Bizarre Patents
Pneumatic Shoe Lacing Apparatus
This invention provides a pneumatic shoe lacing apparatus for the pneumatic lacing of shoe.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7692039 | Process for preparing purified terephthalic acid The present invention relates to a process for preparing purified terephthalic acid [PTA,], comprising the steps: dissolving crude terephthalic acid [CTA] in an aqueous medium in a reactor; hydrogenating CTA at a temperature of about 260-320° C. and a pressure of a... | 04/06/2010 |
| 7381386 | Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid A method for removing impurities from a mother liquor comprising a carboxylic acid, a metal catalyst, impurities by (a) evaporating the mother liquor comprising a carboxylic acid, a metal catalyst, impurities and a solvent in a first evaporator zone to produce a vap... | 06/03/2008 |
| 7358392 | Process for the oxidative purification of terephthalic acid Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The process produces purified carboxylic acid ... | 04/15/2008 |
| 7358414 | Para-xylene process using perm-selective separations Processes and apparatus are disclosed for recovery of purified products from a fluid mixture by means of integrated perm-selective separations with purified product recovery operations. More particularly, integrated processes of the invention comprise separations by... | 04/15/2008 |
| 7355071 | Method for preparing 2,6-naphthalene dicarboxylic acid Disclosed is an improved method for preparing 2,6-naphthalene dicarboxylic acid from di-lower alkyl 2,6-naphthalene dicarboxylate, which is characterized in that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specified amount of water in the presence ... | 04/08/2008 |
| 7351396 | Extraction process for removal of impurities from an aqueous mixture A method for removing impurities from an aqueous mixture or purified aqueous by extracting the aqueous mixture or purified aqueous mixture with an extraction solvent in an extraction zone to form an extract stream and the raffinate stream; and optionally separating ... | 04/01/2008 |
| 7342128 | Method for oxidizing a slurry composition in a post oxidation zone in the presence of added steam The present invention relates to a process for oxidizing a slurry composition in a post oxidation zone in the presence of added steam. More specifically, the present invention relates to a process for oxidizing a crude terephthalic acid composition in a post oxidati... | 03/11/2008 |
| 7307188 | Purification of carboxylic acids by complexation with selective solvents A method and apparatus for purifying carboxylic acids is disclosed. A mixture containing crude carboxylic acid is contacted with a selective crystallization solvent to form a slurry of a salt complex of the carboxylic acid and the selective crystallization solvent. ... | 12/11/2007 |
| 7291270 | Process for removal of impurities from an oxidizer purge stream A process is disclosed that relates to the removal of impurities and the recovery of a mother liquor and wash filtrate from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves the rem... | 11/06/2007 |
| 7282151 | Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge st... | 10/16/2007 |
| 7273559 | Process for removal of impurities from an oxidizer purge stream A process is disclosed that relates to the removal of impurities and the recovery of a mother liquor and wash filtrate from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves the rem... | 09/25/2007 |
| 7238833 | Production of aromatic carboxylic acids A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor... | 07/03/2007 |
| 7196215 | Process for the production of purified terephthalic acid Disclosed is a process for the production of terephthalic acid by a plurality of process steps including the catalyst oxidation of a dialkylbenzene compound, a second oxidation, a hydrogenation of the product of the second oxidation, and crystallization of the hydro... | 03/27/2007 |
| 7173150 | Process for recovering terephthalic acid from pulverized product of spent polyethylene terephthalate and system for use in such process This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate. This process comprises (1) a decomposition reaction step where the pulverized products of spent polyethylene terephthalate are ... | 02/06/2007 |
| 7161027 | Process for the oxidative purification of terephthalic acid Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The purified carboxylic acid slurry is further... | 01/09/2007 |
| 7153998 | Method for refining 2,6-naphthalene dicarboxylic acid The present invention relates to a method for refining 2,6-naphthalene dicarboxylic acid, and particularly to a method for refining 2,6-naphthalene dicarboxylic acid comprising recrystallizing crude 2,6-naphthalene dicarboxylic acid in the form of an amine salt usin... | 12/26/2006 |
| 7132566 | Process for the purification of a crude carboxylic acid slurry Disclosed is a process to produce a purified carboxylic acid product. The process comprises removing impurities from a crude carboxylic acid slurry in a solid-liquid displacement zone to form a slurry product. The slurry product if further treated in a staged oxidat... | 11/07/2006 |
| 7102029 | Method of crystallization The present invention proposes a crystallization process comprising the steps of feeding a slurry solution in which a terephthalic acid solution or a part of the terephthalic acid is precipitated to a crystallization vessel, precipitating the terephthalic acid in th... | 09/05/2006 |
| 7074954 | Process for the oxidative purification of terephthalic acid Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The process produces purified carboxylic acid ... | 07/11/2006 |
| 7005540 | Method of purifying aromatic polycarboxylic acid Crude polycarboxylic acid is slurried in an aqueous medium and the slurry is brought into contact with a metal catalyst while preventing catalyst components thereof from contaminating crystals. Since hydrogenation or decarbonylation of a polymerization inhibitory su... | 02/28/2006 |
| 6992037 | Precious metal catalyst for debenzylation One aspect of the invention relates to catalyst composite containing a metal catalyst and a specifically defined carbon support containing a carbonaceous material. For example, the carbon support may have a total pore surface area of about 800 m2/g or mor... | 01/31/2006 |
| 6855845 | Process for the preparing bromoisophithalic acid compound The present invention relates to a process for preparing bromoisophthalic acid compounds, particularly 5-bromoisophthalic acid compounds and 4,5-dibromoisophthalic acid compounds comprising brominating an isophthalic acid compound of the general formula (1) | 02/15/2005 |
| 6765113 | Production of aromatic carboxylic acids A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor... | 07/20/2004 |
| 6756509 | Method for purifying crude 2,6-naphthalenedicarboxylic acid A method for purifying crude 2,6-naphthalenedicarboxylic acid includes a reduction step of reducing crude 2,6-naphthalenedicarboxylic acid containing 6-formyl-2-naphthoic acid with hydrogen and a cleaning step of cleaning the reduction product with alcohol. Preferab... | 06/29/2004 |
| 6723873 | Production of terephthalic acid and ethylene glycol from polyethlene terephthalate by ammoniolysis A process for forming reactants useful in the manufacture of polyethylene terephthalate includes the steps of: (a) contacting recyclable polyethylene terephthalate with ammonium hydroxide whereby a mixture of ammonium terephthalate and ethylene glycol is formed, (b)... | 04/20/2004 |
| 6720448 | Method of recovering chemical species by depolymerization of poly (ethylene terephthalate) and related use The present invention relates to a method of recovering a solution comprising the chemical species obtained by depolymerization of PET from a material containing poly(ethylene terephthalate) in the form of bottles, by making said material react, in the absence of wa... | 04/13/2004 |
| 6717009 | Method for making high-purity naphthalenedicarboxylic acid A high-purity naphthalenedicarboxylic acid is produced by a method including Steps [1] and [2]: In Step [I], a raw mixture of crude terephthalic acid and crude naphthalenedicarboxylic acid is dissolved into high-temperature high-pressure water to form a dibasic acid... | 04/06/2004 |
| 6689903 | Crystallization method for production of purified aromatic dicarboxylic acids Disclosed is a method for the recovery of crystalline terephthalic acid containing less than about 150 ppmw p-toluic acid by subjecting a solution of terephthalic acid containing minor amounts of p-toluic acid to crystallization in a crystallization zone ... | 02/10/2004 |
| 6670503 | Method for recovery of terephthalic acid from a material containing poly(ethylene terephthalates) The present invention relates to a method of recovering terephthalic acid from a material containing poly(ethylene terephthalate) (P.E.T.) in the form of bottles, by making said material react, in the absence of water, with a reagent consisting of one or ... | 12/30/2003 |
| 6639104 | Process for the recovery of purified terephthalic acid (PTA) A process for the preparation of purified terephthalic acid which comprises first introducing a liquid slurry containing crystalized terephthalic acid with impurities into a high pressure rotary filter, then filtering the slurry with the high pressure rot... | 10/28/2003 |
| 6580005 | Process for recovering terephthalic acid from pulverized product of spent polyethylene terephthalate and system for use in such process This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate. This process comprises (1) a decomposition reaction step where the pulverized products of spent polyethylene terepht... | 06/17/2003 |
| 6579990 | Process for producing refined pyromellitic acid and refined pyromellitic anhydride A process for refined pyromellitic anhydride which comprises dissolving crude pyromellitic acid or crude pyromellitic anhydride in water, then cooling an aqueous solution thus obtained to perform crystallization as pyromellitic acid, then separating a cry... | 06/17/2003 |
| 6534677 | Non-crushable, non-friable, non-breakable carbon catalyst supports The present invention provides a carbon-containing catalyst support that includes at least a carbonaceous material nd a thermosetting or sinterable polymer. The components are mixed and the polymer sintered or thermoset to provide a non-crushable, non-fri... | 03/18/2003 |
| 6461700 | Aromatic acid monomers, polymers, products and processes for their manufacture Processes for producing aromatic monomers useful for forming polyesters are disclosed. Cost effective steps employed in the processes permit small amounts of process-related materials typically removed from monomer to remain in an aromatic monomer product... | 10/08/2002 |
| 6455731 | Process for producing a high purity aromatic polycarboxylic acid A process for producing a high purity aromatic polycarboxylic acid by purify a crude aromatic polycarboxylic acid in accordance with the steps of (I) forming an amine salt of an aromatic polycarboxylic acid from the crude polycarboxylic acid and an amine,... | 09/24/2002 |
| 6452047 | Process for producing highly pure aromatic polycarboxylic acid Highly pure, less colored aromatic polycarboxylic acids are produced from crude aromatic polycarboxylic acids by simple procedures at low production costs. The crude aromatic polycarboxylic acid is mixed with aliphatic amine or alicyclic amine in the pres... | 09/17/2002 |
| 6441225 | Purification of aromatic diacids A method is provided to produce dicarboxylic or tricarboxylic aromatic acid from salts of such acids, the method including the steps of providing an aqueous solution of a salt of a dicarboxylic or tricarboxylic aromatic acid, the aqueous solution having a... | 08/27/2002 |
| 6426430 | Method for reduction of potassium in an integrated process for the production of 2,6--NDA Disclosed is a method for reducing alkali metals in aromatic dicarboxylic acids produced by disproportionation or rearrangement of an alkali salt of a mono- or dicarboxylic acid to levels acceptable for polymerization which comprises: a) Washing the aroma... | 07/30/2002 |
| 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 |
| 6392091 | Process of purifying and producing high purity aromatic polycarboxylic acids The present invention provides a solvent extraction purification method for aromatic polycarboxylic acids that meet or exceed polymer-grade specification. The method includes dissolving a crude aromatic polycarboxylic acid in a base compound; removing imp... | 05/21/2002 |
