Shell Oil Comapny

Celanese International Corporation

Other

Michael J Doyle

Johannes A Van Broekhoven

G Paull Torrence

Jan Cornelis Van Der Waal

Barbara F M Kimmich

Qiang Yao

Hannah E Toomey

Johan C Van Ravenswaay Claasen

Richard L Wife

Gerrit G Rosenbrand

Johan Van Gogh

Willem Terlouw

Jan Cornelius Van Der Waal

Barbara FM Kimmich

A process for the selective production of vinyl ester by the reaction of a carboxylic acid with acetylene with a homogeneous catalyst is disclosed and claimed. In one aspect, esters of neoacids are provided.

Vinyl ester production from acetylene and carboxylic acid utilizing homogeneous catalyst

A process for the selective production of vinyl ester by the reaction of a carboxylic acid with acetylene with a homogeneous catalyst is disclosed and claimed. In a preferred embodiment of this invention, reaction of benzoic acid and acetylene in the presence of Group VIII metal complex catalyst at a temperature of about 50 to 180&#xb0; C. results in quantitative yields of vinyl benzoate.

A process for the polymerization of ethylene and/or one or more alpha-olefins comprising contacting ethylene, and/or the alpha-olefin(s) with a catalyst comprising a first component which is a bis(cyclopentadienyl) Group IVA metal compound containing a substituent capable of reacting with a cation, and a second component which is a compound having a bulky anion containing one or more boron atoms and which is substantially non-coordinating under the reaction conditions and a cation, in which process additional first component is added.

Polymerization process

A process for the preparation of olefins of the general formula (CH.sub.2 --CH.sub.2).sub.p --CH.dbd.CH.sub.2 in which formula R is a hydrocarbyl group and p is an integer of at least 1, comprising reacting ethene with at least one additional alpha olefin of the general formula R--CH.dbd.CH.sub.2 under oligomerization conditions in the presence of a catalyst system comprising a first component which is a bis(cyclopentadienyl) Group IVA metal compound containing a substituent which is attached to the metal and which is capable of reacting with a cation, and a second component which is a compound having a bulky anion containing a plurality of boron atoms and which is substantially non-coordinating under the reaction conditions and a cation, and recovering an oligomeric product comprising linear olefins of the general formula R--(CH.sub.2 --CH.sub.2).sub.p --CH.dbd.CH.sub.2, wherein the additional alpha olefin(s) and ethene are present in a molar ratio of at least 1 and wherein at least one of the cyclopentadienyl groups of the metal compound is (cyclo)alkyl and/or arylalkyl substituted.

Co-oligomerization process

A process for the preparation of an alkyl methacrylate, which process comprises:

Process for the preparation of an alkyl methacrylate

The invention deals with an end face (1) with tear-away lip closure (3) for a pressurized container. Upon opening the tear-away lip (3), often the contents of the container are sprayed around because of the high internal pressure and the formation of foam after shaking the container. To remedy this disadvantage of known containers, a throttle device (5) for controlled release of the excess pressure is applied over the hole which is formed on tearing open the first section of the lip closure (3). This throttle device can be applied to both lip closures which are completely removed from the end face, as well as lip closures which stay attached to the end face and which are pushed into the inner space of the container.

End face with tear-off lip closure for pressurized container

The invention is a process for reducing catalyst residues from a Group VIII metal compound-containing polymer of CO, ethylene and optionally at least one olefinically unsaturated hydrocarbon. The process comprises contacting the polymer with an effective amount of a bidentate phsophine ligand having the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent hydrocarbon groups which may contain polar or non-polar substituents and R represents a bivalent organic bridging group containing at least two carbon atoms in the bridge, recovering a Group VIII metal compound-containing organic liquid, contacting said Group VIII metal compound-containing liquid with an effective oxidant for the Group VII metal and recycling the resulting oxidized Group VIII metal compound to a process for preparing polymers of carbon monoxide and ethylene.

Removal of catalyst residues from carbon monoxide/olefin polymers with

A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon having enhanced purity is produced by contacting the polymer, subsequent to polymerization but prior to recovery from the polymerization mixture, with a complexing agent for palladium.

The invention is a process for preparing a linear alternating polymer which process comprises contacting ethylene and carbon monoxide in the presence of a catalyst, at a total pressure within the range of 100 to about 250 bar and an ethylene/carbon monoxide partial pressure ratio from about 0.75 to about 3, wherein the catalyst comprise (1) a Group VIII metal compound of palladium, cobalt or nickel, (2) an anion of a non-hydrohalogenic acid with a pKa less than 6 and (3) a bidentate phosphorus, arsenic or antimony ligand.

Process for preparing polymers of carbon monoxide and ethylene under

The invention is a process for reducing catalyst residues from a Group VIII metal compound-containing polymer of CO, ethylene and optionally at least one of olefinically unsaturated hydrocarbon. The process comprises contacting the polymer with an effective amount of a bidentate phosphine ligand having the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent hydrocarbon groups which may contain polar or non-polar substituents and R represents a bivalent organic bridging group containing at least two carbon atoms in the bridge.

Removal of catalyst residues from carbon monoxide/olefin polymer with

Polymers of relatively high bulk density are produced at a satisfactory rate by polymerization carried out as a gas phase polymerization, in which the monomers are contacted with the catalyst composition in the substantial absence of a liquid non-polymerizable diluent. Comparison of polymerization in liquid phase and in gas phase polymerization shows that when for both polymerizations the temperature is lowered to achieve the same increase in molecular weight, the gas phase polymerization shows a considerably smaller loss of reaction rate and bulk density. It has further been found that when polymers of the same molecular weights are prepared in both gas phase and liquid phase polymerizations, the rate at which the polymers are produced is higher in the case of the gas phase polymerizations, and, in addition, the gas phase prepared polymers have higher bulk densities.

Growing community of inventors

Amsterdam, Netherlands

Michael J Doyle