Method for pulverizing to fine powder

Details Method for pulverizing to fine powder Method for pulverizing to fine powder

2006-02-07

2006-02-07

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Processes

By utilizing kinetic energy of projected or suspended material

C241S027000

Reexamination Certificate

active

06994283

ABSTRACT:
The present invention has for its object to provide a method of micronizing (E)-4-[2-[2-[N-acetyl-N-(4 -methoxybenzenesulfonyl)amino]phenylethenyl]pyridine 1-oxide while maintaining its crystalline.The present invention relates to a method of micronizing the above compound characterized in that the compound is comminuted, for example, to the extent that the mean particle diameter of the compound will be 1˜25 μm with 50 μm and larger particles accounting for 2% or less with a mill of the open-circuit pulverizing type.

REFERENCES:
patent: 5972976 (1999-10-01), Hidaka et al.
Matsunaga Y et al: “Effects of grinding and tableting on physicochemical stability of an anticancer drug, TAT-59” Chemical and Pharmaceutical Bulletin, vol. 44, No. 10, 1996, pp. 1931-1934, XP002196671 Tokyo (JP)*p. 1932, col. 2, line 2—p. 1933, col. 1, line 1*.

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