The four 3,4,5-trimethylcyclohexenes were prepared in high purity and identified by their stereospecific genesis as well as by reference to their hydrogenation products, the three 1,2,3-trimethylcyclohexanes, which also were obtained pure.(1) This investigation was performed as a part of American Petroleum Institute Research Projects 45 and 58A.
A detailed analytical scheme for the determination of different sulphur compound types in Bakr crude oil distillate fractions up to 350°C was carried out. The quantitative distribution of elemental sulphur, hydrogen sulphide, mercaptans, aliphatic sulphides, aromatic sulphides, reducible and thiophenic sulphur compound types was studied.
The four geometric isomers of the 1,2,4‐trimethylcyclohexanes, ctt, ctc, cct and ccc have been synthesized, characterized and their physical constants determined.
In the course of the work the stereospecifity of a catalytic reduction method of some olefins and the WOLFF‐KISHNER reduction of some ketones were demonstrated.
The present paper deals with the separation and distribution of n‐paraffins in Marine Belayim wax distillate fractions (300–500°C) using molecular sieves adsorption and gas chromatography.
The method used consists in dewaxing the wax distillate fractions and selectively adsorbing the n‐paraffins present in the waxes by refluxing their benzene solutions with Type 5 A pelleted molecular sieves. The sieve crystal structure is then destroyed with HF and the liberated n‐paraffins are quantitatively determined.
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