Method and apparatus for manufacturing silver halide grains

Details Method and apparatus for manufacturing silver halide grains Method and apparatus for manufacturing silver halide grains

1987-05-22

1992-03-17

Kunemund, Robert

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

423 42, 423 46, 423225, 423227, 423230, 423231, 422209, C01B 900

Patent

active

050966901

ABSTRACT:
A method and apparatus for manufacturing silver halide grains wherein a water-soluble silver salt solution and a water-soluble halide solution are separately introduced within a hollow cylindrical structure open at each end which is rotatable mounted about its longitudinal axis within a reaction vessel containing a colloidal aqueous solution. The colloidal aqueous solution within the cylindrical structure is stirred and mixed during the addition of the silver salt solution and halide solution and the silver halide grains which form within the cylindrical structure are immediately discharged into the colloidal aqueous solution between the outer circumference of the cylindrical structure and the reaction vessel through slits in the circumference of the cylindrical structure. The silver halide grains are uniformly produced and grown without crystallite within a narrow size distribution range and the process may be scaled up from experimental to commercial scale without loss of desired characteristics and with high produced reproducibility.

REFERENCES:
patent: 1720196 (1929-07-01), Bailey et al.
patent: 2208637 (1940-07-01), Jones et al.
patent: 4289733 (1981-09-01), Saito et al.
Perry et al., "Chemical Engineer's Handbook", Fifth Ed., 21-6 to 21-8 (McGraw-Hill Book Company).

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