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Research of Preparation of Pyridine from Tetrahydrofurfuryl Alcohol by Multicomponent Catalyst

Author: ZengXian
Tutor: ZhangWeiHong
School: Tianjin University
Course: Applied Chemistry
Keywords: Pyridine Tetrahydrofurfuryl alcohol Carrier Distillation Composite metal catalyst
CLC: TQ253.2
Type: Master's thesis
Year: 2007
Downloads: 64
Quote: 0
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Abstract


As an important fine chemical raw materials , pyridine and its derivatives are widely used in dyes , pharmaceuticals, pesticides , and other fields . This thesis is mainly carried on the tetrahydrofurfuryl alcohol synthesis of pyridine catalyst carrier as well as process . Tetrahydrofurfuryl alcohol and ammonia , composite metal oxide catalyst in a tubular fixed bed high-temperature catalytic synthesis of pyridine . Screening studies for preliminary work using the catalyst support is difficult to mass production of small clover -like γ-Al2O3 carrier , screened out the several better carrier instead of the original carrier . Small clover -like γ-Al2O3 load of 10 % MoO3 / Al2O3 role , pyridine yield of 71.15% . Small clover -like , thin strips , and the early use of clover -like γ -Al2O3 as the carrier of the main catalyst , and through the the cocatalyst to main catalyst for further improving the catalytic effect . In the reaction temperature of 550 ° C , tetrahydrofurfuryl alcohol flow 0.1 mL of n (THFA) : n ( NH3) = 1:4 conditions , the load on small clover -like γ-Al2O3 carrier 5 % MoO3- 5 % V2O5 -3 ? 2O3 - 2 % MgO / γ -Al2O3 catalyst , pyridine yield of 88.83% . From the raw water mixing ratio , temperature , and other aspects influencing factors on the reaction process has been studied , and the crude product distillation separation . When the proportion of raw materials in volume watered V ( tetrahydrofurfuryl alcohol ) : V ( water) = 4:1 , pyridine yield is higher . When the reaction temperature of 500 ° C , the tetrahydrofurfuryl alcohol flow 0.1 mL of n (THFA) : n (NH3 ) = 1:4 , 5 % MoO3- 5 % V2O5 - 3 ? 2O3 -2 % of MgO / γ -Al2O3 catalyst under the action of pyridine yield of 89.11% . The crude product is purified by distillation column separation , the pyridine content reached 94.71% .

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of heterocyclic compounds > Six heterocycles containing a single different atoms > Triazine (pyridine ) family
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