C2H6+Cl2-->C2H5CL+HCL
C2H5CL+NaOH-->C2H5OH+NaCL
C2H5OH+3O2-->2CO2+3H2O
CO2+CaO-->CaCO3
CaCO3-->CaO+CO2
CH4+CL2-->CH3CL+HCL
2CH3CL+2Na-->C2H6+2NaCL
C2H6+CL-->C2H5CL+HCL
2C2H5CL+2Na-->C4H10+2NaCL
C4H10-->C4H8+H2
C4H8+HCL-->C4H9CL
C4H9CL+NaOH-->C4H9OH+NaCL
C4H9OH-->C4H8+HOH