20178-33-0Relevant academic research and scientific papers
METHOD OF CONVEYING LIQUIDS
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Page/Page column 8, (2012/05/20)
The present invention relates to a method of continuously conveying a liquid which is used as starting material in a chemical reaction by means of a displacement pump having physically separate forward-transport valves and a liquid-filled bidirectional flow line between displacement pump and forward-transport valves, wherein an auxiliary liquid which is a product or a starting material of the chemical reaction and has a melting point which is below the melting point or below the saturation temperature of the liquid to be conveyed is present in the bidirectional flow line. The present invention additionally provides for the use of a product formed by hydrogenation of an aromatic compound as auxiliary liquid for conveying an aromatic compound and also the use of an alcohol or an ester derived from alcohol and carboxylic acid as auxiliary liquid for conveying carboxylic acids or carboxylic acid derivatives.
Hydrogenation of bisphenol A - Using a mesoporous silica based nano ruthenium catalyst Ru/MCM-41 and water as the solvent
Yen, Clive H.,Lin, Hsin Wei,Tan, Chung-Sung
scheme or table, p. 121 - 126 (2012/06/01)
A green approach to the hydrogenation of bisphenol A (BPA) including the selection of catalysts and solvents was demonstrated in this report. The catalyst preparation was also using a simple and green method for synthesizing a silica-supported ruthenium catalyst (Ru/MCM-41) in supercritical carbon dioxide. The characterizations of the Ru/MCM-41 nanocomposites were preformed by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). The nanoparticles have an average size of 3.4 nm which is smaller than the pore size of MCM-41. The hydrogenation of BPA was carried out in a hydrogen pressure of 50 bars and a temperature range from 75 to 85 °C with different catalysts and solvents combinations. It was found that using the synthesized catalyst Ru/MCM-41 in water medium could achieve the highest efficiency and durability for the hydrogenation of BPA.
