Apparatus and process for producing (meth)acrylic acid

Details Apparatus and process for producing (meth)acrylic acid Apparatus and process for producing (meth)acrylic acid

2005-11-22

2005-11-22

Manoharan, Virginia (Department: 1764)

Distillation: apparatus

Apparatus

Systems

C202S267100, C203S086000, C159SDIG015, C422S240000, C562S600000

Reexamination Certificate

active

06966973

ABSTRACT:
The present invention provides an apparatus for producing (meth)acrylic acid and a process for producing (meth)acrylic acid with this apparatus wherein the apparatus enables the production of (meth)acrylic acid stably for a long period of time by effectively inhibiting the polymerization of (meth)acrylic acid in its production process (for example, in a reboiler). At least a part of the apparatus is made of a nickel-chromium-iron alloy with a molybdenum content of 3 to 20 mass %, but not including 3 mass %, or with a molybdenum content of 1 to 4 mass % and a copper content of 0.5 to 7 mass %.

REFERENCES:
patent: 3493471 (1970-02-01), Bashaw
patent: 4147885 (1979-04-01), Shimizu et al.
patent: 4350573 (1982-09-01), Kritzler et al.
patent: 5087744 (1992-02-01), Krabetz et al.
patent: 63027457 (1988-02-01), None
patent: 99/54017 (1999-10-01), None
Klimova edt al, “Corrosion resistance of materials in media for production of the methyl ester of methacrylic acid” Russian.

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