PROCESS FOR PRODUCTION OF 2,3-DICHLOROBUTADIENE-1,3
申请人:REDWINE TERRY WAYNE
公开号:US20090163745A1
公开(公告)日:2009-06-25
2,3-dichlorobutadiene-1,3 of high purity is produced from 1,2,3,4-tetrachlorobutane by a process comprising the steps of dehydrochlorination, chlorination of the reaction product obtained in the dehydrochlorination step and subsequent separation of a 2,3-dichlorobutadiene-1,3 composition from the reaction product of the chlorination step.
Amphiphilic and Phase-Separable Ionic Liquids for Biomass Processing
作者:Ashley J. Holding、Mikko Heikkilä、Ilkka Kilpeläinen、Alistair W. T. King
DOI:10.1002/cssc.201301261
日期:2014.5
One main limiting factor for the technoeconomics of future bioprocesses that use ionicliquids (ILs) is the recovery of the expensive and potentially toxic IL. We have demonstrated a new series of phase‐separable ionicliquids, based on the hydrophobic tetraalkylphosphonium cation ([PRRRR]+), that can dissolve lignin in the neat state but also hemicellulose and high‐purity cellulose in the form of
Aromatic ethers and process for producing aromatic ethers
申请人:——
公开号:US20040181099A1
公开(公告)日:2004-09-16
According to a production process, aromatic ethers are producible by reacting phenols with an oxirane compound with use of an anion exchange resin as a catalyst. According to another production process, aromatic ethers having an alcoholic hydroxyl group are producible by a crystallization-purification step of using a solvent having a solubility parameter ranging from 7.5 to 12.5 for purification by crystallization. Further, according to still another production process, producible are aromatic ethers having an alcoholic hydroxyl group, wherein the content of a metal in the aromatic ethers is less than 100 ppm by mass, and the content of a halogen element in the aromatic ethers is less than 100 ppm by mass.
Process for preparing pyridine-substituted amino ketal derivatives
申请人:Aventis Pharma Deutschland GmbH
公开号:US20040158073A1
公开(公告)日:2004-08-12
The present invention relates to an efficient process for preparing derivatives of 1-(pyridinyl)-1,1-dialkoxy-2-aminoethane of the formula (I), with which compounds of the formula (I) can be prepared in high purity and yield and in the form of the free base without isolating the acetylpyridine oxime of the formula (XI) which is a critical product from a safety point of view as a solid.
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Process for production of 2,3-dichlorobutadiene-1,3
申请人:REDWINE TERRY WAYNE
公开号:US20090163746A1
公开(公告)日:2009-06-25
Purified chlorinated alkenes are produced by a process in which a mixture of i) a first chlorinated alkene that has at least one beta-chlorine substituent and no alpha-chlorine substituents and ii) a second chlorinated alkene that has at least one alpha-chlorine substituent is contacted with chlorine in an amount sufficient to further chlorinate the second chlorinated alkene, but which is insufficient to cause conversion of more than 20% of the first chlorinated alkene. The resultant reaction product may be easily enriched to provide a chlorinated alkene product wherein a) the weight percentage of chlorinated alkenes having at least one beta-chlorine substituent and no alpha-chlorine substituents, based on the total weight of the chlorinated alkenes present in the enriched chlorinated alkene product compared to b) the weight percentage of chlorinated alkenes having at least one beta-chlorine substituent and no alpha-chlorine substituents, based on the total weight of the chlorinated alkenes present in the mixture prior to chlorination is increased by at least 0.25 wt. %.