Gas anti-solvent recrystallization of RDX: Formation of ultra-fine particles of a difficult-to-comminute explosive

Gallagher, Paula; Coffey, Michael P.; Krukonis, Val J.; Hillstrom, Warren W.

doi:10.1016/0896-8446(92)90030-n

Cited by 141 publications

(84 citation statements)

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“…Geertman (1994) observed similar platelets during the growth of biphenyl crystals from toluene at the gas-liquid interface and Gallagher (1992) also observed the formation of platelets of RDX at the gas-liquid interface. The bulk fluid phase is not or only slightly supersaturated so the particles show here no further agglomeration or growth.…”

Section: Aiche Journalmentioning

confidence: 90%

Crystallization of phenanthrene from toluene with carbon dioxide by the GAS process

et al. 1996

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Section: Aiche Journalmentioning

confidence: 90%

Crystallization of phenanthrene from toluene with carbon dioxide by the GAS process

et al. 1996

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“…Ø Supercritical Anti-Solvent (SAS) process was firstly investigated for explosive comminuting [33]. In fact, at the difference with RESS process, the SAS process applies to most molecules, that can be dissolved in a very wide range of "strong" organic solvents.…”

Section: Silica Aerogel Samples • Particle Designmentioning

confidence: 99%

Supercritical Fluid Applications: Industrial Developments and Economic Issues

Perrut

2000

Ind. Eng. Chem. Res.

312

153

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:This lecture intends to give a brief overview of the status of Supercritical Fluid industrial applications and to draw some prospective trends. Based on the know-how gathered by SEPAREX along these 20 last years of work on many supercritical fluids applications and manufacture of more than 80 plants at pilot scale or industrial scale, economic evaluations and comments about design, maintenance and operation of supercritical fluid plants will be presented. Present status of industrial applications :During the last two decades, except for processes used in the petroleum industry -that are not in the scope of this lecture -industrial applications have been mostly developed for natural products extraction/fractionation, both for food and pharmaceutical products (Hundreds of references are available in literature ; I advice the reader to begin by [1][2][3][4][5][6][7]) . At present time, these applications are still continuing to slowly spread worldwide with a wide potential of capacity increase as high quality products are more and more required and environment/health problems are more and more taken into account.• Extraction (SFE) from solid materials is the most developed application, mainly for food products (coffee, tea,…), food ingredients (hops and aromas, colorants, vitamin-rich extracts, specific lipids, …) and nutraceuticals/ phytopharmaceuticals. Residual organic solvent or other impurities, like pesticides, are also removed from final active compounds or food ingredients/nutraceuticals (like ginseng) at large scale [1][2][3][4][5][6][7]. I estimate the number of industrial-scale SFE units now under operation on natural products about 100 (or slightly over) with a growth of about 10% per year.Some "niches" applications concern high-added value products, like delipidation of bones for allografts preparation, or specialty polymer stripping.• Fractionation (SFF) of liquid mixtures are designed to take profit of the very high selectivity of supercritical fluids with attractive costs related to continuous operation ; nevertheless, few industrial units are now used for aromas production from fermented and distilled beverages, fractionation of polyunsaturated fatty acids and polar lipids, polymer fractionation (specialty lubricants, pharmaceuticals,…), recovery of active compounds from fermentation broths, pollution abatement on aqueous streams,….• Preparative Scale Supercritical Fluid Chromatography (PSFC) is operated for ultimate fractionation of very similar compounds, especially for lipids like polyunsaturated fatty acids in a few large-scale units.•

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“…With these antisolvent methods, heat-sensitive substances can be micronized to obtain large specific surface areas and thus increased dissolution rates. Antisolvent technologies, especially antisolvent precipitation, were first mentioned in connection with micronizing explosives [17], later the techniques were applied for inorganic salts [18] and active pharmaceutical ingredients [19]. Changes in crystal structures and morphological variations [20] When gas antisolvent precipitation is combined with an extraction, it is referred to as supercritical antisolvent extraction [28], or supercritical antisolvent fractionation [29].…”

Section: Introductionmentioning

confidence: 99%

Gas antisolvent fractionation based optical resolution of ibuprofen with enantiopure phenylglycinol

Lőrincz

Tóth

Kondor

et al. 2018

Journal of CO2 Utilization

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Gas anti-solvent recrystallization of RDX: Formation of ultra-fine particles of a difficult-to-comminute explosive

Cited by 141 publications

References 1 publication

Crystallization of phenanthrene from toluene with carbon dioxide by the GAS process

Crystallization of phenanthrene from toluene with carbon dioxide by the GAS process

Supercritical Fluid Applications: Industrial Developments and Economic Issues

Gas antisolvent fractionation based optical resolution of ibuprofen with enantiopure phenylglycinol

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