Catalyst compsns, its prepn, process and process of purifying terephthalic acid
Patents
| Language: |
Китайский |
| Type: |
Patent request |
| Number |
CN 1283521 A |
| Request number: |
00121173.0 |
| Request date: |
Jul 28, 2000 |
| patent.field.start_date: |
|
| Registration date: |
|
| patent.field.request_publication_date: |
Feb 14, 2001 |
| Authors |
Romanenko A.V.
,
Likholobov V.A.
,
Timofeeva M.N.
,
Jhung S.H.
,
Park Jun Seok
|
| Affiliations |
| 1 |
INSTITUT KATALIZA IMENI G.K. BORESKOVA SIBIRSKOGO OTDELENIA ROSSIISKOI AKADEMII NAUK
|
| 2 |
Samsung General Chemicals Co. Ltd
|
|
The present invention relates to a catalyst composition for the purification of terephthalic acid, their preparation, and terephthalic acid purification process. More preferably, the palladium or palladium for the purification of terephthalic acid a catalyst composition comprising a catalytically active material deposited on the carbon and at least one metal of Group Ⅷ crystals Periodic Table, wherein said carbon material is in the similar pore graphite material having an average pore size is 40-400A, at least 0.5 of the total pore volume of the pores, the degree of similarity is not less than 20% of graphite, wherein the metal crystals in a large amount of the carbon distribution material particles, such that the distance from the outer surface of the particle layer is equal to the distance at which 30% of the radius.