Shape-selective isopropylation of naphthalene over dealuminated mordenites
- Penn State Univ., University Park, PA (United States)
In effort to enhance the economic feasibility of coal liquefaction we are continuing the investigation of non-fuel applications for coal-derived liquids (CDL). Conversion of a small fraction of the naphthalene can significantly increase value, while the majority of the CDL is used as transportation fuel. This study is aimed at the regioselective alkylation of naphthalene. Of particular interest is 2,6-diisopropylnaphthalene (2,6-DIPN) that, when oxidized to the corresponding diacid, can be polymerized to produce high-value engineering plastics and liquid crystalline polymers. Mordenites having high selectivity for 2,6-DIPN production have been reported in a patent by Fellmann et al. at Catalytica, Inc. However, fundamentals of the alkylation process are poorly understood. Our research is directed at optimizing 2,6-DIPN selectivity through control of reaction parameters. Effects of temperature, identity of the alkylating agent, naphthalene to catalyst ratio, and addition of water are discussed. An understanding of catalyst physical and chemical properties is pertinent to the design of shape-selective catalysts. Beyond chemical analysis, X-ray powder diffraction has been used to measure crystallinity, cell constants, and crystallite size.
- OSTI ID:
- 254825
- Report Number(s):
- CONF-940813--
- Country of Publication:
- United States
- Language:
- English
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