Process for the preparation of urethane
AssigneeBayer Aktiengesellschaft
InventorsRobert Becker, Johann Grolig, Christian Rasp, Gunter Stammann
Life of this patent
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Abstract
Production of urethanes by the oxycarbonylation reaction of N,N'-disubstituted ureas and organic compounds containing at least one hydroxyl group with carbon monoxide in the presence of molecular oxygen and/or organic nitro compounds and a catalyst system comprising (a) a noble metal and/or noble metal compound of the eighth subgroup of the periodic system of elements and (b) a compound of an element and/or elements of the third to fifth main group and/or first to eighth subgroup of the periodic system of elements characterized in that said compounds are capable of undergoing Redox reactions under the reaction conditions.
Claims13
A process for the preparation of a urethane comprising reacting an N,N'-disubstituted area with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide and molecular oxygen and a catalyst comprising:
- (a) a noble metal and/or a noble metal compound of the eighth subgroup of the periodic system of elements;
- and
- (b) a compound of an element of the third to fifth main group and/or first to eighth subgroup of the periodic system of elements other than the compounds of group (a) capable of undergoing Redox reactions under the reaction conditions.
A process for the preparation of a urethane comprising reacting a nitro-substituted N,N'-diaryl urea with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide and molecular oxygen with a catalyst comprising:
- (a) a noble metal and/or a noble metal compound of the eighth subgroup of the periodic system of elements;
- and
- (b) a compound of an element of the third to fifth main group and/or first to eighth subgroup of the periodic system of elements other than the compounds of group (a) capable of undergoing Redox reactions under the reaction conditions.
A process for the preparation of a urethane comprising reacting an N,N'-disubstituted urea with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide and molecular oxygen and/or an organic nitro compound and a catalyst comprising:
- (a) a noble metal and/or a noble metal compound of the eighth subgroup of the periodic system of elements;
- and
- (b) an oxychloride of an element of the third to fifth main group or first to eighth subgroup of the periodic system.
A process for the preparation of a urethane comprising reacting an N,N'-disubstituted urea with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide and molecular oxygen and/or an organic nitro compound and a catalyst comprising:
- (a) a noble metal and/or a noble metal compound of the eighth subgroup of the periodic system of elements;
- and
- (b) an oxide and/or hydroxide of an element of the third to fifth main group or first to eighth subgroup of the periodic system in combination with a compound containing chlorine bound anionically as chloride characterized in that the chlorine compound is capable of activating the oxide and/or hydroxide with formation of chloride.
Dependencies are inferred from the claim text.