JPH0268116A - Deodorizing method and deodorant - Google Patents

Abstract

PURPOSE:To perform effective deodorization by connecting a deodorant incorporating phosphoric acid and peroxide, etc., with the exhaust port of a melting equipment of the disposable medical instruments and using it. CONSTITUTION:The offensive gas components of petroleous hydrocarbon generated when the disposable medical instruments such as a syringe are heated and melted in a medical institution are deodorized. As a deodorant, phosphoric acid, phosphorous acid, hydrophosphorous acid and peroxide such as sodium peroxide are incorporated. This deodorant is connected with the exhaust port of a melting equipment having good sealing properties for the disposable medical instruments and used. In such a way, the offensive gas generated when the disposable medical instruments ire melted by heat is deodorized or offensive odor is reduced and treatment of the disposable medical instruments is enabled even in a hospital.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a deodorizing method and a method for deodorizing or reducing the odor of malodorous gases generated during heat treatment after use of disposable medical instruments. This relates to deodorizers.

(Prior Art) In recent years, disposable medical instruments, such as syringes, have been increasingly used in medical institutions. However, it is a well-known fact that accidents related to handling are increasing. This is an accident that will lead to further infection.

Of course, there are many measures being taken by those involved to prevent such accidents, and one method is not to dispose of used instruments within the hospital, but to outsource the disposal. be. However, even in this case, used instruments must be stored for a certain period of time and then transported outside once the quantity has been collected, so accidents during storage and transportation are still a problem.

As mentioned above, the reason for such accidents is that used medical instruments must be stored and transported, which poses a potential risk of accidents.

In order to reduce this potential danger, methods are being considered to immediately dispose of used cypress and medical instruments within hospitals. These used medical devices are heated and melted at high temperatures to sterilize them, and at the same time, the melted plastic, which is the structure of the disposable medical devices, is solidified in a certain container, creating a lump of plastic that can cause accidents. This is a method in which the patient is left in an unprofitable form, and the patient is disposed of on the same day as the medical treatment ends. However, the problem with this method is that when the plastic is melted, it emits a strong odor (and when used in a limited space such as a hospital, it contaminates the surrounding environment, especially in terms of odor).

(Problem to be solved by the invention) Therefore, methods such as inserting ozone into the melting device and deodorizing it by oxidative decomposition, and passing the exhaust gas from the melting device through a metal catalyst (for example, a platinum catalyst) and deodorizing it by catalytic combustion have been considered. However, in terms of deodorizing performance or usage conditions, a satisfactory deodorizing effect has not been obtained.For example, when deodorizing with ozone, the melting temperature of medical instruments exceeds 200'C, so ozone itself is It decomposes rapidly and cannot fulfill the purpose of deodorization, and deodorization by catalytic combustion is used at an effective combustion temperature of 250°C or higher, usually 300°C or higher, while the exhaust gas from the dissolving device is 120-180°C.
°C, and effective deodorization cannot be expected at this temperature, and the price of the metal catalyst itself is not cheap. Therefore, dissolving devices for disposable medical devices are not used even though medical institutions desire to commercialize them. It has not yet been put into practical use due to some problems.

The object of the present invention is to make the malodorous gas generated during the thermal dissolution process of the disposable medical instruments described above odorless or to reduce the odor, and to enable the thermal dissolution process of disposable medical instruments even in hospitals.

(Means for Solving the Problems) The present inventors have investigated the chemical components of the gas generated when heating and melting such disposable medical devices, and also the main cause of the malodor among the gas components. After examining the causative substances, we found that the main component of the emitted gas is petroleum hydrocarbons, which are caused by the structure (plastic) of disposable medical devices, and that the malodorous components include acetaldehyde, acetone, acetic acid, etc. It turned out to be gas. Furthermore, it has been found that even if used medical instruments contain animal or human body fluids similar to blood, there is no significant difference in the components of the gas generated.

Therefore, we focused on these malodorous components, especially acetaldehyde, which is regulated as a malodorous gas under the Offensive Odor Prevention Act, and investigated effective deodorizing agents and deodorizing methods for these gases. A deodorizer containing at least one selected from the group consisting of acids, hypophosphorous acid, and peroxides is used with good airtightness (the exhaust point is limited to almost one place, and there is almost no leakage from other parts). We discovered that effective deodorization can be achieved by connecting it to the exhaust port of a disposable medical device dissolving device (such as a disposable medical device).
The present invention has now been completed.

The present invention will be explained in detail below.

The present invention is directed to the use of a deodorizer containing at least one selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous acid, and peroxide. This invention relates to a method for deodorizing foul-smelling gas. Furthermore, the present invention relates to the above-mentioned deodorizing agent for deodorizing malodorous gases generated during heat treatment of disposable medical instruments.

The peroxide used in the present invention can be broadly selected from inorganic peroxides and organic peroxides, but preferred ones include sodium peroxide, potassium peroxide, calcium peroxide, barium peroxide, and percarbonate. Examples include sodium, sodium perborate, perchloric acid and its salts. The deodorizing agent used in the present invention further includes iron, cobalt, nickel, chromium, titanium, zirconium, vanadium, molybdenum, tungsten, manganese, copper, silver, zinc, germanium, tin, lead, platinum, palladium, magnesium, Deodorizing ability is increased by mixing one or more types of metals or compounds such as calcium, strontium, barium, etc. The compounds include oxides, carbonates, sulfates,
Examples include chloride.

When these metals or their compounds are used, their proportion in the deodorizer is arbitrary, but preferably 0.1 to 9.
0 weight percent, more preferably 0.1 to 60 weight percent.

The deodorizing agent used in the present invention can be supported on or mixed with a commonly used porous carrier. Preferred carriers include silica, alumina, silica alumina, natural zeolite, synthetic zeolite, diatomaceous earth, activated carbon, Kanuma soil, clay minerals, etc., but are not particularly limited to these, and commonly used carriers may be used. Either of these can be used. When using a carrier, the proportion of the carrier in the deodorizer is arbitrary, but preferably 10 to 10.
90% by weight, more preferably 30-70% by weight.

The deodorizing agent of the present invention can be used as a deodorizing agent in either liquid or solid form, but in the case of liquid deodorizing agents such as phosphoric acid, phosphorous acid, and hypophosphorous acid, it is supported on a porous carrier,
There is no problem in using it as a solid deodorizing agent.In fact, due to usage constraints, it is often supported on a porous carrier and used as a solid deodorizing agent, but its form is limited to these. It is not subject to any restrictions in either liquid or solid form.
When used as a solid deodorizer, depending on the size of the solid particles, from powder to granules with a particle size of about 1 m+i, 21a
It can take a wide range of forms from 11 to about 20 neu pellets, but when forming the powder into a pellet shape, a binder is often used to make it easier to form. There is no exception for drugs.
It is possible to mold using commonly used binders. Preferred binders include bentonite, colloidal silica, china clay, kaolin, inorganic materials such as water glass, sodium alginate, glue, glucose, dextrin, hydroxypropylcellulose (HPC),
Carboxymethylcellulose sodium salt (CMC)
, polyvinyl alcohol (PVA), polyvinylpyrrolidinone (PVP), and other organic polymer binders, but the binder is not limited thereto, and any commonly used binder can be used.

The raw materials used in the deodorizing agent of the present invention are not particularly limited; any commonly available raw materials can be used, and any raw materials can be used as long as they can be finally formed into a desired form through preparation and molding methods.

The disposable medical devices targeted by the deodorizing method and deodorizing agent of the present invention mainly include plastics that can be melted by heating below 300°C (e.g., vinyl chloride, polypropylene, polystyrene, polyethylene, polyester, polycarbonate, polyurethane, etc.). Disposable medical devices that are made into structures, such as disposable syringes, blood collection bags, blood transfusion bags, blood collection tubes, and other disposable vinyl gloves, etc., but are not particularly limited to these, and require heat treatment. In addition, if a malodor is generated during heat treatment, the deodorization method of the present invention can effectively deodorize or reduce the malodor. In addition, heat treatment of medical instruments for use is usually 18
It is carried out at 0-300°C.

The deodorizer of the present invention is a deodorizer container that has two openings, and when the deodorizer is filled between both openings, and gas containing a bad odor flows in from one side, the inflowing gas is always absorbed into the deodorizer. After passing through the layer, the deodorizer and the gas containing the bad odor come into contact with each other efficiently.
Any shape can be used as long as the container has a structure that allows gas to be discharged from the other side, and any material can be used as long as the location and installation conditions permit the deodorizing container.Cylindrical is the preferred container shape. For example, a mold or a box shape may be mentioned, and the material may be a corrosion-resistant material (for example, stainless steel) in consideration of corrosion (rust) due to moisture, but the material is not limited to these. The gas inlet side of the deodorizer container filled with the deodorizer should be sealed tightly (the exhaust point is limited to almost one place, and there is almost no leakage from other parts) as a disposable medical device. Effective deodorization can be achieved by connecting the deodorizer container to the exhaust port of the dissolving device and opening the other gas outlet side of the deodorizer container indoors, or connecting it to the opening of an exhaust duct leading to the outdoors.

The connection may be made in any position as long as the connection method is such that the gas from the exhaust port of the disposable medical device dissolving device does not leak directly to the outside; for example, it may be installed on top of the disposable medical device dissolving device. Alternatively, the device may be installed at a location separate from the disposable medical device dissolving device and connected via a duct, but the present invention is not limited thereto.

(Example) Next, the present invention will be explained in more detail with reference to Examples.

Example 1 A small amount of water was added to 600 g of 85% phosphoric acid, 2000 g of activated carbon, and 300 g of carboxymethyl cellulose sodium salt (hereinafter abbreviated as CMC) as a binder, and the mixture was thoroughly kneaded. It was pushed out from the die. The extruded udon-shaped deodorizing agent was immediately cut into 3 to 10-length pieces using a cutter and dried at 110°C to obtain a deodorizing agent. 1500g of the obtained deodorizer was placed in a 120cm x 25cm width box with two openings on the top and bottom.
When the deodorizing ability was tested by filling a box-shaped container with a height of 20C1 and connecting the lower opening to the exhaust port of a disposable medical device dissolving device with good airtightness, the exhaust gas that passed through the deodorizer layer was was almost odorless.

The results of the instrumental analysis are shown in Table 1.

The disposable medical equipment used in this example was 5c.
I was busy with 35 disposable syringes of various sizes from c to 20 cc.

Example 2 After adding a small amount of water to 600 g of 97% phosphorous acid, 2000 g of activated carbon, and 300 g of CMC as a binder and thoroughly kneading the mixture, the same procedure as in Example 1 was carried out to obtain a deodorizing agent in the form of a 5o diameter pour. 1,500 g of the obtained deodorizer was filled into a container in the same manner as in Example 1, and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness. The exhaust gas was almost odorless.

The disposable medical equipment used in this example was 5C
There were 35 disposable syringes of various sizes ranging from C to 20cc.

Example 3 After adding a small amount of water to 800 g of 50% hypophosphorous acid, 2000 g of activated carbon, and 300 g of CMC as a binder and thoroughly kneading, the same procedure as in Example 1 was carried out to obtain a deodorizing agent in the form of a 511-diameter pour. . Example 1 1500g of the obtained deodorizer
When the deodorizing ability was tested by filling a container in the same manner and connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness, the exhaust gas that had passed through the deodorant layer was almost odorless.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 4 300g of 50% sodium peroxide, synthetic zeolite 2
000 g, and 300 g of acrylic acid methyl ester polymer emulsion (50% solids) as a binder.
After adding a small amount of water and thoroughly kneading, the same procedure as in Example 1 was carried out to obtain a deodorizing agent in the form of a 5-inch diameter pour. 1 of the obtained deodorizer
When 500g was filled into a container in the same manner as in Example 1 and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness, the exhaust gas that had passed through the deodorant layer was almost odorless. there were.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 5 400g of 50% calcium peroxide, synthetic zeolite 2
After adding a small amount of water to 300 g of 000 g of acrylic acid methyl ester polymer emulsion (solid content 50%) as a binder and thoroughly kneading, a 5-diameter pour-shaped deodorizer was added in the same manner as in Example 1. Obtained. 15 of the obtained deodorizer
00g was filled into a container in the same manner as in Example 1, and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness.The exhaust gas that passed through the deodorant layer was almost odorless. there were.

The results of the instrumental analysis are shown in Table 2.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 6 400g of 50% hypophosphorous acid, 400g of 5Q% calcium peroxide, 400g of titanium dioxide, 200g of activated carbon
After adding a small amount of water to 300 g of CMC as a binder and thoroughly kneading, 5++ was prepared in the same manner as in Example 1.
A pour-shaped deodorizing agent with a diameter of ++g was obtained. 15 of the obtained deodorizer
00g was filled into a container in the same manner as in Example 1, and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness, and the exhaust gas that passed through the deodorant layer was almost odorless. there were.

The results of the instrumental analysis are shown in Table 3.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 7 97% phosphorous acid 400g, 50% calcium peroxide 4
00g5 Titanium dioxide 400g, activated carbon 2000g
After adding a small amount of water to 300 g of CMC as a binder and thoroughly kneading the mixture, a deodorizing agent was obtained in the same manner as in Example 1.

1,500 g of the obtained deodorizer was filled into a container in the same manner as in Example 1, and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness. The exhaust gas was almost odorless.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 8 85% phosphoric acid 300g, 50% calcium peroxide 4
00g.

A small amount of water was added to 400 g of titanium dioxide, 2000 g of activated carbon, and 300 g of sodium alginate as a binder, and the mixture was thoroughly kneaded, followed by the same procedure as in Example 1 to obtain a deodorizer.

1,500 g of the obtained deodorizer was filled into a container in the same manner as in Example 1, and the deodorizing ability was tested by connecting it to the exhaust port of a disposable medical device dissolving device with good airtightness. The exhaust gas was almost odorless.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 9 50% calcium peroxide 300g, zinc oxide 500g
After adding a small amount of water to 500 g of natural zeolite, 1500 g of activated carbon, and 300 g of acrylic acid methyl ester polymer emulsion (solid content 50%) as a binder and kneading thoroughly, a deodorizing agent was added in the same manner as in Example 1. Obtained.

When the deodorizing ability was tested in the same manner as in Example 1 using 1500 g of the obtained deodorizer, the exhaust gas that had passed through the deodorizer layer was almost odorless.

The results of the instrument analysis are shown in Table 4.

The disposable medical equipment used in this example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Comparative Example 1 Normally commercially available granular activated carbon (4 mm pk
The deodorizing ability was tested in the same manner as in Example 1 using 1500 g of the sample.

The results of the instrumental analysis are shown in Table 5, and although it could not be said that it was almost odorless, a strong odor was felt.

The disposable medical equipment used in this comparative example was 5c.
There were 35 disposable syringes of various sizes ranging from c to 20 cc.

Example 10 As a disposable medical device, a disposable blood collection bag and tube were used instead of a syringe, and the rest was the same as Examples 1 to 9.
When a deodorizing ability test was conducted in the same manner as in Example 1 to 9, almost the same results as in Examples 1 to 9 were obtained. However, the temperature set in the melting device was approximately 200°C.

(Effects of the Invention) According to the present invention, it is possible to efficiently deodorize malodorous gas generated when heat treating disposable medical instruments.

Patent applicant: Nippon Kayaku Co., Ltd.

Claims (1)

[Claims] 1. Heat treatment of a disposable medical device characterized by using a deodorizer containing at least one selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous acid, and peroxide. A method for deodorizing the foul-smelling gas generated when 2. The deodorizing agent according to item 1, which is used to deodorize malodorous gases generated during heat treatment of disposable medical instruments.