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Preparation method of nanometer beryllium oxide material

A technology of nano-beryllium oxide and beryllium hydroxide, which is applied in the field of preparation of nano-beryllium oxide materials, can solve problems such as cumbersome steps, environmental pollution, and large particle size, and achieve the effects of precise preparation process, avoiding particle aggregation, and low roasting temperature

Pending Publication Date: 2022-05-10
上海太洋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods all have some technical problems, mainly are: (1) beryllium sulfate is directly roasted to generate beryllium oxide at a higher temperature (generally higher than 850 ° C), resulting in larger particle sizes after roasting and difficult control of particle size distribution. A large amount of sulfur-containing waste gas is produced; (2) Microemulsion method and sol-gel method often need to use a large amount of organic solvents such as surfactants and reaction initiators, which are likely to cause environmental pollution; (3) The existing preparation process often has cumbersome steps , the intermediate steps are not easy to accurately control, and a lot of manpower and material resources are wasted; (4) the existing technical route is not conducive to industrial scale-up production

Method used

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  • Preparation method of nanometer beryllium oxide material
  • Preparation method of nanometer beryllium oxide material
  • Preparation method of nanometer beryllium oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see Figure 1-Figure 16 , a method for preparing a nano-beryllium oxide material in the illustration, comprising the following steps:

[0041] S1. Preparation of beryllium sulfate solution and beryllium hydroxide suspension: Weigh analytically pure BeSO4 4H2O powder and dissolve it in deionized water to obtain a solution, keep stirring and add fatty amine, and strictly control the dropping rate to the final pH of the suspension 7.5 to 8.5, continue to stir for 30 to 60 minutes, and then leave the suspension to age for 12 hours;

[0042] S2. Preparation of beryllium hydroxide gel: Stir the suspension after standing still, filter with a vacuum filter funnel and fully filter and wash with deionized water to obtain a milky white gel;

[0043] S3. Hydrothermal pretreatment of beryllium hydroxide gel: redissolve the gel in deionized water and add polyvinylpyrrolidone and ammonium persulfate in proportion, stir evenly at a certain temperature and sonicate for 30min, transfer ...

Embodiment 2

[0054] see Figure 4 Illustrate embodiment 2, present embodiment is further described to embodiment 1, and stirring device 6 in the figure comprises the rotating tube 9 that is connected with support rod 5 rotations, and is fixedly connected with stirring bar 10 and pH value tester on rotating tube 9 11.

[0055] see Figure 1-Figure 2 and Figure 5-Figure 6 , the dripping device 7 in the illustration includes a storage box 12 for storing fatty amine, the first push plate 13 is slidably connected in the storage box 12, and the top of the first push plate 13 is slidably connected with the storage box 12 inner walls. The second push plate 14 of the storage box 12 is slidably connected with an adjustment plate 15, the top of the second push plate 14 is fixedly connected with a limit block 16 that is slidably connected with the adjustment plate 15, and the storage box 12 is rotatably connected with an adjustment plate. 15 threaded adjustment screw rod 17, the storage box 12 is ...

Embodiment 3

[0059] see Figure 7-Figure 10 Embodiment 3 is described. This embodiment further describes Embodiment 1. The switching device 27 in the illustration includes a driving disc 28 coaxially fixedly connected to the bottom surface of the driving wheel 24. There are multiple groups of first slide grooves provided on the rotating tube 9. 29, the first chute 29 is slidingly connected with a tooth block 30, the first chute 29 is fixedly connected with the first spring 31 fixedly connected with the tooth block 30, the tooth block 30 is fixedly connected with the limit column 32, and the drive plate 28 There is an arc-shaped groove 33 slidingly connected with the limit column 32 on the top, and the first gear 34 meshed with the tooth block 30 is connected to the support rod 5 in rotation. A linkage 35 that promotes fatty amines for intermittent dripping.

[0060] see Figure 7-Figure 11 , the linkage 35 in the illustration includes a first bevel gear 36 coaxially fixedly connected wit...

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Abstract

The invention discloses a preparation method of a nanometer beryllium oxide material, relates to the field of preparation of nanometer beryllium oxide materials, and solves the problems that an existing preparation method of the nanometer beryllium oxide material is tedious in step, needs to consume a large amount of heat energy and easily causes environmental pollution. Beryllium hydroxide gel is obtained through the steps of aging, filtering, washing and the like; polyvinylpyrrolidone and ammonium persulfate are introduced to form a polymer chain with a three-dimensional network structure in a water phase, and beryllium crystal grains are further refined through ultrasonic treatment; the beryllium-containing mixed solution is subjected to hydro-thermal treatment under certain conditions, insoluble substances are filtered, washed, dried and subjected to final high-temperature roasting to obtain the nanometer beryllium oxide material, the preparation method of the nanometer beryllium oxide material can reduce the roasting temperature, the particle size of nanometer particles is uniform, the particle size is about 10 nm, and the nanometer beryllium oxide material is environmentally friendly and has the advantage of being suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation of nano-beryllium oxide materials, in particular to a preparation method of nano-beryllium oxide materials. Background technique [0002] As a special national defense strategic material, beryllium oxide has been widely used in special metallurgy, nuclear reactor engineering, laser materials, aerospace materials and other fields. At present, the industrial production methods of beryllium oxide mainly include sulfuric acid method, fluorination method and sulfuric acid extraction method, among which sulfuric acid method is the most widely used process. The so-called sulfuric acid method refers to the use of sulfuric acid to acidify and decompose beryl, etc. to obtain beryllium-containing sulfate, and then to obtain beryllium oxide materials after impurity removal, precipitation, drying and roasting. The disadvantages of sulfuric acid process include cumbersome process, low product quality and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F3/02B01J19/18B01J4/00B82Y40/00
CPCC01F3/02B01J19/18B01J19/0066B01J4/001B82Y40/00C01P2004/04C01P2004/64
Inventor 马志明陈曼玉徐小峰秦明升姜朋飞程龙
Owner 上海太洋科技有限公司
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