Question

Từ metan và các chất cần thiết nêu phương pháp điều chế cao su buna.

Answer 1

\(2CH_4 \xrightarrow{1500^o,làm\ lạnh\ nhanh} C_2H_2 + 3H_2\\ 2C_2H_2 \xrightarrow{t^o,xt,p} C_4H_4\\ C_4H_4 + H_2 \xrightarrow{t^o,xt} CH_2=CH-CH=CH_2\\ nCH_2=CH-CH=CH_2 \xrightarrow{t^o,p,xt} (-CH_2-CH=CH-CH_2-)_n\)

Answer 2

\(2CH_4\underrightarrow{^{1500^0C},lln}C_2H_2+3H_2\)

\(2CH\equiv CH\underrightarrow{^{t^0,p,xt}}CH\equiv C-CH=CH_2\)

\(CH\equiv C-CH=CH_2+H_2\underrightarrow{^{\dfrac{Pd}{PbCO_3},t^0}}CH_2=CH-CH=CH_2\)

\(nCH_2=CH-CH=CH_2\underrightarrow{^{t^0,p,xt}}\left(-CH_2-CH=CH-CH_2-\right)_n\)

Answer 3

\(2C_2H_2\text{ }\text{ }\underrightarrow{t^o,xt}\text{ }\text{ }C_4H_4\)

\(C_4H_4+H_2\text{ }\text{ }\underrightarrow{t^o,Pd}\text{ }\text{ }CH_2=CH-CH=CH_2\)

\(nCH_2=CH-CH=CH_2\text{ }\text{ }\underrightarrow{t^o,xt,p}\text{ }\text{ }\left(-CH_2-CH=CH-CH_2-\right)n\) ( Cao su buna  )