Preparation of methyl ethyl ketone

Details Preparation of methyl ethyl ketone Preparation of methyl ethyl ketone

1976-11-26

1978-02-21

Thomas, Jr., James O.

Compositions

X-ray or neutron shield

260596, B01J 2316, C07C 4500

Patent

active

040751287

ABSTRACT:
Vapors of secondary butyl alcohol are directed through a bed of heat-treated pellets of compressed brass powder to provide methyl ethyl ketone. In preparing the pellets from powder, more than half of the brass powder has a particle size less than 44 microns. Less than 1% of the powder is larger than 60 mesh, that is, larger than 250 microns. A significant portion of the powder has a size range between 60 mesh and 325 mesh, i.e. smaller than 250 microns, but larger than 44 microns. The powder is desirably mixed with about 0.1 to about 1% lubricant such as stearic acid or zinc stearate. The lubricant coated powder is compressed, generally into a cylindrical pellet having a height about equal to its diameter. The pellets may desirably be about one fourth inch in diameter and about one fourth inch long. The compressed pellets are subjected to heat treatment conditions corresponding to a temperature within a range from about 900.degree. F. to about 1000.degree. F. for about one hour. Such temperature range can be expressed as about 480.degree. C. to about 540.degree. C. Without the controlled heat treatment, pellets have inadequate attrition resistance and compressive strength. When the heat treatment is at a temperature or time which are excessive, then the surface area and pore volume of the activated pellet is reduced enough to impair the advantageous activity of the catalyst.

REFERENCES:
patent: 2472493 (1949-06-01), Schneider et al.
patent: 2474440 (1949-06-01), Smith et al.
patent: 2701264 (1955-02-01), Deahl et al.
patent: 2891095 (1959-06-01), Opitz et al.
patent: 3894963 (1975-07-01), Gardes et al.

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