ALKENE OLIGOMERS PRODUCTION PROCESS Russian patent published in 2002 - IPC

FIELD: petrochemical processes. SUBSTANCE: C3- and/or C4- and/or C5-alkenes are subjected to chemical conversion in presence of acidic ion-exchange catalysts and inert and/or low-reactive hydrocarbons and/or polar substances followed by distillation of at least unreacted hydrocarbons. Oligomerization conditions are controlled to maintain in reaction products leaving reaction zone no more than 15% and preferably no more than 3% oligomers with number of carbon atoms exceeding predetermined number. After distilling away at least major part of unreacted hydrocarbons, residue is separated by rectification into stream including dimmers and/or oligomers with lower number of carbon atoms and bottom product containing basically oligomers with specified number of carbon atoms. EFFECT: facilitated process control. 15 cl, 4 dwg, 9 ex