Organic compounds -- part of the class 532-570 series – Organic compounds – Sulfate esters
Reexamination Certificate
2011-06-28
2011-06-28
Shiao, Rei-tsang (Department: 1628)
Organic compounds -- part of the class 532-570 series
Organic compounds
Sulfate esters
C558S044000, C422S220000
Reexamination Certificate
active
07968742
ABSTRACT:
A method and a device for the sulfonation or the sulfation of organic liquid raw materials with an SO3/air mixture and other reaction gases in order to perform rapid, highly exothermic gas-liquid reactions in conventional thin-layer falling-film reactors are disclosed. The introduction of the SO3/air mixture occurs through several feed locations, which are located within (along) the reaction tube or reaction tubes or in the annular gap of annular-gap falling-film reactors. High peak temperatures, undesirable byproducts, worsening of the color and local oversulfation or oversulfonation, which leads to side reactions, are largely avoided.
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Aigner Rudolf
Reuner Horst
Marshall & Gerstein & Borun LLP
Shiao Rei-tsang
The Chemithon Corporation
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