| Patent application number | Description | Published |
|---|
| 20080200711 | PROCESS FOR THE PREPARATION OF AN ALKANEDIOL AND A DIALKYL CARBONATE - An alkanediol and a dialkyl carbonate are prepared in a process comprising: | 08-21-2008 |
| 20080200712 | PROCESS FOR THE PREPARATION OF DIARYL CARBONATE - The invention relates to a process for the preparation of a diaryl carbonate by transesterification of an aromatic alcohol with a dialkyl carbonate in the presence of a transesterification catalyst during a period of time [t | 08-21-2008 |
| 20080255336 | PROCESS FOR THE PREPARATION OF DIARYL CARBONATE - Diaryl carbonate is prepared by reaction of an aromatic alcohol with a dialkyl carbonate, which dialkyl carbonate has been prepared by the reaction of an alkanol and an alkylene carbonate. | 10-16-2008 |
| 20080269433 | Process for the Carbonylation of a Conjugated Diene - A process for the carbonylation of a conjugated diene to an ethylenically unsaturated acid, comprising the steps of (a) contacting a conjugated diene with carbon monoxide and water in the presence of a catalyst system including a source of palladium, a source of an anion and a bidentate phosphine ligand, to obtain a mixture comprising an ethylenically unsaturated acid and a reversible diene adduct comprising alkenyl ester of the conjugated diene with the ethylenically unsaturated acid; (b) separating the obtained reaction mixture into a gaseous stream comprising unreacted conjugated diene and carbon monoxide, a first liquid product stream comprising at least part of the ethylenically unsaturated acid and the reversible diene adducts, and a second liquid stream comprising the catalyst system in admixture with the ethylenically unsaturated acid; (c) separating the first liquid product stream obtained in step (b) into a stream comprising the ethylenically unsaturated acid and a stream comprising the reversible diene adducts; and (d) recycling the stream comprising the reversible diene adducts to step (a), or converting the reversible diene adducts back to the conjugated diene and the ethylenically unsaturated acid and recycling the thus obtained conjugated diene to step (a). | 10-30-2008 |
| 20080269520 | Process for the Carbonylation of a Conjugated Diene to a Dicarboxylic Acid - A process for the carbonylation of a conjugated diene to a dicarboxylic acid, comprising the steps of (a) contacting a conjugated diene with carbon monoxide and water in the presence of a catalyst system including a source of palladium, a source of an anion and a bidentate phosphine ligand, to obtain a mixture comprising an ethylenically unsaturated acid and reversible diene adducts; (b) separating the obtained reaction mixture into a gaseous stream comprising unreacted conjugated diene and carbon monoxide, a first normally liquid stream comprising at least part of the ethylenically unsaturated acid and the reversible diene adducts, and a second normally liquid stream comprising the catalyst system in admixture with the ethylenically unsaturated acid; (c) recycling the second liquid stream obtained in step (b) to step (a); (d) separating the first liquid product stream obtained in step (b) into a stream comprising the ethylenically unsaturated acid and a stream comprising the reversible diene adducts; and (e) contacting the stream comprising the ethylenically unsaturated acid obtained in step (d) with carbon monoxide and water in the presence of a second catalyst system including a source of palladium, a source of an anion and a bidentate phosphine ligand. | 10-30-2008 |
| 20080300416 | Process - (Process of manufacturing propylene oxide and styrene which process comprises: (i) contacting propene with a mixture of ethylbenzene hydroperoxide and ethylbenzene in the presence of catalyst to obtain propylene oxide and 1-phenylethanol, (ii) separating propylene oxide from the reaction mixture obtained in step (i), (iii) subjecting the mixture obtained in step (ii) to distillation to obtain a top stream containing ethylbenzene and a bottom stream containing 1-phenylethanol, (iv) subjecting the bottom stream containing 1-phenylethanol obtained in step (iii) to a further distillation to obtain a top stream containing purified 1-phenylethanol and a bottom stream containing heavy by-products, (v) contacting the top stream containing 1-phenylethanol obtained in step (iv) with a dehydration catalyst to obtain styrene and water, (vi) subjecting the reaction mixture obtained in step (v) to distillation to obtain a top stream containing styrene and water and a bottom stream containing unconverted 1-phenylethanol, 2-phenylethanol, methylphenylketone and by-products, (vii) subjecting the bottom stream containing unconverted 1-phenylethanol, 2-phenylethanol, methylphenylketone and further by-products obtained in step (vi) to distillation to obtain a top stream containing methylphenylketone and a bottom stream containing 2-phenylethanol and heavy by-products, and (viii) recycling to step (iv) the bottom stream containing 2-phenylethanol and heavy by-products obtained in step (vii), wherein the bottom stream obtained in step (vii) is introduced into the distillation of step (iv) below the point at which the bottom stream containing 1-phenylethanol obtained in step (iii) is introduced. | 12-04-2008 |
| 20090143626 | PROCESS FOR PREPARING AN ARYLALKYL COMPOUND - The invention relates to a process for preparing an arylalkyl compound, which comprises contacting a feed comprising a bis(arylalkyl)ether with hydrogen in the presence of a catalyst at elevated temperature. | 06-04-2009 |
| 20120184767 | PROCESS FOR PREPARING ALKANEDIOL AND DIALKYL CARBONATE - The invention relates to a process for the preparation of an alkanediol and a dialkyl carbonate comprising:
| 07-19-2012 |
