Algal growth or microbial proliferation inhibitors and use...

Details Algal growth or microbial proliferation inhibitors and use... Algal growth or microbial proliferation inhibitors and use...

1999-08-18

2001-10-02

Clardy, S. Mark (Department: 1616)

Plant protecting and regulating compositions

Plant growth regulating compositions

Aquatic plant regulator

Reexamination Certificate

active

06297193

ABSTRACT:

This is a 371 of PCT/JP98/05735, filed Dec. 18, 1998.
1. Technical Field of the Invention
The present invention relates to an inhibitor against the growth of algae or against the proliferation of microorganisms in water-use facilities and use thereof. More specifically, it relates to a inhibitor which inhibits the growth of algae or the proliferation of microorganisms such as water bloom and red tide in water treatment facilities for utilizing river water or rain water as drinking water or daily life water by means of clarification, pipes for water supply or waste water, tanks for breeding or transporting fish and shellfish, a swimming pool, a solar bath tank, water which ponds during excavation, lakes, rivers, dams and the sea, and use thereof.
2. Technical Background
Algae grow by undergoing photosynthesis. In this respect, algae are different from bacteria or fungi. When algae appear, fungi which propagate with algae increase and water is therefore polluted and putrefied in water-use facilities. Further, the growth of algae clogs a pipe or a machine. While shading can inhibit the growth of algae, it is difficult in practical use. There has been so far employed a method of adding an agent such as chlorine or sodium hypochlorite as a method for preventing the growth of algae. However, chlorine reacts with a humin in soil, and forms trihalomethane which is a harmful organic halide.
In a water area which has a small coming and going of water, such as lake, pond or bog, alimentation is likely to increase due to the deposition of organic materials. The increase of alimentation causes a generation of biological plankton such as red tide or water bloom and a generation of a methane gas, whereby the state where the amount of dissolved oxygen is extremely small occurs. When red tide or water bloom occurs, it is waited that the red tide or water bloom naturally disappears or the red tide or water bloom is pumped up together with water by means of a large pump ship and treated in an overland waste-water-treatment plant. However, the above recover of the red tide or water bloom with a pump ship requires a great deal of labor, time and cost, and it lacks efficiency. When waited for the natural disappearance, a great deal of oxygen in water is spent at a decomposing time. This causes the death of culture fishes in volume or the generation of bad smell.
The present inventors have made diligent studies for overcoming the above problems and as a result succeeded in providing an inhibitor to prevent the growth of algae or the proliferation of microorganisms, which inhibitor per se is nonpoisonous or has an extremely low toxicity, which inhibitor is excellent in heat resistance and weather resistance, which inhibitor is inexpensive, and which inhibitor has excellent effects of preventing the growth of algae as compared with chlorine and sodium hypochlorite, and an organic or inorganic material, such as resin, a rubber composition, a hydraulic cement composition and a coating composition, containing the above inhibitor.
Disclosure of the Invention
The present invention provides an algal growth or microbial proliferation inhibitor, which is characterized by containing, as an active component, at least one solid solution selected from the group consisting of the compounds of the following formulae (1) to (4),
the compounds of the following formulae (1) to (4) being a hydroxide solid solution of the formula (1),
[(M
1
2+
)
y
(M
2
2+
)
1−y
]
1−x
M
3+
x
(OH)
2
(A
n−
)
y

·mH
2
O  (1)
wherein y is a number in the range of 0≦y≦1, preferably 0<y≦1, x is a number in the range of 0<x≦0.5, preferably 0.01≦x≦0.5, m is a number in the range of 0≦m≦2, M
1
2+
is Zn
2+
and/or Cu
2+
, M
2
2+
is Mg
2+
and/or Ca
2+
, M
3+
is at least one trivalent metal, and A
n−
is an anion of n valence, an oxide solid solution of the formula (2),
[(M
1
2+
)
y
(M
2
2+
)
1−y
]
1−x
M
3+
x−a
O  (2)
wherein y is a number in the range of 0≦y≦1, preferably 0<y≦1, x is a number in the range of 0<x≦0.5, preferably 0.01≦x≦0.5, x−a means that the number of M
3+
is decreased by a due to a lattice defect, and M
1
2+
and M
2
2+
have the same meanings as those defined in the formula (1), a hydroxide solid solution of the formula (3),
(M
1
2+
)
x
(M
2
2+
)
1−x
(OH)
2
  (3)
wherein x is a number in the range of 0.0001≦x<0.9, and M
1
2+
and M
2
2+
have the same meanings as those defined in the formula (1),
and an oxide solid solution of the formula (4),
(M
1
2+
)
x
(M
2
2+
)
1−x
O  (4)
wherein x is a number of in the range of 0.0001≦x<0.9, and M
1
2+
and M
2
2+
have the same meanings as those defined in the formula (1).
Further, the present invention provides an organic or inorganic material which is characterized in that 100 parts of the organic or inorganic material contains 0.001 to 50 parts by weight, preferably 0.001 to 15 parts by weight, more preferably 0.01to 5 parts by weight, of the above algal growth or microbial proliferation inhibitor.
Most Preferred Embodiment of the Invention
The inhibitor of the present invention is remarkably excellent in effects of preventing the growth of algae, or the like, as compared with chlorine or sodium hypochlorite, and has very low toxicity on living things. Since, further, the inhibitor of the present invention is excellent in heat resistance, the inhibitor of the present invention does not cause bubbles at a molding temperature of a resin or a rubber and there can be easily and effectively produced an organic or inorganic material containing the above inhibitor.
The hydroxide solid solution, i.e., hydrotalcite compound, of the formula (1),
[(M
1
2+
)
y
(M
2
2+
)
1−y
]
1−x
M
3+
x
(OH)
2
(A
n−
)
y

·mH
2
O  (1)
wherein y is a number in the range of 0≦y≦1, x is a number in the range of 0<x≦0.5, m is a number in the range of 0≦m≦2, M
1
2+
is Zn
2+
and/or Cu
2+
, M
2
2+
is Mg
2+
and/or Ca
2
, M
3+
is at least one trivalent metal, and A
n−
is an anion of n valence,
can be easily produced by any one of conventionally known methods. For example, the production process thereof is described in detail in JP-B-46-2280, JP-B-47-32198, JP-B50-30039, JP-B-56-29893, etc.
The oxide solid solution of the formula (2),
[(M
1
2+
)
y
(M
2
2+
)
1−y
]
1−x
M
3+
x−a
O  (2)
wherein y is a number in the range of 0≦y≦1, x is a number in the range of 0<x≦0.5, x−a means that the number of M
3+
is decreased by a due to a lattice defect, and M
1
2+
and M
2
2+
have the same meanings as those defined in the formula (1),
can be produced by calcining the hydrotalcite compound of the formula (1) at about 300° C. to 900° C., preferably about 400° C. to 700° C., for about 0.1 to 10 hours.
The hydroxide solid solution of the formula (3),
(M
1
2+
)
x
(M
2
2+
)
1−x
(OH)
2
  (3)
wherein x is a number of 0.0001≦x<0.9, and M
1
2+
and M
2
2+
have the same meanings as those defined in the formula (1),
can be easily produced according to the method disclosed in JP-A-7-286101. The compound of the formula (3) is a solid solution in which Cu
2+
and/or Zn
2+
is/are dissolved in Ca(OH)
2
or M
g
(OH)
2
and which has the same crystal structure as that of Ca(OH)
2
or M
g
(OH)
2
, and the compound of the formula (3) gives almost the same diffraction pattern as that of Ca(OH)
2
or M
g
(OH)
2
by a powder X-ray diffraction. When “x” is larger than 0.9 in the formula (3), the solid solution of the formula (3) can not be formed and no effects of preventing the growth of algae and no effects of microorganism resistance can be exhibited.
When x is too small, the ejection concentration of

Affiliated with

Also associated with

Rating

Algal growth or microbial proliferation inhibitors and use... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Algal growth or microbial proliferation inhibitors and use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Algal growth or microbial proliferation inhibitors and use... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2579714