Introduction
Butadiene is one of the basic petrochemical materials widely used in synthetic rubber and synthetic resin. It is an important monomer for producing SBR, cis-butadiene rubber, chlorobutadiene rubber, butadiene-acrylonitrile rubber, SBS, ABS and nylon etc.
SINOPEC has independently developed Butadiene Extraction ACN Process at the beginning of 1960s, and the technology was commercialized in 1971 in Yanshan Petrochemical Company as the first plant of ten thousand tons in China. From then on, improvement has been continuously made, many sets of butadiene extraction plants with capacity over 100 Kt/a have been designed and commissioned. The biggest capacity is 200 Kt/a.
Technical Characteristics
1. Solvent with low boiling point, thus the stripper column operating pressure is high, and no compressor is needed, the process is simple and easily to be operated.
2. The operating pressure of extractive distillation column is low, thus the formation of butadiene dimers is decreased and the yield of butadiene is increased.
3. Wastewater can be easily biochemical-treated. No waste solid forms in the process.
4. The quality of raffinate is high; the concentration of butadiene is lower than 40 ppm.