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Preparation method of anhydrous magnesium sulfate

An anhydrous magnesium sulfate, magnesium oxide technology, applied in directions such as magnesium sulfate, can solve the problems of high production cost, low quality, low output and the like, and achieve the effects of increased output, simple production method and low production cost

Inactive Publication Date: 2020-03-17
任洁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the preparation method for anhydrous magnesium sulfate is complicated, the production cost is high, the output is low, and the quality is not high.

Method used

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  • Preparation method of anhydrous magnesium sulfate

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention is further described:

[0020] Such as figure 1 A preparation method of anhydrous magnesium sulfate shown includes the following steps (1), reacting fuming sulfuric acid, boric anhydride, p-chlorophenol, and phthalic anhydride to obtain a solid reactant and a liquid reactant; (2), liquid reaction Add sulfuric acid to the product to dilute; (3), add magnesium oxide to the diluent to react; (4), cool and crystallize the obtained reactant to obtain crystallization liquid and crystallization product (5), crystallization liquid is concentrated and evaporated to obtain a concentrated liquid; (6) ), the concentrated solution is cooled and crystallized to obtain crystals (7), and the crystals are calcined to obtain anhydrous magnesium sulfate; the solid reactant is reacted by adding quicklime and hydrochloric acid, and the obtained reactant is spray-dried and then calcined to obtain anhydrous calcium chloride...

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Abstract

The invention discloses a preparation method of anhydrous magnesium sulfate, and belongs to the field of anhydrous magnesium sulfate preparation. The preparation method comprises the following steps:(1) reacting fuming sulfuric acid, boric anhydride, parachlorophenol and phthalic anhydride to obtain a solid reaction product and a liquid reaction product; (2) adding sulfuric acid to dilute the liquid reaction product; (3) adding magnesium oxide into the diluent for a reaction; (4) carrying out cooling crystallization on the obtained reaction product to obtain a crystal solution and a crystal substance; (5) carrying out concentrative evaporation on the crystal solution to obtain a concentrated solution; (6) carrying out cooling crystallization on the concentrated solution to obtain crystals; and (7) calcining the crystals to obtain the anhydrous magnesium sulfate. The anhydrous magnesium sulfate with high quality can be produced, and the preparation method has the advantages of simplicity, low production cost, and great increase of the yield, and can be used for preparing the anhydrous magnesium sulfate.

Description

technical field [0001] The invention relates to a preparation method of anhydrous magnesium sulfate. Background technique [0002] Magnesium sulfate can be used as tanning, explosives, papermaking, porcelain, fertilizer, and oral laxative in medical treatment. Magnesium sulfate is used as a fertilizer in agriculture because magnesium is one of the main components of chlorophyll. It is usually used for potted plants or magnesium-deficient crops, such as tomatoes, potatoes, roses, etc. The advantage of magnesium sulfate over other fertilizers is its higher solubility. Magnesium sulfate is also used as a bath salt. Magnesium sulfate, or anhydrous magnesium sulfate, is a compound containing magnesium. Anhydrous magnesium sulfate is a commonly used chemical reagent and drying reagent, but magnesium sulfate often refers to magnesium sulfate heptahydrate, which is white and small oblique or Oblique columnar crystal, odorless, bitter taste, clinically used for catharsis, cholere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/40
CPCC01F5/40C01P2006/82
Inventor 任洁
Owner 任洁