Processes for the manufacture of isobutylene, polyisobutylene, and derivatives thereof

A process to convert a feed, comprising:

• introducing a feed comprising isobutylene to an oligomerization catalyst in an oligomerization reactor to form a first reactor effluent comprising one or more oligomers of isobutylene;
• introducing the first reactor effluent to a first distillation unit to form a first distillation effluent and a second distillation effluent, the second distillation effluent comprising one or more oligomers of isobutylene;
• introducing the second distillation effluent to a cracking reactor to form a cracking reactor effluent, the cracking reactor effluent comprising a high purity isobutylene;
• introducing the first distillation effluent to an isomerization reactor to form an isomerized product effluent, the isomerized product effluent enriched in isobutylene;
• combining the isomerized product effluent with the feed comprising isobutylene;
• and
• introducing the isomerized product effluent to the oligomerization reactor.

An apparatus comprising:

• a feed line coupled to a first end of an oligomerization reactor;
• a first distillation unit coupled with a second end of the oligomerization reactor;
• a first end of a cracking reactor coupled to a second end of the first distillation unit via a first line;
• an isomerization reactor coupled to:
• a third end of the first distillation unit at a first end of the isomerization reactor;
• and
• the feed line.