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 （%） |
| （kg/grain） | |||||
| 0.85 | 6.5 | Radial 7.0 | ≦ | ≧98 | ≧86 |
| Axial25.0 |
Chemical composition
| SiO2 | Al2O3 | CaO | MgO | K2O | Na2O | TiO2 | L.O.I. |
| ≧65 | ≦6 | ≦3 | ≧21 | ≦0.3 | ≦0.2 | ≦0.3 | ≦0.3 |
Specification
| outside diameter （mm） | thickness （mm） | high（mm） |
| 8.0±0.2 | 1.5 ±0.1 | 6.0±0.1 |
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