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Preparation method and device for efficiently preparing magnesium hydroxide

A technology of magnesium hydroxide and magnesium oxide, applied in magnesium hydroxide and other directions, can solve the problems of large volume, long residence time and low hydration efficiency of the reaction vessel, and achieve the effect of improving the reaction conversion rate and reducing the volume

Active Publication Date: 2014-09-03
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, there are problems in the technical field of preparing magnesium hydroxide by hydration of magnesium oxide: due to the long residence time, the traditional hydration of magnesium oxide to prepare magnesium hydroxide is a batch process, the volume of the reaction vessel is large, and the water Low hydration efficiency and low hydration rate

Method used

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  • Preparation method and device for efficiently preparing magnesium hydroxide
  • Preparation method and device for efficiently preparing magnesium hydroxide
  • Preparation method and device for efficiently preparing magnesium hydroxide

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Effect test

Embodiment 1

[0029] A device for efficiently preparing magnesium hydroxide, comprising a mixing tank 1, a pressure control linkage unit I2, a reactor 3, a pressure control linkage unit II4, a condenser 5, a two-position three-way valve 6, a storage tank 7, and a pressure control unit Linkage unit III8, steam generator 9, the outlet 11 of the mixing tank is connected to one end of the pressure control linkage unit I2 through a pressure water pump, the other end of the pressure control linkage unit I2 is connected to the reactor feed port 31, and the reactor discharges Port 32 is connected to one end of the pressure control linkage unit II4, the other end of the pressure control linkage unit II4 is connected to one end of the condenser 5, the other end of the condenser 5 is connected to the first port 61 of the two-position three-way valve, and the second port of the two-position three-way valve 62 is connected to the return port 12 of the mixing tank, the third port 63 of the two-position th...

Embodiment 2

[0038] The difference with embodiment 1 is:

[0039] A preparation method for efficiently preparing magnesium hydroxide, said method comprising the steps of:

[0040] 1. Magnesium oxide and water are added to the mixing tank 1 and mixed evenly, and the magnesium oxide accounts for 5% of the total weight to obtain a magnesium oxide slurry;

[0041] ②Put the magnesium oxide slurry into the reactor 3 through the pump, turn on the steam generator 9, feed steam into the reactor 3, heat the reactor 3, control the pressure of the pressure control linkage unit I2 to 0.3~0.5MPa, and the pressure control linkage The pressure of unit II4 is 0.3-0.5MPa, the pressure of pressure control linkage unit III8 is 0.3-0.5MPa, the reaction temperature rises to 120-150°C, and the liquid in the reaction is returned to the mixing tank 1 through the second port 62 of the two-position three-way valve , and then returned to the reactor 3 by the mixing tank 1 to form a circulation loop, the circulation ...

Embodiment 3

[0047] The difference with embodiment 1 is:

[0048] A preparation method for efficiently preparing magnesium hydroxide, said method comprising the steps of:

[0049] ① adding magnesium oxide and water to the mixing tank 1 and mixing, the magnesium oxide accounts for 10% of the total weight to obtain a magnesium oxide slurry;

[0050] ②Put the magnesium oxide slurry into the reactor 3 through the pump, turn on the steam generator 9, feed steam into the reactor 3, heat the reactor 3, control the pressure of the pressure control linkage unit I2 to 0.2-0.3MPa, and the pressure control linkage The pressure of unit II4 is 0.2-0.3MPa, the pressure of pressure control linkage unit III8 is 0.2-0.3MPa, the reaction temperature rises to 90-120°C, and the liquid in the reaction is returned to the mixing tank 1 through the second port 62 of the two-position three-way valve , and then the mixing tank 1 is returned to the reactor 3 to form a circulation loop, and the circulation flow rate ...

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Abstract

The invention relates to a device for efficiently preparing magnesium hydroxide. The preparation device comprises a material mixing tank, a pressure control linking unit I, a reactor, a pressure control linking unit II, a condenser, a two-position three-way valve, a material storage tank, a pressure control linking unit III and a steam generator, wherein a discharging hole of the material mixing tank is connected with one end of the pressure control linking unit I by a pump; the other end of the pressure control linking unit I is connected with a charging hole of the reactor; the discharging hole of the reactor is connected with one end of the pressure control linking unit II; the other end of the pressure control linking unit II is connected with one end of the condenser; the other end of the condenser is connected with a first interface of the two-position three-way valve; a second interface of the two-position three-way is connected with a material return hole of the material mixing tank; a third interface of the two-position three-way valve is connected with the material storage tank; a steam inlet of the reactor is connected with one end of the pressure control linking unit III; the other end of the pressure control linking unit III is connected with the steam generator. The preparation method and the preparation device for efficiently preparing magnesium hydroxide disclosed by the invention have the beneficial effect of quickly and efficiently preparing magnesium hydroxide sizing agent.

Description

technical field [0001] The invention relates to a preparation method and device for efficiently preparing magnesium hydroxide. Background technique [0002] As a green material, magnesium hydroxide is widely used in fireproof materials, agriculture, and environmental protection. There are usually five ways to obtain magnesium hydroxide in industry: 1. Using limestone and brine to react to produce magnesium hydroxide; 2. Using sodium hydroxide to react with brine and brine to produce magnesium hydroxide; 3. Using calcined magnesite Mine, dolomite, brine, and brine blocks react to produce magnesium hydroxide; 4. React ammonia water, brine, and brine blocks to produce magnesium hydroxide; 5. Use magnesium oxide to hydrate to generate magnesium hydroxide. The magnesium oxide here must be a lightly burned product To ensure the activity of hydration. The most commonly used method is to obtain magnesium hydroxide by hydrating light-burned magnesia. The hydration is usually comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/14
Inventor 朱益民唐晓佳郭林刘全陈晨李铁
Owner DALIAN MARITIME UNIVERSITY
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