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Showing 1 to 20 of 323 for “"Crystallisation"”.
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Crystallisation thermodynamics and random forest classification for the prediction of crystallisation outcomes
Crystallisation is one of the key unit operations in the pharmaceutical industry. A wide range of crystal attributes affects the bulk particle properties of a crystalline material as well as its downstream manufacturability. Therefore, understanding and controlling the crystallisation process to …
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Crystallisation of Barium Chromate
In the present work the crystallisation of low solubility materials were studied, Barium chromate being chosen as a typical one. The increase in solubility in acid solution was examined. Also the solubility of Barium chromate in the Presence of other compounds (Urea, complexing agents) was Studied. …
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Crystallisation of PFA glasses
… and chromia were used as nucleants. Various crystallisation heat treatments were carried out and the nucleation and crystallisation behaviour was studied. A minimum MgO:CaO was found to be necessary for bulk nucleation to occur. The activation energy for viscous flow decreased with increased …
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Seperations by continuous column crystallisation
… of the apparatus. The process of column crystallisation may be considered as a multistage separation and purification technique; it is applicable to both aqueous and organic systems. In the present work the examination has been undertaken by firstly continuously crystallising a flow of …
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Novel Methods for Co-crystallisation
… the development of novel technologies for co-crystallisation along with the discovering of plumbagin co-crystal and thermodynamic interrelationship between the co-crystal polymorphs. Co-crystallisation is a fast growing field in the area of crystal design and has shown potential advantages in …
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Antisolvent crystallisation in oscillatory baffled platforms
… would otherwise be unattainable. Antisolvent crystallisation is a widely used method of crystallisation in both academia and industry. It is employed to crystallise compounds that are not amenable to other techniques such as cooling crystallisation and can be utilised to produce crystal …
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Crystallisation and crystal forms of carbohydrate derivatives
… state of organic compounds, with a background to crystallisation, including issues that can arise during crystal growth. Chapter Two is based on glucopyranuronate derivatives which are understudied in terms of their solid state forms. This chapter reports on the formation of novel glucuronamides …
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The effect of applied fields on crystallisation
The thesis provides a background on crystallisation, the effects of applied fields and summarises the techniques used for characterisation and analysis. The study of applied magnetic fields was carried out on three crystallising systems (a) sucrose, (b) lactose and (c) cocoa butter. Both sucrose …
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Antisolvent gibbsite crystallisation from synthetic Bayer liquor
… a feasible medium for the isothermal antisolvent crystallisation of gibbsite from synthetic pregnant Bayer liquor. It was found that the extent of overall gibbsite yield exhibits a power law correlation to the change in the antisolvent caustic concentration with R2 ～1 (R2 = 0.99974). This finding …
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Towards understanding fouling mechanisms in continuous crystallisation processes
… to the controlled operation of continuous crystallisation processes where extended operation under non-equilibrium conditions is required. Whilst the factors impacting on fouling have been proposed, there have been only a relatively limited number of studies into fouling mechanisms to …
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Combined wet milling crystallisation methods for particle engineering
… properties has emphasised the need for robust crystallisation processes which is a critical separation and purification technique. Mechanical milling is employed post crystallisation as an offline unit operation usually in a separate dry solids processing facility for adjusting the particle …
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Studies in the crystallisation behaviour of Potassium Nitrate
… of a continued effort in the area of industrial crystallisation research carried out within a multi-disciplinary project group. The Universal Instrumentation and Automation of Crystallisers (UNIAK) group is a co-operation between the Chemical and Mechanical Engineering departments, based in the …
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Crystallisation and chain conformation of long chain n-alkanes.
Hydrocarbon chains are a basic component in a number of systems as diverse as biological membranes, phospholipids and polymers. A better understanding of the physical properties of n-alkane chains should provide a better understanding of these more complex systems. With this aim, vibrational …
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Influence of impurities on the crystallisation of pharmaceutical materials
… on induction time and nucleation kinetics. Crystallisation from solution plays a significant role in the pharmaceutical, chemical and food industry, because it is widely used as a separation and purification technique. Nucleation is the first step of crystallisation, where the extremely …
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The co-crystallisation of sugars by the supersaturation process
… level of inclusion of the added component. Co-crystallisation appears to rely on a degree of intermolecular sugar-sugar recognition.The inclusion of a second component is not solely down to structural similarities between materials however. It appears that there are kinetic factors potentially …
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Application of machine learning methods for design of crystallisation processes
… the application of ML techniques in aspects of crystallisation process design assessing the ability to predict crystallisation outcomes, including crystal habit and non-aqueous solubility of pharmaceutical drugs in a diverse range of solvents.;High throughput screening for analysing …
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