Process for preparing silver halide emulsion using a sulfur-cont

Details Process for preparing silver halide emulsion using a sulfur-cont Process for preparing silver halide emulsion using a sulfur-cont

1976-06-07

1977-09-06

Louie, Jr., Won H.

Gas separation: apparatus

Solid sorbent apparatus

96107, 96 94R, G03C 102, G03C 128

Patent

active

040465764

ABSTRACT:
A process is disclosed for the continuous formation of radiation-sensitive silver halide emulsions. In the course of reacting a silver salt with a halide salt in the presence of a peptizer to form a radiation-sensitive silver halide emulsion a portion of the emulsion is withdrawn continuously from the reaction chamber while silver halide grain formation is occurring. The silver halide grains are formed in the presence of a sulfur-containing silver halide ripening agent, while the total halide ion concentration is concurrently controlled and maintained at less than 0.01 molar.

REFERENCES:
patent: 3271157 (1966-09-01), McBride
patent: 3320069 (1967-05-01), Illingsworth
patent: 3519426 (1970-07-01), Halwig
patent: 3773516 (1973-11-01), Gutoff
Photographic Science and Engr., "Nucleation and Crystal Growth Rates During Precipitation of Silver Halide Photographic Emulsions", vol. 14, No. 4, July-Aug., 1970.
Photographic Science and Engr., "Ammoniacal Emulsions, vol. 15, No. 3, May-June, 1971.
Zelikman, et al., "Making and Coating Photographic Emulsions," Focal Press, pp. 228-234.
M. A. Larson, et al., Crystal Size Distributions from Multistage Crystallizers," Chem. Engr. Progress Symposium Series, 67, No. 110, 97-107, 1971.

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