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| Number | Title | Issue Date |
| 7166236 | Stain-resist compositions The present invention relates generally to stain-resist compositions, and particularly, but not by way of limitation, to fibers and textiles treated with stain-resist compositions. ... | 01/23/2007 |
| 7153480 | Apparatus for and method of producing aromatic carboxylic acids A reactor for the oxidation of a precursor to an aromatic carboxylic acid or ester thereof in a liquid phase reaction mixture is disclosed. The reactor comprises an elongate vessel, substantially vertical in use, having an upper mixing element and a lower mixing ele... | 12/26/2006 |
| 7129316 | Process for the manufacture of polyester via hydrogenation treatment of recycled diol An improved process for recycling unspent diol removed from a polyester manufacturing process wherein the diol is captured, hydrogenated, and recycled so that the final polyester product has improved color over polyesters produced using other recycled diols. ... | 10/31/2006 |
| 7087303 | Bulked continuous filament having a three-sided exterior cross-section and convex six-sided central void and yarn and carpet produced therefrom A bulked continuous filament with a three-sided exterior configuration is characterized in that each side has a smoothly curved contour extending between a first and a second rounded tip with an inwardly extending depressed region being disposed adjacent to each tip... | 08/08/2006 |
| 7073318 | Apparatus and method for heat-setting carpet yarns with hot atmospheric air An apparatus and method for texture heat-setting bulk continuous filament (BCF) yarns in hot air heat-setting machines that includes a preheating device/step using a mixture of steam and atmospheric air to preheat a twisted BCF yarn bundle to develop crimp memory an... | 07/11/2006 |
| 7060853 | Method for increasing oxidation reactor production capacity The present invention relates to a method for increasing the production capacity of a conventional oxidation reactor for catalytic liquid phase oxidation of paraxylene by staging the oxidation reaction into a first high pressure and high solvent ratio reaction zone ... | 06/13/2006 |
| 7034088 | Polyamide compounds An acid-dyeable polyester composition comprising (a) polyester and (b) secondary amine or secondary amine salt in an amount effective to promote acid-dyeability. The acid-dyeable polyester composition may be prepared by melt blending: the polyester; and polymeric ad... | 04/25/2006 |
| 7019155 | Hydrogenation of tetrahydroxybutane to tetrahydrofuran Disclosed is a method for the hydrogenation of tetrahydroxybutane in the presence of supported rhenium catalysts and an acid to form tetrahydrofuran and its precursors. ... | 03/28/2006 |
| 6989432 | Copolymers of tetrahydrofuran, ethylene oxide and an additional cyclic ether A copolymer with recurring constituent units derived by polymerizing tetrahydrofuran, ethylene oxide and at least one additional cyclic ether that can be substituted or unsubstituted that decreases the hydrophilicity imparted to the copolymer by the ethylene oxide. | 01/24/2006 |
| 6972342 | Method for producing crystalline carboxylic acids Improved process for producing purified aromatic carboxylic acid in the form of dried crystals which comprises cooling the crystals in a fluidized state after the drying step to a temperature at or below 100° C. prior to packaging and an apparatus therefor. ... | 12/06/2005 |
| 6949673 | Process for producing carboxylic acids Improved process for producing aromatic carboxylic acids by catalytic liquid phase oxidation of a corresponding precursor in a suitable solvent comprising feeding the reactants to a first oxidation reaction zone at high pressure and high solvent ratio, wherein uptak... | 09/27/2005 |
| 6881047 | Process and apparatus for improved conditioning of melt-spun material An apparatus and process for applying finish to an expanded filament array in a quench system with air directed inward to the filament bundle. The applicator may be used inside or proximate quench zones in a radial, pneumatic, or cross-flow quench system. The appara... | 04/19/2005 |
| 6855420 | Multilobal polymer filaments and articles produced therefrom This invention provides polymer filaments having a multilobal cross-section. The cross-section can have a filament factor of about 2.0 or greater and a tip ratio of greater than about 0.2. The filaments may be used as-spun as a spin-oriented feed yarn or as a direct... | 02/15/2005 |
| 6827897 | Reduction of friction effect between poly (ethylene terephthalate) preforms and bottles An additive system for polyester polymers comprising an effective amount of (i) a fatty acid amide selected from the group consisting of oleyl palmitamide, ethylene bis stearamide, ethylene bis oleomide, and stearyl erucamide; (ii) a partially or fully calcined poro... | 12/07/2004 |
| 6797850 | Catalytic dehydrogenation processes and chromium catalysts for use therein A chromium catalyst is disclosed for use in dehydrogenation and dehydrocyclization processes. ... | 09/28/2004 |
| 6790797 | Insulating and footwear system A system, for example a footwear system, with moisture transport properties includes an insulating layer, which has transport properties, coupled to a fabric lining fabric with moisture transport properties. Antimicrobial efficacy can also be obtained by adding anti... | 09/14/2004 |
| 6749785 | Multilayer structures of poly(1,3-propylene 2,6 napthalate) and poly (ethylene terephthalate) Multilayer shaped articles, including films, preforms and containers, and method for forming the same, having at least one layer of poly(1,3-propylene 2,6-naphthalate) and at least one layer of poly(ethylene terephthalate). Poly(1,3-propylene 2,6-naphthalate) can be... | 06/15/2004 |
| 6699545 | Method for increasing solid state polymerization rate of polyester polymers This invention concerns a method for increasing the polymerization rate of polyester polymers in the solid state by adding a catalytic amount of zinc p-toluenesulfonate to a polyester polymer melt that is essentially free of antimony and germanium, before... | 03/02/2004 |
| 6489386 | Method and composition for improving gas barrier properties of polymeric containers and films A polymer composition and method for reducing the permeability of gases through molded polymeric containers and films by incorporating into the polymer from which the container or film is formed an effective amount of a barrier-enhancing additive, such as... | 12/03/2002 |
| 6451966 | Method for increasing solid state polymerization rate A process for increasing the rate of polymerization of low molecular weight polyester particles under solid state processing conditions whereby the progress of polymerization is preferred over the progress of crystallization for a given mass of particles.... | 09/17/2002 |
| 6444151 | Apparatus and process for spinning polymeric filaments A melt spinning apparatus for spinning continuous polymeric filaments including a first stage gas inlet chamber adapted to be located below a spinneret and optionally a second stage gas inlet chamber located below the first stage gas inlet chamber. The ga... | 09/03/2002 |
| 6423789 | Process to produce poly(alkylene ether)glycol-containing polyesters A process for producing a polyester that comprises 65 to 90 wt. % poly(alkylene ether) glycol. The process comprises the step of copolymerizing a preformed polyester polymer having an inherent viscosity of at least 0.4 dL/g and a poly(alkylene ether) glyc... | 07/23/2002 |
| 6413631 | Process of open-end spinning of polyester staple fiber Polyester yarns whose polyester fibers are of simple oval peripheral cross-section of aspect ratio at least about 1.85:1 have shown better dye yield in fabrics than polyester staple fibers having lower aspect ratios. Such superior cross-sections for polye... | 07/02/2002 |
| 6407286 | Process for recovering hydrogen in producing pure terephthalic acid A method for recovering and recycling excess hydrogen from process vent streams in the production of highly pure terephthalic acid where the production of the pure terephthalic acid comprises catalytically hydrogenating impure terephthalic acid, which typ... | 06/18/2002 |
| 6407194 | Temporarily crosslinked polyester polymers A process for increasing the pill resistance of a polyester polymer wherein the polyester polymer is produced by polymerizing a polymerization mixture comprising (a) a carbonyl compound or an oligomer of the carbonyl compound and (b) a glycol. The process... | 06/18/2002 |
| 6368710 | Sulfonated aliphatic-aromatic copolyesters A sulfonated copolyester of the reaction product of: (a) one or more aromatic dicarboxylic acids or an ester thereof; (b) one or more aliphatic dicarboxylic acids or an ester thereof; (c) one or more sulfonated compound; and (d) isosorbide. The polyesters... | 04/09/2002 |
| 6307099 | Production of terephthalic acid An aromatic carboxylic acid such as terephthalic acid is produced by the liquid phase oxidation of a precursor thereof, the oxidation being carried out in such a way that substantially all of the aromatic carboxylic acid produced in the course of the reac... | 10/23/2001 |
| 6255510 | Production of aromatic carboxylic acids and recovery of Co/Mn catalyst from ash Cobalt and/or manganese is recovered from the ash obtained following incineration of the catalyst containing residue arising from the liquid phase oxidation of an aromatic carboxylic acid such as terephthalic acid. Recovery is effected by contacting the a... | 07/03/2001 |
| 6254779 | Treatment of effluent streams containing organic acids An acidic organics-containing waste water stream (12) derived from for example plant for the production of an aromatic carboxylic acid such as terephthalic acid is treated to allow recovery of alkali and water for recycle to the production process. The tr... | 07/03/2001 |
| 6245939 | Process for producing highly pure aromatic carboxylic acids An improved process for producing highly pure aromatic carboxylic acid from an impure solid acid product whereby the solid acid product is efficiently dissolved in a suitable solvent at relatively low temperatures despite the presence of solid lumps.... | 06/12/2001 |
| 6150553 | Method for recovering methyl acetate and residual acetic acid in the production acid of pure terephthalic acid A method for recovering methyl acetate and residual acetic acid in a two-stage process for producing pure terephthalic acid having a first oxidation stage and a second purification stage.... | 11/21/2000 |
| 6143926 | Process for producing pure terephthalic acid with improved recovery of precursors, solvent and methyl acetate Process for producing pure terephthalic acid having improved means for recovering and/or recycling terephthalic acid precursors, residual acetic acid and other reaction by-products, such as methyl acetate.... | 11/07/2000 |
| 6034269 | Process for producing pure carboxylic acids A process for producing pure carboxylic acids by catalytic liquid phase oxidation of a suitable precursor in a solvent in which the oxidation reaction is carried out in a plug flow reaction zone at a high solvent:precursor ratio and reaction conditions su... | 03/07/2000 |
| 5980696 | Dehydration of acetic acid by azeotropic distillation in the production of an aromatic acid An improved process for preparing an aromatic dicarboxylic acid wherein the improvement resides in dehydrating and recovering solvent from a feed stream having from 20% to 40% by weight water via azeotropic distillation with organic phase reflux using an ... | 11/09/1999 |
| 5961942 | Effluent gas treatment Process for removing organic constituents from a high pressure exhaust gas stream in a bromine assisted air oxidation process in which the exhaust gas contains methyl bromide.... | 10/05/1999 |
| 5886057 | Production of dicarboxylic acids Dicarboxylic acids or esters thereof are recovered from solid phase polyester materials, such as post-consumer products and factory scrap, by subjecting the polyester to at least two hydrolysis stages in at least the first of which the amount of water use... | 03/23/1999 |
| 5847203 | Bromine catalysed oxidation processes In plant for the production and processing of an aromatic carboxylic acid such as terephthalic acid, at least some of the plant components (especially those exposed to an acidic reaction medium at elevated temperatures and pressures in excess of 180° C. ... | 12/08/1998 |
| 5840965 | Process for the production of purified telephthalic acid Purified terephthalic acid is prepared by a process of subjecting an aqueous solution of crude terephthalic acid to hydrogenation to reduce impurities, crystallizing this solution to produce a slurry of purified terephthalic acid in an aqueous liquor, and... | 11/24/1998 |
| 5700857 | Flame resistant polyester resin composition A polyester resin composition made of a polyester resin containing a polyalkylene oxide soft segment component, a plasticizer, a crystallization promoter, and a brominated flame retardant is developed, said composition having good flame resistance and mec... | 12/23/1997 |
| 5688575 | Inserts encapsulated with a thermoplastic sheet material via compression molding This invention relates to metal-containing inserts, such as transformers, that are encapsulated, via compression molding processes, with at least one wet lay thermoplastic sheet material and that do not experience significant visible cracking during heat ... | 11/18/1997 |
