Regeneration of an alumopalladium hydrogenation catalyst in the process of supercritical CO2 fluid extraction
- Authors: Sagdeev K.A.1, Khazipov M.R.2, Galimova A.T.1, Sagdeev A.A.1, Gumerov F.M.2, Yarullin R.S.3
-
Affiliations:
- Nizhnekamsk Chemical Engineering Institute
- Kazan National Research Technological University
- OAO Tatneftekhiminvest Holding
- Issue: Vol 8, No 1 (2016)
- Pages: 1-8
- Section: General Problems of Catalysis
- URL: https://journals.rcsi.science/2070-0504/article/view/202087
- DOI: https://doi.org/10.1134/S2070050416010116
- ID: 202087
Cite item
Abstract
Using a specially created experimental setup, the crossover character of a change in solubility is determined, and the approximate pressure at the upper crossover point is found (≈19 MPa). The modification of carbon dioxide with chloroform is shown to increase its solubility by 2–2.5 times on average within the above range of conditions. The supercritical CO2 fluid extraction (SCFE) process is studied as it applies to the regeneration of LD-265 alumopalladium hydrogenation catalyst. Dimethylsulfoxide and ethanol are selected as cosolvents (modifiers). Maximum regeneration efficiency is established at a 5.5–6.5 wt % concentration of cosolvents, and dimethylsulfoxide proves to be a more efficient cosolvent than ethanol. The diene and bromine numbers and styrene and methylcyclopentadiene conversions obtained on catalysts regenerated via SCFE satisfy the requirements for catalytic systems used in the selective hydrogenation of dienes in a benzene–toluene–xylene fraction.
Keywords
About the authors
K. A. Sagdeev
Nizhnekamsk Chemical Engineering Institute
Author for correspondence.
Email: kamiladze@mail.ru
Russian Federation, Nizhnekamsk, Tatarstan, 423570
M. R. Khazipov
Kazan National Research Technological University
Email: kamiladze@mail.ru
Russian Federation, Kazan, Tatarstan, 420015
A. T. Galimova
Nizhnekamsk Chemical Engineering Institute
Email: kamiladze@mail.ru
Russian Federation, Nizhnekamsk, Tatarstan, 423570
A. A. Sagdeev
Nizhnekamsk Chemical Engineering Institute
Email: kamiladze@mail.ru
Russian Federation, Nizhnekamsk, Tatarstan, 423570
F. M. Gumerov
Kazan National Research Technological University
Email: kamiladze@mail.ru
Russian Federation, Kazan, Tatarstan, 420015
R. S. Yarullin
OAO Tatneftekhiminvest Holding
Email: kamiladze@mail.ru
Russian Federation, Kazan, Tatarstan, 420061
Supplementary files
