Improving the Technological Scheme of Isolation of Butane–Butylene Fraction by Chemisorption Using Tubular Turbulent Apparatus

• Published in: Theoretical foundations of chemical engineering Vol. 53; no. 5; pp. 741 - 746
• Main Authors: Shevlyakov, F. B., Umergalin, T. G., Shurupov, O. K., Zakharov, V. P., Nasyrov, I. Sh
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.09.2019; Springer Nature B.V
• Subjects: Ammonia; Butadiene; Chemical industry; Chemisorption; Chemistry; Chemistry and Materials Science; Copper; Elastomers; Fluid dynamics; Industrial Chemistry/Chemical Engineering; Organic chemistry; Polymers; Refineries; butadiene; chemisorption; butylene–butadiene fraction; butadiene production; butane–butylene fraction; tubular turbulent apparatus; water–ammonia solution of copper(I) acetate
• DOI: 10.1134/S0040579519050361
• ISSN: 0040-5795

The butadiene and butane–butylene fraction are products of separation of the butylene–butadiene fraction (BBF) by chemisorption. Butadiene is a diene monomer for the production of elastomers and plastics. The butane–butylene fraction is used as a feedstock for various petrochemical processes, in particular, for the preparation of C 4 oligomeric products and methyl tert-butyl ether. A residual content of butadiene in the butane–butylene fraction of more than 0.5 wt % has a negative effect when it is used as a raw material for petrochemical processes; it also reduces the yield of butadiene. The article describes the method of purification of the butane–butylene fraction from butadiene by returning the part of butane–butylene fraction mixed with a stream of absorption ammonium–copper solution in the form of reflux in the chemisorption column. Mixing of flows is carried out in a tubular turbulent apparatus mounted in a reflux line. The organization of an additional contact of part of butane–butylene fraction with copper ammonia solution will increase the sorption efficiency of the column.