US20200331765A1

US20200331765A1 - Amorphous silicon for use in foods, drugs, cosmetics and feed, and production method and production device thereof

Info

Publication number: US20200331765A1
Application number: US16/727,813
Authority: US
Inventors: Senshin UMEKI; Nobukazu TAGUCHI; Noriko KONMA
Original assignee: Gaia Institute Of Environment Technology Inc
Current assignee: Gaia Institute Of Environment Technology Inc
Priority date: 2014-06-03
Filing date: 2019-12-26
Publication date: 2020-10-22
Also published as: WO2015186769A1; US10570019B2; EP3153469A1; JP6667436B2; US20170158515A1; EP3153469A4; JPWO2015186769A1

Abstract

A porous and easy water soluble amorphous silica which does not contain tar, crystal, residual agrichemicals, and carcinogens, and method and apparatus to produce same, by using only one burning treatment from a plant including abundant silica, including a method of manufacturing the amorphous silica wherein rice family plants are burned while stirring and introducing into the furnace an atmospheric gas having a mass of 6.7× or more and 20× or less of the weight of the rice family plants, or oxygen gas having a weight of 1.4× or more and 4× or less with respect to the weight of the rice family plants, and at the same time as burning, combustion gas generated at the time of combustion is discharged.

Description

TECHNICAL FIELD

The present invention relates to amorphous silica not containing tar, crystal and carcinogens which is porous and easily soluble in water and used for foods, medicines, cosmetics and feeds, a manufacturing method thereof and a manufacturing apparatus thereof.

BACKGROUND ART

Silica is a useful material for rice cultivation and the growth of some agricultural crops and has been used as silica fertilizer. In recent years, it has been pointed out that silica is an essential trace mineral not only for agricultural crops but also for the human body, and it has been pointed out that the value as food, medicine and cosmetics is increasing.
Silicon (Si) is 25.8% in Clarke number, and it is the second most frequent substance after oxygen on the earth. Silicon has a lot of its solid as silicon dioxide (SiO2), but most of it is “crystalline”. On the other hand, silica that is absorbed by humans and animals and plants is “amorphous” silica, which is contained in diatomaceous earth, plants and the like. In addition, amorphous silica not containing crystalline silica is generally rare and expensive as crystalline silica has been pointed out as carcinogenic to human body.
Rice hulls and rice straw contain a large amount of amorphous silica. Many methods have been devised to obtain amorphous silica by burning rice husks and rice straw. In the conventional process for producing amorphous silica from rice hulls, in the case of obtaining rum hull combustion products, the rice husks are first fired in a fluidized bed burning furnace and then in an externally heated rotary oven a second firing There was a general way to create combustion products of shells.

Prior Art Document

[Patent Document]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2011-142826
[Patent Document 2] Japanese Unexamined Patent Publication No. 2006-112687
[Patent Document 3] JP-A-7-196312

DISCLOSURE OF THE INVENTION

Problem to Be Solved By the Invention

In Patent Document 1, there is a problem that it is difficult to keep the furnace temperature constant, continuously and inexpensively and stably, and it is impossible to manufacture amorphous silica containing amorphous silica at a ratio nearly 100%. In addition, due to problems of dry distillation gas and tar generated during firing, there is a possibility that tar content may be mixed in the product, and it is difficult to use for foods, medicines, feeds, and the like.
In Patent Document 2, it states that “there is no local overheating generated in the firing course, so it does not include clinker grains (crystals) resulting from firing,” in paragraph 0037, and as a result, paragraph 0038), it is stated that the amorphous silica porous body was obtained up to 40% although it varies depending on the test, and there is a problem that amorphous silica nearly 100% is not obtain. Amorphous silica is about half of amorphous silica.
In the manufacturing method of amorphous silica containing amorphous silica of Patent Document 3, two firing steps of primary firing and secondary firing are required, and there were the problem that the sintering process is complicated. In addition, regarding the use of amorphous silica containing amorphous silica, only the reinforcing material of concrete is disclosed. And foods, medicines, and feeds for which it is essential to contain no carcinogens, and foods, medicines, feeds for which it is essential to use water-soluble amorphous silica are not disclosed.
An object of the present invention is to provide an amorphous silica and a method and apparatus thereof which does not contain tar, crystals, residual agrichemicals and carcinogens, which is porous and readily soluble in water, and which is used for foods, medicine, cosmetics and feeds produced from rice husk, rice straw, rice bran, rice family plants such as wheat, corn, grass and the like, and plant which is rich in silica such as horsetailes, tea and potato etc.(hereinafter collectively referred to as “rice husks etc.”) by only one process of a combustion treatment.

Means for Solving the Problem

The present invention according to one embodiment is,
a method of manufacturing an amorphous silica which is porous and easily soluble in water and which does not contain tar, crystal, residual agrichemicals and carcinogens,
which comprising,
burning the rice husks etc. at the temperature range of between 500° C. or more and 700° C. or less, while stirring the rice husks etc., by introducing at atmospheric gas having a mass of 6.7 times or more and 20 times or less of the weight of the rice husks etc.,
oxygen gas having a weight of 1.4 times or more and 4 times or less with respect to the weight of the rice husks etc., or mixed gas of the atmospheric gas and the oxygen gas into the furnace,
at the same time as burning, combustion gas generated at the time of combustion rice husks etc. is discharged from the furnace.
If the temperature of burning rice husks etc. is less than 500° C., there is a problem that benzopyrene which is a carcinogen is generated, and when the temperature of burning rice husks etc. exceeds 700° C., there is a problem that amorphous silica crystallizes and has carcinogenicity to the human body. In addition, when the atmospheric gas introduced into the furnace is less than 6.7 times the weight of rice husks etc., combustion of the rice husks etc. becomes incomplete, and the atmospheric gas introduced into the furnace exceeds 20 times the weight of the rice husks etc., the temperature in the furnace lowers and it becomes difficult to maintain the temperature. In addition, when the amount of oxygen introduced into the furnace is less than 1.4 times the weight of the rice husks etc., incomplete combustion of the rice husks etc. is caused and the oxygen introduced into the exceeds 4 times weight of the rice husks etc., there is a problem that the combustion of rice husks etc. is performed abruptly and the quality deteriorates as a combustion matter.
The present invention according to another embodiment is,
a method of manufacturing an amorphous silica which is porous and easily soluble in water and which does not contain tar, crystal, residual agrichemicals and carcinogens,
which comprising,
burning the rice husks etc. at the temperature range of between 550° C. or more and 650° C. or less, while stirring the rice husks etc.,
by introducing at atmospheric gas having a mass of 6.7 times or more and 20 times or less of the weight of the rice husks etc., oxygen gas having a weight of 1.4 times or more and 4 times or less with respect to the weight of the rice husks etc., or mixed gas of the atmospheric gas and the oxygen gas into the furnace,
at the same time as burning, combustion gas generated at the time of combustion rice husks etc. is discharged from the furnace.
When the temperature of burning the rice husks etc. is less than 550° C., there is a problem that it takes too much time for combustion. When the temperature of burning exceeds 650° C., amorphous silica in the rice husks etc. begins to be structured, and there is a problem that water solubility becomes difficult. In addition, atmospheric gas to be introduced into the furnace is less than 6.7 times the weight of rice husks etc., burning of the rice husks etc. becomes introduced incomplete, and the atmospheric gas to be introduced into the furnace exceeds 20 times the weight of rice husks etc., there is a problem that the furnace temperature decreases and it becomes difficult to maintain the temperature.
In addition, the oxygen introduced into the furnace exceeds 1.4 times the weight of rice husks etc., burning of the rice husks etc. becomes incomplete, and the oxygen introduced into the furnace exceeds 4 times the weight of rice husks etc. there is a problem that the combustion of rice husks etc. is performed abruptly and the quality deteriorates as a combustion matter.
The invention according to yet another embodiment is a combustion apparatus for obtaining combustion products by burning a rice husks etc. provided with a rotary kiln with a outside heater or rotary furnace with a screw,
the rotating shaft portion of the screw having a hollow portion and the atmosphere air being introduced into the hollow portion, and
having an exhaust mechanism for discharging the dry distillation gas generated during combustion of the rice husks etc. to the outside of the furnace.
The invention according to yet another embodiment is amorphous silica manufactured by the manufacturing method of the invention, wherein the amorphous silica is free of tar, crystal and carcinogens, is porous and water-soluble.
The invention according to yet another embodiment is a food containing amorphous silica produced by the method for producing amorphous silica according to the invention.
The invention according to yet another embodiment is a pharmaceutical product containing amorphous silica produced by the method for producing amorphous silica according to the invention.
The invention according to yet another embodiment is a cosmetic product containing amorphous silica produced by the method for producing amorphous silica according to the invention.
The invention according to yet another embodiment is a feed containing amorphous silica produced by the method for producing amorphous silica according to the invention.

Effect of the Invention

According to the process for producing amorphous silica according to the invention, the temperature range (500° C. to 700° C.) is set, and it is a possible to produce amorphous silica free from tar, crystal, residual agrichemicals and carcinogens, porous, and easy to be solved in water.
According to the method for producing amorphous silica according to the invention, an amorphous silica which is easily water-soluble, free of tar, crystal and carcinogens can be produced by setting an optimum temperature range (550° C. to 650° C.).
According to the method for producing amorphous silica according to the invention, amorphous silica can be produced stably by discharging the dry distillation gas containing tar generated from the raw material at the time of combustion to the outside of the furnace appropriately while setting above preferable temperature range.
The amorphous silica according to the invention is amorphous silica which is porous and easily soluble in water and does not contain tar, crystal, and carcinogens, and can be used for foods and the like.
According to the food according to the invention, it is possible to provide a food having effects such as reinforcement of human bones, skin beautification, reinforcement of nutritional components of blood vessels, enhancement of antioxidant power, and the like.
According to the medicine according to the invention, it is possible to provide a medicine having the effect of strengthening human bones, beautifying skin, reinforcing nutritional components of blood vessels, strengthening antioxidant power and the like.
The cosmetic product according to the invention can provide a cosmetic product having effects such as skin beautification, reinforcement of nutritional components of blood vessels and the like.
According to the feed according to the invention, it is possible to provide a feed effective for prevention of health and illness of livestock and cancer-producing animals and promotion of growth of chickens.
According to the present invention, porous and easy water soluble amorphous silica, method and apparatus to produce thereof can be obtained which does not contain tar, crystal, residual agrichemicals, and carcinogens by using only one burning treatment from a plant including silica abundantly such as rice plant like as rice husks constituting rice, rice straw, rice bran, wheat, corn, grass and horsetailes, tea, potato and the like.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of an X-ray analytical spectrum of a combustion product of rice husks.

FIG. 2 is soluble test results of the combustion product of the rice husks in purified water at 40° C.

FIG. 3 is a view of a combustion apparatus according to this embodiment.

FIG. 4 is a view showing another example of the combustion device of the present embodiment.

EXPLANATION OF NUMBERS

1 indirect heating device
2 kilns
2 a drying section
2 b combustion part
2 c internal space
2 in entrance
2 out exit
3 combustion chamber
3 a exhaust pipe
4 heating source
5 piping section
6 cooling section
7 deodorizing part
8 dry distillation gas recovery section
9 auxiliary heating source
10 steam smoke route
11 lubricating section
12 water distribution pipe
13 fans
14 hopper
15 material supply piping
16 supply screw
17 second discharge pipe
18 cooling device
19 connection pipe (downstream exhaust pipe)
20 transport screw
21 transport screw
22 steam vent pipe (upstream exhaust gas pipe)
23 chimney section
24 circulating pipe
25 degassing pipe
26 atmosphere-oxygen supply pipe
30 connection
60 recovery section
31 helical blade
41 stirring blade
51 screw shaft
61 air supply opening
71 atmospheric supply pipe
81 oxygen supply tube
91 smoke eliminating device
P input material
Q material containing amorphous silica
100, 101 charcoal of rice husks
200 capsules
300 capsule containers
400 capsules
500 capsule type food
501 pellet type food
600 binder

DETAILED DESCRIPTION OF THE INVENTION

The mode for carrying out the present invention is,
a method of manufacturing an amorphous silica which is porous and easily soluble in water and which does not contain tar, crystal, residual agrichemicals and carcinogens,
which comprising,
burning the rice husks etc. at the temperature range of between 500° C. or more and 700° C. or less, while stirring the rice husks etc.,
by introducing at atmospheric gas having a mass of 6.7 times or more and 20 times or less of the weight of the rice husks etc., oxygen gas having a weight of 1.4 times or more and 4 times or less with respect to the weight of the rice husks etc., or mixed gas of the atmospheric gas and the oxygen gas into the furnace,
at the same time as burning, combustion gas generated at the time of combustion rice husks etc. is discharged from the furnace.
The mode for carrying out the present invention is,
a method of manufacturing an amorphous silica which is porous and easily soluble in water and which does not contain tar, crystal, residual agrichemicals and carcinogens,
which comprising,
burning the rice husks etc. at the temperature range of between 550° C. or more and 650° C. or less, while stirring the rice husks etc.,
by introducing at atmospheric gas having a mass of 6.7 times or more and 20 times or less of the weight of the rice husks etc., oxygen gas having a weight of 1.4 times or more and 4 times or less with respect to the weight of the rice husks etc., or mixed gas of the atmospheric gas and the oxygen gas into the furnace,
at the same time as burning, combustion gas generated at the time of combustion rice husks etc. is discharged from the furnace.
Here, amorphous silica which is a combustion product such as rice husks or the like is readily soluble in water even at a temperature within the range of 40° C. or less in the living body temperature.
A combustion device according to an embodiment of the present invention is a combustion device that burns rice husks or the like to obtain a combustion product such as rice husks, wherein the combustion device is configured to rotate a rotary kiln or a screw Wherein a rotating shaft portion of the screw has a hollow portion, atmosphere or oxygen or a mixture thereof is introduced into the hollow portion, and exhaust gas generated upon combustion of the rice husks or the like is supplied to a furnace And has an exhaust mechanism for discharging the exhaust gas to the outside.

EXAMPLE

Example 1

FIG. 1 is a diagram of an X-ray analytical spectrum of a combustion product of rice husks.
An X-ray analytical spectrum diagram in the case of combustion temperature 450° C., combustion temperature 550° C., combustion temperature 650° C., combustion temperature 700° C. are shown in order from upward in FIG. In either case, it is found that the shape of the X-ray analysis spectrum is a broad shape without a peak showing crystallinity, and the rice husks combustion product is amorphous.

Example 2

FIG. 2 shows the dissolution test results of the combustion product of the rice husks in purified water at 40° C.
From the test results shown in FIG. 2, it can be seen that the lower the production temperature, the better the water solubility. Also, in the case of “silica gel” which is one type of amorphous silica, it is found that it is hardly dissolved. Considering the results of the X-ray analysis shown in FIGS. 1 and 2, even if it is amorphous silica, not all of them are easily water-solubilized but their properties are greatly different depending on the production temperature and the manufacturing method. Although the manufacturing temperature is low, rice husk burned materials have high water solubility, but the production time is long and economic efficiency is not excellent. Also, if it is below 500° C., it is likely to produce benzotriazole which is a carcinogenic substance, so it is not suitable for edible use. When the production temperature is high, the production becomes easy, but the water solubility becomes low. It is generally considered that the combustion product of the rice husks exceeding 800° C. will crystallize, and crystalline silica is also considered to be carcinogenic, so it is also not suitable for edible use.
Therefore, amorphous silica which does not contain carcinogens and has high water solubility means that the temperature is as low as possible at a production temperature of 500° C. or higher. Considering the production efficiency for this, the optimum production temperature for practical use is in the range of 550 to 650° C.

Example 3

Various analyzes were carried out on amorphous silica obtained from rice husk burned material at a combustion temperature of 600° C. A series of results will be described. The inspection agency is Japan Food Function Analysis Research Institute Co., Ltd.
Table 1 shows the test results on the bacteria of the amorphous silica-containing rice husk burned material of the present invention.
From Table 1, it is found that the number of general viable bacteria is 300 or less/g, and the coliform bacteria group is negative.

TABLE 1

Test Results about Bacteria of Rice Hull
Burned Material containing Amorphous Silicon

		Detection
Test Items	Test Result	Limit	Test Method

number of general	300 or less /g	—	standard agar
viable bacteria			plate culture
			method
coliform bacteria	negative	—	BGLB medium
group			culture method
(qualitative analysis)

Table 2 is an analysis on the content of amorphous silica of the present invention. 41000 mg of silica was confirmed in the rice husk burned material in 100 g.

TABLE 2

Content of Amorphous Silicon

Test Item	Test Result	Detection Limit	Test Method

silicon	41000 mg/100 g	—	absorption photometry

Table 3 shows the test results concerning the presence or absence of the amorphous silica radioactive substance of the present invention.
From Table 3, radioactive iodine and radioactive cesium are not detected.

TABLE 3

Presence/Absence of Amorphous Silicone Radioactive Substance

Test Items	Test Result	Detection Limit

radioactive iodine (iodine-131)	not detected	3.6 Bq/kg
radioactive cesium	not detected	—
sesium-134	not detected	5.0 Bq/kg
sesium-137	not detected	4.0 Bq/kg

Table 4 shows the test results of the presence or absence of harmful metals and the presence or absence of carcinogens of the amorphous silica-containing burned rice flour.
From Table 4, it was found that the carcinogenic substance, benzpyrene, was not detected.

TABLE 4

Presence/Absence of Harmful Metals and Carcinogenic Substances of
Rice Hull Burned Materal including Amorphous Silicone

Test Items	Test Result	Detection Limit	Test Method

cadmium	0.02 ppm	—	ICP emission spectroscopy
lead	0.2 ppm	—	ICP emission spectroscopy
arsenicum	not detected	0.1 ppm	ICP emission spectroscopy
mercury	not detected	0.01 ppm	gold amalgam method
benzpyrene	not detected	0.01 ppm	gas chromatograph
			mass spectroscopy

Table 5 shows the test results of the detection of residual agrichemicals of amorphous silica-containing rice husk burned materials of the present invention.
Residual pesticides (276 items) were all undetected.
Tables 6, 7, 8, and 9 show a list of concrete residual agrichemical items.

TABLE 5

Detection of Residual Agrichermcals in Rice Hull
Burned Material Including Amorphous Sllicon

Test Items	Test Result	Detection Limit	Test Method

residual	all undetected	0.1 ppm	sirnultenaous
agrichemicals			analysis with 276 items

TABLE 6

List of Residual Agrichemicals (1)

	Result of	Detection	Analytical
Analysis items	Analysis	Limit	Method

BHC (summation	not detected	0.1	*1
of α β γ and δ)
BHC (α)	not detected	0.1	*1
BHC (β)	not detected	0.1	*1
BHC (γ)	not detected	0.1	*1
BHC (δ)	not detected	0.1	*1
EPN	not detected	0.1	*1
IBP	not detected	0.1	*1
op′-OOD	not detected	0.1	*1
op′-OOE	not detected	0.1	*1
op′-OOT	not detected	0.1	*2
pp′-OOD	not detected	0.1	*1
pp′-OOE	not detected	0.1	*1
pp′-OOT	not detected	0.1	*1
XMO	not detected	0.1	*1
acrinathrin	not detected	0.1	*1
azaconazole	not detected	0.1	*1
azinphos-methyl	not detected	0.1	*1
acetamiprid	not detected	0.1	*2
acetochlor	not detected	0.1	*1
azoxystrobin	not detected	0.1	*2
atrazine	not detected	0.1	*1
anilofos	not detected	0.1	*1
amitraz	not detected	0.1	*1
ametrine	not detected	0.1	*1
alachlor	not detected	0.1	*1
aldrin	not detected	0.1	*1
allethrin	not detected	0.1	*1
isouron	not detected	0.1	*2
isoxathion	not detected	0.1	*2
isofenphos	not detected	0.1	*1
isofenphosoxon	not detected	0.1	*1
isoprocarb	not detected	0.1	*1
isoprothiolane	not detected	0.1	*1
iprobenfos	not detected	0.1	*1
imazosulfuron	not detected	0.1	*2
imidacloprid	not detected	0.1	*2
indoxacarb	not detected	0.1	*2
uniconazole P	not detected	0.1	*1
esprocarb	not detected	0.1	*1
ethalfluralin	not detected	0.1	*1
ethion	not detected	0.1	*1
ethylchiometon	not detected	0.1	*1
edifenphos	not detected	0.1	*1
etoxazole	not detected	0.1	*1
etofenprox	not detected	0.1	*1
ethoprophos	not detected	0.1	*1
α-endosulfan	not detected	0.1	*1
β-endosulfan	not detected	0.1	*1
endrin	not detected	0.1	*1
oxadiazon	not detected	0.1	*1
oxadiyl	not detected	0.1	*1
oxaziclomefone	not detected	0.1	*1
oxyfluorfen	not detected	0.1	*1
orysastrobin	not detected	0.1	*1
cadusafos	not detected	0.1	*1
cafenstrole	not detected	0.1	*2
calbaryl (NAC)	not detected	0.1	*1
karbutilate	not detected	0.1	*2
carbendazole (MBC)	not detected	0.1	*2
carbofuran	not detected	0.1	*1
quinalphos	not detected	0.1	*1
quinoxyfen	not detected	0.1	*1
quinoclamine	not detected	0.1	*1
captan	not detected	0.1	*1
quintozene	not detected	0.1	*1
kresoxim-methyl	not detected	0.1	*1
clothianidin	not detected	0.1	*2
chromafenozide	not detected	0.1	*2
chlorthal-dimethyl	not detected	0.1	*1
chlorothalonil (TPN)	not detected	0.1	*1
chlordane (cis)	not detected	0.1	*1
chlordane (trans)	not detected	0.1	*1
chlorpyrifos	not detected	0.1	*1
chlorpyrifos-methyl	not detected	0.1	*1
chlorfenapyr	not detected	0.1	*1

Analytical Method: 1 Gas Chromatograph Mass Spectrometry, 2 Liquid Chromatograph Mass Spectrometry

TABLE 7

List of Residual Agrichemicals (2)

	Result of	Detection	Analytical
Analysis items	Analysis	Limit	Method

chlorfenvinphos (E)	not detected	0.1	*1
chlorfenvinphos (Z)	not detected	0.1	*1
chlorpropham	not detected	0.1	*1
chlorobenzilate	not detected	0.1	*1
cyanazine	not detected	0.1	*1
cyanophos	not detected	0.1	*1
diuron (DCMU)	not detected	0.1	*2
diethofencarb	not detected	0.1	*1
diclocymet-1	not detected	0.1	*1
diclocymet-2	not detected	0.1	*1
dichlofenthion	not detected	0.1	*1
dichlobenil (DBN)	not detected	0.1	*1
diclofop-methyl	not detected	0.1	*1
dicloran	not detected	0.1	*1
dichlorvos (DDVP)	not detected	0.1	*2
cyhalothrin	not detected	0.1	*1
cyhalohopbutyl	not detected	0.1	*1
diphenamid	not detected	0.1	*1
difenoconazole	not detected	0.1	*1
cyfluthrin-1	not detected	0.1	*1
cyfluthrin-2	not detected	0.1	*1
cyfluthrin-3	not detected	0.1	*1
diflufenican	not detected	0.1	*1
cyproconazole	not detected	0.1	*1
cyprodinil	not detected	0.1	*1
cypermethrin-1	not detected	0.1	*1
cypermethrin-2	not detected	0.1	*1
cypermethrin-3	not detected	0.1	*1
cypermethrin-4	not detected	0.1	*1
simazine	not detected	0.1	*1
dimethametryn	not detected	0.1	*1
dimethylvinphos (Z)	not detected	0.1	*1
dimethenanid	not detected	0.1	*1
dimethoate	not detected	0.1	*1
simetryn	not detected	0.1	*1
dimepiperate	not detected	0.1	*1
silafluofen	not detected	0.1	*1
spinosyn A	not detected	0.1	*2
spinosyn D	not detected	0.1	*2
spiroxamine-1	not detected	0.1	*1
spiroxamine-2	not detected	0.1	*1
zoxamide	not detected	0.1	*1
terbacil	not detected	0.1	*1
diazinon	not detected	0.1	*1
daimuron	not detected	0.1	*2
thiacloprid	not detected	0.1	*2
thiamethoxam	not detected	0.1	*2
thiophanate-methyl	not detected	0.1	*2
thiobencarb	not detected	0.1	*1
thifensulfuron-methyl	not detected	0.1	*2
thifluzamide	not detected	0.1	*1
dieldrin	not detected	0.1	*1
tecnazene	not detected	0.1	*1
tetrachlorvinphos	not detected	0.1	*1
tetraconazole	not detected	0.1	*1
tetradiphon	not detected	0.1	*1
thenylchlor	not detected	0.1	*1
tebuconazole	not detected	0.1	*1
tebufenozide	not detected	0.1	*2
tebufenpyrad	not detected	0.1	*1
tefluthrin	not detected	0.1	*1
deltamethrin	not detected	0.1	*1
terbutryn	not detected	0.1	*1
terbufos	not detected	0.1	*1
tralomethrin	not detected	0.1	*1
triadimenol	not detected	0.1	*1
triadimefon	not detected	0.1	*1
triazophos	not detected	0.1	*1
tri-allate	not detected	0.1	*1
tricyclazole	not detected	0.1	*2
tribuphos	not detected	0.1	*1
triflumizole	not detected	0.1	*2
triflumizole metabolite	not detected	0.1	*2
trifluralin	not detected	0.1	*1
trifloxystrobin	not detected	0.1	*1

Analytical Method: 1 Gas Chromatograph Mass Spectrometry, 2 Liquid Chromatograph Mass Spectrometry

TABLE 8

List of Residual Agrichemicals (3)

	Result of	Detection	Analytical
Analysis items	Analysis	Limit	Method

tolclofos-methyl	not detected	0.1	*1
tolfenpyrad	not detected	0.1	*1
napropamide	not detected	0.1	*1
nitrothal-isopropyl	not detected	0.1	*1
norflurazon	not detected	0.1	*1
paclobutrazol	not detected	0.1	*1
parathion	not detected	0.1	*1
parathion-methyl	not detected	0.1	*1
(methyl-parathion)
halfenprox	not detected	0.1	*1
bitertanol	not detected	0.1	*1
bifenox-1	not detected	0.1	*1
bifenox-2	not detected	0.1	*1
bifenthrin	not detected	0.1	*1
piperophos	not detected	0.1	*1
pyraclofos	not detected	0.1	*1
pyrazosulfuron-ethyl	not detected	0.1	*2
pyrazophos	not detected	0.1	*1
pyrazolate	not detected	0.1	*2
pyraflufen-ethyl	not detected	0.1	*1
pyridafenthion	not detected	0.1	*1
pyridaben	not detected	0.1	*1
pyrifenox (E)	not detected	0.1	*1
pyrifenox (Z)	not detected	0.1	*1
pyriftalid	not detected	0.1	*2
pyributicarb	not detected	0.1	*1
pyriproxyfen	not detected	0.1	*1
pyriminobac-methyl (E)	not detected	0.1	*1
pyriminobac-methyl (Z)	not detected	0.1	*1
pirimiphos-methyl	not detected	0.1	*1
pyrimethanil	not detected	0.1	*1
pyrethin-1	not detected	0.1	0
pyrethin-2	not detected	0.1	*1
pyroquilon	not detected	0.1	*2
vinclozolin	not detected	0.1	*1
fipronil	not detected	0.1	*1
fenamiphos	not detected	0.1	*1
fenarimol	not detected	0.1	*1
fenitrothion	not detected	0.1	*1
fenoxanil	not detected	0.1	*1
fenothiocarb	not detected	0.1	*1
phenothrin-1	not detected	0.1	*1
phenothrin-2	not detected	0.1	*1
fenobucarb	not detected	0.1	*1
ferimzone (Z)	not detected	0.1	*1
fensulfothion	not detected	0.1	*1
fenthion	not detected	0.1	*1
phenthoate	not detected	0.1	*1
fentrazamide	not detected	0.1	*2
fenvalerate-1	not detected	0.1	*1
fenvalerate-2	not detected	0.1	*1
fenpyroximate	not detected	0.1	*2
fenbuconazole	not detected	0.1	*1
fenpropathrin	not detected	0.1	*1
fenpropimorph	not detected	0.1	*1
fthalide	not detected	0.1	*1
butachlor	not detected	0.1	*1
butamifos	not detected	0.1	*1
bupirimate	not detected	0.1	*1
buprofezin	not detected	0.1	*1
flazasulfuron	not detected	0.1	*2
flamprop-methyl	not detected	0.1	*1
fluacrypyrim	not detected	0.1	*1
fluquinconazole	not detected	0.1	*1
flucythrinate-1	not detected	0.1	*1
flucythrinate-2	not detected	0.1	*1
flutolanil	not detected	0.1	*1
fluvalinate	not detected	0.1	*2
flufenoxuron	not detected	0.1	*2
flubendiamide	not detected	0.1	*2
flumioxazin	not detected	0.1	*1
flumiclorac-pentyl	not detected	0.1	*1
fluridone	not detected	0.1	*1
pretliachlor	not detected	0.1	*1
prodiamine	not detected	0.1	*1
procymidone	not detected	0.1	*1

Analytical Method: 1 Gas Chromatograph Mass Spectrometry, 2 Liquid Chromatograph Mass Spectrometry

TABLE 9

List of Residual Agrichemicals (4)

	Result of	Detection	Analytical
Analysis items	Analysis	Limit	Method

prothiofos	not detected	0.1	*1
propachlor	not detected	0.1	*1
propazine	not detected	0.1	*1
propanil	not detected	0.1	*1
propargite	not detected	0.1	*1
propiconazole-1	not detected	0.1	*1
propicanazole-2	not detected	0.1	*1
propyzamide	not detected	0.1	*1
prohydrojasmon-1	not detected	0.1	*1
prohydrojasmon-2	not detected	0.1	*1
profenofos	not detected	0.1	*1
propoxur	not detected	0.1	*1
bromacil	not detected	0.1	*1
prometryn	not detected	0.1	*1
bromobutide	not detected	0.1	*1
bromopropylate	not detected	0.1	*1
bromophos	not detected	0.1	*1
hexaconazole	not detected	0.1	*1
hexazinone	not detected	0.1	*1
benalxyl	not detected	0.1	*1
benoxacor	not detected	0.1	*1
permethrin (isomer 1)	not detected	0.1	*1
permethrin (isomer 2)	not detected	0.1	*1
penconazole	not detected	0.1	*1
pencycuron	not detected	0.1	*1
bensulfuran-methyl	not detected	0.1	*2
benzobicyclon	not detected	0.1	*2
pendimethalin	not detected	0.1	*1
benfuracarb	not detected	0.1	*1
benfluralin	not detected	0.1	*1
benfuresate	not detected	0.1	*1
phosalone	not detected	0.1	*1
boscalid	not detected	0.1	*1
fosthiazate	not detected	0.1	*1
phosphamidon	not detected	0.1	*1
phosmet	not detected	0.1	*1
malachion	not detected	0.1	*1
myclobutanil	not detected	0.1	*1
methidathion	not detected	0.1	*1
methoxychlor	not detected	0.1	*1
metominostrobin	not detected	0.1	*2
metolachlor	not detected	0.1	*1
metribuzin	not detected	0.1	*2
mepanipyrim	not detected	0.1	*1
mevinphos	not detected	0.1	*1
mefenacet	not detected	0.1	*1
mefenoxam	not detected	0.1	*1
mefenpyr-diethyl	not detected	0.1	*1
mepronil	not detected	0.1	*1
monocrotophos	not detected	0.1	*1
linuron	not detected	0.1	*2
lenacil	not detected	0.1	*1

Analytical Method: 1 Gas Chromatograph Mass Spectrometry, 2 Liquid Chromatograph Mass Spectrometry

Using the amorphous silica-containing rice husk burned material of the present invention as a specimen, in accordance with the OECD Guideline for the Testing of Chemicals 404 (2002), a skin primary irritation test using a rabbit was performed.
The specimens were closed to the intact and scarred skin of 3 rabbits for 24 hours. As a result, 1 hour after removal, very mild to clear erythema was seen in all cases, and in 2 cases very mild edema was seen but disappeared by 72 hours.
ISO 10993-10 Biological
Evaluation of Medical
The primary irritation index (PII) obtained according to Devices—Part 10 (2010) was 0.4.
From the above, in the primary skin irritation test using rabbits, specimens were evaluated as falling within the category of “nonirritating”.
Acute oral toxicity test (limit test) using rats was conducted using the amorphous silica-containing burned rice flour sample as a specimen of the present invention. Samples at a dose of 2,000 mg/kg were orally administered to the test group to male and female rats as water control for solvent control as control group and observed for 14 days. As a result, no abnormalities and deaths were observed during the observation period. From the above, it was evaluated that in a single oral administration using rats, the LD50 value of the specimen exceeded 2,000 mg/kg in both males and females.

Example 4

Application to Food and Medicine
The amorphous silica of the present invention is effective for improving the bone density of the human body. Subjects From the age of 40 to the age of 80, the bone density tended to rise as a result of giving the amorphous silica of the present invention every day. Application as a supplement to improve bone density is also possible.
Table 10 shows that bone density before and after ingestion is measured by ingesting about 100 mg of amorphous silica containing powder of the present invention (silica content 40% or more) in 10 males and females age 45 to 82 years a day It is the result.
Here, Table 10 shows the ultrasonic bone density measurement result of the bone of the subject's heel.

TABLE 10

Measurement Results about
Influence on Bone Density of Amorphous Silicon

	Before	After	Ingestion	Increase or
	Ingestion	Ingestion	Period	Decrease
Age, Sex	(m/s)	(m/s)	(day)	(± m/s)

51 years old, Man	1467.9	1473.6	193	+5.7
58 years old. Man	1443.6	1472.4	187	+28.8
45 years old. Woman	1514.7	1547.5	191	+32.8
53 years old, Woman	1482.1	1483.7	200	+1.6
61 years old, Woman (1)	1458.4	1481.3	187	+22.9
61 years old, Woman (2)	1456 9	1478.4	182	+21.5
62 years old, Woman	1509.7	1524.6	201	+14.9
72 years old, Woman	1451.2	1477.5	194	+26.3
75 years old, Woman	1443.6	1469.7	182	+26.1
82 years old, Woman	1467.3	1484.9	198	+17.6

According to Table 10, it is understood that the bone densities of all subjects, men and women aged 45 to 82 years, increased before and after ingestion by all subjects.
Furthermore, silica is absorbed from the intestinal wall and has the effect of solubilizing adherents inside the defect as it passes through the blood vessel, which is effective also in preventing arteriosclerosis.

Example 5

Application to Cosmetics
Silica is also contained in the human body and exists in hair, nails, blood vessels, bones, joints and cell walls In vivo silica has a function of bundling collagen, it helps regeneration, reinforcement and maintenance of bones, hair, nails, and collagen, as well as skin moisture retention and the like.

Example 6

Application to Feed
This example is an example in which amorphous silica of the present invention is mixed with feed. It is a method of mixing amorphous silica directly into livestock feed. This will promote the health of livestock and cancer-giving animals, and will also improve meat quality.

Example 7

FIG. 3 is a diagram of the combustion apparatus of this embodiment.
The combustion apparatus used in the present invention has,
a rotating kiln 2 having helical blade and stirring blades disposed therein, an air/oxygen supply pipe 26 for supplying atmospheric air or oxygen or a mixed gas of said atmosphere and said oxygen,
a combustion chamber 3 for supplying heat to the entire interior of one kiln 2 by burning rice husks etc. while indirectly heating the rice husks or the like thrown into the one kiln 2,
a heating source 4 such as a burner facing the inside of the combustion chamber 3,
a drying section 2a which is set in the inside of the kiln 2 so as to evaporate moisture contained in the rice husks etc. thrown into the kiln 2 by indirect heating of the combustion chamber 3, and
a combustion section 2b which is set in the inside of the kiln 2 so as to burn rice husks etc. dried in the drying section 2a.

Example 8

FIG. 4 is a diagram of another example of the combustion device of this embodiment.
The combustion apparatus used in the present invention has
a pipe 71 for supplying atmospheric air,
a pipe 81 for supplying oxygen,
an indirect heating device 1 such as an electric furnace capable of setting an arbitrary temperature,
Kiln 2,
an opening portion 61 of a rotating screw shaft for supplying the atmospheric air, the oxygen or a mixed gas thereof into the kiln,
a helical blade 31, and
stirring blades 41.

INDUSTRIAL APPLICABILITY

According to the present invention, the combustion treatment is one step, rich in rice plant, rice straw, rice bran, rice family plants such as wheat, corn, grass, and the like, and horsetail, tea, potato, etc. Amorphous silicon that is used for foods, medicines, cosmetics, and feeds that do not contain tar, crystal, residual agrichemicals and carcinogens from vegetable silicon and are easily porous and soluble in water, and methods and apparatus for producing the same It contributes to the promotion of human health and the development of livestock industry.

Claims

1. An amorphous silica, formed by burning rice family plants in a combustion apparatus that includes a rotating kiln (2),

said amorphous silica being porous, and wherein water-soluble carcinogenenic substances are less than 0.01 ppm, and residual agrichemicals are less than 0.1 ppm.