SOLID CATALYST FOR PROPYLENE POLYMERIZATION AND A METHOD FOR PREPARATION OF POLYPROPYLENE USING THE SAME
申请人:KIM Sang Yull
公开号:US20120172551A1
公开(公告)日:2012-07-05
A solid catalyst for propylene polymerization includes titanium, magnesium, halogen and a maleate compound as an internal electron donor. A method for preparing propylene using the catalyst is also described. According to the present invention, it is possible to prepare polypropylene having a wide molecular weight distribution.
A stereoselective synthesis of substituted maleic esters by use of phosphonates
作者:R. K. Huff、C. E. Moppett、J. K. Sutherland
DOI:10.1039/j39680002725
日期:——
The condensation of α-keto-esters with the anions of α-phosphonato-esters yields mainly substituted maleic esters and little or none of the corresponding fumarates.
α-酮酯与α-膦酰基酯的阴离子的缩合主要产生取代的马来酸酯,很少或没有相应的富马酸酯。
Jondiko, Isaac J. O.; Pattenden, Gerald, Journal of the Chemical Society. Perkin transactions I, 1983, # 2, p. 467 - 470