Mesostructured aluminosilicate material made of spherical particles of specific size

Active Publication Date: 2011-05-05
INST FR DU PETROLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003]The invention relates to a mesostructured aluminosilicate material consisting of at least two elementary spherical particles, each one of said spherical particles consisting of a matrix based on silicon oxide and aluminium oxide, said matrix having a pore diameter ranging between 1.5 and 30 nm, a Si/A

Problems solved by technology

The hydrothermal stability and acido-basicity properties thus developed by these aluminosilicates have however not allowed them to be used at an industrial stage in refining or petrochemistry processes, which has progressively led to the use of new structuring agents such as amphiphilic macromolecules of block copolymer type, the latter leading to mesostructured materials having a generally hexagonal, cubic or lamellar structure, pores of uniform diameter ranging from 4 to 50 nm and amorphous walls of thickness ranging from 3 to 7

Method used

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Examples

Experimental program
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example 1 (

Invention)

Preparation of an Aluminosilicate Material of Si / Al Ratio=4 According to the Main Preparation Method of the Invention

[0038]1 kg hexahydrated aluminium trichloride is added to a solution containing 10 kg ethanol, 5 l water, 36 ml HCl and 1.4 kg surfactant CTAB. The assembly is left under stirring at ambient temperature until complete dissolution of the aluminic precursor. 3.6 kg tetraethylorthosilicate (TEOS) are then added. After 10-min stirring at ambient temperature, the assembly is atomized by means of a “mono-fluid” spray nozzle in a chamber into which a carrier gas, a dry air / nitrogen mixture, is sent. The droplets obtained by atomization are dried between 100° C. and 120° C. according to the protocol described in the above description of the invention, in accordance with stage c) of the main method of the invention. The particles are collected in a bag filter. Said particles are crushed by means of a jet mill and brought down to some pm (3 to 5 μm). A 30 wt. % fract

example 3 (

Invention)

Preparation of an Aluminosilicate Material of Si / Al Ratio=9 According to the Simplified Preparation Method of the Invention

[0040]520 g hexahydrated aluminium trichloride are added to a solution containing 10 kg ethanol, 5 l water, 36 ml HCl and 1.4 kg surfactant P123. The assembly is left under stirring at ambient temperature until complete dissolution of the aluminic precursor. 4.0 kg tetraethylorthosilicate (TEOS) are then added. After 18-hour stirring at ambient temperature, the assembly is atomized by means of a “mono-fluid” spray nozzle in a chamber into which a carrier gas, a dry air / nitrogen mixture, is sent. The droplets obtained by atomization are dried between 100° C. and 120° C. according to the protocol described in the above description of the invention, in accordance with stage c) of the simplified method of the invention. The particles are collected in a bag filter in form of a powder that is then calcined in air for 5 hours at T=550° C. in order to remove

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Abstract

A mesostructured aluminosilicate material is described, which consists of at least two elementary spherical particles, each one of said spherical particles consisting of a matrix based on silicon oxide and aluminium oxide, said matrix having a pore diameter ranging between 1.5 and 30 nm, a Si/Al molar ratio at least equal to 1 and amorphous walls of thickness ranging between 1 and 30 nm, said elementary spherical particles having a diameter D such that 10<D(μm)≦100. A method of preparing said material and its application in the spheres of refining and petrochemistry are also described.

Description

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Claims

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Application Information

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Owner INST FR DU PETROLE
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