction mixture contains first beta -aminoproionic acid derivative as end product, second beta -aminopropionic acid derivative and unreacted secondary amine.
Abstract:
A PROCESS FOR PREPARING BUTYROLACTONES OF THE GENERAL FORMULA I WHERE THE SUBSTITUENTS RL AND R2 ARE HYDROGEN, ALKYL, HYDROXYALKYL, OR ARYL AND TRIALKYLSILYL GROUPS WHICH MAY HAVE INERT SUBSTITUENTS, COMPRISES REACTING AN ALKYNE OF THE GENERAL FORMULA II WHERE THE SUBSTITUENTS HAVE THE ABOVEMENTIONED MEANINGS, CARBON MONOXIDE CO AND HYDROGEN IN THE PRESENCE OF A TRANSITION METAL CATALYST UNDER ELEVATED PRESSURE.