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Preparation process of boric acid

A production process and boric acid technology, which is applied in the directions of boron oxyacids, boron oxy compounds, etc., can solve the problems of excessive by-products, low yield and high cost, and achieve low by-products, high yield and low production cost. Effect

Pending Publication Date: 2021-12-31
河北昊德生物科技有限公司
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Problems solved by technology

[0004] At present, boric acid is mostly produced by petrochemical methods, with high cost, too many by-products, low yield and low purity.

Method used

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  • Preparation process of boric acid
  • Preparation process of boric acid

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see Figure 1-2 , a manufacturing process of boric acid, comprising the following steps, S1, boron slag washing, adding saturated boric acid mother liquor (generally the cold mother liquor of the cooling crystallization section) in the coarse boron slag in the workshop, so that impurities such as part of magnesium chloride and magnesium sulfate enter the liquid phase , to separate part of the impurities; S2, hot-melt filtration, add fresh water and part...

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Abstract

The invention relates to the technical field of chemical industry, and discloses a production process of boric acid. The production process comprises the following steps: S1, performing boron slag washing: adding a saturated boric acid mother liquor into coarse boron slag, enabling part of magnesium chloride, magnesium sulfate and other impurities to enter a liquid phase, and separating part of the impurities; S2, performing hot melting and filtering: adding freshwater and part of the saturated boric acid mother liquor into the washed coarse boron slag, and heating to enable all boric acid to enter the liquid phase; S3, performing cooling crystallization: cooling the hot boric acid mother liquor to normal temperature through a vacuum crystallizer, separating a solid phase from the mother liquor by boric acid, and separating to obtain crude boric acid; S4, performing boric acid washing: adding pure water into the crude boric acid, enabling a small amount of magnesium chloride, magnesium sulfate and other impurities entrained in the crude boric acid to enter the liquid phase, and obtaining wet boric acid; and S5, drying and packaging: dehydrating the wet boric acid through steam heating, and packaging to obtain a boric acid product. The preparation process of boric acid is simple, low in preparation cost, few in by-products and high in yield, and the prepared boric acid is high in purity.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production process of boric acid. Background technique [0002] Boric acid is a hydrate of boron oxide (B 2 o 3 .3H 2 O), boric acid is a white powdery crystal or triclinic scale-like shiny crystal, with a smooth feel, no odor, soluble in water, alcohol, glycerin, ethers and essential oils, the aqueous solution is weakly acidic, and is widely used in glass (Optical glass, acid-resistant glass, heat-resistant glass, glass fiber for insulating materials) industry, can improve the heat resistance and transparency of glass products, increase mechanical strength, and shorten melting time. [0003] There are following defects and deficiencies in the prior art: [0004] At present, boric acid is mostly produced by petrochemical methods, with high cost, too many by-products, low yield and low purity. Contents of the invention [0005] Aiming at the deficiencies in the ...

Claims

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Application Information

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IPC IPC(8): C01B35/10
CPCC01B35/1045
Inventor 郝波郝俊芳范红月
Owner 河北昊德生物科技有限公司
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