1. There is more methane, ethane, isobutane and isopentane in shaly limestone than in marlite.

2. The amount of isopentane and water, the kinds of polyethers and catalysts were selected.

3. The oxidation and dehydrogen products of isopentane were analyzed by using two parallel chromatographs with preseparated column of carbon molecular sieves.

4. Isoprene could be deeply hydrogenated to isopentane on nickel catalyst.

5. A polyether premix for rigid polyurethane foam was prepared from self made polyether polyol, isopentane , water, etc.

6. This paper reviewed the methods of preparing the calibration gases of pentane and isopentane and discussed the GC analysis methods.