Abstract: This invention is directed to a molecular sieve composition or a catalyst containing molecular sieve which has a relatively high residual silica index, preferably at least about 1.5. The molecular sieve or catalyst can be made by contacting a template-containing molecular sieve with a silicon containing material having an average kinetic diameter that is larger than the average pore diameter of the sieve or catalyst, and heating to leave residual silica at the sieve or catalyst surface. The molecular sieve or catalyst is particularly effective in making an olefin product from an oxygenate feedstock.

Abstract: The present invention relates to an emulsion type modifier for improving properties of the pressure-sensitive emulsion acrylic adhesives. The emulsion type modifier comprises: (a) 15 to 35 parts per hundred of monomers of a diester of a dicarboxylic acid; (b) 15 to 35 parts per hundred of monomers of vinyl esters; (c) 35 to 65 parts per hundred of monomers of alkyl acrylates; based on the total weight of (a)+(b)+(c), and (d) 0.1 to 2.0 parts per hundred of an acetoacetoxy functional monomer; (e) 0.1 to 2.0 parts per hundred of a nonionic surfactant; and (f) 0.4 to 3.0 parts per hundred of an anionic surfactant. By adding the emulsion type modifier of the present invention, the steel adhesion, polyethylene (PE) adhesion, the loop tack and the holding power of the pressure-sensitive emulsion acrylic adhesives can be improved.

Abstract: A release coating composition for tapes is provided. The release coating composition includes: (a) 75-95 part per hundred (phr) alkyl (meth)acrylate type monomer; (b) 5-15 phr hydroxy alkyl (meth)acrylate type monomer; (c) 1-5 phr unsaturated carboxylic acid type monomer; (d) 0.1-5.0 phrunsaturated crosslinkng type monomer, and (e) 5-20 phr protective colloid. The sum of the alkyl acrylate type monomer (a), the hydroxy alkyl (meth) acrylate type monomer (b), the unsaturated carboxylic acid type monomer (c), and the unsaturated crosslinkng type monomer (d) amounts to 100 phr. The phrs of the protective colloid (e) are computed based on the sum of the alkyl (meth)acrylate monomer, the hydroxy alkyl acrylate type monomer, the unsaturated carboxylic acid type monomer, and the unsaturated crosslinking type monomer.

Abstract: The invention relates to a composition of an emulsion type, acrylic, pressure sensitive adhesive, which includes (a) 15 to 35 parts per hundred of dialkyl dicarboxylate, (b) 15 to 35 parts per hundred of vinyl esters, (c) 35 to 65 parts per hundred of alkyl acrylates or alkyl mathacrylates; (d) 0.1 to 2.0 parts per hundred of cross-linker based on the total weight of (a)+(b)+(c), (e) 0.2˜2.0 parts per hundred of hydroxy alkyl acrylates or hydroxy alkyl mathacrylates, (f) 0.1 to 1.0 parts per hundred nonionic surfactant, (g) 0.4 to 3.0 parts per hundred of anionic surfactant, (h) 0.1˜0.5 parts per hundred of reactive surfactant; which react with de-ionized water, an initiator and a buffer. The adhesives composition has excellent water-whitening resistance and aging resistance properties.

Abstract: A centrifugal pump pumps well fluid with a high gaseous content by utilizing an impeller design for use in gaseous liquids. The impeller has high discharge angles and large balance holes. The impeller has short and long vanes alternating with each other. The shorter vanes have a leading surface that is concave in shape. In one design, the longer vanes have a radially outward portion of a leading surface that is concave in shape. The radially outward portion of the longer vanes of this design has substantially the same radius of curvature as the shorter vanes. The radially inward portion of the leading edge of the longer vanes can be concave or convex in shape.

Abstract: This invention is directed to a molecular sieve composition or a catalyst containing molecular sieve which has a relatively high residual silica index, preferably at least about 1.5. The molecular sieve or catalyst can be made by contacting a template-containing molecular sieve with a silicon containing material having an average kinetic diameter that is larger than the average pore diameter of the sieve or catalyst, and heating to leave residual silica at the sieve or catalyst surface. The molecular sieve or catalyst is particularly effective in making an olefin product from an oxygenate feedstock.

Abstract: This invention is directed to a molecular sieve composition or a catalyst containing molecular sieve which has a relatively high residual silica index, preferably at least about 1.5. The molecular sieve or catalyst can be made by contacting a template-containing molecular sieve with a silicon containing material having an average kinetic diameter that is larger than the average pore diameter of the sieve or catalyst, and heating to leave residual silica at the sieve or catalyst surface. The molecular sieve or catalyst is particularly effective in making an olefin product from an oxygenate feedstock.

Abstract: The present invention relates to an emulsion type adhesive applicable for over-laminating films, the preparation and the use thereof. The emulsion type adhesive comprises: (a) 60 to 99.5 parts per hundred of monomers of one or more alkyl acrylates containing 4-12 carbon atoms on the alkyl group; (b) 0.5 to 40 parts per hundred of monomers of an alkyl acrylate containing 1-3 carbon atoms in the alkyl group or an alkyl methacrylate containing 1-6 carbon atoms in the alkyl group; (c) 0.1 to 5 parts per hundred of monomers of dicarboxylic acids; (d) 1 to 5 parts per hundred of a reactive surfactant; (e) 0.1 to 15 parts per hundred of an organic acid vinyl ester; and (f) 100 parts per hundred of soft water, (a) and (b) are 100 parts by hundred, while (c), (d), (e) and (f) are calculated based on the total weight of (a)+(b). The products of this invention have excellent properties.

Abstract: The present invention relates to an emulsion type modifier for improving properties of the pressure-sensitive emulsion acrylic adhesives. The emulsion type modifier comprises: (a) 15 to 35 parts per hundred of monomers of a diester of a dicarboxylic acid; (b) 15 to 35 parts per hundred of monomers of vinyl esters; (c) 35 to 65 parts per hundred of monomers of alkyl acrylates; based on the total weight of (a)+(b)+(c), and (d) 0.1 to 2.0 parts per hundred of an acetoacetoxy functional monomer; (e) 0.1 to 2.0 parts per hundred of a nonionic surfactant; and (f) 0.4 to 3.0 parts per hundred of an anionic surfactant. By adding the emulsion type modifier of the present invention, the steel adhesion, polyethylene (PE) adhesion, the loop tack and the holding power of the pressure-sensitive emulsion acrylic adhesives can be improved.

Abstract: A centrifugal pump pumps well fluid with a high gaseous content by utilizing an impeller design for use in gaseous liquids. The impeller has high discharge angles and large balance holes. The impeller has short and long vanes alternating with each other. The shorter vanes have a leading surface that is concave in shape. In one design, the longer vanes have a radially outward portion of a leading surface that is concave in shape. The radially outward portion of the longer vanes of this design has substantially the same radius of curvature as the shorter vanes. The radially inward portion of the leading edge of the longer vanes can be concave or convex in shape.

Abstract: A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter balance holes that typically range between 45% to 100% of the width between each split vane. The gas-handling centrifugal pump can be used as a charge pump for a centrifugal pump in a lower tandem configuration within a well.

Abstract: A gas-handling centrifugal pump has impellers for pumping gaseous materials containing up to 50% by volume free gas. The impellers have split vanes with high exit angles up to about 90 degrees and preferably greater than 50 degrees. The split vanes define flow passages that contain large diameter balance holes that typically range between 45% to 100% of the width between each split vane. The gas-handling centrifugal pump can be used as a charge pump for a centrifugal pump in a lower tandem configuration within a well.

Abstract: A gravitational animal trap. The trap includes a trap cage having a movable door, an unturned plate that can be adjusted in terms of different fulcrums thereof, and a sensing device that is pivotally jointed with the upturned plate to activate the door switch. When the prey enters the trap cage and steps on the upturned plate, causing the upturned plate to alter the state of equilibrium due to the gravitational force of the prey, the sensing device is activated to shut the movable door, thus achieving the object of entrapping the prey. A weight-adjusting balance device can be further installed with the present invention to effectively improve upon the sensitivity and timing for the shutting of the movable door of the gravitational animal trap.

Abstract: This invention is directed to a molecular sieve composition or a catalyst containing molecular sieve which has a relatively high residual silica index, preferably at least about 1.5. The molecular sieve or catalyst can be made by contacting a template-containing molecular sieve with a silicon containing material having an average kinetic diameter that is larger than the average pore diameter of the sieve or catalyst, and heating to leave residual silica at the sieve or catalyst surface. The molecular sieve or catalyst is particularly effective in making an olefin product from an oxygenate feedstock.

Abstract: A gravitational animal trap comprises a trap cage having a movable door, an upturned plate that can be adjusted in terms of different fulcrums thereof, and a sensing device that is pivotally jointed with the upturned plate to activate the door switch. When the prey enters the trap cage and steps on the upturned plate, causing the upturned plate to alter the state of equilibrium due to the gravitational force of the prey, the sensing device is activated to shut the movable door, thus achieving the object of entrapping the prey. A weight-adjusting balance device can be further installed with the present invention to effectively improve upon the sensitivity and timing for the shutting of the movable door of the gravitational animal trap.

Abstract: An ion exchange method is provided for loading and uniformly distributing noble metals into a catalyst substrate comprising a zeolite to make a monofunctional, non-acidic reforming catalyst. The catalyst substrate is contacted with an aqueous loading solution comprising noble metal cations and non-noble metal cations. The loading solution is formulated such that the equivalents of non-noble metal cations remaining in the catalyst not ionically bonded to the zeolite when loading is complete is 1.2 to 6.0 times the equivalents of non-noble metal cations displaced from the zeolite when the noble metal cations ion exchange into the zeolite, and simultaneously the endpoint pH of the loading solution is between 10.0 and 11.5. The required 1.2 to 6.0 ratio is achieved when the ratio of moles of non-noble metal cations added to the loading solution to moles of noble metal added to the loading solution is between 1 and 10.

Abstract: A process for reforming naphtha-containing hydrocarbon feedstreams is disclosed wherein a naphtha stream containing at least about 25 wt % of C5 to C9 aliphatic and cycloaliphatic hydrocarbons is contacted with a modified reforming catalyst, e.g. ZSM-5, containing a dehydrogenation metal, e.g. zinc, which has been modified by contact with Group IIA alkaline earth metal, e.g. barium, or with an organosilicon compound in an amount sufficient to neutralize at least a portion of the surface acidic sites present on the catalyst. The resulting reformate contains a reduced content of C1 to C4 gas and a C8 aromatic fraction having an enhanced content of para-xyelene.

Abstract: A process for reforming naphtha-containing hydrocarbon feedstreams is disclosed wherein a naphtha stream containing at least about 5 wt % of C9+ aromatics, at least about 25 wt % C.sub.5 to C.sub.9 aliphatic hydrocarbons and greater than 50 wt. ppm sulfur is contacted under reforming conditions with a bifunctional reforming catalyst, e.g. H.sup.+ ZSM-5, containing a dehydrogenation metal, e.g. zinc. The resulting reformate contains a higher ratio of C.sub.6 to C.sub.9 aromatics to C.sub.5 -C.sub.9 aliphatic hydrocarbon which boil near the boiling point of C.sub.6 to C.sub.8 aromatics present in the reformate, thereby facilitating separation of these aromatics form the reformate.

Abstract: The invention provides a crystalline type L zeolite reforming catalyst comprising cylindrically shaped crystals having a length of 0.6 microns or less and an average length: diameter ratio of less than about 0.5, the catalyst containing at least one Group VIII metal and from about 0.1 to 2 wt % halogen e.g., chlorine. Also provided is a method for activating or regenerating the catalyst wherein a fresh or de-coked catalyst is oxychlorinated, purged to remove excess chlorine and reduced. The catalysts are particularly useful for the reforming of C.sub.6 to C.sub.11 naphthas to produce reformates having a high content of C.sub.6 to C.sub.8 light aromatics and a reduced content of heavier C.sub.9 and C.sub.10 aromatics.

Abstract: A process for isomerizing a nonequilibrium xylene feed mixture is disclosed. The isomerization is conducted in the presence of hydrogen and at pressures in excess of 75 psig over a ZSM-5 type catalyst containing about 0.1 to 5 wt % of at least one metal selected from the group consisting of zinc, copper, silver and gallium. In another embodiment, the catalyst may further contain an oxide of at least one element selected from silicon, germanium and tin. The process produces a product containing about or above equilibrium quantities of para-xylene with low xylene loss.