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Metal-contg. macrostructures of porous inorganic oxide, prepn. thereof, and use

A macrostructure, metal technology, applied in the field of metal-containing macrostructures, which can solve the problems of formation of unwanted products, reduction of zeolite efficiency, and deterioration of aggregate adsorption properties.

Inactive Publication Date: 2002-07-03
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, amorphous binders degrade the adsorptive properties of aggregates due to binders typically used in amounts as high as about 60 wt% of the combined catalyst.
Furthermore, since the preparation of bound zeolites involves extrusion or formation of zeolites with amorphous binders, followed by drying and calcination of the extrudates, the amorphous binders may penetrate the pores of the zeolites or block the zeolites. entrance to the pores, or slows the rate of mass transfer to and from the pores of the zeolite, thereby reducing the efficiency of the zeolite when used in hydrocarbon conversion processes and other applications
In addition, when bound zeolites are used in catalytic conversion processes, the amorphous binder may affect the chemical reactions taking place within the zeolites while also catalyzing undesired reactions that lead to the formation of unwanted products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1I

[0122] Example 1I. Preparation of Catalyst A - Macrostructure Comprising ZSM-5 and Palladium

[0123] Prepare a solution containing 0.01M palladium(II) chloride (PdCl 2 ) in 1M HCl solution. A macroporous strong base anion exchanger, commercially available under the trade name Dowex MSA-1 [chloride type], was then added to the contents of the beaker. The weight ratio of resin to Pd was 1:10 (10 g resin and 100 g Pd solution). Thereafter, the beaker was placed in a shaker for 1 hour. Then, the particles were separated, rinsed several times with distilled water, filtered, and dried at 105 °C.

[0124] In an autoclave, set the molar composition to 0.31 Na 2O: 9TPAOH: 0.25Al 2 o 3 : 25SiO 2 : 405H 2 22 g of the synthesis solution of O was added to 1.1 g of the dried palladium-supported ion exchanger. The mixture of ion exchanger and synthesis solution was aged at room temperature for 1 hour and then heated at 170 °C for 17 hours. Then, the particles ...

Embodiment 2

[0130] Samples A and B were subjected to xylene isomerization / ethylbenzene dealkylation reaction experiments respectively. The experiment was carried out as follows: firstly, 50 mg of 40-60 mesh catalyst was filled in a stainless steel reactor. The catalyst was heated at 450°C with H 2 Pretreatment for 2 hours followed by contact with a 50:50 ethylbenzene:m-xylene and hydrogen co-feed. The total pressure of the reaction was controlled at 54 psia. The partial pressure of the ethylbenzene feed was 3.4 psia, the partial pressure of the m-xylene feed was 3.4 psia, the H 2 The partial pressure of the feed was 47.2 psia. The hydrocarbon flow rate was 7.7 μl / min. The hydrogen flow was controlled by a Brooks mass flow controller and the hydrocarbon feed stream was pumped by a syringe pump. The temperature studied in the experiment was 200-500°C. All products were analyzed by an online HP 6890 GC equipped with a ChirasilDEX CP column. Table I below shows the results of experimen...

Embodiment 3

[0134] Example 3 Preparation of macrostructures comprising ZSM-5 and chromium

[0135] In a beaker, 4 g of MSA-2 ion exchange resin was exchanged with 40 g of chromium-EDTA complex solution. Place the beaker in the shaker for 1 hour. Then, the particles were separated, rinsed several times with distilled water, filtered, and dried at 105 °C.

[0136] In an autoclave, with a molar composition of 0.31 Na 2 O: 9TPAOH: 0.25Al 2 o 3 : 25SiO 2 : 405H 2 30 g of the ZSM-5 synthesis solution of O was used to treat 1.5 g of the dried chromium-loaded ion exchanger. The mixture of exchanger and synthesis solution was aged at room temperature for 1 hour and then heated at 170 °C for 17 hours. After synthesis, the resin-zeolite composite was isolated from the monolithic crystallized zeolite, treated in a 0.1 M ammonia solution in an ultrasonic bath for 5 min, rinsed several times with distilled water, and then dried at 60 °C. Thereafter, the ion exchanger was r...

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PUM

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Abstract

There is provided a catalyst containing porous macrostructures comprised of: (a) a three-dimensional network of particles of porous inorganic material; and, (b) at least one metal. The particles of the at least one macrostructure occupy less than 75 % of the total volume of the at least one macrostructure and are jointed together to form a three-dimensional interconnected network. The three-dimensional interconnected network will usually be comprised of pores having diameters greater than about 20 ANGSTROM . The macrostructures can be made by forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material and the at least one metal; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the organic material. The metal-containing macrostructures find application in hydrocarbon conversion and in the reduction of emissions.

Description

field of invention [0001] The present invention relates to metal-containing macrostructures of porous inorganic oxides, processes for the preparation of metal-containing macrostructures and uses of metal-containing macrostructures. Background of the invention [0002] Mesoporous inorganic materials and microporous inorganic materials are both characterized by a large specific surface area in the pores, and they are widely used in fields with great industrial application prospects. It is an important fact that in most applications the phase interface between the solid porous material and the medium used (liquid or gas) is very large. For example, these porous inorganic materials are often used as catalysts and catalyst supports in hydrocarbon conversion processes. Meanwhile, these porous inorganic materials are also frequently used as adsorbents for selective adsorption in gas or liquid phase, or selective separation of ionic compounds. Herein, the terms "porous inorganic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44B01J29/48B01J29/74B01J29/76B01J37/00C07B61/00C07C5/27C07C6/12C07C15/04C07C15/08C07C45/53C07C49/04C10G11/05C10G45/64C10G47/16
CPCB01J2229/60B01J29/7615B01J37/0018B01J29/7415B01J29/48B01J29/44B01J37/0009B01J29/064
Inventor G·D·莫尔W·J·墨迪尔冯小兵P·J·斯蒂尔特L·B·托施瓦
Owner EXXONMOBIL CHEM PAT INC
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