Patent application number | Description | Published |
20090247790 | ISOTHERMAL PROCESS FOR PHOSPHOROMONOCHLORIDITE SYNTHESIS - The present invention relates to a process for preparation of a phosphoromonochloridite in high yield by contacting phosphorus trichloride (PCl | 10-01-2009 |
20100069680 | HYDROFORMYLATION PROCESS WITH IMPROVED CONTROL OVER PRODUCT ISOMERS - A continuous hydroformylation process for producing a mixture of aldehydes with improved flexibility and stability of a normal/branched (N/I) isomer ratio of the product aldehydes. The process involves reacting one or more olefinically-unsaturated compounds with carbon monoxide and hydrogen in the presence of an organopolyphosphite ligand and an organomonophosphite ligand, at least one of such ligands being bonded to a transition metal to form a transition metal-ligand complex hydroformylation catalyst; the process being conducted at a sub-stoichiometric molar ratio of organopolyphosphite ligand to transition metal, at a super-stoichiometric (>2/1) molar ratio of organomonophosphite ligand to transition metal, and at a carbon monoxide partial pressure in the inverse order region of the hydroformylation rate curve; and controlling and varying the isomer ratio by varying the concentration of organopolyphosphite ligand relative to transition metal. | 03-18-2010 |
20100267997 | PROCESS OF REFINING C6-16 ALIPHATIC DIOLS - A process of refining a crude C | 10-21-2010 |
20110021840 | SLURRY PROCESS FOR PHOSPHOROMONOCHLORIDITE SYTHESIS - A process for preparation of a phosphoromonochloridite in high yield, by contacting phosphorus trichloride (PCl | 01-27-2011 |
20110098514 | HYDROGENATION OF ALIPHATIC DIALDEHYDES TO ALIPHATIC DIOLS - A process of hydrogenating an aliphatic dialdehyde, preferably, a C | 04-28-2011 |
20110196166 | SLURRY PROCESS FOR SYNTHESIS OF BISPHOSPHITES AND SITU USE THEREOF FOR PRODUCING BISPHOSPHITE - The present invention provides a step-wise process for preparation of a bisphosphite. In step (a) the process prepares a phosphoromonochloridite in high yield, by contacting phosphorus trichloride with an aromatic diol in a slurry under reaction conditions and in the presence of a second aromatic diol to produce a mixture comprising the phosphoromonochloridite, the second aromatic diol, and excess PCl3. The slurry comprises less than 5 mole percent of a nitrogen base, and the organic solvent is selected for its low hydrogen chloride solubility. After removing the excess PCl3, a nitrogen base is added to effect condensation of the phosphoromonochloridite with the second aromatic diol to yield the bisphosphite. The invention particularly provides a process for preparing 6,6′-(3,3′,5,5′-tetra-tert-butylbiphenyl-2,2′-diyl)bis(oxy)didibenzo[d,f][1,3,2]dioxaphosphepine by the above route. | 08-11-2011 |
20120253080 | Controlling the Normal:ISO Aldehyde Ratio in a Mixed Ligand Hydroformylation Process by Controlling the Olefin Partial Pressure - Control of an in-series, multiple, e.g., two, reaction zone, hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound, e.g., propylene, with carbon monoxide, hydrogen and a catalyst comprising (A) a transition metal, e.g., rhodium, (B) an organobisphosphite, and (C) an organomonophosphite ligand, the contacting conducted in first and subsequent reaction zones and at hydroformylation conditions comprising an olefinically unsaturated compound partial pressure in each zone, the control exercised by decreasing the olefinically unsaturated compound partial pressure in the first reaction zone to decrease the N:I ratio or increasing the olefinically unsaturated compound partial pressure in the first reaction zone to increase the N:I ratio. | 10-04-2012 |
20120253081 | Controlling the Normal:ISO Aldehyde Ratio in a Mixed Ligand Hydroformylation Process by Conrolling the Syngas Partial Pressure - A method of controlling a hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound, e.g., propylene, with synthesis gas and a catalyst comprising a transition metal, e.g., rhodium, and an organopolyphosphite and an organomonophosphite ligand, the contacting conducted at hydroformylation conditions comprising a synthesis gas partial pressure, the method comprising increasing the synthesis gas partial pressure in the first reaction zone to decrease the N:I ratio or decreasing the synthesis gas partial pressure in the first reaction zone to increase the N:I ratio. | 10-04-2012 |
20120259142 | Controlling the Normal:ISO Aldehyde Ratio in a Mixed Ligand Hydroformylation Process - A method of controlling an in-series, multiple, e.g., two, reaction zone, hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound with synthesis gas and a catalyst comprising (A) a transition metal, e.g., rhodium, (B) an organobisphosphite ligand, and (C) an organomonophosphite ligand, the contacting conducted in first and subsequent reaction zone(s) and at hydroformylation conditions comprising a transition metal concentration in each zone, the method comprising decreasing the transition metal concentration in the first reaction zone to decrease the N:I ratio or increasing the transition metal concentration in the first reaction zone to increase the N:I ratio. | 10-11-2012 |
20130261344 | Mitigation of Fouling in Hydroformylation Processes by Water Addition - The extraction process for removing metal salts from an organic hydroformylation reaction fluid (“HRF”) prior to returning the HRF to a reaction zone of a hydroformylation process, the extraction process comprising the step of contacting the HRF with an aqueous buffer solution, is improved by contacting the HRF with water in addition to that present in the aqueous buffer solution, i.e., with added water. | 10-03-2013 |
20140051568 | Methods to Store Transition Metal Organophosphorous Ligand Based Catalysts - The catalyst solution used in a hydroformylation process is prepared for storage by first reducing its acid concentration and/or water content, and then storing the solution under a blanket of syngas and/or an inert gas. Alternatively, or in addition to, the catalyst solution can be stored with an aqueous buffer comprising materials that will neutralize and/or absorb the acid species within the catalyst solution. | 02-20-2014 |
20140350305 | HYDROFORMYLATION PROCESS - Disclosed is an improved exothermic hydroformylation process having at least two reaction stages. Cooling is provided by externally cooling a stream of reaction mixture from one of the stages, dividing the cooled stream into at least two cooled reaction mixture streams; transferring one cooled reaction mixture stream back into the same reaction stage from which it was removed to cool the reaction mixture in that reaction stage; and transferring at least one cooled reaction mixture stream(s) into and through heat exchange means that cool a different reaction stage, and returning it to the same reaction stage from which it was removed. | 11-27-2014 |
20150073169 | PURIFICATION PROCESS - A process for reducing the level of contaminant metals in ligands used in the preparation of catalysts is disclosed. | 03-12-2015 |