Optimization of 4,4-Dimethyl-1,3-dioxane Synthesis Conditions in Condensation of tert-Butanol with Formaldehyde over Zeolites A and X

The paper describes linear optimization of process conditions for condensation of tert- butanol with aqueous formaldehyde in the presence of synthetic zeolites (CA-Y, NaA-Y, CaA-Y, NaX, and CaX) and phosphoric acid as catalysts. The process was carried out in an autoclave at 100–150°C, 0.5–0.6 MPa,...

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Bibliographic Details
Published in:Petroleum chemistry 2022-10, Vol.62 (10), p.1249-1253
Main Authors: Tukhvatshin, V. S., Talipova, G. R., Talipov, R. F.
Format: Article
Language:English
Subjects:
Butanol
Chemistry
Chemistry and Materials Science
Condensates
Dioxane
Formaldehyde
Industrial Chemistry/Chemical Engineering
Optimization
Parameters
Phosphates
Phosphoric acid
Reaction time
Selectivity
Zeolites
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Summary:The paper describes linear optimization of process conditions for condensation of tert- butanol with aqueous formaldehyde in the presence of synthetic zeolites (CA-Y, NaA-Y, CaA-Y, NaX, and CaX) and phosphoric acid as catalysts. The process was carried out in an autoclave at 100–150°C, 0.5–0.6 MPa, and a stirring speed of 60 rpm. The selectivity towards 4,4-dimethyl-1,3-dioxane (DMD) as a target product in the Prins reaction involving tert- butanol was investigated as a function of optimization parameters such as reaction time, temperature, reactant ratio, phosphoric acid content, and synthetic zeolite type. For each “parameter vs. DMD selectivity” function, an extremum point corresponding to the optimal parameter value was found. In the presence of NaA-Y, the DMD selectivity reached 98%.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544122100085