Microspheres are produced by contacting a solution of a macromolecule or small molecule in a solvent with an antisolvent and a counterion, and chilling the solution. The microspheres are useful for preparing pharmaceuticals, nutraceuticals, cosmetic products and the like of defined dimensions.
The present invention provides a method for producing a tertiary butyl alcohol with a high reaction rate of hydration of isobutylene. Furthermore, the present invention provides a method for producing a tertiary butyl alcohol with a high reaction rate of hydration of isobutylene even in the case of using an isobutylene of low concentration as a raw material. In this method, a tertiary butyl alcohol is produced from isobutylene and water in the presence of a cation-exchange resin catalyst and at least one solvent selected from the group consisting of sulfones and organic carboxylic acids by using a catalytic distillation apparatus. The solvent to be used in the method for producing a tertiary butyl alcohol is preferably sulfolane, dimethyl sulfone or acetic acid.
Compositions and methods to effect the release profile in the transdermal administration of active agents
申请人:——
公开号:US20020004065A1
公开(公告)日:2002-01-10
Compositions and methods for the transdermal delivery of active agents up to a period of seven days or more at substantially a zero-order release rate comprising a pharmaceutically acceptable adhesive matrix and a polymeric plastic material that provides a release rate regulating effect on the active agents.
Targetable diagnostic and/or therapeutically active agents, e.g. ultrasound contrast agents, comprising a suspension in an aqueous carrier liquid of a reporter comprising gas-containing or gas-generating material, said agent being capable of forming at least two types of binding pairs with a target.
ACROLEIN MANUFACTURING METHOD AND ACRYLIC ACID MANUFACTURING METHOD
申请人:Aoki Takanori
公开号:US20110087050A1
公开(公告)日:2011-04-14
The present invention relates to a method for producing acrolein, comprising step (1) of subjecting glycerol to dehydration reaction in the presence of a copper compound and a compound containing a heteroatom; step (2) of recovering acrolein generated in the dehydration reaction step (1); step (3) of recovering part or all of the copper compound which remained after the recovery of acrolein; step (4) of treating part or all of the recovered copper compound with at least one member selected from a group consisting of an oxidizing agent and acid; and step (5) of returning part or all of the copper compound treated in the above step to step (1); and a method for producing acrylic acid, comprising reacting acrolein obtained by the above method with molecular oxygen. The production method of the present invention enables efficient production of acrolein and acrylic acid from glycerol contained in plant oil and animal fats derived from carbon dioxide in air without depending on the oxidation of propylene derived from fossil resources.