Water → Methacrylic Acid

Temperature

0 °C

For each of the catalysts described herein, 3-6 cc of catalyst were mixed with sufficient quartz chips to make a total volume of 15 cc, which was placed into a downflow reactor having an internal diameter of 0.40 inches. A gas stream consisting of 3.8% methacrolein, 8.0% oxygen, 30% water and the balance as nitrogen was passed over the catalyst bed in the reactor. The volumetric flow rates were varied between 50 and 100 seem. The internal reactor temperature was varied between 275° C. and 295° C. The reactor pressure was maintained at about 1 atmosphere. The catalyst loading, flow rates and reactor temperature were adjusted such that methacrolein conversions between 70% and 95% were obtained. Reaction products were condensed into a glass trap maintained at 0° C. for a period of one to three hours. The yields of methacrylic acid, acetic acid, and acrylic acid were determined from this liquid. The amount of methacrolein, carbon dioxide, carbon monoxide, and the other byproducts were determined from on-line analysis or the reaction product stream by gas chromatography. The stability of catalysts made with these binders is shown in FIG. 1.

1. customwas placed into a downflow reactor
2. customwas varied between 275° C. and 295° C
3. temperatureThe reactor pressure was maintained at about 1 atmosphere
4. customwere obtained
5. customReaction products
6. customcondensed into a glass trap

ORD record

ord-6d100aae926445a0b9020eb689e920a3

Source dataset

uspto-grants-2012_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08178718B2