Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1994-10-07
1996-07-16
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 4100
Patent
active
055368875
ABSTRACT:
Process for the production of tertiary ethers (MTBE, ETBE, TAME, ETAE) in which a hydrocarbon cut (1) containing four or five carbon atoms is reacted with methanol or ethanol (2, 3) in a reactor and recovering ethers (11) and a distillate (10) after distillation (C.sub.I). The distillate undergoes a first extractive distillation step in column (C.sub.11) in the presence of a solvent (27) which is selective towards olefinic hydrocarbons. A saturated hydrocarbon-rich overhead fraction (15) is recovered along with a bottom fraction (18) which is rich in olefins, solvent and alcohol. The olefins (20) are separated from the solvent and alcohol (24) in a second extractive distillation step (C.sub.III). The olefins are isomerised in a skeletal isomerisation reactor (5) and the isomerate is recycled (2) to reactor (6). The alcohol and solvent are separated in a stripping column (C.sub.IV). Alcohol (26) is recycled to the synthesis reactor (6) while the solvent (27) is recycled to C.sub.II. The temperature at the bottom of the second column (C.sub.III) can be reduced by addition of fresh (4) or recycled (34) alcohol.
REFERENCES:
patent: 5047070 (1991-09-01), Harandi
patent: 5108719 (1992-04-01), Harandi
Marceglia et al., "Snamprogetti's Associated Technologies: Skeletal isomerization of linear olefins; Isobutene via MTBE cracking Butene-1; production Etherification of alternative raw materials " Chemical Economy and Engineering Review, vol. 14, No. 6 (No. 159), pp. 35-40, Jun. 1982.
Asselineau Lionel
Mikitenko Paul
Minkkinen Ari
Institut Fracnais du Petrole
Killos Paul J.
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