ALKYLATION OF ETHYLBENZENE WITH METHANOL OVER X-TYPE ZEOLITES

被引：10

作者：

HUANG, CS ^{[1
]}

KO, AN ^{[1
]}

机构：

[1] TUNGHAI UNIV,DEPT CHEM,TAICHUNG,TAIWAN

来源：

CATALYSIS LETTERS | 1993年 / 19卷 / 04期

关键词：

ALKYLATION; ETHYLBENZENE; METHANOL; X-ZEOLITES; ACID BASE CATALYSIS;

D O I：

10.1007/BF00767073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The methylation of ethylbenzene over X type zeolites was studied at atmospheric pressure and temperature of 400-500-degrees-C. Ring and side-chain alkylation take place, respectively, on the acid and base zeolite, viz. HX and KX. With KX at 500-degrees-C, alkylation and dealkylation proceed, respectively, via carbanion and carbonium ion mechanism, whereas dehydrogenation and demethylation occur via free radical mechanism. The ratio of radical to ionic activity increases with increasing contact time, reaction temperature and time-on-stream.

引用

收藏

页码：319 / 326

页数：8

相关论文

共 17 条

[1] ALKYLATION OF TOLUENE WITH METHANOL ON COMMERCIAL X-ZEOLITE IN DIFFERENT ALKALI CATION FORMS [J].

ENGELHARDT, J ;

SZANYI, J ;

VALYON, J .

JOURNAL OF CATALYSIS, 1987, 107 (02) :296-306

[2] REACTION NETWORK AND KINETICS OF P-DIETHYLBENZENE CRACKING OVER X-FAUJASITE MOLECULAR-SIEVE CATALYSTS [J].

FORNI, L ;

CARRA, S .

JOURNAL OF CATALYSIS, 1972, 26 (02) :153-&

[3] EXPERIMENTAL-EVIDENCE FOR THE ROLE OF ACIDIC SITES IN THE SIDE-CHAIN ALKYLATION OF ALKYLBENZENES WITH METHANOL [J].

ITOH, H ;

HATTORI, T ;

SUZUKI, K ;

MIYAMOTO, A ;

MURAKAMI, Y .

JOURNAL OF CATALYSIS, 1981, 72 (01) :170-171

[4] MECHANISM OF THE SIDE-CHAIN ALKYLATION OF TOLUENE WITH METHANOL [J].

ITOH, H ;

MIYAMOTO, A ;

MURAKAMI, Y .

JOURNAL OF CATALYSIS, 1980, 64 (02) :284-294

[5] ROLE OF ACID AND BASE SITES IN THE SIDE-CHAIN ALKYLATION OF ALKYLBENZENES WITH METHANOL ON 2-ION-EXCHANGED ZEOLITES [J].

ITOH, H ;

HATTORI, T ;

SUZUKI, K ;

MURAKAMI, Y .

JOURNAL OF CATALYSIS, 1983, 79 (01) :21-33

[6] INSITU INFRARED STUDY OF ALKYLATION OF TOLUENE WITH METHANOL ON ALKALI CATION-EXCHANGED ZEOLITES [J].

KING, ST ;

GARCES, JM .

JOURNAL OF CATALYSIS, 1987, 104 (01) :59-70

[7]

MALINOWSKI S, 1989, CATALYSIS, V8, pCH4

[8] INFRARED INVESTIGATIONS OF THE ALKYLATION OF TOLUENE WITH METHANOL BY ALKALI-MODIFIED ZEOLITES [J].

MIELCZARSKI, E ;

DAVIS, ME .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1990, 29 (08) :1579-1582

[9]

POUTSMA ML, 1976, ACS MONOGR SER, V171, pCH8

[10] EFFECT OF FAUJASITE CATIONS ON ACID SITES [J].

RICHARDSON, JT .

JOURNAL OF CATALYSIS, 1967, 9 (02) :182-+