Abstract:
The invention relates to a method for producing alkylene oxide addition products by reaction of compounds having a nucleophilic center with alkylene oxides in a reactor having a large inner surface. The invention is characterized in that the reaction is carried out exclusively in the liquid phase.
Abstract:
Die vorliegende Erfindung betrifft ein Koppelverfahren zur Herstellung von Polyetherpolyolen ausgehend von hochfunktionellen, bei Reaktionsbedingungen festen bzw. hochviskosen Starterverbindungen und monofunktionellen, bei Reaktionsbedingungen flüssigen Starterverbindungen mit Zerewitinoff-aktiven Wasserstoffatomen.
Abstract:
A process for treating a carrier, or a precursor thereof, to at least partly remove impurities comprising contacting the carrier, or the precursor thereof, with a treatment solution comprising a salt; a process for preparing a catalyst; the catalyst; a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether or an alkanolamine.
Abstract:
The present invention relates to process wherein (+)-2-carene epoxide is coupled with a compound X-Y that contains nucleophilic and electrophilic moieties, to produce a compound of formula (5). The reaction mixture consists essentially of a source of (+)-2-carene epoxide, compound X-Y, optionally an inert solvent and optionally a pH buffer. No acid catalyst is used in the process.
Abstract:
The invention concerns a method for producing alkylene glycol diethers by reacting a linear or cyclic ether with an alkylene oxide in the presence of a Lewis acid. The invention is characterized in that the reaction is continuously carried out in a microreactor.
Abstract:
Briefly, in one aspect, this invention provides a catalytic method of preparation of primary and secondary hydrofluoroethers, the process comprising reacting a fluorinated precursor material and an alkylating agent in the presence of a Lewis acid catalyst or a mixture comprising Lewis acid and Brønsted acid catalysts.
Abstract:
Hydrolysis of olefin oxides to their corresponding glycols is catalyzed by a steam stable zeolite, in its acid form, characterized by a constraint index within the range of about 1 to 12. Conversions of the olefin oxide, in the presence of water, proceeded with minimal catalyst degradation. The acidity of the zeolite enables the use of milder conditions than generally applied for this hydrolysis with no loss of desired selectivity. In addition, the described procedure offers the advantages such as ease of separation and use of fixed bed reactor.
Abstract:
There is provided a method for producing dipropylene glycol and/or tripropylene glycol, the method comprising steps (A), (B), (C), (D), and (E) defined below, step (A): the step of reacting a raw material liquid comprising propylene oxide and water to obtain a reaction liquid comprising unreacted water, propylene glycol, dipropylene glycol and/or tripropylene glycol, and an alcohol compound excluding propylene glycol, dipropylene glycol, and tripropylene glycol, step (B): the step of separating, from the reaction liquid, a first liquid containing water and the alcohol compound and a second liquid containing the propylene glycol and the dipropylene glycol and/or tripropylene glycol and optionally containing the alcohol compound, step (C): the step of removing at least a part of the alcohol compound from the first liquid to obtain a third liquid containing water and optionally containing a part of the alcohol compound, step (D): the step of separating, from the second liquid, a fourth liquid containing the propylene glycol and optionally containing the alcohol compound, and a fifth liquid containing the dipropylene glycol and/or tripropylene glycol and optionally containing the alcohol compound, step (E): the step of recycling at least a part of the third liquid to step (A) as a component of the raw material liquid.