Method for manufacturing crystals of aluminate of at least one metal and/or one metalloid and/or one lanthanide, and applications of same
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An aluminate, element technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, alkaline earth metal aluminate/alumina/aluminum hydroxide preparation, chemical instruments and methods, etc., can solve low productivity, Difficult to industrial scale and other issues
Pending Publication Date: 2019-05-24
依瑟尔锌有限公司
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Then, the capacity of the mill is usually limited to a few tens of grams (low productivity), so it is difficult to convert to industrial scale
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[0051] According to a first embodiment, the method according to the invention makes it possible to produce aluminate crystals of element A. According to this embodiment, the crystals thus obtained (after calcination) may conform to the general formula: Al x A y OHZ, where 02 o 4 、CaAl 4 o 7 、LiAl 2 o 5 Wait.
[0052] Typically, z=0 (non-hydrated crystals).
[0053] According to a second embodiment, the method according to the invention makes it possible to manufacture aluminate crystals of various elements A, denoted “A1”, “A2”, “An”, etc. According to this variant, the crystals thus obtained (after calcination) may correspond, for example, to the following general formula: A1 v (Al x A2 w )O 3 , where 01 / 2 Nb 1 / 2 )O 3 , Ca(Al 1 / 2 Nb 1 / 2 )O 3 orSr(Al 1 / 2 Ta 1 / 2 )O 3 .
[0054] In general, the method according to the invention makes it possible to produce aluminate crystals of element A.
[0055] To this end, the method for producing aluminate crystals of s...
Embodiment
[0221] The description of the following tests is given by way of illustration and non-limiting example only. Results are expressed in mass unless otherwise stated.
[0222] A Characterized by XRD
[0223] X-ray diffraction (XRD) spectra were collected using a D8ADVANCE Series II diffractometer sold by Bruker using CuKα1 radiation (0.15406 nm) according to a Bragg-Brentano configuration.
[0224] The detector used was a LynxEye 1D detector from Bruker. The aperture angle of the detector is 3° (150 bands).
[0225] XRD measurements were performed from 10° to 140° (2Θ scale) using a step size of 0.008° (1 sec / step).
[0226] B° Procedures for preparing test samples
[0227] equipment
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Abstract
To this end, the present invention concerns a method for manufacturing crystals of aluminates of one or more element(s) other than aluminium (Al), referred to as 'A', chosen separately from a metal, ametalloid or a lanthanide, said method comprising at least the following steps: placing starting reagents, comprising at least one aluminium element source and a source of said element(s) A that hasa degree of oxidation of between 1 and 6, in suspension in a liquid medium, so as to form a suspension referred to as the 'starting suspension', milling said starting suspension at an ambient temperature of less than or equal to 50 DEG C, in a three-dimensional liquid medium ball mill for a holding time of less than or equal to 5 minutes; recovering, at the outlet of said three-dimensional ball mill, a suspension referred to as the 'end suspension' comprising said starting reagents in activated form or crystals of aluminate of said element(s) A generally in hydrated form; if required, calcination of said end suspension when it comprises said starting reagents in activated form, so as to obtain generally non-hydrated crystals of aluminate of said element(s) A.
Description
technical field [0001] The invention relates to a method for producing crystals of aluminates of at least one metal and / or a metalloid and / or a lanthanide. [0002] In particular, the present invention relates to a process for the manufacture of crystals of these various aluminates, in particular carrying out the step of micromilling in a three-dimensional microbead mill in a liquid medium, usually water , in a very short time and without any special heating. This micromilling step also facilitates any calcination steps that may follow. [0003] The crystals obtained according to the method described above can be used for the manufacture of: materials emitting in the ultraviolet range, catalysts, in particular for the synthesis of biofuels, photocatalytic materials, photoluminescent materials, dielectric ceramics or strongly transparent materials. Background technique [0004] Various methods exist in the prior art for the preparation of homogeneous mixtures of aluminate p...
Claims
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