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Manufacture of Pyrotechnic Compositions
Published in Ajoy K. Bose, Military Pyrotechnics, 2021
Granulation is a process in which individual ingredients are made to adhere to form bigger multi- ingredient entities, called granules. The granulation process eliminates segregation feature from the composition and gives uniformity to the composition for its regular and consistent performance.
On-Line Measurement of Moisture Content
Published in Ko Higashitani, Hisao Makino, Shuji Matsusaka, Powder Technology Handbook, 2019
Wet granulation is one of the most sensitive operations to the moisture content. Wet granulation is defined as a size enlargement, which adhere/stick powders by using liquid binders to produce granules having the desired size, shape and density. The properties of the final product are influenced by the moisture content significantly.5–7 Therefore, monitoring of moisture content and its control are required to produce desired product continuously with a high accuracy.
Process Imaging
Published in David M. Scott, Industrial Process Sensors, 2018
The purpose of a granulation process is to transform powder (i.e., fine particles) or mixtures of different powders into larger particles that have a desired size distribution and bulk density. The optimal size of the granules is on the order of 1–2 mm. Compared to the powders from which they are made, granules are much more convenient to transport, store, measure, and apply; therefore many intermediate chemicals and consumer products are granulated. Typical formation processes are extrusion from a paste made from the powder, and pan or fluidized bed granulation, in which a binder solution is sprayed onto the powder while it is agitated (Iveson et al., 2001). The size and shape of the resulting granules vary within a batch of product, so these characteristics are described by distributions rather than single numbers.
Varronia verbenacea and Achyrocline satureioides essential oils in granules and microparticles: Stability and in vitro release studies
Published in Drying Technology, 2021
J. C. K. Monteiro Filho, R. A. F. Rodrigues
Granulation is a common strategy used in the pharmaceutical industry for particle standardization and the production of a great amount of viable biologically active molecules, and the resulting materials can be used as tableting powders, fast-dissolving granules (in case of effervescent drugs), or as carriers and protectors. In our study, the granules retained a greater amount of essential oils than the microparticles. The essential oil load values were higher than the value of 25% obtained by Dairiki et al.[93] for sprayed essential oil in fish food granules and similar to the results obtained by Ukita and Murakami,[28] who observed 37-55% cinnamaldehyde and anethole loads in corn starch granules. However, these results were significantly lower compared to the value obtained by Ma et al.[27] for Neusilin® granules, which retained 93% of trans-cinnamaldehyde. This great difference could have occurred due to the oil affinity of the excipients, which is greater for Neusilin® than for microcrystalline cellulose, as seen by the same authors, which hinders oil retention at the end of the process. Another important factor could also be related to the technique used by the authors (melt granulation) and the coating applied to the final granules, which improved retention.
Braking performance of friction materials: a review of manufacturing process impact and future trends
Published in Tribology - Materials, Surfaces & Interfaces, 2023
Nesrine Hentati, Fatma Makni, Riadh Elleuch
The use of wet granulation technology to produce brake friction materials is limited [68,69], despite the fact that it can improve the tribological (reduce the abrasion of rubbing surfaces) and physical (increase porosity) properties of the friction materials [70]. The wet granulation technique consists of mixing, spraying of the binder (liquide phase) into the powder, drying of the wet granular mass (with a drying oven), and screening (using a grading sieve). The desired granules are pressed using a compression moulding machines, under specific pressure, temperature, and duration.
A study on a new blended tea product using disk granulation
Published in Particulate Science and Technology, 2022
Ana P. Rehder, Alcina M. F. Xavier, Marcos A. S. Barrozo
Many industries such as chemical, ceramic, metallurgical, nuclear, food and pharmaceuticals deal with thin solid processes, being sometimes necessary to increase the size of these particles using a granulation process (Litster 2003). Granulation is a size enlargement operation by which a fine powder is agglomerated into larger granules to generate a specific size and shape, improve its flowability and appearance, and usually produce a product with desired properties (Nguyen et al. 2021). Therefore, granulation process is an example of particle design.