摘要:
A process for removing ruthenium or ruthenium-containing compounds from a reaction mixture comprising a compound of the following formula I in an organic solvent using supercritical fluid processing techniques: wherein RA, R3, R4, D and A are as defined herein. This invention has particular application for removing ruthenium-containing catalyst and ruthenium-containing catalyst by products from reaction mixtures that result from ring-closing olefin metathesis (RCM) reactions.
摘要翻译:一种使用超临界流体处理技术在有机溶剂中从包含下式I化合物的反应混合物中除去含钌或含钌化合物的方法:其中R A,R 3, D S,R 4,D和A如本文所定义。 本发明特别适用于通过由闭环烯烃复分解(RCM)反应产生的反应混合物的产物除去含钌催化剂和含钌催化剂。
摘要:
A process for removing ruthenium or ruthenium-containing compounds from a reaction mixture comprising a compound of the following formula I in an organic solvent using supercritical fluid processing techniques: wherein RA, R3, R4, D and A are as defined herein. This invention has particular application for removing ruthenium-containing catalyst and ruthenium-containing catalyst by products from reaction mixtures that result from ring-closing olefin metathesis (RCM) reactions.
摘要翻译:一种使用超临界流体处理技术在有机溶剂中从包含下式I化合物的反应混合物中除去含钌或含钌化合物的方法:其中R A,R 3, D S,R 4,D和A如本文所定义。 本发明特别适用于通过由闭环烯烃复分解(RCM)反应产生的反应混合物的产物除去含钌催化剂和含钌催化剂。
摘要:
A method for repeatedly converting a solvent from a state of solvent to a state of antisolvent with relatively little loss of solvent. The method is used to allow for processing of large amounts of solute material with minimum amounts of solvent.
摘要:
Disclosed is a method of small particle precipitation, retention and dispersion of a solid or semi-solid material onto or into a carrier material. In this method, solute particles are precipitated from a pressurized gaseous fluid solution or a liquid solution and effectively retained and dispersed within a carrier material. This technique can be advantageously used in pharmaceutical processing to produce a blend of solid or semi-solid material particles and carrier material, a granulation of the solid or semi-solid material particles with carrier material, carrier material partially or fully coated with the solid or semi-solid material particles, or mixtures thereof.
摘要:
A method and an apparatus useful for the production of microparticles and nanoparticles are disclosed in which a compressed fluid and a solution including a solvent and a solute are introduced into a nozzle to produce a mixture. The mixture is then passed out of the nozzle to produce a spray of atomized droplets. The atomized droplets are contacted with a supercritical antisolvent to cause depletion of the solvent in the droplets so that particles are produced from the solute. Preferably, these particles have an average diameter of 0.6 .mu.m or less. The invention can be used in the pharmaceutical, food, chemical, electronics, catalyst, polymer, pesticide, explosives, and coating industries, all of which have a need for small-diameter particles.
摘要:
The present invention relates to buckminsterfullerenes or related condensed carbon molecules covalently bonded to a polymer particle or a siliceous support particle and their use for packing media for column chromatography.
摘要:
Tamper-resistant pharmaceutical compositions have been developed to reduce the likelihood of improper administration of drugs, especially drugs such as opioids. The tamper-resistant compositions retard the release of drug, even if the physical integrity of the formulation is compromised (for example, by chopping with a blade or crushing) and the resulting material is placed in water, snorted, or swallowed. However, when administered as directed, the drug is slowly released from the composition as the composition is passes through the GI tract.
摘要:
Methods for removing soluble material from confined spaces within substrates such as containers, capsules and porous powders comprising extraction with supercritical fluids, the pressure of which is preferably modulated between an upper level and a lower level within a relatively narrow range of fluid pressure and density. The method permits enhanced extraction efficiency, catalytic reaction rates and ability to maintain catalyst activity.