The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1996
Filed:
Oct. 07, 1994
Ari Minkkinen, St Nom la Breteche, FR;
Paul Mikitenko, Noisy le Roy, FR;
Lionel Asselineau, Paris, FR;
Institut Fracnais du Petrole, Rueil Malmaison, FR;
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.