Divided into the following four:
1, solid acid catalyst: high temperature, strong acid
2, super solid acid catalyst: acid is very strong, but the use of temperature does not exceed 200 degrees
3, lipophilic solid acid catalyst: lipophilic strong, the use of more than 500 degrees
4, super, ultra-high temperature solid acid catalyst: high temperature, strong acidity, the use of more than 500 degrees