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Nanometer boehmite and preparation method thereof

A nano-boehmite and hydrothermal reaction technology, applied in the field of boehmite, can solve the problems of difficult industrial production, poor quality stability, and few product types, so as to avoid the use of strong acid and strong alkali, save costs, eliminate The effect of safety hazards

Inactive Publication Date: 2012-12-12
TIANJIN BOYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of nano-boehmite mainly adopts the neutralization process of aluminum glue, and the acid method and alkali method are used to prepare nano-boehmite. The products produced are few in variety and poor in quality stability. Strong acid and strong alkali, there are certain safety hazards, and the cost is high, which is not conducive to environmental protection
The relatively advanced aluminum alcohol method and the direct hydrolysis method of high-purity aluminum powder are only in the laboratory stage, and it is difficult to realize industrial production

Method used

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  • Nanometer boehmite and preparation method thereof
  • Nanometer boehmite and preparation method thereof
  • Nanometer boehmite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of nano-boehmite adopts the following raw material ratio:

[0026]

[0027] The preparation method of the nano boehmite comprises the following steps:

[0028] (1) Add pseudo-boehmite to deionized water at room temperature, stir mechanically for 15 minutes, add nitric acid, and continue stirring for 15 minutes;

[0029] (2) Add 3-aminopropyltriethoxysilane and continue stirring for 30 minutes;

[0030] (3) Add the feed liquid into a 1000ml high-pressure reactor, raise the temperature to 190°C, and keep it warm for 3 hours;

[0031] (4) Cool the feed liquid to below 50°C, discharge the feed liquid, wash the feed liquid with deionized water until the conductivity value is less than 300 μS / cm, and spray dry to obtain white powder A.

Embodiment 2

[0033] A kind of nano-boehmite adopts the following raw material ratio:

[0034]

[0035] The preparation method of the nano boehmite comprises the following steps:

[0036] (1) Add pseudo-boehmite to deionized water at room temperature, stir mechanically for 15 minutes, add acetic acid, and continue stirring for 30 minutes;

[0037] (2) Add 3-aminopropyltriethoxysilane and continue stirring for 30 minutes;

[0038] (3) Add the feed liquid into a 1000ml high-pressure reactor, raise the temperature to 210°C, and keep it warm for 5 hours;

[0039] (4) Cool the feed liquid to below 50°C, discharge the feed liquid, wash the feed liquid with deionized water until the conductivity value is less than 300 μS / cm, and spray dry to obtain white powder B.

Embodiment 3

[0041] A kind of nano-boehmite adopts the following raw material ratio:

[0042]

[0043] The preparation method of the nano boehmite comprises the following steps:

[0044] (1) Add pseudo-boehmite to deionized water at room temperature, stir mechanically for 15 minutes, add sulfuric acid, and continue stirring for 30 minutes;

[0045] (2) Add sodium carbonate and continue stirring for 30 minutes;

[0046] (3) Add the feed liquid into a 1000ml high-pressure reactor, raise the temperature to 170°C, and keep it warm for 6 hours;

[0047] (4) Cool the feed liquid to below 50°C, discharge the feed liquid, wash the feed liquid with deionized water until the conductivity value is less than 300 μS / cm, and spray dry to obtain white powder C.

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Abstract

The invention relates to a nanometer boehmite and a preparation method thereof. The nanometer boehmite is characterized by comprising the following components by weight: 50-150 parts of pseudo-boehmite, 1-10 parts of inorganic acid or inorganic base, 0.5-3 parts of additive and 400-750 parts of deionized water. The preparation method comprises the following steps: (1) dispersing pseudo-boehmite powder to the deionized water, adding the inorganic acid or the inorganic base for uniformly stirring; (2) adding the special additive and uniformly stirring to obtain feed liquid; (3) adding the feed liquid to a high-pressure reaction kettle for hydrothermal reaction; and (4) discharging after cooling, and spraying fog to obtain the nanometer boehmite after washing. By utilizing the preparation method, the nanometer boehmite with different morphologies can be prepared by taking the pseudo-boehmite as a starting material, the use of a large number of strong acid and alkali usage is avoided, a potential safety hazard is eliminated, the washing water consumption is reduced, the cost is saved, and the preparation method is conducive to energy conversation and environmental protection and can be used in different application occasions.

Description

technical field [0001] The invention belongs to the field of boehmite, in particular to a nano-boehmite and a preparation method thereof. Background technique [0002] As an important chemical raw material, nano-scale boehmite has been widely used in catalyst supports, fireproof and high temperature resistant fillers, polishing abrasives, as well as photo paper coatings and water treatment. At present, the production of nano-boehmite mainly adopts the neutralization process of aluminum glue, and the acid method and alkali method are used to prepare nano-boehmite. The products produced are few in variety and poor in quality stability. Strong acid and strong alkali have certain potential safety hazards, and the cost is relatively high, which is not conducive to environmental protection. The relatively advanced aluminum alcohol method and the direct hydrolysis method of high-purity aluminum powder are only in the laboratory stage, and it is difficult to realize industrial prod...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00
Inventor 李春刚鹿秀山郑江东崔津津王广磊
Owner TIANJIN BOYUAN NEW MATERIALS
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