Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.

Abstract: An integrated ship mounted system for loading a gas stream, separating heavier hydrocarbons, compressing the gas, cooling the gas, mixing the gas with a desiccant, blending it with a liquid carrier or solvent, and then cooling the mix to processing, storage and transportation conditions. After transporting the product to its destination, a hydrocarbon processing train and liquid displacement method is provided to unload the liquid from the pipeline and storage system, separate the liquid carrier, and transfer the gas stream to a storage or transmission system.

Abstract: In accordance with an embodiment of the present invention, a blast-resistant panel may include a layer of a pre-cured elastomeric material having a predetermined thickness, a body portion, and a plurality of flanges, each of the plurality of flanges having a substantially equal width and depending away from a same side and at approximately equivalent right angles to the body portion. The blast-resistant panel may also include a plurality of fastener elements for securing the pre-cured elastomeric material layer to a surface of a structure through the plurality of flanges of pre-cured elastomeric material layer.

Abstract: Bulk storage of natural gas or methane is facilitated by absorbing and storing the gas in a liquefied medium through the interaction of moderate pressure, low temperature and a solvent medium. Systems and processes are provided that facilitate the absorption of natural gas or methane into a liquid or liquid vapor medium for storage and transport, and back into a gas for delivery to market. In a preferred embodiment, the absorptive properties of ethane, propane and butane under moderate conditions of temperature and pressure (associated with a novel mixing process) are utilized to store natural gas or methane at more efficient levels of compressed volume ratio than are attainable with natural gas alone under similar holding conditions. The preferred mixing process efficiently combines natural gas or methane with a solvent medium such as liquid ethane, propane, butane, or other suitable fluid, to form a concentrated liquid or liquid vapor mixture suited for storage and transport.

Abstract: This invention provides a means of loading, processing and conditioning raw production gas, production of CGL, storage, transport, and delivery of pipeline quality natural gas or fractionated products to market. The CGL transport vessel utilizes a pipe based containment system to hold more densely packed constituents of natural gas held within a light hydrocarbon solvent than it is possible to attain for natural gas alone under such conditions. The containment system is supported by process systems for loading and transporting the natural gas as a liquid and unloading the CGL from the containment system and then offloading it in the gaseous state. The system can also be utilized for the selective storage and transport of NGLs to provide a total service package for the movement of natural gas and associated gas production. The mode of storage is suited for both marine and land transportation and configured in modular form to suit a particular application and/or scale of operation.

Abstract: Systems and processes that facilitate the absorption of natural gas or methane through the interaction of moderate pressure and low temperature into a liquid or liquid vapor medium for storage and transport, and back into a gas for delivery to market. In a preferred embodiment, the absorptive properties of ethane, propane and butane under moderate conditions of temperature and pressure (associated with a novel mixing process) are utilized to store natural gas or methane at more efficient levels of compressed volume ratio than are attainable with natural gas alone under similar holding conditions. The preferred mixing process efficiently combines natural gas or methane with a solvent medium such as liquid ethane, propane, butane, or other suitable fluid, to form a concentrated liquid or liquid vapor mixture suited for storage and transport. The solvent medium is preferably recycled in the conveyance vessel on unloading of the natural gas.

Abstract: Copolyetherimides compositions having high glass transition temperatures and outstanding ductility are presented. The copolyetherimides having Mw of at least 40,000 comprising isomeric bis(phthalimide) structural units within a relatively narrow range of isomer proportions exhibited Tgs of at least 240° C. and outstanding Notched Izod values. The copolyetherimides comprise oxydianiline residues and structural units of the formulas (I) and (II) (III).

Abstract: In accordance with an embodiment of the present invention, a blast-resistant panel may include a layer of a pre-cured elastomeric material having a predetermined thickness, a body portion, and a plurality of flanges, each of the plurality of flanges having a substantially equal width and depending away from a same side and at approximately equivalent right angles to the body portion. The blast-resistant panel may also include a plurality of fastener elements for securing the pre-cured elastomeric material layer to a surface of a structure through the plurality of flanges of pre-cured elastomeric material layer.

Abstract: A method for the purification of aromatic polyether polymers prepared by a halide displacement polymerization process comprises adsorbing the catalyst with an alkali metal halide to form an adsorbent component and then removing the adsorbent component. Mixtures resulting from this method are also discussed.

Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.

Abstract: An integrated ship mounted system for loading a gas stream, separating heavier hydrocarbons, compressing the gas, cooling the gas, mixing the gas with a desiccant, blending it with a liquid carrier or solvent, and then cooling the mix to processing, storage and transportation conditions. After transporting the product to its destination, a hydrocarbon processing train and liquid displacement method is provided to unload the liquid from the pipeline and storage system, separate the liquid carrier, and transfer the gas stream to a storage or transmission system.

Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.

Abstract: A method for purifying a polymer comprising providing a first mixture comprising at least one solvent and at least one polymeric material, diluting the first mixture with veratrole to produce a second mixture in which the polymeric material is substantially dissolved at a temperature less than 100° C., performing at least one step selected from (i) contacting the second mixture with an aqueous wash solution, and (ii) filtering the second mixture.

Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.

Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.

Abstract: A method for making polyetherimides is provided by reacting a high purity dianhydride with an aromatic diamine under condensation polymerization conditions. The dianhydrides employed are purified by a method comprising contacting a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst, with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purified dianhydrides are then condensed with aromatic diamines to provide polyetherimide compositions which are substantially free of residual phase transfer catalyst.

Abstract: A method for purifying bisimides is provided. In one aspect, purified oxybisphthalimides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a bisimide compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the bisimide compound is then separated from the solid inorganic adsorbent material to provide a purified bisimide compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalimides, such as 4,4?-oxybis(N-methylphthalimide), which are substantially free of residual phase transfer catalyst.

Abstract: In accordance with an embodiment of the present invention, a blast-resistant panel may include a layer of a pre-cured elastomeric material having a predetermined thickness, a body portion, and a plurality of flanges, each of the plurality of flanges having a substantially equal width and depending away from a same side and at approximately equivalent right angles to the body portion. The blast-resistant panel may also include a plurality of fastener elements for securing the pre-cured elastomeric material layer to a surface of a structure through the plurality of flanges of pre-cured elastomeric material layer.

Abstract: A blast-resistant panel may include a layer of a pre-cured elastomeric material having a predetermined thickness, a body portion, and a plurality of flanges, each of the plurality of flanges having a substantially equal width and depending away from a same side and at approximately equivalent right angles to the body portion. The blast-resistant panel may also include a plurality of fastener elements for securing the cured elastomeric material layer to a surface of a structure through the plurality of flanges of cured elastomeric material.

Abstract: Articles for applying color on a surface that includes a sheet of dry color component having a margin, a front sheet surface, and a rear sheet surface opposite the front sheet surface, and an adhesive on the rear sheet surface for bonding the sheet to the surface. Either the margin of the sheet or the entire sheet is adapted for reducing or eliminating the visual perceptibility of the seam created when the margin is positioned in an overlapping, abutting, or spaced apart relationship with a margin of a juxtaposed second article. The reduction or elimination of the visual perceptibility of the seam may be promoted by a physical mechanism, a chemical mechanism, an optical mechanism, or a combination of these mechanisms.