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Modified zeolite shape - selective catalytic synthesis of 2,6 - isopropylnaphthalene

Author: LiuXiDong
Tutor: TangEnQi
School: Tianjin Polytechnic University
Course: Applied Chemistry
Keywords: 2,6 - isopropyl naphthalene Shape-selective Modified Zeolites Lewis acid Metal oxide
CLC: O625.151
Type: Master's thesis
Year: 2007
Downloads: 128
Quote: 0
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Abstract


In recent years, the shape selectivity of the alkylation reaction of polynuclear aromatic compounds and more attention. 2,6 - diisopropylnaphthalene (2,6-DIPN) is the synthesis of new polyester resin is poly (ethylene naphthalate) the butanediol dimethacrylate naphthalate (PEN) and polyethylene naphthalate (PBN) as well as the liquid crystal polymer matter (LCP) is an important raw material . Polynuclear aromatic compounds into the reaction and the catalyst to study both theoretical or are necessary from a practical point of view . In this paper, the alkylation of naphthalene with isopropanol synthetic route , the modified zeolite catalytic performance and reaction conditions on the reaction of isopropyl . The specific studies are as follows: 1 , under reflux , using the ion exchange the Lewis acid is immobilized on a zeolite catalyst , prepared a series of Immobilized Lewis acid - modified zeolite catalyst . 2 , under reflux , using the ion exchange method with alkaline earth metals, rare earth metal- modified zeolite catalyst , prepared a series of alkaline earth metal , rare earth metal modification of the modified molecular sieve catalyst . 3, at room temperature, the impregnation method having the Keggin structure of the heteropoly acid (PW) load on the zeolite molecular sieve , a series of load PW acid - modified zeolite catalyst was prepared . 4, at room temperature, using a liquid phase deposition or acid dealumination , to prepare a Si / NH 4 M , PDMS / NH 4 < / sub > M and different degrees dealuminated hmx . 5 , XRD, SEM / EDS, FT-IR methods such as the structure of the modified zeolite catalyst characterization, and based on these characterizations , incorporated in the catalyst of isopropyl naphthalene Catalytic performance reveals nature of their catalytic properties . 6 , with a differential reactor of its catalytic properties were evaluated to determine the optimal reaction conditions for various types of catalyst : the ratio of raw materials ( naphthoic : isopropanol: cyclohexane ) = 1:2:10 , catalyst mass 2g , weight airspeed for 3h -1 , and the reaction temperature of 280 ° C .

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Aromatic compounds > Aromatics and their derivatives > Polycyclic aromatic hydrocarbons > Naphthyl dioxide, naphthalene , tetralin,
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