Abstract:
A layered product comprises a layered metal oxide and pillars of an oxide of at least one element selected from Groups IB, IIB, IIIA, IIIB, IVA, IVB, VA, VB, VIA, VIIA and VIIIA of the Periodic Table of the Elements separating the layers of the metal oxide. Each layer of the metal oxide has the general formula [Mx y Z2-(x+y)O4] , wherein M is at least one metal of valence n wherein n is an integer between 0 and 7, represents a vacancy site, Z is a tetravalent metal, and wherein q = 4y-x(n-4), O
Abstract:
Alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a paraffin alkylating agent under alkylation reaction conditions in the presence of catalyst comprising synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36 +/- 0.4, 11.03 +/- 0.2, 8.83 +/- 0.14, 6.18 +/- 0.12, 6.00 +/- 0.10, 4.06 +/- 0.07, 3.91 +/- 0.07, and 3.42 +/- 0.06 Angstroms.
Abstract:
A linear low density copolymer of ethylene (LLDPE) of a density of at least 0.900 g/cc, having excellent processability, optical properties and impact strength.
Abstract:
The invention relates to new transition metal compounds useful as olefin polymerization catalysts. They are characterized by the formula (V) (E) (W)M(L), in which M is a transition metal, V, E, and W, is e.g. alkyl, and L is a ligand which has formula (I).
Abstract:
A production logging tool (12) includes a plurality of pads (40, 42, 44, 46) located on the outer periphery of the well and are directed toward the borehole center. In the preferred embodiment, eight pads (40, 42, 44, 46, 50, 52, 54, 56) are used, with two groups of four pads, each group is spaced apart on the production log tool. Each set of four includes two pairs spaced opposite each other, all four being placed at ninety degree intervals along the circumference of the wellbore. The second set of four pads are also placed at ninety degree intervals along the circumference of the wellbore, however, the group of pads for the second set are displaced forty-five degrees along the circumference of the wellbore from the group of pads for the first set. Each pad contains two hot wire anemometers (68, 70) for temperature measurement, a capacitor plate (74A, 74I) and an ultrasonic transducer (78) pointed toward reflective plates mounted on the center of the production log tool. The present invention may also include orientation measuring devices (32), pressure measuring devices (28), centralizing equipment (26, 36), etc. as included in many types of prior art tools.
Abstract:
A shape-selective catalyst comprises a synthetic porous crystalline material having the structure of ZSM-5 and a composition involving the molar relationship: X2O3:(n)YO2, wherein X is a trivalent element, such as aluminum, boron, iron and/or gallium, preferably aluminum; Y is a tetravalent element such as silicon and/or germanium, preferably silicon; and n is greater than about 12, and wherein the crystals have a major dimension of at least about 0.5 micron and a surface YO2/X2O3 ratio which is no more than 20 % less than the bulk YO2/X2O3 ratio of the crystal. The crystals have a diffusion-modifying surface coating of a refractory material such as silica or coke. The catalyst is useful in a wide variety of selective hydrocarbon conversion processes, particularly the selective disproportionation of toluene to para-xylene.
Abstract translation:形状选择性催化剂包括具有ZSM-5结构的合成多孔结晶材料和涉及摩尔关系的组成:X 2 O 3:(n)YO 2,其中X是三价元素,例如铝,硼,铁和/或 镓,优选铝; Y是四价元素,例如硅和/或锗,优选硅; 并且n大于约12,并且其中所述晶体的主要尺寸为至少约0.5微米,并且表面YO 2 / X 2 O 3比率不超过所述晶体的体积YO 2 / X 2 O 3比率的20%以下。 晶体具有耐火材料如二氧化硅或焦炭的扩散改性表面涂层。 该催化剂可用于多种选择性烃转化方法,特别是甲苯对对二甲苯的选择性歧化。
Abstract:
A label facestock structure is described which comprises a polymeric film substrate having on a first surface thereof (A) an adhesive anchor layer and on a second surface thereof (B) an ink base layer, the (A) and (B) layers are selected from the group consisting of: (i) a prime coating having on an external surface a functional coating of an interpolymer of (a) an rho , rho -monoehtylenically unsaturated carboxylic acid; and (b) a neutral monomer ester comprising an alkyl acrylate ester and an alkyl methacrylate ester; and (ii) an iminated polymer; or the (A) adhesive anchor layer is selected from the group consisting of: (iii) a mixture of the functional coating of (i) and the iminated polymer of (ii); (iv) a linear water dissipatable polyester condensation product; and (v) a polyester or the (B) ink base layer is selected from the group consisting of: (vi) a prime coating having on an external surface a functional coating of an acrylic copolymer; and (vii) a prime coating having on an external surface a functional coating of a styrene copolymer provided that each of the (A) adhesive anchor layer and the (B) ink base layer is different.
Abstract:
A method of producing a multilayer polymeric film is accomplished through the vapor deposition of a barrier coating onto an ethylene vinyl alcohol copolymer layer, which is adhered to a polymeric substrate. A multilayer polymeric film exhibiting barrier characteristics is also accomplished through the use of an ethylene vinyl alcohol copolymer layer between a vapor deposited barrier coating and a polymeric substrate.
Abstract:
A process of forming a bimetallic catalyst composition comprising a cocatalyst (a trialkylaluminum compound) and a catalyst precursor. The precursor comprises at least two transition metals; a metallocene complex is a source of one of said two transition metals. The precursor is produced in a single-pot process by contacting a porous carrier, in sequence, with a dialkylmagnesium compound, an aliphatic alcohol, a non-metallocene transition metal compound, a contact product of a metallocene complex and a trialkylaluminum compound, and methylalumoxane.
Abstract:
An isoparaffin olefin alkylation process conducted in the presence of RE USY or RE USX is disclosed. Catalysts useful have a particle size range from 50 to 150 microns and an attrition index of less than 10 and preferably less than 5. The alkylate product is useful, inter alia, as an octane enhancer for gasoline.