Zeolite, method for production thereof, adsorbent comprising said zeolite, heat utilization system, adsorption heat pump, heating and cooling storage system and humidity controlling air-conditioning a

An adsorbent and zeolite technology, applied in the field of air conditioning devices, can solve the problems of deprivation of zeolite adsorption capacity and zeolite instability, and achieve the effects of excellent durability and high adsorption capacity

Inactive Publication Date: 2006-07-26
MITSUBISHI PLASTICS INC
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  • Description
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Problems solved by technology

However, it is stated that zeolites from which the organic template has been completely removed are inherently unstable, and that the destruction of the crystal structure proceeds with the removal of the organic template, and that the complete removal of the organic template almost completely deprives the zeolite of its adsorption capacity

Method used

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  • Zeolite, method for production thereof, adsorbent comprising said zeolite, heat utilization system, adsorption heat pump, heating and cooling storage system and humidity controlling air-conditioning a
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  • Zeolite, method for production thereof, adsorbent comprising said zeolite, heat utilization system, adsorption heat pump, heating and cooling storage system and humidity controlling air-conditioning a

Examples

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preparation example Construction

[0200] Next, the calcining step in the method for preparing zeolite of the present invention will be explained.

[0201] The calcination step is a process of heat-treating the zeolite precursor that has been hydrothermally synthesized in the above-mentioned manner and separated under a given condition in a nitrogen-diluted air stream or the like or under vacuum. As a result, the zeolite of the present invention was produced.

[0202] In this calcination step, the calcination conditions are adjusted to control the removal of the nitrogen-containing organic template to thereby produce a zeolite containing at least a given amount of carbon or at least a given amount of nitrogen and carbon. A method may be employed in which, after the organic template is completely removed by calcination, a nitrogen-containing compound such as an organic compound, for example an organic amine such as methylamine or ethylamine is adsorbed onto the pore wall to thereby produce a compound containing ...

Embodiment 1-1

[0316] Hydrothermal synthesis and calcination were performed in the following manner to produce nitrogen-containing zeolites.

[0317] First 11.53g of 85% phosphoric acid was added to 28.05g of water. Thereto was gradually added 5.44 g of pseudo-boehmite (containing 25% of water, produced by Condea). The resulting mixture was stirred. This mixture is referred to as Liquid A. In addition to Liquid A, a liquid was prepared by mixing 5.56 g of ferrous sulfate heptahydrate, 4.35 g of morpholine, 5.06 g of triethylamine and 29 g of water. This liquid was gradually added to Liquid A and the resulting mixture was stirred for 3 hours to obtain a gel-like starting reactant material having the following composition.

[0318] 0.4FeSO 4 : 0.8Al 2 o 3 :P 2 o 5 : 1.0 Morpholine: 1.0 Triethylamine: 70H 2 o

[0319] The resulting starting reactant material was introduced into a 200-cc stainless steel autoclave equipped with a Teflon (trade mark) inner cylinder. The starting materia...

Embodiment 1-2

[0327] A roasted product as a nitrogen-containing zeolite was obtained in the same manner as in Example 1-1, except that the roasting temperature and the oxygen concentration in the passing gas were changed to 340° C. and 5% by volume, respectively.

[0328] The obtained calcined product had a nitrogen content of 1.7 wt%, a carbon content of 3.1 wt%, and a C / N weight ratio of 1.83. From the XRD pattern obtained in the same manner as in Example 1, it was found that the calcined product had a pure CHA structure (FD, 14.5 T / nm3).

[0329] Its water vapor adsorption capacity (25°C) was 27 wt%. The pore utilization factor determined using Equation 3 was 0.9. Durability Test 1 was carried out, as a result, no decrease in adsorption was observed and the degree of crystallinity remained unchanged. The weight loss (g1) and weight loss (g2) of the roasted product were further measured. The results are shown in Table 1.

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Abstract

The invention aims to provide a zeolite with less property degradation in repeated use or long period use and the preparation method, and also provide a sorbent containing the zeolite and a heat utilization system using the sorbent. The invention relates the zeolite with the frame density of 10T / nm<3> - 16T / nm<3> and carbon content of 1wt% - 6wt% and fulfilling two conditions that (1) the zeolite is al-phosphate with 1wt% - 6wt% carbon content and with part aluminum replaced by Me; (2) the zeolite is aluminosilicophosphate with part aluminum replaced by Me and keeping the frame structure before a baking course when baked until the carbon content is under 0.3wt%; (the condition is that the Me in the (1) and the (2) is selected from at least one of the elements from the 2A, 7A, 8, 1B and 2B families.).

Description

technical field [0001] The present invention relates to a specific zeolite and its preparation method, an adsorbent including the zeolite, a heat utilization system, an absorption heat pump, a cold / heat storage system, and an air conditioning device for humidity regulation . Background technique [0002] Zeolites are widely used as adsorbents, catalysts for acidic reactions, oxidation reactions, etc., separation materials, optical materials such as quantum dots and quantum wires, fine semiconductor particles used as magnetic materials, host materials for fluorescent substances, dyes, etc. ). According to the International Zeolite Association (hereinafter referred to as IZA), zeolites include crystalline silicates, crystalline aluminophosphates, and the like. [0003] Zeolites are usually prepared by using zeolite starting materials and a structure-directing agent (also called an organic template) for hydrothermal synthesis, and then removing the organic template by techniq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B37/06C01B37/08B01J20/18F25B17/08
CPCY02P20/129
Inventor 渡边展武胁隆彦山崎正典垣内博行稻垣孝治小坂淳细川德一
Owner MITSUBISHI PLASTICS INC
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