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Preparation method of high-purity aluminum alkoxide

An aluminum alkoxide, high-purity technology, applied in the field of high-purity alumina preparation, can solve the problems of time-consuming, low energy consumption, time-consuming and unable to produce in batches, etc.

Active Publication Date: 2019-09-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with vacuum distillation, this method has the advantages of low energy consumption, small equipment volume and low cost, but it is very time-consuming, so it is difficult to promote in industrial production
The main principle of the extraction method is to dissolve the metal alkoxide in an organic solvent, so that the insoluble substance settles to the bottom of the reactor to obtain a relatively pure substance to separate the alkoxide from impurities. This method can mainly make up for aluminum isooctoxide The characteristics of such alkoxides that cannot be distilled under reduced pressure cannot be mass-produced in industrial production because the method is also time-consuming

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Embodiment Construction

[0015] The method of the present invention will be described in detail below in conjunction with specific examples. The purity of raw materials has a significant impact on product purity. The water content in n-hexanol should not be too high, generally below 600 μg / g, and the iron content in aluminum generally requires below 0.2% (mass).

[0016] The used raw material properties of embodiment are as follows:

[0017] N-hexanol: purity 99% (mass), water content 500μg / g. Isopropanol: purity 99% (mass), water content 3μg / g. Aluminum powder 1: the powder size is less than 0.5 μm, the purity is 99% (mass), and the iron content is 0.15% (mass). Aluminum powder 2: the powder size is less than 0.5 μm, the purity is 99% (mass), and the iron content is 0.09% (mass).

[0018] trans spinel Fe 3 o 4 It comes from natural magnetite, washed with 1M sulfuric acid, washed to neutral, and dried. Crystalline Fe 3 o 4 One: The particle size is 0.1mm~0.5mm; crystalline Fe 3 o 4 Two: The ...

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Abstract

The invention discloses a preparation method of high-purity aluminum alkoxide. The preparation method comprises the following step of enabling alcohol to react with aluminum to generate corresponding aluminum alkoxide; the preparation method is characterized by adding crystalline Fe3O4 solid particles in reaction materials. Compared with the prior art, the content of an iron impurity in a aluminum alkoxide product can be effectively reduced, so that the high-purity aluminum oxide can be further produced by using aluminum containing a certain amount of impurity iron, the cost of raw materials is reduced, and the product competitiveness is increased.

Description

technical field [0001] The invention relates to a method for preparing high-purity alumina, in particular to a method for preparing high-purity alumina by reacting organic alcohol with aluminum and hydrolyzing the reaction product. Background technique [0002] High-purity alumina has optical, electrical, magnetic, thermal, mechanical and catalytic properties that cannot be compared with ordinary alumina powder, and is mainly used in the fields of catalysis and information industry. In the field of catalysis, SB alumina is a kind of high-purity alumina, which is used as a carrier for various catalysts, but its production is difficult and the cost is high. [0003] SB alumina is produced by the alkoxide hydrolysis method. The main process is to produce alumina by hydrolysis of aluminum isopropoxide prepared from pure aluminum. According to the similarity of alcohol, n-hexanol can be used instead of isopropanol to prepare aluminum n-hexoxide and then hydrolyzed to produce alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/70C07C31/32
Inventor 高玉兰方向晨徐黎明彭绍忠吕振辉张学辉佟佳孙海
Owner CHINA PETROLEUM & CHEM CORP