CN105314658A - Preparation method of guaranteed-reagent sodium nitrate - Google Patents
Preparation method of guaranteed-reagent sodium nitrate Download PDFInfo
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- CN105314658A CN105314658A CN201410292701.7A CN201410292701A CN105314658A CN 105314658 A CN105314658 A CN 105314658A CN 201410292701 A CN201410292701 A CN 201410292701A CN 105314658 A CN105314658 A CN 105314658A
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- sodium nitrate
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Abstract
The invention relates to a preparation method of guaranteed-reagent sodium nitrate, which includes the following steps: 1) purification and impurity removal of industrial sodium nitrate: placing the industrial sodium nitrate in a glass beaker, adding distilled water, heating the solution on an electric stove at 80 DEG C to dissolve the industrial sodium nitrate, adding a saturated sodium carbonate solution to regulate the pH to 7.5 with continuous stirring to generate less quantity of white precipitate, allowing the solution to stand for 3 h, and filtering the solution to obtain a solution A; 2) concentrating crystallization and re-crystallization to obtain the guaranteed-reagent sodium nitrate: concentrating the solution A at 180 DEG C to separate out crystal, cooling and spin-drying the crystal, performing re-crystallization, spin-drying the crystal, and drying the crystal in an electric dry oven at 80 DEG C for 4 h to obtain the guaranteed-reagent sodium nitrate. In the method, the industrial sodium nitrate is added with the pure water and then is heated to dissolve. The solution then is regulated to be weak-alkaline with the sodium carbonate solution. Impurity removal and precipitation, filtration and re-crystallization are then carried out to prepare the guaranteed-reagent sodium nitrate.
Description
Technical field
The invention belongs to mineral compound preparation method, relate to the preparation method of the pure SODIUMNITRATE of a kind of top grade.
Background technology
The pure SODIUMNITRATE of top grade is widely used in glass dyestuff, pigment etc., and current preparation method is double decomposition, by the SODIUMNITRATE that the calcium nitrate filtrate of 50 ~ 52% and sodium sulfate obtain.The pure foreign matter content of SODIUMNITRATE top grade of this production is high, can only be used for gunpowder, explosive, pyrotechnics etc., can not meet the demand of conglomerate.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part.The preparation method of the pure SODIUMNITRATE of top grade providing a kind of foreign matter content low-purity high.
The object technical scheme that the present invention realizes is:
A preparation method for the pure SODIUMNITRATE of top grade, method is as follows:
(1) the purification of industrial sodium nitrate, the removal of impurity
Industrial sodium nitrate is put into glass beaker, adds distilled water, electric furnace heats, heat 80 DEG C and make it dissolve, then add saturated sodium carbonate solution and adjust pH=7.5, and constantly stir, occur a small amount of white precipitate, leave standstill 3 hours, filter, obtain solution A;
(2) condensing crystal, then recrystallization obtains the pure SODIUMNITRATE of top grade
Solution A step (1) obtained concentrates, 180 DEG C, and crystallization cools, and dry, then recrystallization once, crystallization is dried, and moves into electric oven 80 DEG C, dry 4 hours, obtains the pure SODIUMNITRATE of top grade.
And described step is middle SODIUMNITRATE (1): distilled water: the weight ratio of sodium carbonate is 1:2:0.005-0.01.
Advantage of the present invention and beneficial effect are:
1, the preparation method related to of the present invention is industrial sodium nitrate, adds pure water, heating for dissolving, is adjusted to weakly alkaline with sodium carbonate filtrate, and the removal of impurity precipitates, and filter, recrystallization, finally obtains the pure SODIUMNITRATE of top grade.
2, this method processing step prepared is simple, and operation steps easily controls, and Technology is advanced, and production efficiency is high, and obtained product top grade pure SODIUMNITRATE purity is high, and foreign matter content is low, and obtained SODIUMNITRATE meets the needs of conglomerate high-end technology.
Embodiment
Be further described below in conjunction with embodiment, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Embodiment 1:
A preparation method for the pure SODIUMNITRATE of top grade, method is as follows:
(1) the purification of industrial sodium nitrate, the removal of impurity
1.0Kg industrial sodium nitrate is put into glass beaker, adds distilled water 2000 milliliters, electric furnace heats, heat 80 DEG C and make it dissolve, then add 5 milliliters of saturated sodium carbonate solutions and adjust PH=7.5, and constantly stir, occur a small amount of white precipitate, leave standstill 3 hours, filter, obtain solution A.
(2) condensing crystal, then recrystallization obtains the pure SODIUMNITRATE of top grade
Solution A step (1) obtained concentrates, 180 DEG C, and crystallization cools, and dry, then recrystallization once, crystallization is dried, and moves into electric oven 80 DEG C, dry 4 hours, obtains the pure SODIUMNITRATE of top grade.
Step (1) in, SODIUMNITRATE: distilled water: the weight ratio of sodium carbonate is 1:2-3:0.005.
Embodiment 2
A preparation method for the pure SODIUMNITRATE of top grade, method is as follows:
(1) the purification of industrial sodium nitrate, the removal of impurity.
1.5Kg industrial sodium nitrate is put into glass beaker, add distilled water 4000 milliliters, electric furnace heats, heating 85 DEG C makes it dissolve, and then adds 7.5 milliliters of saturated sodium carbonate solution leveling pH=7.8, and constantly stirs, there is a small amount of white precipitate, leave standstill 3.5 hours, filter, obtain solution A;
(2) condensing crystal, then recrystallization obtains the pure SODIUMNITRATE of top grade
Solution A step (1) obtained concentrates, 90 DEG C, and crystallization cools, and dry, then recrystallization once, crystallization is dried, and moves into electric oven 75 DEG C, dry 5 hours, obtains the pure SODIUMNITRATE of top grade.
Claims (2)
1. a preparation method for the pure SODIUMNITRATE of top grade, is characterized in that: method is as follows:
(1) the purification of industrial sodium nitrate, the removal of impurity
Industrial sodium nitrate is put into glass beaker, adds distilled water, electric furnace heats, heat 80 DEG C and make it dissolve, then add saturated sodium carbonate solution and adjust pH=7.5, and constantly stir, occur a small amount of white precipitate, leave standstill 3 hours, filter, obtain solution A;
(2) condensing crystal, then recrystallization obtains the pure SODIUMNITRATE of top grade
Solution A step (1) obtained concentrates, 180 DEG C, and crystallization cools, and dry, then recrystallization once, crystallization is dried, and moves into electric oven 80 DEG C, dry 4 hours, obtains the pure SODIUMNITRATE of top grade.
2. the preparation method of the pure SODIUMNITRATE of top grade according to claim 1, is characterized in that: described step is middle SODIUMNITRATE (1): distilled water: the weight ratio of sodium carbonate is 1:2:0.005-0.01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292701.7A CN105314658A (en) | 2014-06-25 | 2014-06-25 | Preparation method of guaranteed-reagent sodium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410292701.7A CN105314658A (en) | 2014-06-25 | 2014-06-25 | Preparation method of guaranteed-reagent sodium nitrate |
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| Publication Number | Publication Date |
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| CN105314658A true CN105314658A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410292701.7A Pending CN105314658A (en) | 2014-06-25 | 2014-06-25 | Preparation method of guaranteed-reagent sodium nitrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107673375A (en) * | 2017-10-27 | 2018-02-09 | 安徽胜达化工科技有限公司 | A kind of method of purification of potassium nitrate |
| CN110255586A (en) * | 2019-06-17 | 2019-09-20 | 青海联大化工科技有限公司 | The method that accurate control separation sodium nitrite, sodium chloride produce fused salt grade sodium nitrate |
-
2014
- 2014-06-25 CN CN201410292701.7A patent/CN105314658A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107673375A (en) * | 2017-10-27 | 2018-02-09 | 安徽胜达化工科技有限公司 | A kind of method of purification of potassium nitrate |
| CN110255586A (en) * | 2019-06-17 | 2019-09-20 | 青海联大化工科技有限公司 | The method that accurate control separation sodium nitrite, sodium chloride produce fused salt grade sodium nitrate |
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Application publication date: 20160210 |
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| WD01 | Invention patent application deemed withdrawn after publication |