Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2008-01-22
2008-01-22
Puttlitz, Karl (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S254000
Reexamination Certificate
active
07321053
ABSTRACT:
A process for the manufacture of a tocyl acylate or a tocopheryl acylate comprises reacting tocol or a tocopherol with an acylating agent in the presence of a solid heterogeneous Brönsted acid catalyst, said catalyst being an inorganic Brönsted acid on a solid carrier material which comprises silicon dioxide, titanium dioxide or both silicon dioxide and titanium dioxide, or being an organofunctional polysilonaxe featuring sulpho groups, the solid heterogeneous Brönsted acid catalyst further featuring a BET surface area from about 10 m2/g to about 800 m2/g and a pore volume from about 0.1 ml/g to about 2.0 ml/g. The main commercial form of vitamin E, being (all-rac)-α-tocopheryl acetate, can be manufactured by acylation of (all-rac)-α-tocopherol according to this process.
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Bonrath Werner
Giraudi Lisa
Bryan Cave LLP
DSM IP Assets B.V.
Puttlitz Karl
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