Antimony pentoxide dispersion preparation method

An antimony pentoxide and antimony trioxide technology, which is applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc., can solve the problems of inability to produce flame retardant fibers, achieve good dispersion and stability, small force, Conducive to the effect of evaporation and concentration

Inactive Publication Date: 2004-11-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The spinneret aperture of synthetic fibers can be as fine as 0.15 μm or even smaller, so antimony pentoxide ...

Method used

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preparation example Construction

[0013] The invention relates to a method for preparing antimony pentoxide dispersion liquid. That is, the organic acid acetic acid, butyric acid or benzoic acid and the weaker polar cyclic tertiary amine dispersion stabilizer N-hydroxyethyl morpholine, N-(2-hydroxypropyl) morpholine, N-hydroxyethyl Dissolve one or more equal mixtures of piperidine and N-ethylmorpholine in water, add antimony trioxide to stir and disperse, then use hydrogen peroxide to oxidize antimony trioxide to antimony pentoxide, The reaction solution is concentrated, aged and concentrated to obtain a dispersion liquid of antimony pentoxide with a content greater than 50%. The process is as follows:

[0014] (1). Add antimony trioxide into water 3 to 5 times its own weight by weight, then add an organic acid with an amount of 1.8 to 2.2% of antimony trioxide and a dispersion stabilizer of 2 to 5%, and stir;

[0015] (2) Drop in 2 to 2.4 times the amount of antimony trioxide, hydrogen peroxide with a conte...

Embodiment 1

[0022] Add 1.8g of acetic acid and 0.4g of N-hydroxyethylmorpholine to 400g of water, add 100g of antimony trioxide under stirring state, disperse evenly, drop 2 to 2.4 times the amount of antimony trioxide, and the content is 30 to 50% The hydrogen peroxide was dropped within half an hour, and the temperature was raised to 70-95°C for 3 hours. Concentrate under normal pressure until the total weight of the reaction solution is 352g, stir at a constant speed at 60-70°C for 1.5 hours, then continue to concentrate the reaction mixture to a total weight of 208g to obtain a light milky product. The antimony pentoxide content is 53%, the viscosity is 8.9mPa·S, and the pH value is 6.3.

Embodiment 2

[0024] Take 300g of water, add 1.0g of benzoic acid, 1.2g of acetic acid, 2.0g of N-(2-hydroxypropyl)morpholine, 1.5N-hydroxyethylpiperidine, stir, add 100g of antimony trioxide, disperse evenly, drop into 2-2.4 times the amount of antimony trioxide, hydrogen peroxide with a content of 30-50%, is dropped within half an hour, and the temperature is raised to 80-95° C. for 2.5 hours. Concentrate under normal pressure until the total weight of the reaction solution is 377g, stir at a constant speed at 60-70°C for 2.5 hours, then continue to concentrate the reaction mixture to a total weight of 194g to obtain a light milky product. The antimony pentoxide content is 56%, the viscosity is 9.3mPa·S, and the pH value is 7.0.

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Abstract

The invention provides a process for preparing antimony pentoxide ethanol dispersion which can be used as special flame retardant, catalyst and surface processing agent, comprising the steps of, dissolving organic acid and dispersion stabilizer into water, charging antimony trioxide, mixing for dispersion, oxidizing antimony trioxide into antimony pentoxide by hydrogen dioxide, carrying out concentration, ageing and concentration to the reaction liquid for producing antimony pentoxide content of over 50%, whose grain size is between 1-20 nm, viscosity is less than 10mPaS, pH=6.0-7.0.

Description

technical field [0001] The invention belongs to the technical scope of chemical material preparation, and in particular relates to a preparation method of an antimony pentoxide dispersion liquid which can be used as a special flame retardant, catalyst and surface treatment agent. technical background [0002] US38605823, US3994325, US4348301, US4351741, US5008036, US6040371, EP134708, CN1074945 public reports are to use different raw materials or methods to prepare antimony pentoxide dispersion liquid with water as medium, wherein US3994325, US6040371, US5008036 are similar to the present invention. The method for producing antimony pentoxide publicly reported in US3994325 is to mix antimony trioxide with fatty polyhydric alcohol and oxidize with hydrogen peroxide to obtain a colloidal antimony pentoxide. This product has high surface activity and poor dispersion. The method disclosed in US5008036 is to react antimony trioxide aqueous slurry with hydrogen peroxide with or w...

Claims

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Application Information

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IPC IPC(8): C01G30/00C08K3/22C09C1/00C09C3/04
Inventor 王晓慧赵建玲李龙土
Owner TSINGHUA UNIV
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