Iso-Propylbenzen

The yield of iso-propylbenzene is influenced considerably by the quality of the anhydrous aluminium chloride employed. It Is recommended that a good grade of technical material be purchase in small bottles containing not more than 100 g. each undue exposure to the atmosphere, which results in some hydrolysis, is thus avoided. Sealed bottles containing the reagent sometimes have a high internal pressure they should be wrapped in a dry cloth and opened with care. 

The organic sorbates used were the purest (>99%) available commercially, as were the non-sorbable solvents and internal standards 1,3,5-tri-iso-propylbenzene, 1,3-di(trifluoromethyl)benzene, mesitylene, tetramethylsilane, and cis- and trans-decalin. 

In the reverse TALSPEAK process, the An(III) + Ln(III) fraction is first coextracted from a feed, the acidity of which has to be reduced to 0.1 M by denitration or nitric acid extraction. An(III) are then selectively stripped using DTPA in citric acid (1 M) at pH 3 (hence the name reverse TALSPEAK process), and the Ln(III) are finally stripped by 6 M HN03. Attempts to apply this TALSPEAK variant to the treatment of actual UREX + raffinates are reported in the literature, but they involve several steps. The problematic Zr and Mo elements are first removed by direct extraction with HDEHP (0.8 M in di-iso-propylbenzene) from the high-acidity raffinate stream arising from the UREX + co-decontamination process (238). The remaining fission products and actinides can then be concentrated by acid evaporation and denitration processes. This concentrate is further diluted to a lower acidity (e.g., [HN03] = 0.03 M) to allow the coextraction of An(III) and Ln(III) by the TALSPEAK solvent. 

The selective oxidation of aromatic portions of molecules was demonstrated using model compounds such as toluene, ethylbenzene, n-propylbenzene and iso-propylbenzene (28.) The major oxidation products from these compounds were acetic, propionic, butyric and isobutyric acids respectively. In each case the carboxylic acid group marks the position that the aromatic unit used to occupy. 

Benzene alkylation to Ethylbenzene and Iso-propylbenzene Several processes Vapour-phase, Liquid-phase or Reactive Distillation... 

Quantum-chemical calculations by the method of Hartrii-Focks with parameters UHF and RHF 4-replaced 2,6-di-ferf.butylphenol values energy homolytic dissociation 0-H of communications - D jj are found Value energy formation and energy of homolytic cleavage D communications in molecules phenols depend on calculation approach M6 or PM3) and parameters of a method of Hartrii-Focks. There are dependences D from k reactions 4-substituted investigated 2,6-di-fert.butylphenol with iso-propylbenzene peroxide compound. Results of calculations D (Q of sterically hindered phenols in approach PM6 with parameter RHF are corrected to experimental data. 

FIGURE 1 DependencesD from Igk at inhibiting oxidation iso-propylbenzene in the... 

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