| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 568866000 | Preparing from ether | 9 |
| 568867000 | From alkylene oxide | 9 |
| 20090005612 | METHOD OF MAKING ALKYLENE GLYCOLS - Methods and systems for preparing alkylene glycols are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and solubility of alkylene oxides with water. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time. | 01-01-2009 |
| 20090099393 | SOLID CATALYST USEFUL FOR CONVERTING AN ALKYLENE OXIDE TO AN ALKYLENE GLYCOL - A solid (i.e., heterogeneous) catalyst useful for preparing an alkylene glycol from the corresponding alkylene oxide as well as a process for the catalytic hydration of an alkylene oxide to an alkylene glycol utilizing such a catalyst are provided. The catalyst of the present invention is based on an ion exchange resin including polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene. The ion exchange resin further includes quaternary ammonium groups or quaternary phosphonium groups. The process includes reacting water and an alkylene oxide in at least one reactor under conditions to form an alkylene glycol, wherein the at least one reactor includes a catalyst based on an ion exchange resin that includes polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene. | 04-16-2009 |
| 20090326283 | Method and device for the production of alkylene oxide addition products - A method for the production of alkylene oxide addition products comprising (i) charging a stirred reactor with a starting compound capable of adding on or inserting alkylene oxides, introducing at least one alkylene oxide plus a different diluent gas, wherein a portion of said alkylene oxide reacts in a liquid phase with said starting compound, and the remaining alkylene oxide together with said diluent gas forms a gas phase above the liquid phase, (ii) continuously drawing off said liquid phase from the bottom of the reactor via an outlet stub, and recycling to the top of the reactor via an external circulation system, which comprises at least one heat exchanger and at least one Venturi nozzle within said external circulation system, and (iii) metering said gas phase comprising alkylene oxide into said Venturi nozzle via a vacuum line. | 12-31-2009 |
| 20100222615 | METHOD OF MAKING ALKYLENE GLYCOLS - Herein disclosed is a method of hydrating an alkylene oxide. In an embodiment, the method comprises (a) introducing an alkylene oxide into water to form a first stream; (b) flowing the first stream through a high shear device to produce a second stream; and (c) contacting the second stream with a catalyst in a reactor to hydrate the alkylene oxide and form an alkylene glycol. In some embodiments, alkylene oxide comprises ethylene oxide, propylene oxide, butylene oxide, or combinations thereof. In some embodiments, producing the second stream comprises an energy expenditure of at least about 1000 W/m | 09-02-2010 |
| 20110301389 | ALKANEDIOL COMPOSITION, PROCESS FOR PRODUCING THE SAME, AND COSMETIC - A less malodorous alkanediol composition, a process for producing the alkanediol composition efficiently, and a cosmetic containing the alkanediol composition are provided. An alkanediol composition contains 0.005 parts by mass or less of ester compound per 100 parts by mass of alkanediol compound having four or more carbon atoms. An alkanediol composition contains 0.2 parts by mass or less of dioxane compound per 100 parts by mass of alkanediol compound having four or more carbon atoms. Furthermore, an ether-containing dihydric alcohol is preferably 0.3 parts by mass or less per 100 parts by mass of alkanediol compound. | 12-08-2011 |
| 20120136178 | PROCESS FOR THE PREPARATION OF ETHYLENE GLYCOL - The invention provides a process for the production of ethylene glycol from ethylene. An ethylene glycol stream comprises inorganic chloride contaminants and the process comprises steps of converting the inorganic chloride contaminants to 2-chloroethanol by reaction with ethylene oxide in one or more dehydration columns, and removing 2-chloroethanol in a waste water stream. | 05-31-2012 |
| 20120226078 | METHOD OF MAKING ALKYLENE GLYCOLS - Methods and systems for preparing alkylene glycols are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and solubility of alkylene oxides with water. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time. | 09-06-2012 |
| 20130030223 | METHOD OF MAKING ALKYLENE GLYCOLS - Herein disclosed is a method of hydrating an alkylene oxide that includes introducing an alkylene oxide into water to form a first stream; flowing the first stream through a high shear device to produce a second stream; and contacting the second stream with a catalyst in a reactor to hydrate the alkylene oxide and form an alkylene glycol. | 01-31-2013 |
| 20140316167 | METHOD FOR PRODUCING ALKANEDIOL - Provided by the present invention is a method for producing an alkanediol, such as 1,5-pentanediol, with a high reaction selectivity thereto by reacting a cyclic ether group-containing methanol such as tetrahydrofurfuryl alcohol by using a non-chromium catalyst not containing chromium atom. More specifically, the method is to produce an alkanediol having hydroxy groups at both molecular terminals shown by the formula (2), includes reacting a cyclic ether group-containing methanol shown by the formula (1) with hydrogen in the presence of a metal catalyst which contains copper atom, at least one co-existing atom selected from the group consisting of elements of the third to the sixth periods of the II to XIV groups (excluding chromium) in the periodical table and lanthanide elements. | 10-23-2014 |
