摘要:
Procédé et appareil pour l'obtention de granules parfaitement shpériques et poreux qui se dissolvent plus rapidement que les granules classiques et qui présentent des dosages plus élevés à grandeur égale, ou des dosages identiques pour des dimensions moindres. Le procédé consiste à contrôler la forme et les dimensions des gouttes émises, au moyen d'un flux d'air laminaire et concentrique à la goutte, qui effleure la surface de la goutte pendant l'émission de cette dernière. L'appareil comprend des moyens d'alimentation en matière première, des moyens (9, 10, 11) pour créer et provoquer l'écoulement d'un lit (L) de matière première au-dessous des moyens (13) distributeurs de gouttes, des moyens (14, 15) d'alimentation en liquide producteur de gouttes, des moyens (1-5) d'alimentation et de distribution d'air sous pression autour des moyens (13) distributeurs de gouttes, des moyens (17, 19, 21, 22, 23, 24) pour sélectionner et transporter les granules produits et des moyens (26, 27) de recyclage de la matière première et des granules écartés par des moyens de sélection.
摘要:
An abrasive particle having a body including a first major surface, a second major surface opposite the first major surface, and a side surface extending between the first major surface and the second major surface, such that a majority of the side surface comprises a plurality of microridges.
摘要:
A method for producing a multimetal oxide catalyst comprises preparation of a precursor composition, exposing said precursor composition to elevated temperatures to activate the composition, and grinding the activated composition. The preparation of the precursor composition comprises: a) forming a plasticized precursor composition from the constituents of the composition; b) discharging the plasticized precursor composition from an extruder having at least one die to form extrudates; c) allowing the extrudates to drop onto a transfer surface disposed beneath the at least one die whereby the extrudates break into pieces which come to rest on the transfer surface; d) transferring the pieces to at least one drying chamber; and e) moving the pieces, through the at least one drying chamber on an air permeable drying conveyor belt; wherein steps b) through d) are carried out under reduced pressure. The method allows the production of a multimetal oxide catalyst with uniform characteristics. Fine particles of the multimetal oxide precursor that may be generated during extrusion of the plasticized precursor composition and handling of the extrudates are removed.
摘要:
An abrasive grain is disclosed and may include a body. The body may define a length (1), a height (h), and a width (w). In a particular aspect, the length is greater than or equal to the height and the height is greater than or equal to the width. Further, in a particular aspect, the body may include a primary aspect ratio defined by the ratio of length:height of at least about 2:1. The body may also include an upright orientation probability of at least about 50%.