THE ROLES OF BRONSTED AND LEWIS SURFACE ACID SITES IN ACID-TREATED MONTMORILLONITE SUPPORTED ZNCL2 ALKYLATION CATALYSTS

被引：20

作者：

MASSAM, J ^{[1
]}

BROWN, DR ^{[1
]}

机构：

[1] LEEDS METROPOLITAN UNIV,CATALYSIS RES UNIT,LEEDS LS1 3HE,W YORKSHIRE,ENGLAND

来源：

CATALYSIS LETTERS | 1995年 / 35卷 / 3-4期

关键词：

CLAY; MONTMORILLONITE; ACID TREATMENT; ACID ACTIVATION; SUPPORTED CATALYSTS; ZNCL2; CLAYZIC; ALKYLATION; SURFACE ACIDITY;

D O I：

10.1007/BF00807190

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 catalyst known as ''clayzic'' (ZnCl2 supported on acid-treated montmorillonite) exhibits both Bronsted and Lewis surface acidities. The relative catalytic activities of these two types of acid site have been determined in a range of reactions, by comparing the activities of clayzic with those of related catalysts which exhibit only one type of surface acidity. Acid-treated montmorillonite has been used as the Bronsted acid catalyst in this comparison, and ZnCl2 supported on a mesoporous silica has been used as the Lewis acid catalyst. The results confirm that the relative activities of the two types of acid site depend on both the nature of the reaction and the polarity of the reaction medium. They will be of value in optimising the choice of support and the ZnCl2 loading in clayzic-type catalysts for specific reactions.

引用

页码：335 / 343

页数：9

共 10 条

[1] EXPLANATION OF AN UNUSUAL SUBSTITUENT EFFECT IN THE BENZYLATION OF ANISOLE AND IDENTIFICATION OF THE ORIGIN OF THE ACTIVE-SITES IN CLAYZIC [J].

BARLOW, SJ ;

BASTOCK, TW ;

CLARK, JH ;

CULLEN, SR .

TETRAHEDRON LETTERS, 1993, 34 (20) :3339-3342

[2] MONTMORILLONITE SUPPORTED TRANSITION-METAL SALTS AS FRIEDEL-CRAFTS ALKYLATION CATALYSTS [J].

CLARK, JH ;

KYBETT, AP ;

MACQUARRIE, DJ ;

BARLOW, SJ ;

LANDON, P .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1989, (18) :1353-1354

[3]

CLARK JH, 1994, J CHEM SOC P2, V2, P1117

[4] ON THE TRANSITION-STATE FOR CLAYZIC-CATALYZED FRIEDEL-CRAFTS REACTIONS UPON ANISOLE [J].

CORNELIS, A ;

LASZLO, P ;

WANG, S .

TETRAHEDRON LETTERS, 1993, 34 (24) :3849-3852

[5] SIDE-PRODUCT INHIBITION OF THE CATALYST IN ELECTROPHILIC AROMATIC SUBSTITUTIONS AND FRIEDEL CRAFTS REACTIONS [J].

CORNELIS, A ;

LASZLO, P ;

WANG, SF .

CATALYSIS LETTERS, 1993, 17 (1-2) :63-69

[6]

DAVISTER M, 1993, TETRAHEDRON LETT, V34, P533

[7] AN INFRARED STUDY OF PYRIDINE ADSORBED ON ACIDIC SOLIDS CHARACTERIZATION OF SURFACE ACIDITY [J].

PARRY, EP .

JOURNAL OF CATALYSIS, 1963, 2 (05) :371-379

[8] SURFACE-PROPERTIES AND POROSITIES OF SILICA AND ACID-TREATED MONTMORILLONITE CATALYST SUPPORTS - INFLUENCE ON ACTIVITIES OF SUPPORTED ZNCL2 ALKYLATION CATALYSTS [J].

RHODES, CN ;

BROWN, DR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1993, 89 (09) :1387-1391

[9] STRUCTURAL CHARACTERIZATION AND OPTIMIZATION OF ACID-TREATED MONTMORILLONITE AND HIGH-POROSITY SILICA SUPPORTS FOR ZNCL2 ALKYLATION CATALYSTS [J].

RHODES, CN ;

BROWN, DR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (15) :2269-2274

[10] INVERSION OF THE RELATIVE REACTIVITIES AND SELECTIVITIES OF BENZYL-CHLORIDE AND BENZYL ALCOHOL IN FRIEDEL-CRAFTS ALKYLATION WITH TOLUENE USING DIFFERENT SOLID ACID CATALYSTS - AN ADSORPTION RELATED PHENOMENON [J].

YADAV, GD ;

THORAT, TS ;

KUMBHAR, PS .

TETRAHEDRON LETTERS, 1993, 34 (03) :529-532

← 1 →