CN106745107A - A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate - Google Patents
A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate Download PDFInfo
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- CN106745107A CN106745107A CN201611058649.4A CN201611058649A CN106745107A CN 106745107 A CN106745107 A CN 106745107A CN 201611058649 A CN201611058649 A CN 201611058649A CN 106745107 A CN106745107 A CN 106745107A
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- Prior art keywords
- lime
- magnesium hydroxide
- magnesium
- purity
- calcium
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/22—Magnesium hydroxide from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/08—Preparation by double decomposition
- C01D9/12—Preparation by double decomposition with nitrates or magnesium, calcium, strontium, or barium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate, the process integration for preparing high pure nitric acid sodium and calcium sulfate whisker with the accessory substance calcium nitrate of production magnesium hydroxide by will produce high purity magnesium hydroxide technique is produced, and the calcium nitrate solution obtained by will produce magnesium hydroxide adds glauber salt（Sodium sulphate）Production calcium sulfate whisker is prepared, the mother liquid coming containing sodium nitrate for obtaining obtains high pure nitric acid sodium product by evaporation and concentration.Process characteristic：Use magnesium hydroxide products purity of the magnesium nitrate obtained by raw material production high, not the objectionable impurities such as chloride, good product performance is widely used；Gained sodium nitrate product purity is high, and impurity is few, can be widely used in the industries such as fused salt, glass and electronics；Process is simple, small investment, raw material availability is high, low production cost.
Description
Technical field
Present invention relates particularly to chemical products production technical field, and in particular to one kind production high purity magnesium hydroxide coproduction is high
The technique of pure sodium nitrate.
Background technology
It is raw material, the chloride in the magnesium hydroxide products of preparation that magnesium chloride is used existing magnesium hydroxide production technology more
Content is higher, have impact on the performance of product.The method that existing nitric acid process for producing sodium is mainly absorbed using nitric acid tail gas
Gained, the impurity content such as natrium nitrosum therein and chloride is higher, and product can not meet the industries such as fused salt, glass, electronics
Demand.
The content of the invention
It is of the invention there is provided one kind production high purity magnesium hydroxide co-producing high-purity nitric acid in order to solve the deficiencies in the prior art
The technique of sodium.
The present invention use technical solution be：A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate,
Comprise the following steps：
（1）Nitric acid and oxidation reactive magnesium are obtained into magnesium nitrate solution, the thick slag of lime and flocculant added in magnesium nitrate solution,
Reaction is filtered after a period of time, obtains refined magnesium nitrate solution；
（2）Lime and water are carried out into the milk of lime that lime slaking is obtained by mixing, the milk of lime for obtaining is added to lime milk extract
Refined lime breast is obtained in tank processed, after diluted settlement；
（3）Refined magnesium nitrate solution is added in precipitation reaction tank, while adding refined lime milk solution to be reacted, is obtained
Magnesium hydrate precipitate；
（4）Calcium nitrate reaction solution containing magnesium hydrate precipitate is transferred to carries out ageing reaction, the nitre of reaction in aging tank
Sour calcium solution overflow to mother liquid disposal tank, precipitation is filtrated to get magnesium hydroxide crude product；
（5）The thick slag of lime in adding milk of lime treatment tank in mother liquid disposal tank carries out nitric acid mother liquor of calcium refinement treatment, refines
In mother liquor overflow to milk of lime treatment tank.
（6）The magnesium hydroxide crude product that will be obtained is washed with water, and filtering, crushed after being dried obtains final product magnesium hydroxide products；
（7）By step（5）In add glauber salt in the nitric acid mother liquor of calcium that obtains, reaction obtains calcium sulfate precipitation and sodium nitrate is molten
Liquid；
（8）By being concentrated by evaporation, crystallisation by cooling, centrifuge washing, drying obtains high pure nitric acid sodium product to filtering gained sodium nitrate solution
Product.
Described step（7）In the calcium sulfate precipitation that obtains be filtrated to get calcium sulfate crystal whiskers crude product, then by washing, dry
Obtain calcium sulfate whiskers.
The beneficial effects of the invention are as follows：The invention provides a kind of work for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate
Skill, high pure nitric acid sodium and whisker are prepared by will produce high purity magnesium hydroxide technique with the accessory substance calcium nitrate of production magnesium hydroxide
The process integration production of calcium sulfate, the calcium nitrate solution obtained by will produce magnesium hydroxide adds glauber salt（Sodium sulphate）Prepare
Production calcium sulfate whisker, the mother liquid coming containing sodium nitrate for obtaining obtains high pure nitric acid sodium product by evaporation and concentration.Process characteristic：
Use magnesium hydroxide products purity of the magnesium nitrate obtained by raw material production high, not the objectionable impurities such as chloride, good product performance,
It is widely used；Gained sodium nitrate product purity is high, and impurity is few, can be widely used in the industries such as fused salt, glass and electronics；Technique letter
Single, small investment, raw material availability is high, low production cost.
Brief description of the drawings
Fig. 1 is present invention production high purity magnesium hydroxide process chart.
Fig. 2 is present invention production high pure nitric acid sodium process chart.
Specific embodiment
The present invention is further described in conjunction with Fig. 1, Fig. 2,
Production high purity magnesium hydroxide technique
Comprise the following steps：
（1）Nitric acid and oxidation reactive magnesium are obtained into magnesium nitrate solution, the thick slag of lime and flocculant added in magnesium nitrate solution,
Reaction is filtered after a period of time, obtains refined magnesium nitrate solution；
（2）Lime and water are carried out into the milk of lime that lime slaking is obtained by mixing, the milk of lime for obtaining is added to lime milk extract
Refined lime breast is obtained in tank processed, after diluted settlement；
（3）Refined magnesium nitrate solution is added in precipitation reaction tank, while adding refined lime milk solution to be reacted, is obtained
Magnesium hydrate precipitate；
（4）Calcium nitrate reaction solution containing magnesium hydrate precipitate is transferred to carries out ageing reaction, the nitre of reaction in aging tank
Sour calcium solution overflow to mother liquid disposal tank, precipitation is filtrated to get magnesium hydroxide crude product.
Production high pure nitric acid sodium technique
（5）The thick slag of lime in adding milk of lime treatment tank in mother liquid disposal tank carries out nitric acid mother liquor of calcium refinement treatment, refines
In mother liquor overflow to milk of lime treatment tank.
（6）The magnesium hydroxide crude product that will be obtained is washed with water, and filtering, crushed after being dried obtains final product magnesium hydroxide products；
（7）By step（5）In add glauber salt in the nitric acid mother liquor of calcium that obtains, reaction obtains calcium sulfate precipitation and sodium nitrate is molten
Liquid；
（8）By being concentrated by evaporation, crystallisation by cooling, centrifuge washing, drying obtains high pure nitric acid sodium product to filtering gained sodium nitrate solution
Product.
Production calcium sulfate crystal whiskers technique
By step（7）In the calcium sulfate precipitation that obtains be filtrated to get calcium sulfate crystal whiskers crude product, then by washing, being dried to obtain sulfuric acid
Calcium pyroborate product.
The present invention will be high with the accessory substance calcium nitrate preparation of production magnesium hydroxide by that will produce high purity magnesium hydroxide technique
The process integration production of pure sodium nitrate and calcium sulfate whisker, the calcium nitrate solution obtained by will produce magnesium hydroxide adds unit bright
Powder（Sodium sulphate）Production calcium sulfate whisker is prepared, the mother liquid coming containing sodium nitrate for obtaining obtains high pure nitric acid sodium by evaporation and concentration
Product.Process characteristic：Use that magnesium hydroxide products purity of the magnesium nitrate obtained by raw material production is high, chloride etc. is not harmful miscellaneous
Matter, good product performance is widely used；Gained sodium nitrate product purity is high, and impurity is few, can be widely used in fused salt, glass and electricity
The industries such as son；Process is simple, small investment, raw material availability is high, low production cost.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate, it is characterised in that comprise the following steps：
（1）Nitric acid and oxidation reactive magnesium are obtained into magnesium nitrate solution, the thick slag of lime and flocculant added in magnesium nitrate solution,
Reaction is filtered after a period of time, obtains refined magnesium nitrate solution；
（2）Lime and water are carried out into the milk of lime that lime slaking is obtained by mixing, the milk of lime for obtaining is added to lime milk extract
Refined lime breast is obtained in tank processed, after diluted settlement；
（3）Refined magnesium nitrate solution is added in precipitation reaction tank, while adding refined lime milk solution to be reacted, is obtained
Magnesium hydrate precipitate；
（4）Calcium nitrate reaction solution containing magnesium hydrate precipitate is transferred to carries out ageing reaction, the nitre of reaction in aging tank
Sour calcium solution overflow to mother liquid disposal tank, precipitation is filtrated to get magnesium hydroxide crude product；
（5）The thick slag of lime in adding milk of lime treatment tank in mother liquid disposal tank carries out nitric acid mother liquor of calcium refinement treatment, refines
In mother liquor overflow to milk of lime treatment tank；
（6）The magnesium hydroxide crude product that will be obtained is washed with water, and filtering, crushed after being dried obtains final product magnesium hydroxide products；
（7）By step（5）In add glauber salt in the nitric acid mother liquor of calcium that obtains, reaction obtains calcium sulfate precipitation and sodium nitrate is molten
Liquid；
（8）By being concentrated by evaporation, crystallisation by cooling, centrifuge washing, drying obtains high pure nitric acid sodium product to filtering gained sodium nitrate solution
Product.
2. a kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate according to claim 1, it is characterised in that
Described step（7）In the calcium sulfate precipitation that obtains be filtrated to get calcium sulfate crystal whiskers crude product, then by washing, being dried to obtain sulfuric acid
Calcium pyroborate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058649.4A CN106745107A (en) | 2016-11-28 | 2016-11-28 | A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058649.4A CN106745107A (en) | 2016-11-28 | 2016-11-28 | A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate |
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| Publication Number | Publication Date |
|---|---|
| CN106745107A true CN106745107A (en) | 2017-05-31 |
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|---|---|---|---|
| CN201611058649.4A Pending CN106745107A (en) | 2016-11-28 | 2016-11-28 | A kind of technique for producing high purity magnesium hydroxide co-producing high-purity sodium nitrate |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
-
2016
- 2016-11-28 CN CN201611058649.4A patent/CN106745107A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549876A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Method for producing boric acid and co-produce magnesium hydrate and calcium sulphate by utilizing boron-rich slag |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |