Abrégé

Provided herein is a process for producing a high-purity alumina, comprising the steps of: (a) sublimation of anhydrous aluminium chloride at a predetermined temperature to recover pure aluminium chloride; (b) dissolving aluminium chloride from step (a) in water to obtain aluminium chloride solution; (c) introducing HCI gas into aluminium chloride solution of step (b) to crystallize aluminium chloride hexahydrate; and (d) calcining aluminium chloride hexahydrate of step (c) to obtain high purity alumina.

Classes IPC  ?

• C01F 7/42 - Préparation de l'oxyde ou de l'hydroxyde d'aluminium à partir d'aluminium métallique, p. ex. par oxydation

Abrégé

A process for obtaining a dope dyed lyocell fibre can include the steps of (a) mixing one or more pigment with an aqueous organic solvent to obtain a slurry; (b) applying vacuum to said slurry to remove excess water content to obtain a masterbatch (c) mixing the masterbatch obtained in step (b) to a lyocell dope to obtain a pigmented dope; and (d) extruding said pigmented dope of step (c) through a spinneret to form dope dyed lyocell fiber.

Classes IPC  ?

• D01F 2/02 - Filaments, ou similaires, artificiels, à un seul composant, formés de cellulose ou de dérivés de la celluloseLeur fabrication obtenus à partir de solutions de cellulose dans des acides, des bases ou des sels
• D01F 1/04 - Pigments
• D01D 5/06 - Méthodes de filage au mouillé

Abrégé

The present invention relates to a process for manufacturing lyocell filament yarn with improved mechanical properties and an apparatus thereof. The process involves washing of filament yarn with sequential decrease in NMMO concentrations and filament yarn drying under relaxed conditions. Additionally, the present invention also provides a compact washing and drying apparatus that uses controlled air gap spinning thereby resulting in production of LFY under relaxed conditions and also having a higher mechanical properties & productivity.

Classes IPC  ?

• D01D 5/06 - Méthodes de filage au mouillé
• D01F 2/00 - Filaments, ou similaires, artificiels, à un seul composant, formés de cellulose ou de dérivés de la celluloseLeur fabrication
• D02J 1/22 - Étirage ou tension, retrait ou relâchement, p. ex. par utilisation d'appareils sur ou sous-alimentés ou empêchant l'étirage
• D01D 10/06 - Lavage ou séchage

Abrégé

Provided herein is a process for obtaining a dope dyed lyocell fibre, comprising the steps of (a) mixing one or more pigment with an aqueous organic solvent to obtain a slurry; (b) applying vacuum to said slurry to remove excess water content to obtain a masterbatch (c) mixing the masterbatch obtained in step (b) to a lyocell dope to obtain a pigmented dope; and (d) extruding said pigmented dope of step (c) through a spinneret to form dope dyed lyocell fiber.

Classes IPC  ?

• D01F 2/02 - Filaments, ou similaires, artificiels, à un seul composant, formés de cellulose ou de dérivés de la celluloseLeur fabrication obtenus à partir de solutions de cellulose dans des acides, des bases ou des sels
• D01F 2/14 - Addition de pigments
• C08B 1/00 - Traitement préparatoire de la cellulose pour l'obtention de dérivés cellulosiques
• C09B 67/00 - Traitements, sans réaction chimique, influençant les propriétés physiques, p. ex. de teintures ou d'impression, des matières colorantes, p. ex. traitement par des solvantsCaractéristiques du procédé de fabrication des préparations tinctorialesPréparations tinctoriales ayant un aspect physique particulier, p. ex. tablettes, feuilles

Abrégé

The present invention relates to an apparatus for enhancing performance of an aluminium reduction cell in a smelting process. It comprises a current collector bar and a metal insert placed inside the collector bar. The material of construction of the inserts is different from the material of construction of the collector bar(s). Moreover, thermal insulation strips placed along the bottom of the electrolytic cell such that heat is not able to escape from each end of the said cathode.

Classes IPC  ?

• C25C 3/08 - Construction des cellules, p. ex. fonds, parois, cathodes
• C25C 3/06 - Production, récupération ou affinage électrolytique de métaux par électrolyse de bains fondus de l'aluminium
• C25C 3/16 - Dispositifs d'alimentation en courant électrique, p. ex. barres omnibus

Abrégé

The present invention relates to a process for manufacturing lyocell filament yarn with improved mechanical properties and an apparatus thereof. The process involves washing of filament yarn with sequential decrease in NMMO concentrations and filament yarn drying under relaxed conditions. Additionally, the present invention also provides a compact washing and drying apparatus that uses controlled air gap spinning thereby resulting in production of LFY under relaxed conditions and also having a higher mechanical properties & productivity.

Classes IPC  ?

• D01D 1/02 - Préparation des solutions de filage
• D01F 2/00 - Filaments, ou similaires, artificiels, à un seul composant, formés de cellulose ou de dérivés de la celluloseLeur fabrication
• D01D 5/06 - Méthodes de filage au mouillé

Abrégé

A method for recovery of a-alumina from aluminium dross is disclosed. The method comprises of grinding aluminium dross to obtain particles having average particle size in the range of 80-100 micron, leaching aluminium dross with an acid to obtain a leach liquor having precipitated silica, separating the silica from the leach liquor to obtain a liquid phase, treating the liquid phase with an aqueous ammonia at acidic pH to facilitate precipitation of iron hydroxide, separating the iron hydroxide from the liquid phase to obtain an iron free liquid phase, treating the iron free liquid phase with aqueous ammonia at alkaline pH to facilitate precipitation of aluminium hydroxide; separating and calcining the aluminium hydroxide to obtain α-alumina having size in the range of 200-700 nm.

Classes IPC  ?

• C22B 7/04 - Mise en œuvre des scories
• B82Y 30/00 - Nanotechnologie pour matériaux ou science des surfaces, p. ex. nanocomposites
• C01F 7/44 - Déshydratation de l’oxyde ou de l'hydroxyde d'aluminium, c.-à-d. toutes les conversions d'une forme en une autre impliquant une perte d’eau

Abrégé

An acrylonitrile polymer composite suitable for fibers is disclosed. The acrylonitrile polymer composite is formed by modifying an acrylonitrile polymer with a modified starch, wherein the modified starch has a degree of substitution of at least 1.5 obtained by modifying a starch with a starch modifier with a formula R-X wherein R is six to ten membered ring of carbon. A method of making an acrylonitrile polymer composite is also disclosed.

Classes IPC  ?

• C08F 251/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polysaccharides ou leurs dérivés
• C08L 51/02 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères greffés sur des polysaccharides

Abrégé

2S obtained during desulfurization of petroleum residue with a mixture of at least one organic solvent and water.

Classes IPC  ?

• C01B 17/22 - Sulfures ou polysulfures de métaux alcalins
• C01B 17/36 - Purification
• B09B 3/00 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif
• C10G 29/04 - Métaux ou métaux déposés sur un support
• C10G 53/08 - Traitement des huiles d'hydrocarbures, en l'absence d'hydrogène, par plusieurs procédés de raffinage uniquement par plusieurs étapes en série comprenant au moins une étape d'absorption ou d'adsorption
• C10G 21/14 - Hydrocarbures