solid acid characterization的用法和样例：
- It was proposed that the catalytic amination of metyl t-butyl ether by solid acid was a promising "green" process.
- Solid acid catalyst can be substituted for sulphuric acid as esterification catalyst.
- The solid acid showed a high catalytic activity. At 3 h reaction time, the convertion of acetic acid reached 97.7%.
- A new solid acid based on heteropolyacid has been proved to be a useful catalyst for the synthesis of dibutyl maleate.
- It point out th solid acid catalyst that we have atudied are all good catalyst for synthesis of diamyl meleat.