Agitating – Having specified feed means – Impinging jets
Reexamination Certificate
1997-12-22
2001-05-08
Soohoo, Tony G. (Department: 1723)
Agitating
Having specified feed means
Impinging jets
C366S173100
Reexamination Certificate
active
06227694
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a high speed collision reaction method for causing a chemical reaction between two kinds of substance by high speed collision.
To mix and react two or more reactive substances, there has been known a method which uses a batch-type reactor including an agitation chamber. In this method, two or more substances are supplied into the agitation chamber simultaneously or successively, and are reacted with each other by agitation in the agitation chamber. Also, there has been known a method which uses a reactor including an agitation flow passage, such as a static mixer. The agitation flow passage is provided with blades therein to cause turbulence. In this method, two or more substances are flowed in the agitation flow passage, and are reacted with each other by agitation in the agitation flow passage.
In the method using a batch-type reactor, two or more substances are supplied from different sources into a fixed volume agitation chamber simultaneously or successively, and are agitated for a specified time to cause a reaction between the substances. When the reaction is completed or reaches an equilibrium state, a product is removed. However, this method has the following problems. If a state change occurs in a reaction system, e.g., the viscosity of the reactive substance increases or the substances are not agitated uniformly, the reaction efficiency consequently decreases. Also, if an unmixable part is created and remains in a reaction system for a long time, the unmixable part aggregates into a considerable mass, thus making it difficult to produce a finely dispersed mixture.
Further, keeping the reaction system in the fixed chamber for a long time inevitably causes changes in the physical and chemical conditions. For example, the amount, concentration, and pH of reactive substances will vary over time. It is very difficult to maintain the reaction system at constant conditions. In the batch-type reaction method, in principle, the reaction is conducted per batch. To improve this drawback, there has been proposed a reactor system in which a plurality of agitation chambers are connected in series to perform a continuous reaction. In this case, however, the concentration of reactive substances changes as they travel from an initial chamber to a final chamber. Usually, the concentration decreases toward the final chamber. Accordingly, the reaction efficiency decreases toward the final chamber. Thus, it has been very difficult to attain the required reaction efficiency.
On the other hand, the method using the agitation flow passage also has the following problems. In this method, blades or other special elements are provided in the agitation flow passage to forcibly generate turbulence. A primary substance is flowed in a direction or circulated in the agitation flow passage while it is in a state of turbulence. A secondary substance is joined to the flow of the primary substance to cause a reaction between the substances. However, contact between the primary substance and the secondary substance inevitably occurs before the secondary substance enters the region of turbulence, consequently causing a heterogeneous reaction for a short time. Further, even if two or more substances come into contact at the same time to cause a homogeneous reaction, a high reaction efficiency cannot be attained.
There has been known another method which uses an ejector. In this method, a large flow of primary substance is produced. A secondary substance is ejected into the large flow of primary substance at a high speed to react with the primary substance. However, this method is not suitable when the substances have a high viscosity or when the reaction product has a high viscosity. Further, the control of substance mixing proportion is very difficult. Accordingly, this method cannot be applied in other than a limited field.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a high speed collision reaction method which has overcome the problems in the prior art.
According to an aspect of the present invention, a method for causing a reaction between two or more reactive substances comprises the step of colliding a flow of one reactive substance against a flow of another reactive substance at a high flow rate to cause a reaction between them.
In this method, the flows of reactive substances are collided against each other at a high speed to cause a reaction. Accordingly, very fine particles can be produced more efficiently. Also, since the reaction is attained for a very short time, the conditions for the reaction can be controlled more easily.
The above and other objects, features and advantages of the present invention will become more apparent upon a reading of the following detailed description and drawings.
REFERENCES:
patent: 2751335 (1956-06-01), Carver et al.
patent: 3190846 (1965-06-01), Lipton et al.
patent: 3306342 (1967-02-01), Savlo et al.
patent: 3410531 (1968-11-01), Baker
patent: 3692283 (1972-09-01), Sauer et al.
patent: 3833718 (1974-09-01), Reed
patent: 3847375 (1974-11-01), Kuerten et al.
patent: 3849074 (1974-11-01), Ficklinger et al.
patent: 4043486 (1977-08-01), Wisbey
patent: 4289732 (1981-09-01), Bauer et al.
patent: 4378335 (1983-03-01), Boden et al.
patent: 4440320 (1984-04-01), Wernicke
patent: 4474310 (1984-10-01), Muller et al.
patent: 4523696 (1985-06-01), Commette et al.
patent: 4568003 (1986-02-01), Sperry et al.
patent: 4595565 (1986-06-01), Tenhagen
patent: 4773564 (1988-09-01), Wallner
patent: 4854713 (1989-08-01), Soechtig
patent: 4876071 (1989-10-01), Toda et al.
patent: 5181987 (1993-01-01), Breuker et al.
patent: 5223550 (1993-06-01), Hughes et al.
patent: 5246673 (1993-09-01), Hed
patent: 5312596 (1994-05-01), Proksa et al.
patent: 5380089 (1995-01-01), Karasawa
patent: 5562883 (1996-10-01), Salisbury et al.
patent: 3633343 (1988-03-01), None
patent: 0344898 (1989-12-01), None
patent: 63-278534 (1988-11-01), None
patent: 4-139441 (1992-05-01), None
patent: WO 8809208 (1988-12-01), None
patent: WO 9407582 (1994-04-01), None
Patent Abstracts Of Japan, vol. 013, No. 105 (C-575), Mar. 13, 1989 & JP 63 278534 A (Nordson KK), Nov. 16, 1988.
Patent Abstracts Of Japan, vol. 015, No. 012 (C-0795), Jan. 10, 1991 & JP 02 261525 A (Cosmo Keiso KK), Oct. 24, 1990.
Mitake Kazutoshi
Miyake Fuminori
Toda Megumu
Yasuda Fumio
Yazaki Tatsuo
Genus Corporation
Jordan and Hamburg LLP
Soohoo Tony G.
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