通过双分子合成法合成了(CTA)1/3 [Cu 46(C 9 H 3 O 6)24(OH)12 ](PW 12 O 40)3 ·xH 2 O(COK-15b)的新材料MOF。模板方法,在无溶剂条件下,以化学计量比将季戊四醇与脂肪酸酯化为相应的季戊四醇四酯时,具有很高的活性和选择性,并具有高达98%的收率。通过TEM,SEM,TG,BET,TPD和Py-IR对COK-15b进行了表征。此外,研究了COK-15b的稳定性,可以将其重复使用5个运行周期而不会出现明显的失活。
Microwave-promoted synthesis of polyolesters for lubrication oil using a composite catalyst in a solvent-free procedure
作者:Fengxiu Zhang、Guangxian Zhang
DOI:10.1039/c0gc00351d
日期:——
rapid, highly efficient and green synthetic approach to polyol esters for lubrication oils is proposed. Using sulfuric acid and p-toluene sulfonic acid as a composite catalyst and C5–C9 straight-chain monocarboxylic acids, with pentaerythritol (PE) and dipentaerythritol (di-PE) as starting materials, a series of lubricationoil polyol esters were synthesized in the absence of solvent under microwave
A lubricating composition is provided comprising a high viscosity ethylene-alphaolefin oligomer copolymer having a viscosity of over 3500 to 175,000 centistokes at 100°C; a low viscosity synthetic hydrocarbon and/or a low viscosity ester; and optionally an additive package to impart desirable performance properties to the composition.
A lubricating composition is provided containing: a high viscosity synthetic hydrocarbon such as high viscosity, liquid hydrogenated polyisoprene olefin having a viscosity of greater than 3500 to 175,000 centistokes at 100°C; a low viscosity synthetic hydrocarbon and/or a low viscosity ester; and optionally an additive package to impart desirable performance properties to the composition.
Non-polymer thickened multigrade engine oils based on synthetic basestocks are provided. The SAE 5W-30, SAE 10W-30 and SAE 15W-40 engine oils are derived from hydrogenated decene-1 oligomer mixtures wherein the oligomers range from C30 up to C70+ and are present in specified proportions. Synthetic esters may be combined with the polyalphaolefin oligomer mixture. The synthetic basestocks are formulated with appropriate performance additives to obtain engine oils which meet the desired API Service Requirements for gasoline and/or diesel engine usage. In addition to specified oligomer distributions, the polyalphaolefins have specified viscosities, molecular weights and branching.
Ashless or low-ash synthetic base compositions and additives therefor
申请人:ETHYL PETROLEUM ADDITIVES, INC.
公开号:EP0480644A1
公开(公告)日:1992-04-15
An ashless or low-ash oleaginous liquid composition comprising a major amount of hydrogenated poly-α-olefin oligomer fluid having a viscosity in the range of 2 to 10 mm²·s⁻¹ at 100°C, and minor amounts of at least the following: A)hydrogenated poly-α-olefin oligomer fluid having a viscosity in the range of 40 to 120 mm²·s⁻¹ at 100°C; and B) antiwear/extreme pressure agent selected from phosphorus-containing ashless dispersant, boron-containing ashless dispersant, and phosphorus- and boron-containing ashless dispersant. Compositions of this type can be formed having excellent high and low temperature viscosity characteristics and excellent shear stability. To this end, the preferred compositions are devoid or substantially devoid of conventional polymeric high molecular weight viscosity index improvers.