Tunable synthesis of propylene glycol ether from methanol and propylene oxide under ambient pressure
作者:Yu Bai、Qinghai Cai、Xiaoguang Wang、Bin Lu
DOI:10.1134/s0023158411030025
日期:2011.5
NH4AcMIMOH), were prepared and used as catalysts for catalytic synthesis of propylene glycol ether via reaction of propylene oxide (PO) with methanolunder mild reaction conditions. KAcMIMOH exhibited outstanding catalytic performance with 94.2% of conversion of PO and 99.1% of selectivity to 1-methoxy-2-propanol (MP-2) at 60°C and ambient pressure for 4 h. However, AcMIMCl-FeCl3 showed a good catalysis performance
THERMO-RESPONSIVE DRAW SOLUTE FOR FORWARD OSMOSIS AND METHOD FOR WATER DESALINATION AND PURIFICATION USING THE SAME
申请人:Lee Yan
公开号:US20140158621A1
公开(公告)日:2014-06-12
The present invention relates to a thermo-responsive draw solute that can be applied to water desalination and purification based on forward osmosis. The thermo-responsive draw solute has a molar mass of 50 to 3000 g/mol and undergoes a phase transition at a temperature of 0° C. to 70° C. The thermo-responsive draw solute creates optimum conditions for the desalination of seawater and the purification of contaminated water based on forward osmosis. The present invention also relates to a method for water desalination and purification using the thermo-responsive draw solute. The method consumes little energy for water desalination or purification, is simple to apply to water desalination or purification, and enables separation of the draw solute in a very easy manner.
Nano metal oxides such as Fe2O3, Fe3O4, CuO, NiO, ZnO and SnO2 were prepared and characterized using XRD, SEM and TEM analysis. These as-prepared metal oxide materials were used as catalysts for the etherification of methanol with propyleneoxide (PO). The results showed that α-Fe2O3 exhibited outstanding catalytic performance with 97.7% conversion and 83.0% selectivity to MP-2 at 160 °C for 8 h. Furthermore
制备了纳米金属氧化物,如Fe 2 O 3,Fe 3 O 4,CuO,NiO,ZnO和SnO 2,并利用XRD,SEM和TEM分析对其进行了表征。这些制备的金属氧化物材料用作甲醇与环氧丙烷(PO)醚化的催化剂。结果表明的α-Fe 2 ö 3表现出杰出的催化与97.7%的转化率和83.0%的选择性在160℃下进行8小时的性能MP-2。此外,研究了催化活性或选择性与表面碱度或能隙之间的关系。由于其非均相催化性质,该催化剂可以容易地回收和再利用。
Liquid crystal compounds and intermediates thereof
申请人:Wako Pure Chemical Industries, Ltd.
公开号:US05114615A1
公开(公告)日:1992-05-19
A liquid crystal compound of the formula: ##STR1## wherein m and n are independently integers of 1 to 22; k and l are independently integers of 1 to 2; and C* is an asymmetric carbon atom, is chemically stable and can be applied to liquid crystal display devices operable at room temperature.
HYDROFLUOROCARBON REFRIGERANT COMPOSITIONS AND USES THEREOF
申请人:MINOR HAVILAND BARBARA
公开号:US20070289317A1
公开(公告)日:2007-12-20
Disclosed herein are hydrofluorocarbon refrigerant or heat transfer fluid compositions that are useful in refrigerain or air conditioning apparatus or as heat transfer fluids. The compositions of the present invention are also useful in centrifugal compressor apparatus that employ two-stage compressors or single slab.single pass heat exchangers.