Title:
【発明の名称】沈澱反応のための反応物濃度制御方法及び装置
Document Type and Number:
Japanese Patent JP3325888
Kind Code:
B2
Abstract:
A method and an apparatus for controlling reactant ion concentration within a precipitation vessel to optimize the reactions occurring therein is disclosed. In one important implementation, the reactant controlled comprises halide ion in a reactor during the precipitation and growth of silver halide grains. In this embodiment, the method includes measuring the amount of halide ion within the precipitation vessel; measuring the flow rates of the halide feed stream and the silver feed stream; storing the measured halide ion concentration and measured feed stream flow rates; computing an estimated smoothed halide ion concentration value as a function of the stored measured halide ion concentration and measured feed stream flow rates; and adjustably controlling the amount of halide ion added to the precipitation vessel as a function of this estimated halide ion concentration value. Preferably, N most recent measured halide ion concentrations and measured halide and silver feed stream flow rates are stored and used in determining the estimated smoothed halide ion concentration. Mathematical algorithms are derived herein to facilitate the computation of the estimated halide ion concentration and the necessary flow rate adjustment. Analogous apparatus is also provided herein.
Inventors:
Jerome, Norman F.
Application Number:
JP51750291A
Publication Date:
September 17, 2002
Filing Date:
August 09, 1991
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
G03C1/015; G05D21/00; G05D21/02; B01J19/00; (IPC1-7): G05D21/00; B01J19/00; G03C1/015
Domestic Patent References:
| JP6165307A | ||||
| JP647942A | ||||
| JP6165305A | ||||
| JP267952A | ||||
| JP6333545A |
Other References:
ＲａｙｍｏｎｄＡ．Ｗｒｉｇｈｔ ａｎｄ Ｃｏｓｔａｓ Ｋｒａｖａｒｉｓ，ＮＯＮＬＩＮＥＡＲ ｐＨ ＣＯＮＴＲＯＬ ＩＮ ＣＳＴＲ，ＰＲＯＣＥＥＤＩＮＧ ＯＦ ＴＨＥ １９８９ ＡＭＥＲＩＣＡＮ ＣＯＮＴＲＯＬ，米国，Ａｍｅｒｉｃａｎ Ａｕｔｏｍａｔｉｃ Ｃｏｎｔｒｏｌ Ｃｏｕｎｃｉｌ，１９８９年６月，Ａｍｅｒｉｃａｎ Ａｕｔｏｍａｔｉｃ Ｃｏｎｔｒｏｌ Ｃｏｕｎｃｉｌ ｖｏｌ２，ｐ１５４０−１５４４
Attorney, Agent or Firm:
Aoki Akira (2 outside)