Producing more methyl tert-butyl ether by reprocessing post-esterification C4 fractions in deep catalytic cracking unit
In order to increase the production of methyl tert-butyl ether(MTBE)by using C4 re-sources,the changes of operating parameters,ma-terial balance,product distribution,product prop-erties,energy consumption and so on were investi-gated by reprocessing post-esterification C4 frac-tions in the deep catalytic cracking(DCC)unit of Ningbo Daxie Petrochemical Co Ltd of CNOOC.The results showed that after reprocessing 6.88 t/h of post-esterification C4 fractions and 10.06 t/h of gas fractionation C4 fractions in DCC unit,some isobu-tane and n-butane components were circulated in the system.Isobutane in gas fractionation C4 frac-tions decreased from 31.48%to 29.83%,and the yield of LPG and ethylene increased by 1.18 and 0.11 percentage points respectively.The propylene yield decreased by 0.09 percentage points,and the energy consumption(in standard oil,the same be-low)increased by 0.24 kg/t.Processing load in MTBE unit increased by 17.93 percentage points,production of MTBE increased by 2.69 t/h,the yield increased by 1.16 percentage points,output of post-esterification C4 fractions decreased by 2.56 t/h,the energy consumption decreased by 4.78 kg/t.
deep catalytic crackingreprocessC4 fractionsmethyl tert-butyl etherisobutyleneener-gy consumption
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