Abstract:

Polymers produced by the self-polymerization of butadiene is a key factor affecting the long-term safe production of butadiene extraction units, and this problem has not been solved for a long time. Affected by the self-polymerization of butadiene, the two butadiene extraction units of a petrochemical company have had production cycles ranging from 3 months to 1 or 2 years since their startup. The frequent cleaning of the filter and tower kettle reboiler as well as the leakage of some equipment due to the runaway polymerization of butadiene posed great hidden dangers and risks to the long-term safe production of the units. The "dead angle theory" for anti-polymerization was put forward, and some corresponding anti-polymerization measures were taken under the guidance of this theory. The application results show that these measures have achieved remarkable effects, and the operation cycle of the units has been successfully extended to 5 years.

Key words: butadiene, dead angle theory, anti-polymerization measures, flushing