SOLID CATALYST FOR OLEFIN POLYMERIZATION AND PROCESS FOR PRODUCING OLEFIN POLYMER
申请人:Sumitomo Chemical Company, Limited
公开号:US20130072648A1
公开(公告)日:2013-03-21
A solid catalyst for olefin polymerization and a process for producing an olefin polymer are provided. The polymer has a small content of a component which is dissolved out into a low temperature organic solvent, such as a low-molecular weight component and an amorphous component. The solid catalyst is obtained by bringing a solid catalyst component for olefin polymerization containing a titanium atom, a magnesium atom, a halogen atom, and an aliphatic carboxylate; an organoaluminum compound; and a compound represented by formula (I) into contact with each other:
wherein R
1
is a hydrocarbyl group having 1 to 10 carbon atoms, R
2
is a hydrogen atom, a halogen atom or a hydrocarbyl group having 1 to 16 carbon atoms, and the R
1
the R
2
groups are independently the same or different, and the respective R
1
groups and R
2
groups may be joined with each other to form a ring.
HIGH-PURITY ISOPROPYL ALCOHOL AND METHOD FOR MANUFACTURING SAME
申请人:TOKUYAMA CORPORATION
公开号:US20220002641A1
公开(公告)日:2022-01-06
Provided is a high-purity isopropyl alcohol in which the concentration of a C7-12 acetal compound is 100 ppb or less on a mass basis, the concentration of the acetal compound in an accelerated test involving heating for 4 hours at 80° C. in a nitrogen atmosphere is increased by a factor of 30 or less with respect to the value thereof prior to heating, and the concentration of the acetal compound is maintained at a value of 100 ppb or less on a mass basis. Also provided is a method for manufacturing said high-purity isopropyl alcohol.
[EN] HIGH-PURITY ISOPROPYL ALCOHOL AND METHOD FOR MANUFACTURING SAME<br/>[FR] ALCOOL ISOPROPYLIQUE DE HAUTE PURETÉ ET PROCÉDÉ DE FABRICATION CORRESPONDANT<br/>[JA] 高純度イソプロピルアルコール及びその製造方法
[UO2(OTf)2] reduces a series of aromatic and aliphatic aldehydes and ketones into their corresponding alcohols with moderate to excellent yields, using iPrOH as a solvent and a reductant. The reaction proceeds under mild conditions (80 °C) with an optimized catalytic charge of 2.3 mol % and KOiPr as a cocatalyst. The reduction of aldehydes (1–10 h) is faster than that of ketones (>15 h). NMR investigations