Abstract: An improved valve of the flapper plate type is disclosed, the valve comprising at least one flexible member for connecting the flapper plate and the arm actuating the flapper. The flexible member absorbs impact energy and allows restricted three dimensional movement of the flapper plate. The seals for the flapper plate and the seat comprise electrically conductive sealing materials.

Abstract: A racemic mixture of a chiral, silicon bridged transition metal metallocene, which is substantially free of meso isomer, is precipitated directly from a reaction mixture as it is formed by reacting an organic solvent solution of an alkali metal salt of a silicon bridged ligand with a transition metal tetrahalide-ether complex.

Abstract: Conjugated diene impurities are removed from linear alpha-olefin products by contacting the linear alpha-olefin product with an acid treated montmorillonite clay which is effective to reduce the conjugated diene content of the linear alpha-olefin product, preferably to less than about 100 ppm, without substantial isomerization of the linear alpha-olefins to internal olefins.

Abstract: A synthetic oil is made by a process comprising (a) isomerizing at least a portion of a vinylidene olefin feed to form an intermediate which contains tri-substituted olefin and (b) reacting said intermediate and at least one vinyl olefin in the presence of a catalyst to form a synthetic oil which comprises a co-dimer of said vinylidene olefin and said vinyl olefin.

Abstract: This invention povides to a process for making an aluminum trialkyl product which process comprises reacting a mixture comprising, (i) an aluminum alkyl feed which contains one or more aluminum alkyls represented by the formula R.sub.3 Al, where R represents a C.sub.2 to C.sub.20 straight chain alkyl radical and each R can be the same or different, the alkyl radicals in said aluminum alkyl feed having an average chain length of at least about C.sub.

Abstract: A process for preparing a cyclopentenone by forming a two-phase mixture of a 1,4-diketone, a water immiscible organic solvent, and an aqueous base solution, and heating the mixture so as to convert the 1,4-diketone to a cyclopentenone which collects in the organic solvent phase.

Abstract: A process for separating a mixture of aluminum alkyl and alpha-olefin, said process comprising contacting a silica modified inorganic membrane filter with said mixture and recovering, as the permeate, an alpha-olefin fraction which contains a lower concentration of aluminum alkyl than in said mixture, as the retentate, an aluminum alkyl fraction which contains a higher concentration of aluminum alkyl than in said mixture.

Abstract: An improved process for preparing an alkyl chain growth product by the chain growth reaction of .alpha.-olefin in an aluminum alkyl uses a catalyst system which comprises an actinide metallocene.

Abstract: Linear 1-olefins are continuously prepared from internal olefins by (i) continuously feeding internal olefin, isomerization catalyst and tri-lower alkyl aluminum to a reaction zone so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, (ii) continuously removing trialkylaluminum compound from the reaction zone and, thereafter (iii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.

Abstract: The process for preparing a compound of the formula:Cp'YNHRwherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C.sub.1 to C.sub.20 hydrocarbyl or substituted hydrocarbyl group, the process comprising reacting a ligand of the formula Cp'YX, wherein Cp' and Y are as defined above and X is halogen, with a substantially equimolar amount of a primary amine of the formula NH.sub.2 R, wherein R is as defined above, in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35.degree. C., so as to form said compound.

Abstract: Heat transfer, lubricating, functional and/or insulating fluid compositions for use in apparatus such as electrical transformers contain up to 25 weight percent of one or more oil additives and a 1-octene and/or 1-decene dimer and/or a 1-octene and 1-decene co-dimer oil having improved low temperature properties which oil contains less than about 2.5 weight percent of, respectively, the 7-methylpentadecene, 9-methylnonadecene and, 7- and 9-methylheptadecene isomers. The dimers can be hydrogenated to provide the saturated counterparts of the isomers.

Abstract: Soluble methylaluminoxane is prepared by reacting water with a solution of an alkylaluminum compound, wherein at least about half the alkyl groups are methyl groups, in a 1:4 to 4:1 by volume aliphatic hydrocarbon/aromatic hydrocarbon solvent mixture, wherein the aliphatic hydrocarbon solvent has a lower boiling point than the aromatic hydrocarbon solvent, so as to form a product solution of methylaluminoxane in said solvent mixture along with insoluble reaction products which can be removed by filtration. The aliphatic solvent can be removed by vaporization to give a concentrated solution of aluminoxane in the aromatic solvent.

Abstract: A process for separating a mixture of aluminum alkyl and alpha-olefin comprises contacting, under an elevated pressure of at least about 300 psig, an organic solvent stable, polyphenylene oxide-derived membrane with said mixture and recovering as the permeate an alpha-olefin fraction which contains a lower concentration of aluminum alkyl than in the starting mixture.

Abstract: Cyclic ethers are prepared by reacting an unsaturated olefin oligomer derived from an alpha-olefin monomer containing from about 6 to 20 carbon atoms with an aldehyde in the presence of an acid catalyst.

Abstract: Gel and gel forming materials are removed from methylaluminoxane by mixing an aromatic hydrocarbon solvent solution of the methylaluminoxane with an aliphatic hydrocarbon solvent and then separating the precipitated solids from the methylaluminoxane solution.

Abstract: This invention povides to a process for making an aluminum trialkyl product which process comprises reacting a mixture comprising, (i) an aluminum alkyl feed which contains one or more aluminum alkyls represented by the formula R.sub.3 Al, where R represents a C.sub.2 to C.sub.20 straight chain alkyl radical and each R can be the same or different, the alkyl radicals in said aluminum alkyl feed having an average chain length of at least about C.sub.

Abstract: Hydroxybenzoates such as methylsalicylate are alkylated by reacting a hydroxybenzoate with a polyalphaolefin in the presence of a catalytic amount of SnCl.sub.4.

Abstract: Amine salts of phosphorothioic acids, useful for example in lubricant compositions, are made by forming a mixture of sulphur and an amine, and then adding a phosphite ester. The reaction is controlled by the rate of addition of the ester.

Abstract: An improved process for the preparation of higher aluminum alkyls by a chain growth reaction of an .alpha.-olefin and especially ethylene with a lower molecular weight aluminum alkyl or aluminum hydride uses a catalyst system which comprises at least one of (a) a metallocene of a transition metal and an aluminoxane (b) a cationic transition metal metallocene complex with an inert, non-coordinating anion, and (c) a cationic transition metal metallocene complex with an inert, non-coordinating anion and a hydrocarbylaluminoxane. Higher purity alpha olefins can be recovered by olefin displacement. Alternatively, linear primary alcohols can be produced by oxidation and hydrolysis.

Abstract: A synthetic oil composition comprises a major portion by weight of synthetic base oil having a kinetic viscosity of from about 1.5 to 2.5 cSt at 100.degree. C. and a minor portion by weight of one or more property enhancing additives for said base oil, said base oil comprising a major portion by weight of dimer of 1-decene, said dimer having a kinetic viscosity of less than about 250 cSt at -40.degree. C., a kinetic viscosity of less than about 1,000 cSt at -54.degree. C. and a pour point of less than about -65.degree. C.