Multifunctional catalyst
Aldolization, Dehydration and Hydrogenation :
Methyl Isobutyl Ketone
MIBK is a good polar solvent with a moderate evaporation rate. This solvent
is primarily used in surface coatings but is also employed in pharmaceuticals,
in pesticides or in mining. As a chemical intermediate, MIBK is used in
the manufacture of rubber antiozonants, mainly N-(1,3-dimethylbutyl)-N -phenyl-p-phenylenediamine
(6PPD) and reacts with acetylene to produce acetylenic diol nonionic surfactant
used in inks, paints/coatings, adhesives, dyes/pigments and pesticides.
MIBK is historically produced by a three-step process using acetone and
hydrogen as feeds and proceeding via diacetone alcohol and mesityl oxide
intermediates.
A different catalyst is employed for each step:
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a base catalyst for aldolization,
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an acidic catalyst for dehydration and
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a selective hydrogenation catalyst for double bond removal.
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Afterwards, a single-step process from
acetone and hydrogen was commercialized by Veba-Chemie and Deutsche
Texaco in Germany. This "one-pot-reaction" is achieved using
a multifunctional catalyst. The single-step synthesis
of MIBK from acetone offers lower investment and operating costs,
and avoids the low conversion of acetone in the first stage and the
reversion of mesityl oxide to acetone in the second stage, which are
experienced in the three-step process.
Recommended Catalysts
For sampling, pricing and availability of AMBERLYSTT catalysts please contact your Rohm and Haas sales representative.
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