av phan viet duc för 12 årar sedan
553
Mer av detta
VCM is polymerized to PVC resin. VCM is stripped from the resin and the resin is finaly dried to produce high quality PVC resin.
(3).3 Then, EDC is subject to "cracking process" -> VCM + hydrochloric acid (HCl) as by-product.
(3).2 Oxy-Chlorination process: ethylene + hydrochloric acid + oxygen -> EDC.
(3).1 Direct Chlorination process: Chlorine (1) + Ethylene -> EDC/ethylene di-chloride, (used mainly to produce VCM)
(2) Sodium hypochlorite = Caustic Soda + Chlorine
(1) Common salt -> purified salt (dissolved in water) -> (is then electrolyzed) to Caustic soda; chlorine gas and hydrogen gas. Technology: sophisticated cationic exchange membrane technology