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| 20100069587 | METHOD FOR PREPARING COPOLYMERS - A method for the preparation of copolymers of ethylene and α-olefins having a fraction (%) of the molecular weight component of >1,000,000 of less than 6% comprises polymerising ethylene and an α-olefin in the presence of a supported polymerisation catalyst system comprising (a) a transition metal compound (b) a porous support material, and (c) an activator characterized in that the support material has been (i) dried at a temperature in the range 0° C. to 195° C. in an inert atmosphere, and (ii) treated with an organometallic compound. The resultant supported catalyst systems show improved productivity and allow for control of the resultant polymer properties. Particularly preferred supported catalyst systems are those comprising metallocene complexes. | 03-18-2010 |
| 20110021804 | PRODUCTION OF COMPOUNDS COMPRISING NITRILE FUNCTIONAL GROUPS - The present invention relates to a process for producing compounds comprising at least one nitrile function by hydrocyanation of a compound comprising at least one non-conjugated unsaturation. | 01-27-2011 |
| 20110118499 | PREPARATION OF NITRILES FROM ETHYLENICALLY UNSATURATED COMPOUNDS - A process for the hydrocyanation of a hydrocarbon-based compound having at least one site of ethylenic unsaturation into a nitrile compound includes reaction thereof, in a liquid medium, with hydrogen cyanide in the presence of a catalyst containing a metal element selected from among the transition metals and an organophosphorus ligand, wherein the organophosphorus ligand is a compound of formula (I): | 05-19-2011 |
| 20110166376 | PREPARATION OF NITRILES FROM ETHYLENICALLY UNSATURATED COMPOUNDS - A process for the hydrocyanation of a hydrocarbon-based compound having at least one site of ethylenic unsaturation into a nitrile compound includes reaction thereof, in a liquid medium, with hydrogen cyanide in the presence of a catalyst containing a metal element selected from among the transition metals and an organophosphorus ligand, wherein the organophosphorus ligand is a mixture of at least one monodentate organophosphite compound and at least one monodentate organophosphine compound; the subject process is especially useful for the synthesis of adiponitrile from butadiene. | 07-07-2011 |
| 20110288327 | PROCESS FOR THE MANUFACTURE OF COMPOUNDS COMPRISING NITRILE FUNCTIONAL GROUPS - A method for producing compounds including at least one nitrile function by the hydrocyanation of a compound including at least one non-conjugated unsaturation is described. A method for producing compounds including at least one nitrile function by the hydrocyanation of an organic compound including at least one non-conjugated unsaturation including 2 to 20 carbon atoms by reacting with hydrogen cyanide in the presence of a catalytic system including at least one nickel complex in a zero oxidation state with at least one organophosphorus ligand selected from the group including organophosphites, organophosphonites, organophosphinites and organosphosphines and a co-catalyst such as a Lewis acid consisting of a mixture of Lewis acids is also described. | 11-24-2011 |
| 20120004440 | PROCESS FOR PRODUCING COMPOUNDS COMPRISING NITRILE FUNCTIONS - The present invention relates to a process for producing compounds comprising at least one nitrile function by hydrocyanation of a compound comprising at least one non-conjugated unsaturation. | 01-05-2012 |
| 20120035377 | ORGANOPHOSPHORUS COMPOUNDS, CATALYTIC SYSTEMS COMPRISING SAID COMPOUNDS AND METHOD OF HYDROCYANATION OR OF HYDROFORMYLATION USING SAID CATALYTIC SYSTEMS - Organophosphorus compounds, catalytic systems comprising a metallic element forming a complex with the organophosphorus compounds and methods of hydrocyanation and of hydroformylation employed in the presence of the catalytic systems are described. | 02-09-2012 |
| 20130023690 | PROCESS FOR THE PRODUCTION OF NITRILE COMPOUNDS FROM ETHYLENICALLY UNSATURATED COMPOUNDS - A method is described for the hydrocyanation of organic ethylene-unsaturated compounds into compounds including at least one nitrile function. Also described, is a method for the hydrocyanation of a hydrocarbon compound including at least one ethylenic unsaturation by reaction in a liquid medium with hydrogen cyanide in the presence of a catalyst including a metal element selected from among the transition metals and an organophosphorous ligand including, in one embodiment of the invention, an organophosphorous compound. The described method can be used in particular for the synthesis of adiponitrile from butadiene. | 01-24-2013 |
| 20130053580 | ORGANOPHOSPHORUS COMPOUNDS, CATALYTIC SYSTEMS COMPRISING SAID COMPOUNDS AND METHOD OF HYDROCYANATION USING SAID CATALYTIC SYSTEMS - The present invention relates to organophosphorus compounds belonging to the phosphinite-phosphite family, catalytic systems comprising a metallic element forming a complex with said phosphinite-phosphite compounds and methods of hydrocyanation employed in the presence of said catalytic systems. | 02-28-2013 |
| 20130109886 | PROCESS FOR PREPARING DICARBOXYLIC ACIDS | 05-02-2013 |
| 20130165699 | PROCESS FOR PURIFYING CRUDE GLYCEROL - A process is described for purifying crude glycerol obtained from raw materials such as glycerol obtained during manufacture of biodiesel or glycerol obtained during conversions of fats or oils. Further described, is how the process dissolves glycerol in an organic solvent and forms an insoluble phase comprising the salts of the crude glycerol. | 06-27-2013 |
| 20130178638 | PROCESS FOR PRODUCING DIOXOLANE - A process is described for producing dioxolane from crude glycerol obtained from raw materials such as the crude glycerol obtained during production of biodiesel or glycerol obtained during conversion of fats or oils. Further, the described method can dissolve the glycerol in an organic solvent and form an insoluble phase including salts included in the crude glycerol, and then react the glycerol obtained with an aldehyde or a ketone. | 07-11-2013 |
| 20140031504 | CATALYST SYSTEM - A catalyst system suitable for the polymerisation of olefins, said system comprising (a) a transition metal compound or lanthanide metal compound (b) a cocatalyst and (c) at least one porous support material characterised in that the porous support material has been pretreated with a halogen-containing organometallic compound, in particularly with a fluorine-containing organometallic compound. The catalyst system is particularly suitable for the preparation of polymers having broad molecular weight distributions from the polymerisation of olefins in the presence of a single site catalyst. | 01-30-2014 |
| 20140249327 | METHOD FOR PRODUCING NITRILE COMPOUNDS FROM ETHYLENICALLY UNSATURATED COMPOUNDS - The present invention relates to a method for the hydrocyanation of organic ethylenically unsaturated compounds including at least one nitrile function. The invention specifically relates to a method for the hydrocyanation of a hydrocarbon compound including at least one ethylenic unsaturation by a reaction with hydrogen cyanide in a liquid medium and in the presence of a catalyst including a metal element selected from the transition metals and an organophosphorous ligand, the organophosphorous gaud including a compound of general formula (I), where R | 09-04-2014 |
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| 20090036621 | Catalyst System - A catalyst system suitable for the polymerisation of olefins, said system comprising (a) a transition metal compound or lanthanide metal compound (b) a cocatalyst and (c) at least one porous support material characterised in that the porous support material has been pretreated with a halogen-containing organometallic compound, in particularly with a fluorine-containing organometallic compound. The catalyst system is particularly suitable for the preparation of polymers having broad molecular weight distributions from the polymerisation of olefins in the presence of a single site catalyst. | 02-05-2009 |
| 20090131613 | Supported polymerisation catalysts - A method for the preparation of a supported polymerisation catalyst system, comprises: (1) contacting together in a suitable solvent (a) a transition metal polymerisation talyst and (b) a cocatalyst, (2) contacting the mixture from step (1) with a porous support material, and (3) removing the solvent is characterised in that the molar ratio of cocatalyst to transition metal catalyst is <10:1. The preferred polymerisation catalysts are transition metal compounds in particular metallocene complexes. Premixing the catalyst components before addition to the support leads to certain advantages in particular a more facile method of preparation without any loss in activity. | 05-21-2009 |
| 20090131614 | Supported Polymerisation Catalysts - A supported polymerisation catalyst system comprises: (a) a polymerisation catalyst, (b) a cocatalyst, and (c) a porous support, and is characterised in that the porous support has been pretreated with (i) a chemical dehydration agent and (ii) a hydroxy compound wherein the hydroxy compound is not a cocatalyst or component thereof. The preferred polymerisation catalyst is a transition metal compound for example a metallocene and by use of the supported catalyst systems improved activity may be achieved. | 05-21-2009 |
| 20090215972 | Polymerisation Catalysts - A process for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in the presence of a catalyst system comprising—as components (a) a transition metal compound, (b) a non-aluminoxane activator, and (c) optionally a support, comprises the use of a prepolymer prepared by contact of the catalyst components with ethylene and/or one of more alpha-olefins at a temperature in the range 60° C. to 100° C. The prepolymer may be isolated or used in situ for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in particular 1-hexene. By use of the process thermal stability of the catalyst is improved leading to increased activity without any deterioration in polymer morphology. | 08-27-2009 |
| 20090233091 | Polymer Films - A method for the preparation of a polymer film containing 300-600 gels/m | 09-17-2009 |
