| 发明名称 |
Preparation of para-xylene by toluene methylation |
| 摘要 |
A silica catalyst that retains its high initial activity for a longer time is obtained by forming the catalyst from an aquasol that was obtained by mixing an alkali metal aluminate with an aqueous solution of alkali metal silicate.
|
| 申请公布号 |
US4935574(A) |
申请公布日期 |
1990.06.19 |
| 申请号 |
US19890325612 |
申请日期 |
1989.03.13 |
| 申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
D'AMORE, MICHAEL B.;PANDE, NUTAN K. |
| 分类号 |
B01J21/08;B01J21/12 |
主分类号 |
B01J21/08 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
