Ethylene yog ib qho tsis muaj xim, tsis muaj ntxhiab, thiab flammable organic compound nrog cov mis mos molecular C₂H₄. Nws muaj ob daim ntawv cog lus thiab yog ib qho yooj yim tshaj plaws unsaturated hydrocarbons. Ethylene feem ntau yog siv rau hauv kev tsim cov yas, roj hmab, thiab cov kuab tshuaj.
Chemical Structure thiab Physical Properties of Ethylene
Ethylene (C₂H₄) yog cov roj uas tsis muaj xim thiab tsis muaj ntxhiab nrog cov qauv sib txuas (CH₂=CH₂). Nws qhov hnyav molecular yog 28.05 g / mol, ntom yog 0.00126 g / cm³, kub taw tes yog -103.7 degree, thiab melting point -169.4 degree. Vim nws cov qauv tsis zoo ob npaug, ethylene tuaj yeem ua rau muaj kev cuam tshuam nrog lwm cov tshuaj, xws li propylene, esters, thiab cawv.
Ethylene yog ib qho reactive organic molecule thiab yooj yim oxidized rau cov tebchaw xws li acetaldehyde thiab acetic acid. Thaum raug rau qhov hluav taws kub los yog kub hauv huab cua, ethylene tuaj yeem hlawv, tso cua sov ntau.
Ethylene Production Methods
Kev tsim khoom lag luam ntawm ethylene yog ua tiav los ntawm cov roj refining thiab cov txheej txheem tawg. Nyob rau hauv cov txheej txheem roj refining, lub teeb hydrocarbons yog fractionated thiab ces hloov mus rau hauv ethylene los ntawm catalytic cracking los yog thermal decomposition. Tsis tas li ntawd, cov catalysts feem ntau siv rau hauv kev tsim cov ethylene, xws li hauv oxidation ntawm ethylene los tsim cov vinyl cawv thiab hydrogenation ntawm ethylene los tsim ethylene.
Daim ntawv thov ntawm Ethylene Ethylene muaj ntau hom kev lag luam, feem ntau hauv kev tsim cov yas thiab roj hmab. Vim nws lub siab polymerization reactivity, ethylene tuaj yeem hnov mob nrog lwm cov monomers los tsim ntau hom polymers, xws li polyethylene thiab polypropylene. Tsis tas li ntawd, ethylene yog siv los tsim cov kuab tshuaj, hluavtaws roj hmab, tshuaj tsw qab thiab dyes, thiab coatings.
