The product stream is distilled to produce a first overhead stream comprising water and isobutylene and a first bottoms stream comprising diisobutylene and tertiary butyl alcohol. Water is separated from the first overhead stream, and the resulting isobutylene-enriched stream is recycled back to the reaction step.The first bottoms stream is distilled to produce a second overhead stream comprising tertiary butyl alcohol and a bottoms product stream comprising diisobutylene.his example shows that the use of a single distillation tower with a side draw is ineffective for removing water from the TBA recycle stream (line 4), or from the isobutylene recycle stream (line 5).
Over time, sludge builds up inside the radiator and the coolant becomes less effective, which will hurt your engine performance and gas mileage. Flushing your radiator regularly, usually once every two to five years, will keep you car running smoothly.
You may need to flush the catheter: 1  Before giving yourself a medicine or treatment. 2  After giving yourself a medicine or treatment. 3  Once a day, if you use the PICC or midline catheter often.  Once a week, if you do not use the PICC or midline catheter often.