Talc ring carrier

Talc ring carrier

main used in oxidation of o-xylene to phthalic anhydride catalyst carrier,Is a V2O5-TiO2 series of supported catalyst carrier,The supported V2O5-TiO2 series catalyst is suitable for the production of “60-90 g process” fixed bed o-xylene oxidation of anhydrous phthalic anhydride.Using three-stage bed filling, each catalyst has different activities and selectivities,The catalyst has the advantages of good selectivity, low reaction temperature, short induction period, high space velocity, high yield, high operation flexibility, no need to add SO2 during the reaction.

Preparation of the carrier

Selection stable source of inert non-porous talc, adding viscosity, sintering a wide range of clay as a binder, calcium, magnesium minerals as a flux.Using squeeze ring molding process, the drying, calcined,get talc carrier.The active components and additives are sprayed on the carrier by spraying, and then the finished catalyst is obtained through the processes of drying, calcining and the like.

Physical properties

Dulk density (g/cm3)   Hardness(class) Point pressure intensity Permeability (%) Acid resistance         (%) Alkali resistance           (%)
0.85 6.5 Radial 7.0 ≧98 ≧86

Chemical composition

SiO2 Al2O3 CaO MgO K2O Na2O TiO2 L.O.I.
≧65 ≦6 ≦3 ≧21 ≦0.3 ≦0.2 ≦0.3 ≦0.3


outside diameter (mm)   thickness (mm)  high(mm)  
8.0±0.2 1.5 ±0.1 6.0±0.1