Jet mill

About: Jet mill is a(n) research topic. Over the lifetime, 803 publication(s) have been published within this topic receiving 5686 citation(s).

Plasma whirl reactor apparatus and methods of use

Abstract: An apparatus for synergistically combining a plasma with a comminution means such as a fluid kinetic energy mill (jet mill), preferably in a single reactor and/or in a single process step is provided by the present invention. Within the apparatus of the invention potential energy is converted into kinetic energy and subsequently into angular momentum by means of wave energy, for comminuting, reacting and separation of feed materials. Methods of use of the apparatus in the practice of various processes are also provided by the present invention.

Methods and apparatus for making particles using spray dryer and in-line jet mill

Abstract: Methods and apparatus are provided for making particles comprising: (a) spraying an emulsion, solution, or suspension, which comprises a solvent and a bulk material (e.g., a pharmaceutical agent), through an atomizer and into a primary drying chamber, having a drying gas flowing therethrough, to form droplets comprising the solvent and bulk material dispersed in the drying gas; (b) evaporating, in the primary drying chamber, at least a portion of the solvent into the drying gas to solidify the droplets and form particles dispersed in drying gas; and (c) flowing the particles and at least a portion of the drying gas through a jet mill to deagglomerate or grind the particles. By coupling spray drying with “in-line” jet milling, a single step process is created from two separate unit operations, and an additional collection step is advantageously eliminated. The one-step, in-line process has further advantages in time and cost of processing.

Micronization of pharmaceutical substances in a spiral jet mill

Abstract: Many studies have been conducted to help understand the effects of the variables involved in jet milling. The first part of this work is an attempt to summarise the results published in the literature concerning horizontal and vertical jet mills. This focuses on the research of the optimal design of the mills and on the improvement of their performance. Several publications have been found, concerning mineral grinding. It seemed more interesting to present results on organic crystals' jet milling in the second part of this paper. The experiments concern three organic substances, and were run on three different spiral jet mills: Chrispro-Jetmill 50 and 100 and MicronMills 8″. The results are presented in terms of specific energy consumption with an adaptation of the correlation proposed by Sarma. These representations show that, within the operating energy range and above a critical energy value, the creation of specific surface area corresponds to an increase of fine particles production.

The effect of crystal morphology and mill type on milling induced crystal disorder

Abstract: Milling is a key process in the preparation of many solid dosage forms. One possible milling induced change is the production of small levels of disorder or amorphous material found predominantly at the surface of a powder, which could lead to significant chemical and physical instability. The influence of crystal habit on this change was investigated using β-succinic acid, in plate like and needle like morphologies. β-Succinic acid crystals with these habits were processed in a ball mill and a jet mill. SEM images indicated jet milled material was finer than the ball milled product. Powder X-ray diffraction of the milled powders revealed an amorphous halo at lower angles and peak broadening suggesting disorder though this could not be quantified accurately. In addition, a partial conversion during milling to the alpha form was noted. Quantitation of the alpha form in the milled powders indicated it was present at

Production of toner

Abstract: PURPOSE:To prevent the floating of magnetic powder from a toner surface by long-period agitation by forming a toner in such a manner that the magnetic powder is tightly adhered onto the surface of the electrostatically charged toner sticking onto the surface of a photosensitive drum. CONSTITUTION:A resin, coloring matter, etc. are measured and mixed. A synthetic resin is melted or softened by a heating kneader, etc., and the coloring matter, etc., are uniformly dispersed into the resin. The kneaded mixture is cooled to permit the easy crushing thereof and the cooled mixture is crushed to 1-3mm size by a hammer mill or cutter mill, etc.; further, the crushed mixture is pulverized to 3-50mum by using a jet mill. The powder of large grain sizes is removed and similarly the powder of very small grain sizes is removed in order to make the powder grain size (toner grain size) uniform. The toner is then put into a softened state by using a heating kneader, etc., and the magnetic powder having the grain size smaller than the toner grain size is added to such toner and is uniformly mixed therewith. The mixed toner is cooled in order to tightly adhere the magnetic powder thereto. The resultant toner has the magnetic powder tightly stuck to the surface.