The method that utilizes magnesium sulfate raw material to prepare magnesium hydroxide
A technology of magnesium hydroxide and magnesium sulfate, applied in directions such as magnesium hydroxide, can solve the problems of expensive organic amines, and achieve the effects of low price, convenient operation and small circulation
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[0027] Example 1
[0028] The raw materials used in the present invention are: a. 1 part of calcium nitrate, which is 1 mol; b. 1 part of organic amine, which is di-n-butylamine, which is 2 mol; c. 1 part of calcium oxide-containing raw materials, and determine its effective oxidation before use The calcium content is 1 mol; d. 2 parts of magnesium sulfate raw material, the content of magnesium sulfate is determined before use, and each part is 1 mol.
[0029] The start-up step of the process cycle of the present invention is to first formulate calcium nitrate into a 1mol / L solution, then slowly add magnesium sulfate raw material to the solution, and then filter to obtain filter residue A (i.e. green gypsum) and filtrate A (i.e. magnesium nitrate solution) ), the filter residue A is washed to obtain green gypsum, and the filtrate A enters the circulation process. The steps of the circulation process are: 1) Preparation of magnesium hydroxide: add organic amine to the filtrate A, st...
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[0033] Example 2
[0034] The raw materials used in the present invention are a. 1 part of calcium nitrate, which is 1 mol; b. 1 part of organic amine, which is di-n-pentylamine, which is 2.4 mol; c. 1 part of calcium oxide-containing raw materials, which is determined to be effective before use The content of calcium oxide is 1.2 mol; d. 2 parts of magnesium sulfate raw material, the content of magnesium sulfate is determined before use, and each part is 1 mol.
[0035] The starting step of the process cycle of the present invention is to first formulate calcium nitrate into a 0.1 mol / L solution, then slowly add magnesium sulfate raw materials to the solution, and then filter to obtain filter residue A (i.e. green gypsum) and filtrate A (i.e. magnesium nitrate) Solution), the filter residue A is washed to obtain green gypsum, and the filtrate A enters the circulation process. The steps of the circulation process are: 1) Preparation of magnesium hydroxide: add organic amine to the ...
Example Embodiment
[0037] Example 3
[0038] The raw materials used in the present invention are a. 1 part of calcium nitrate, which is 1 mol; b. 1 part of organic amine, which is n-hexylamine, which is 2.2 mol; c. 1 part of calcium oxide-containing raw materials, and the effective calcium oxide is determined before use The content is 1.5 mol; d. 2 parts of magnesium sulfate raw material, the content of magnesium sulfate is determined before use, and each part is 1 mol.
[0039] The start-up step of the process cycle of the present invention is to first formulate calcium nitrate into a 1.5mol / L solution, then slowly add magnesium sulfate raw materials into the solution, and then filter to obtain filter residue A (i.e. green gypsum) and filtrate A (i.e. magnesium nitrate) Solution), the filter residue A is washed to obtain green gypsum, and the filtrate A enters the circulation process. The steps of the circulation process are: 1) Preparation of magnesium hydroxide: add organic amine to the filtrate A...
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