Summary:This product exists in oil and gas, wet natural gas and cracked gas, such as petrochemical light oil...
This product exists in oil and gas, wet natural gas and cracked gas, such as petrochemical light oil cracking ethylene plant, co-production of carbon tetrachloride, about 40% of ethylene production; petroleum refinery catalytic cracking unit produced carbon Tetrahydrocarbon, accounting for 6% of the device capacity, butane obtained by separation. 1, Separation of gas and wet natural gas from oilfield: after it is separated by pressure condensation and condensation, liquefied petroleum gas containing propane and butane can be obtained, and then propane and butane can be separated by distillation. 2. Separation from petroleum-cracked C4 fractions: for example, 65% butane is present in naphtha mid-depth cracking products and less butane is present in heavy fraction cracking products. Some refinery catalytic converter to molecular sieve catalyst and hydrocracking process, resulting in refinery gas butane yield increased, butylene yield decreased. The butane separation process is as follows. Exhaust gas from catalytic cracking unit, after fractionation and separation of carbon three, isobutylene and carbon five fractions, enters the first distillation column from the bottom of the column and obtains more than 90% butane from the top of the extractive distillation column.
