Method for production of methacrylic acid

Details Method for production of methacrylic acid Method for production of methacrylic acid

2007-08-07

2007-08-07

Puttlitz, Karl (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S524000, C562S545000

Reexamination Certificate

active

10353528

ABSTRACT:
This invention is related to a shell-and-tube type reactor provided with reaction tubes packed with a catalyst and adapted to circulate a heat medium to the fluid outside the tubes and is characterized by a method introducing a gas into the catalyst beds so as to retain the relative humidity of the catalyst in the range of more than 40% while elevating the temperature of the reactor thereby starting up the reactor. This method prevents the catalyst from degradation of activity due to absorption of moisture, exalts the service life of the catalyst, and permits stable production of methacrylic acid.

REFERENCES:
patent: 3516800 (1970-06-01), Yamamoto et al.
patent: 4273676 (1981-06-01), Matsumoto et al.
patent: 4803302 (1989-02-01), Oh-Kita et al.
patent: 5153162 (1992-10-01), Kurimoto et al.
patent: 5191116 (1993-03-01), Yamamatsu et al.
patent: 5211929 (1993-05-01), Durand et al.
patent: 5276178 (1994-01-01), Onodera et al.
patent: 6410786 (2002-06-01), Onodera et al.
patent: 2001/0024630 (2001-09-01), Matsumoto et al.
patent: 2004/0171874 (2004-09-01), Watanabe et al.
patent: 0 421 875 (1990-10-01), None
patent: 1 166 865 (2001-04-01), None
patent: 60012134 (1985-01-01), None
patent: A-5-96172 (1993-04-01), None
patent: A-6-86932 (1994-03-01), None
patent: A-7-163883 (1995-06-01), None

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