1. For example, can be butane or isobutane.

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

3. Isobutane occurs in crude oil and natural gas, except biogenic gas.

4. The key for isobutane dehydrogenation is to synthesize non - noble mental catalysts.

5. From the isobutane alkylation with butene at the presence of acidic catalyst, alkylate is the ideal blend composition of gasoline.

6. From the isobutane alkylation with butene at the presence of acidic catalyst, alkylate is the ideal blend component of automobile gasoline.

7. Isobutane is typically used as a co - blowing agent with other hydrocarbons, so the effect of its low boiling point is somewhat diluted.

8. The chemical ionization(CI)mass spectra of a series of terpene functional group positional isomers and stereoisomers have been studied using ammonia and isobutane as reagent gases.

9. Using this system, lower explosion limits of methane mixing respectively with Hydrogen, Isobutane and normal hexane were determined.

10. Recent progress of the catalysts, reaction routes and mechanism of isobutane dehydrogenation is reviewed.

11. Refining processes with concentrated sulfuric acid or hydrogen fluoride as catalyst are currently being used for the manufacture of alkylation gasoline from isobutane and light olefins from FCCU.

12. The product of propane gas chromatography, second is the highest percentage of butane and isobutane is, The content of olefins are relatively low.

13. The EPA, in a May 10 proposed rule, recommended four refrigerants as possible substitutes for use in commercial refrigerators and freezers: isobutane, propane, HCR-188C,( ) and HCR-188C1.

14. Ten of them were identified. They are ethylene, propylene, isobutane, cyclobutane, three isomeric butenes, methyl ethyl ether, ethyl isopropyl ether, and ethyl acetate.

15. The green production processes in substitute of ACH mainly include isobutene processes, ethylene processes, isobutane processes and methyl acetylene processes, which will be discussed in this paper.

16. This paper elucidates the present situation of research and development of solid acid catalysts for the alkylation of isobutane with butene.