Method for separation of components and separation unit

A separation method and separation device technology, applied in the separation method, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of unstable separation of components, poor acid resistance, etc., and achieve the effect of inhibiting capillary condensation and long-term stable component separation

Inactive Publication Date: 2007-09-12
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned highly hydrophilic zeolite crystals generally have poor acid resistance, and when using zeolite crystals to separate water from the above-mentioned water-soluble organic substances, there is a problem that the components cannot be separated stably.

Method used

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  • Method for separation of components and separation unit
  • Method for separation of components and separation unit
  • Method for separation of components and separation unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2

[0086] First, LTA-type zeolite powder is made into granules. Then, the pH 4 aqueous solution of acetic acid is boiled under normal pressure, the steam and zeolite particles are heated to 130°C which does not cause capillary condensation, and the generated steam is brought into contact with the zeolite particles. Next, the LTA-type zeolite particles were treated at this temperature for 20 hours as Example 1. In addition, the LTA-type zeolite particles were treated for 100 hours in the same manner as Example 2.

[0087] The sample treated under the above conditions was taken out from the sample tube and dried overnight at room temperature, and then the particles were powdered. The crystal structure of the particles was analyzed by XRD (X-ray Diffraction). In addition, the crystal structure of the LTA-type zeolite powder before the above treatment was also analyzed by XRD. In FIG. 6 , the analysis results are shown with the angle on the horizontal axis and the intensity on the...

Embodiment 3

[0092] A zeolite membrane densely formed of LTA-type zeolite crystals is formed on a tubular alumina porous support. Specifically, this zeolite membrane was produced as described below.

[0093] First, fine particles of type A zeolite (100 nm in particle diameter) were added to water and stirred to prepare a slurry having a concentration of 0.5% by mass. A tubular porous support made of α-alumina (average pore diameter 1.3 μm, outer diameter 10 mm, inner diameter 6 mm, length 13 cm) was immersed in the slurry for 3 minutes, and then lifted at a speed of about 0.2 cm / s. Then, after drying in a 25 degreeC thermostat for 2 hours, it dried in a 70 degreeC thermostat for 16 hours. Then mix sodium silicate, aluminum hydroxide and distilled water so that the molar ratio of each component is SiO 2 / Al 2 o 3 = 2, Na 2 O / SiO 2 = 1, H 2 O / Na 2 O=75, make a hydrothermal reaction solution. The porous support provided with the seed layer was immersed in the reaction solution, and k...

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Abstract

To provide a method for separating component, wherein a part of components is separated from a mixed composition which includes water and acid, without causing degression in the characteristics of the zeolite crystal is aimed for. The aim is solved by a method for separating a component from a mixed composition which includes water and organic acid such as acetic acid by using zeolite crystal, and wherein the mixed composition is brought into vapor 16; and the vapor 16 of the mixed composition is heated by a ribbon heater 13 up to a temperature of not inducing capillary condensation of the vapor 16 of the mixed composition when the vapor 16 of the mixed composition comes into contact with the zeolite crystal 11.A method for the separation of components by which an acid component can partially be separated from a mixture comprising the acid component and water without deteriorating the properties of crystalline zeolite. Namely, a method for separating partially an organic acid component (such as acetic acid) from a mixture comprising the acid component and water by using crystalline zeolite, wherein when a vapor (16) of the mixture is brought into contact with crystalline zeolite (11), the vapor (16) is heated with a ribbon heater (13) to such a temperature as to inhibit the vapor (16) from capillary condensation.

Description

technical field [0001] The present invention relates to a component separation method and a component separation device for separating components from a component system containing at least water and organic acid components using zeolite crystallization. technical background [0002] Zeolite is a crystalline substance having a tetrahedron-connected skeleton structure in which four oxygens are coordinated to cations, and has micropores of Angstrom order. [0003] At present, a method of separating one component from a mixture of two or more components by using the selective adsorption energy of the micropores of zeolite crystals and the molecular sieve energy has been extensively studied. [0004] As such a separation method, there is a molecular sieve method (for example, refer to Patent Document 1) in which a zeolite crystal powder is used to perform a separation operation using a method called pressure swing adsorption (pressure swing adsorption), or a zeolite crystal memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D53/22
CPCB01D71/028B01D2313/38B01D2257/70B01D53/02B01D2253/108B01D2313/221B01D71/02B01D71/0281
Inventor 林穗文池田史郎
Owner MITSUBISHI CHEM CORP
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