FIELD: industrial organic synthesis.
SUBSTANCE: in two-stage isoprene production process via dehydration of isopentane, contact gas produced in each stage is condensed and non-condensed hydrocarbons are absorbed and then desorbed. Hydrocarbon condensate is separated by rectification to give low-boiling hydrocarbon distillate fraction and bottom product. The latter is separated with the aid of extractive rectification to give isopentane and isoamylene fractions after the first dehydration stage and isoprene and isoamylene fractions after the second dehydration stage. Non-condensed low-boiling hydrocarbon vapors recovered after rectification are combined with non-condensed hydrocarbons from the first dehydration stage, preliminarily compressed, separated, and subjected to absorption.
EFFECT: maximized utilization of C5-hydrocarbons leading to reduced consumption of isopentane.
2 dwg, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING ISOPRENE | 2017 |
|
RU2654863C1 |
| METHOD FOR JOINT PRODUCTION OF ISOPRENE AND 3-METHYLBUTENE-1 | 1992 |
|
RU2030374C1 |
| PROCESS FOR PREPARING BOTH ISOPRENE AND 3-METHYLBUTENE-1 | 1992 |
|
RU2032649C1 |
| POLYISOPRENE RUBBER PRODUCTION PROCESS | 1999 |
|
RU2193570C2 |
| BUTYL RUBBER PRODUCTION PROCESS | 2002 |
|
RU2238953C2 |
| METHOD OF PROCESSING WASTE OF ISOPRENE PRODUCTION | 1985 |
|
SU1274255A1 |
| METHOD OF PROCESSING ISOPENTANE | 1994 |
|
RU2111202C1 |
| METHOD OF ISOLATING BUTADIENE AND BUTYLENES | 0 |
|
SU1159916A1 |
| METHOD OF SEPARATING ISOPRENE FROM AN ISOAMYLENE-ISOPRENE FRACTION BY EXTRACTIVE RECTIFICATION | 2018 |
|
RU2701153C1 |
| METHOD OF COMPLEX PROCESSING OF BY-PRODUCTS OF ISOPRENE SEPARATION FROM FRACTION C5 PYROLYSIS | 2017 |
|
RU2659079C1 |
