Process for producing isoprene

Details Process for producing isoprene Process for producing isoprene

2004-03-24

2008-10-28

Caldarola, Glenn (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Diolefin product

C585S603000, C585S606000, C585S607000, C585S608000, C585S639000, C585S642000

Reexamination Certificate

active

07442844

ABSTRACT:
A process for producing isoprene is provided, which includes continuously or intermittently supplying isobutylene and/or t-butanol, formaldehyde and water into an acidic aqueous solution, and reacting the reaction mixture while distilling away a mixture containing produced isoprene, water, unreacted starting materials and other low boiling point components from this reaction mixture to the outside of the reaction system, wherein the reaction is carried out while controlling the concentration of high boiling point byproducts, which is produced and accumulated in the reaction mixture, to fall within the range of 0.5-40 mass %.

REFERENCES:
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patent: 4511751 (1985-04-01), Ninagawa et al.
patent: 4593145 (1986-06-01), Ninagawa et al.
patent: 50-62905 (1975-05-01), None
patent: 59-70623 (1984-04-01), None
patent: 2 128 637 (1999-04-01), None

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