JPS586241A - Adsorbent - Google Patents

Abstract

PURPOSE:To obtain an adsorbent which has high adsorptive power, is easy to manufacture and is inexpensive by adding alkyl betaine type amphoteric surfactants to water absorbing and retaining agents of cellulosic glycolic acid type adsorbents and molding the mixture to granule. CONSTITUTION:Chalk consisting essentially of amino sugar is added to an aq. soln. prepd. by adding alkyl betaine type amphoteric surfactants to water absorbing and retaining agents of cellulosic glycolic acid type to prepare slightly soft slurry. After calcined plaster is added to this to make clayey material, this is forcibly passed through a screenlike filter to prepare granules. Since the resultant adsorbent has excellent water retaining property, it is superior in adsorptive power. Since it is easy to manufacture and inexpensive, it has wide applications.

Description

[Detailed Description of the Invention] The present invention relates to an adsorbent, more specifically, a granular adsorbent with high water retention properties. ·animal·
The present invention relates to an adsorbent suitable for use in an air purification device that removes furniture odors (hereinafter simply referred to as odors) and returns them to clean air and indoors.

Nowadays, it is common sense to use forced exhaust devices such as ventilation fans to remove odors in homes, restaurants, automobiles, and the like. In the case of a mechanical forced exhaust system, there are two methods: installing the device itself indoors using a duct V, and drilling a hole in the wall and burying a device such as a ventilation fan in the hole for exhaust.

However, duct-type ventilation systems are inconvenient because they require troublesome installation work to deal with odors generated in living rooms and parlors (in the case of barbecues, sukiyaki, etc.) that are not in kitchens or cooking areas, whether in a general home or in a restaurant. It is. Therefore, it was thought that it would be possible to somehow create an air purifying device that is integrated with lighting equipment without using ducts, but although the idea itself was simple, various experiments revealed more problems. The biggest difficulty is how to effectively remove odors. It is also widely practiced to remove odors by placing deodorizers in beautiful containers inside cars and toilets. However, even if you try to remove all the odor that has increased in concentration in a narrow space using a commercially available deodorizer, in practice it will only be like a gas and will hardly be expected to be effective.

In general, activated carbon and zeolite are known to adsorb Qi, and are actually being used, but the substances to be adsorbed, which are the substance of the odor targeted by the present invention, are diverse, and activated carbon and zeolite alone cannot withstand the role of the lateral bottom. It turns out there isn't. The types of adsorbed substances and their main components are listed below.

"Kou" (Ω) Category 1 Main formation
Odors from grilled meat and fish, amines, carbohydrates, air and smoke, sol vegetables, especially garlic, acrolein, tan/onion odor, decomposed substances, allyl ammonia, carbohydrates,
Hydrosulfides, thionyl compounds Cigarette odor and smoke Nicotine, tar, aroma components (mionumine, anabasine), tongue acyl Human body odor, especially aldehydes, ketones butyric acid, sweat odor Valeric acid Animals (pets) Amine, indole, odor of Cathol, protein bacteria, bacterial cell fluid and decomposition eluate, sulfide, uric acid, urea Odor of furniture and furnishings Paint plasticizers, various auxiliaries, ammonium, formalin Typical examples that have been plagiarized in the past The adsorption ability of activated carbon, which is an adsorbent, is limited to the phenomenon of concentration and adhesion of carbon to the porous walls, and it can adsorb and collect relatively single-molecule, so-called volatile substances, but it cannot absorb other organic decomposed components. It has been found that in this case, an oxide film forms when combined with moisture in the air, blocking the critical pore walls, resulting in a decrease in adsorption capacity within a relatively short period of time. Therefore, in order to develop a more effective adsorbent, this invention first investigated the substance of what is called a bad odor and discovered that the presence of moisture in the air has a large effect. In other words, it is a fact that the surface of the odor component molecules has an affinity with the water in the air, that is, moisture, and some kind of electrical action takes place, which becomes odor and is perceived by humans. Therefore, by artificially pushing this phenomenon further, a larger amount of activated water is created on the side of the adsorbent, which combines with moisture in the air to form a large number of water channels on a microscopic scale, within which the ionic and electrostatic effects are generated. They came up with the idea of accelerating the removal of malodorous components.

Therefore, the adsorbent of the present invention is a granular adsorbent that can be used in combination with conventionally used activated carbon and zeolite, and can take full advantage of their adsorption properties.

A detailed description will be given below based on examples.

In the example, a water-absorbing and
Water retention agent (product name “Aqua Keep” manufactured by Seitetsu Kagaku Kogyo) 6!
Add 325 parts of alkyl betaine type amphoteric surfactant to i+ to make an aqueous solution, and add 75 parts of white powder mainly composed of amino sugars.
Add 02 to create a slightly soft mud-like mixture, and add calcined gypsum 5 to this.
00 g was added to make the clay-like mixture, which was then forcibly passed through a mesh filter to form granules. The resulting granules were air-dried in the shade for about 2 hours to obtain slightly irregular granules as a whole.

This adsorbent can form a humidity zone that always holds about 10 to 15% moisture. As a result, this adsorbent layer forms one liquid phase, and malodorous components having high affinity with water are adsorbed in this liquid phase.

As an application example of the adsorbent obtained in this way, a mixture of 250 g of this adsorbent and 150 to 200 ft of zeolite is used as the primary layer of the filter of the forced exhaust device mentioned above. When the filter element was used as a filter element by placing a second layer of activated carbon adjacent to the glass fiber layer on both sides in a sandwich-like manner and encasing the entire structure in a frame, it was found that it had an extremely excellent deodorizing effect.

In the simplest test, we put a heaping tablespoon of rice bran miso into a regular drinking glass, closed it with the filter, and brought our noses close to the top of the filter, but we couldn't smell the notoriously bad smell of rice bran miso at all. A filter plate made of a mixture of ordinary activated carbon and zeolite was only effective in alleviating the odor to some extent.

The adsorbent of the present invention has an extremely superior adsorption ability not found in conventional adsorbents, and is also easy to manufacture and inexpensive, so it can be applied in various fields. That is, it can be used not only in the general household ventilation equipment or air purification equipment mentioned at the beginning, but also in the following applications. To name a few, air purifiers for the interior of automobiles, air purifiers for passenger aircraft and cruise ships,
Incorporation into air conditioning equipment in hospitals, movie theaters, meeting halls, factories, etc. (
It is especially effective in hospitals as it has a sterilizing effect), and is inserted into the insoles of shoes and the backrests of cars, etc. Place it in the lid of a garbage can or toilet, place it in a food storage facility or transport vehicle (also effective for preserving the freshness of perishable foods), put it in the lid of a pickle container, place it in an air-conditioner, or place it in the case of a sick person (especially a patient suffering from diabetes). For example, it may be placed next to the pillow or in an appropriate location within the hospital room. These are merely examples, and the scope of application is, of course, not limited to these.

Claims (1)

[Claims] To a solution obtained by adding a rukirubetaine-based amphoteric surfactant, chalk made mainly of amino sugars was added to make the whole paste-like, and then calcined gypsum was added to make it clay-like, and this was extruded into granules through a mesh. Adsorbent obtained by air drying.