Title:
ブテンから軽質オレフィンとイソプレンを製造する方法
Document Type and Number:
Japanese Patent JP2011504476
Kind Code:
A
Abstract:
Process for the selective production of ethylene, propylene and isoprene from light hydrocarbons comprising:
a) fractionating a butane fraction in a de-isobutanizer to obtain an enriched iso-butane fraction and an enriched normal-butane fraction,
b) cracking said normal-butane fraction and
optionally an ethane fraction,
optionally a propane fraction,
in a non-catalytic cracking zone to produce an olefin rich stream,
c) treating said olefin rich stream in a separating section to recover:
an ethylene stream,
a propylene stream,
d) transforming the recovered iso-butane of step a) into iso-butene or t-butyl hydroperoxide or partly into iso-butene and partly into t-butyl hydroperoxide,
e) optionally reacting iso-butene of step d), if any, with formaldehyde to make isoprene,
f) optionally reacting t-butyl hydroperoxide of step d), if any, with an olefin to give an epoxide and t-butanol and further separating t-butanol,
or optionally having t-butyl hydroperoxide of step d), if any, decomposed to t-butanol and reacted with formaldehyde to give isoprene,
or reacting a part of the t-butyl hydroperoxide of step d) with an olefin and having the remaining part decomposed to t-butanol and reacted with formaldehyde to give isoprene,
g) dehydrating the t-butanol recovered at step f), if any, into iso-butene and reacting said iso-butene with formaldehyde to make isoprene,
or reacting directly the t-butanol recovered at step f), if any, with formaldehyde to make isoprene,
or dehydrating the t-butanol recovered at step f), if any, into iso-butene, hydrogenating said iso-butene to iso-butane and oxidizing said iso-butane into t-butyl hydroperoxide, and recycling said t-butyl hydroperoxide,
or dehydrating the t-butanol recovered at step f), if any, into iso-butene, then disproportionating said iso-butene and propylene recovered at step c) (or 2-butene recovered at step c)), separating an isoamylene stream and converting the isoamylene into isoprene by dehydrogenation,
or making any combination of above routes of said step g),
h) optionally disproportionating iso-butene of step d), if any, and propylene recovered at step c) (or 2-butene recovered at step c)), separating an isoamylene stream and converting the isoamylene into isoprene by dehydrogenation,
at least one of steps e), f) and h) is not optional.
Inventors:
Bellmeiren, walter
Francois, Bouvar
Francois, Bouvar
Application Number:
JP2010534476A
Publication Date:
February 10, 2011
Filing Date:
November 20, 2008
Export Citation:
Assignee:
Total Petrochemicals Research Ferry Yui
International Classes:
C07C1/247; C07C4/04; C07C5/333; C07C11/04; C07C11/06; C07C11/18
Domestic Patent References:
| JPS6263530A | 1987-03-20 |
Foreign References:
| US4091046A | 1978-05-23 | |||
| US5523502A | 1996-06-04 |
Attorney, Agent or Firm:
Takashi Koshiba
Hiroshi Koshiba
Hiroshi Koshiba