US 2003/0190563 A1 · Production method of silver halide photographic emulsion and production apparatus thereof

Abstract

At least one of a nucleus forming process, a nucleus growing process, a chemical sensitizing process, and a spectral sensitizing process for producing a silver halide photographic emulsion is performed by using a microreactor. A minute region of the microreactor is used to precisely perform a reaction of nucleus formation. A condition under which host grains are allowed to react with newly supplied silver halide nuclei is made uniform to cause uniform crystal growth. A predetermined quantity of molecules for chemical sensitization is doped in a crystal lattice of a nucleus of silver halide to effect a sensitizing process. Alternatively, a spectral sensitizing process in which a single molecular layer of a spectral sensitizer is uniformly adsorbed on a silver halide nucleus grain surface is securely carried out.

Claims18

Dependent claims

A production method of silver halide photographic emulsion, comprising a nucleus forming process, a nucleus growing process, a chemical sensitizing process, and a spectral sensitizing process, wherein

at least one of the nucleus forming process, the nucleus growing process, the chemical sensitizing process, and the spectral sensitizing process is performed by using a microreactor.

A production apparatus of silver halide photographic emulsion, which performs a nucleus forming process, a nucleus growing process, a chemical sensitizing process or a spectral sensitizing process, comprising:

a first liquid guiding pipe that collects process liquids processed by using plural microreactors for performing the nucleus forming process, and thereafter feeds the liquids to a next process;
a second liquid guiding pipe which is connected to the first liquid guiding pipe for distributing and supplying the process liquids to plural microreactors which has a processing capacity equivalent to all of the processing capacities of the plural microreactors for performing the nucleus forming process for performing the nucleus growing process;
a third liquid guiding pipe which collects the process liquids processed by using the plural microreactors for performing the nucleus growing process, and thereafter feeds the process liquids to a next process;
and
a fourth liquid guiding pipe for distributing and supplying the process liquids for the chemical sensitizing process or the spectral sensitizing process to plural microreactors.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/345,406Filed 16 Jan 2003

Priority

JP 2002-1055318 Jan 2002

Published

9 Oct 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification25 codes

B01F 33/3011
Using specific means for arranging the streams to be mixed, e.g. channel geometries or dispositions: using a sheathing stream of a fluid…
B01F 25/3132
Wherein additional components are introduced in the centre of the conduit: by using two or more injector devices
B01F 25/31324
By using two or more injector devices: arranged concentrically
B01F 31/86
Mixing by means of high-frequency vibrations above one kHz, e.g. ultrasonic vibrations: with vibration of the receptacle or part of it

Production method of silver halide photographic emulsion and production apparatus thereof

Life of this patent

Production method of silver halide photographic emulsion and production apparatus thereof

Life of this patent

Abstract

Claims18