1-O-alkylglycerol and diglycerol ethers are obtained in high yields and high selectivity by catalyticreductivealkylation of glycerol and diglycerol with linear aldehydes in the presence of 0.5 mol% of Pd/C under 10 bars of hydrogen using a Brønsted acid as co-catalyst. All byproducts were identified. A mechanism for the reductivealkylation is proposed.
1-O-Alkyl glycerol and di-glycerol monoethers are, respectively, obtained in high yields and selectivity by catalytic reductive etherification of mono- and di-glycerol with linear aldehydes in the presence of 0.5 mol % of Pd/C under 10 bars of hydrogen using a Bronsted acid as co-catalyst. (C) 2009 Elsevier Ltd. All rights reserved.
Percutaneous absorption accelerator and preparation containing same
申请人:Kao Corporation
公开号:EP0162239B1
公开(公告)日:1991-08-07
Process for prepapring polycerol and mixed ethers
申请人:Lemke Daniel W.
公开号:US20080306211A1
公开(公告)日:2008-12-11
Disclosed is a method of reacting glycerol to form polyglycerol or mixed ethers of glycerol or other alcohols (e.g., polyols). In some embodiments, the method comprises reacting glycerol in the presence of a fatty acid-containing compound and a metal catalyst to form polyglycerol. In other embodiments, the method comprises reacting glycerol and/or an alcohol in the presence of a fatty acid-containing compound and a metal catalyst to form a mixed ether.
METHOD FOR TREATING A LITHOGRAPHIC PRINTING PLATE
申请人:Maessen Peter
公开号:US20100137180A1
公开(公告)日:2010-06-03
A method for treating a lithographic printing plate including the step of applying a liquid containing a surfactant to the plate, characterized in that the surfactant includes at least one hydrophilic segment including polyglycerol, and at least one hydrophobic segment selected from an optionally substituted alkylene group, an alkyl or aryl substituted poly(meth)acrylate, an optionally substituted polyester, polyether, polyurethane, polycarbosilane, polysiloxane, polystyrene and/or a polymer including a perfluoroalkyl group with the proviso that the liquid is not applied as a fountain solution.