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Conversion of gaseous carbon dioxide into aqueous alkaline and/or alkaline earth bicarbonate solutions

A bicarbonate, alkaline earth metal technology, applied in the directions of alkali metal carbonate, bicarbonate preparation, alkali metal compounds, etc., can solve the problems of poor mechanical resistance, low cation exchange capacity, poor chemical stability, etc., to improve effect of influence

Inactive Publication Date: 2014-07-16
SILICA DE PANAMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] These relatively inexpensive hydrogen carbonaceous zeolites have several disadvantages: low cation exchange capacity (less than 1 meq / g), poor mechanical resistance (not suitable for pressurized, bubbling, or fluidized beds), and resistance to alkali metals ( Sodium bicarbonate solution or sodium carbonate solution) has poor chemical stability, so that the carbon particles enter the bicarbonate solution or carbonate solution and then become a colloidal solution (F. Helfferich. Ion Exchange. Chap2, pp17-18. Dover Publications Inc. 1995 (F. Helfferich, "Ion Exchange", Chapter 2, pp. 17-18, Dover Press, 1995); M Kodama, N.Shimisu, et al.Carbon28(1):199-205(1990) ( M Kodama, N. Shimisu et al., Carbon, 28(1):199-205(1990)))
[0022] The prior art methods for obtaining sodium bicarbonate solutions clearly still have many deficiencies

Method used

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  • Conversion of gaseous carbon dioxide into aqueous alkaline and/or alkaline earth bicarbonate solutions
  • Conversion of gaseous carbon dioxide into aqueous alkaline and/or alkaline earth bicarbonate solutions
  • Conversion of gaseous carbon dioxide into aqueous alkaline and/or alkaline earth bicarbonate solutions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] A blank or control run was done without any cation exchanger material. 150 mL of pre-boiled and demineralized water tempered at room temperature was added to a well cleaned 250 mL scrubbing flask 7 . On / off valve 4 is opened, nitrogen stream from source 2 is flowed at a rate of at least 250 ml / min at a pressure of 14 psig, and gas diffusing agent (8) is introduced into flask 7. The nitrogen flow time is at least 5 minutes. Then, change three-way valve 3 to flow 14 psig carbon dioxide gas from source 1 at a rate of at least 250 ml / min. The carbon dioxide gas flow time was 30 minutes at room temperature.

[0120] Using the previously mentioned analytical procedure, the amount of bicarbonate formed (as an anion) was 238 mg / L.

Embodiment 2

[0122] In this example, the XC sodium form of the cation exchanger material was tested. This is a commercial microsphere of faujasite type X zeolite whose X-ray diffraction pattern is shown in figure 2 middle. The ratio of silicon to aluminum (mol / mol) is given by chemical analysis, and the BET specific surface area (S) is shown in Table 1 of Example 3. image 3 Scanning electron micrographs are provided showing the overview of microspheres of the XC material, varying in size roughly between 5 μm and 100 μm. Figure 4 A scanning electron microscope photograph of microspheres of this XC cation exchanger material is shown.

[0123] A mass of cation exchanger material XC was charged to a well cleaned scrubbing flask 7 and the procedure described in Example 1 was carried out. The time for flowing the carbon dioxide gas was also 30 minutes.

[0124] Using the previously mentioned analytical procedure, the amount of bicarbonate formed (as an anion) was 427 mg / L and the phenolph...

Embodiment 3

[0127] This example examines various sodium form cation exchanger materials of the aluminosilicate type. In addition to the cation exchangers described in Example 2, the properties of other cation exchangers are also shown in Table 1 below. Figure 5 The X-ray diffraction pattern of the AC material is shown, which is representative of a typical type A zeolite. AC materials consist of a set of image 3 Microspheres with the size distribution shown in . Both AA material and AX material are X-ray amorphous materials, and their patterns are shown in Figure 6 and Figure 7 middle. These materials are obtained from the gels normally used for the synthesis of zeolites A and X, respectively, but their synthesis is terminated before the crystal growth stage in order to obtain a small core and thus a larger outer surface. Figure 8 shows AA material and AX material in the zeolite framework range 380cm -1 ~1300cm -1 in the infrared spectrum. They show some bands of the typical I...

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Abstract

A material with cationic exchanger properties is introduced into aqueous media, where the equilibriums of carbon dioxide dissolution take place. A cationic exchanger material x / nMw E,- is used to capture hydronium cations (H3O<+>) according to: x / nM<+n>Ex<->(s) + xH3O<+>(aq) = xH3O<+>Ex<->(s) + x / nM<+n>(aq) where "x" stands for molar amount of the anionic centers of charge of the cationic exchanger material E<x-> balanced by x / n molar amount of metal M, "n" stands for the metal valence, and M is selected from the group consisting of 1A and / or 2A of the periodic table of elements. This capture of the hydronium cations, H3O<+>, shifts certain reaction equilibriums to the right, according to Le Chatelier's principle, producing more bicarbonate, HCO3<->, and / or carbonate, CO3<=>, than would otherwise be obtained.

Description

technical field [0001] The present invention relates to the conversion of gaseous carbon dioxide into an aqueous solution of alkali metal bicarbonate and / or alkaline earth metal bicarbonate for the production of solid alkali metal bicarbonate, solid alkali metal carbonate and / or solid alkaline earth metal carbonate solution. In a preferred embodiment, the present invention entails the conversion of a feed stream of gaseous greenhouse carbon dioxide to alkali metals using solid renewable inorganic cation exchanger materials, specifically crystalline or amorphous aluminosilicates Bicarbonate solution and / or alkaline earth metal bicarbonate solution. Background technique [0002] Most solid alkali metal bicarbonates and carbonates are obtained from their aqueous solutions by conventional evaporation or crystallization methods. These bicarbonates and carbonates have many applications in everyday life. It will be mentioned that the two most commonly used are sodium carbonate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D7/00C01F11/18C01B32/60
CPCB01J39/02B01J39/14B01J49/06B01J49/53C01B32/60C01D7/00C01F11/18C01F11/181C01P2002/72C01P2002/82C01D7/10
Inventor 胡安·鲁加诺哈维尔·热沃特诺尔玛·瓦伦西亚路易斯·里瓦斯尼尔森·索科罗
Owner SILICA DE PANAMA
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