Shape-selective alkylation of naphthalene with isopropanol over mordenite catalysts

✍ Scribed by Chunshan Song; Stephen Kirby

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 791 KB
• Volume: 2
• Category: Article
• ISSN: 0927-6513
• DOI: 10.1016/0927-6513(94)00024-7

✦ Synopsis

Naphthalene alkylation with isopropanol was studied at 250°C using several proton-form mordenites (HM) and Y-zeolites. HM catalysts afforded 2-isopropylnaphthalene (ZIPN) as the dominant product, whereas the Y-zeolites (HY and LaHY) gave l-IPN as a major product. HM displayed better selectivity to 2-IPN and 2,6-diisopropylnaphthalene (2,6-DIPN), although HY showed higher activity for naphthalene conversion. HM catalysts with SiOJA1203 ratios of 20-35 appear to be effective for shape-selective synthesis of 2-IPN and 2,6-DIPN. These catalysts displayed over 73% /&selectivity to 2-IPN among the two IPN isomers, and over 65% /?,/?'-selectivity to the desired 2,6-DIPN among all DIPN isomers with 2,6-DIPN/2,7-DIPN ratios of about 3. The isopropanol-tonaphthalene ratios and the solvent type are also influential for both activity and selectivity of mordenite catalysts.