Process for the preparation of urethanes
AssigneeBayer Aktiengesellschaft
InventorsRobert Becker, Johann Grolig, Christian Rasp
Life of this patent
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Abstract
A process for producing urethanes by reacting primary amines, carbon monoxide and organic hydroxyl compounds in the presence of molecular oxygen and/or organic nitro compounds as oxidizing agents and a catalyst system comprising a noble metal and/or a compound of a noble metal of the 8th subgroup of the Periodic System of Elements and a compound capable of undergoing Redox reactions under reaction conditions of the 3rd to 5th main group and/or 1st to 8th subgroup of the Periodic System of Elements.
Claims9
A heat efficient process for the preparation of urethanes comprising reacting primary amines with carbon monoxide and organic compounds having at least one hydroxyl group in the presence of
- (a) molecular oxygen as oxidizing agent,
- (b) a noble metal and/or a compound of a noble metal of the 8th subgroup of the Periodic System of Elements, and
- (c) a compound of an element of the 3rd to 5th main group and/or 1st to 8th subgroup of the Periodic System of Elements, said compound being capable of undergoing Redox reactions under the reaction conditions.
A heat efficient process for the preparation of urethane comprising reacting primary amines with carbon monoxide and organic compounds having at least one hydroxyl group in the presence of
- (a) molecular oxygen and/or organic nitro compounds as oxidizing agents, in an amount such that when an organic nitro compound is used as the oxidizing agent, the molar ratio of primary amine to nitro compound is at least 1.1 to 1,
- (b) a noble metal and or a compound of the noble metal of the 8th subgroup of the Periodic System of Elements, and
- (c) an oxychloride of elements of the 3rd to 5th main group or 1st to 8th subgroup of the Periodic System of Elements capable of undergoing Redox reaction under reaction conditions.
A heat efficient process for the preparation of urethanes comprising reacting primary amines with carbon monoxide and organic compounds having at least one hydroxyl group in the presence of
- (a) molecular oxygen and/or organic nitro compounds as oxidizing agent,
- (b) a noble metal and/or a compound of a noble metal of the 8th subgroup of the Periodic System of Elements, and
- (c) mixtures of (1) oxides and/or hydroxides of elements of the 3rd to 5th main group and 1st to 8th subgroup of the Periodic System of Elements capable of undergoing Redox reactions under reaction conditions in combination with (2) compounds containing chlorine bound anionically in the form of chloride suitable for activating said oxides and/or hydroxides under said reaction conditions forming chloride.
Dependencies are inferred from the claim text.