In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 47, No. 3 ( 2023), p. 1256-1267
Abstract:
A series of acid–base-loaded γ-Al 2 O 3 catalysts was applied as the catalysts for the isomerization of 3/4-methyl-tetrahydro phthalic anhydride. With a basic metal (K or Na) as the basic source and phosphorus (P) as the acid source, γ-Al 2 O 3 was modified by equal volume immersion. NH 3 /CO 2 -TPD, XRD, TEM/EDS, BET, and TGA were used to analyze the catalysts, and 15%-K/Al 2 O 3 and 10%-P/Al 2 O 3 were determined as the most appropriate catalysts. The isomers were qualitatively and quantitatively analyzed using nuclear magnetic resonance ( 1 H-NMR) and infrared spectroscopy (IR), and the reaction mechanism for the isomer formation was proposed. With 3-MTHPA as the substrate, the acid/base reaction temperature was 165/150 °C, the reaction time was 3 h and the amount of the catalyst added was 3%. A new type of continuous isomeric fixed-bed reactor was designed. The stability of the catalyst was tested, and the activity loss was 4.6–6.6% after 10 hours of operation.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1472933-7
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