✦ LIBER ✦
Toluene isopropylation over zeolite β and metallosilicates of MFI structure
✍ Scribed by Parimal A. Parikh; N. Subrahmanyam; Yajnavalkya S. Bhat; Anand B. Halgeri
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 541 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0926-860X
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✦ Synopsis
Abatract
The industrially important porn-cymene synthesis has been carried out by toluene isopropylation on medium pore MPI zeolites and large pore zeolite jI. The roles of crystal size and change in acidity by isomorphous substitution on para-cymene Belectivity are discweed. The external surface pamivation by silica deposition was done to differentiate the reactions taking place on the external surface and inside the zeolite channels during all&&ion. This has helped to enhance the fraction of para-cymene among cymenes to nearly 166%.