CN106865581A - Phosphatic method is removed in a kind of reagent grade sodium nitrate - Google Patents
Phosphatic method is removed in a kind of reagent grade sodium nitrate Download PDFInfo
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- CN106865581A CN106865581A CN201510929013.1A CN201510929013A CN106865581A CN 106865581 A CN106865581 A CN 106865581A CN 201510929013 A CN201510929013 A CN 201510929013A CN 106865581 A CN106865581 A CN 106865581A
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- sodium nitrate
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Abstract
The invention provides phosphatic method is removed in a kind of reagent grade sodium nitrate, concretely comprise the following steps：(1) sodium nitrate heating is dissolved in pure water, all after dissolving, PH=2-3 is adjusted using a small amount of nitric acid；(2) add ferric nitrate that sodium hydroxide solution regulation PH=5-6 is added after all dissolving, stir 3-10min, precipitation is separated by filtration immediately, clear liquid heating is concentrated into proportion 1.4-1.45, stirs and be cooled to room temperature, and fractional crystallization, 100-105 DEG C of drying gets product；Methods described is easy to operate, and treatment effect stabilization, gained sodium nitrate meets SILVER REAGENT reagent standard, is with a wide range of applications.
Description
Technical field
The present invention relates to remove phosphate in a kind of impurity treatment technique, especially a kind of reagent grade sodium nitrate
Method.
Background technology
Sodium nitrate is one kind of inorganic salts, and chemical formula is NaNO3, white solid powder.Reagent grade sodium nitrate
Preparation in the past using industrial sodium nitrate purify prepare, do not control phosphatic index due to industrial sodium nitrate,
And reagent sodium nitrate is relatively stricter (phosphate≤0.0005%) to phosphate norm controlling, accordingly, it would be desirable to
Take efficient minimizing technology.Therefore, phosphatic method has in finding a kind of efficiently removal sodium nitrate
Very important production practices meaning.
The content of the invention
The technical problems to be solved by the invention are to provide remove in a kind of reagent grade sodium nitrate phosphatic
Method.
In order to solve the above technical problems, the technical scheme is that：
Phosphatic method is removed in a kind of reagent grade sodium nitrate, is concretely comprised the following steps：
(1) sodium nitrate heating is dissolved in pure water, all after dissolving, PH=2-3 is adjusted using a small amount of nitric acid；
(2) add ferric nitrate that sodium hydroxide solution regulation PH=5-6, stirring are added after all dissolving
3-10min, is separated by filtration precipitation immediately, and clear liquid heating is concentrated into proportion 1.4-1.45, and stirring is cooled to room
Temperature, fractional crystallization, 100-105 DEG C of drying gets product.
Preferably, phosphatic method is removed in mentioned reagent grade sodium nitrate, is concretely comprised the following steps：
(1) per 85kg, heating is dissolved in 100kg pure water sodium nitrate, all after dissolving, uses a small amount of nitre
Acid regulation PH=2-3；
(2) ferric nitrate 25g is added, all adds 10% sodium hydroxide solution to adjust PH=5-6 after dissolving,
Stirring 5min, is separated by filtration precipitation immediately, and clear liquid heating is concentrated into proportion 1.4-1.45, and stirring is cooled to
Room temperature, fractional crystallization, 100-105 DEG C of drying gets product.
The beneficial effects of the invention are as follows：
Phosphatic method is removed in mentioned reagent grade sodium nitrate, method is simple, easy to operate, treatment effect
Fruit stabilization, gained sodium nitrate meets SILVER REAGENT reagent standard, is with a wide range of applications.
Specific embodiment
Technical scheme of the present invention is further described with reference to specific embodiment.
Embodiment 1
Phosphatic method is removed in a kind of reagent grade sodium nitrate, is concretely comprised the following steps：
(1) sodium nitrate 85kg (phosphate content about 0.002%), heating is dissolved in 100kg pure water, entirely
After portion's dissolving, PH=2-3 is adjusted using a small amount of nitric acid；
(2) ferric nitrate 25g is added, all adds 10% sodium hydroxide solution to adjust PH=5-6 after dissolving,
Stirring 5min, is separated by filtration precipitation immediately, and clear liquid heating is concentrated into proportion 1.4-1.45, and stirring is cooled to
Room temperature, fractional crystallization, 100-105 DEG C of drying gets product.
Detection method：According to GB/T636-2011 method detect, phosphate 0.0001% (≤0.0005%),
Iron 0.00003% (≤0.0001%), meets quality index.
It is above-mentioned detailed to remove that phosphatic method carries out in a kind of reagent grade sodium nitrate with reference to embodiment
Description, be it is illustrative can include several embodiments according to limited scope rather than limited,
Therefore changing and modifications in the case where present general inventive concept is not departed from, should belong within protection scope of the present invention.
Claims (2)
1. phosphatic method is removed in a kind of reagent grade sodium nitrate, it is characterised in that：Concretely comprise the following steps：
(1) sodium nitrate heating is dissolved in pure water, all after dissolving, PH=2-3 is adjusted using a small amount of nitric acid；
(2) add ferric nitrate that sodium hydroxide solution regulation PH=5-6, stirring are added after all dissolving
3-10min, is separated by filtration precipitation immediately, and clear liquid heating is concentrated into proportion 1.4-1.45, and stirring is cooled to room
Temperature, fractional crystallization, 100-105 DEG C of drying gets product.
2. phosphatic method is removed in reagent grade sodium nitrate according to claim 1, its feature exists
In：Concretely comprise the following steps：
(1) per 85kg, heating is dissolved in 100kg pure water sodium nitrate, all after dissolving, uses a small amount of nitre
Acid regulation PH=2-3；
(2) ferric nitrate 25g is added, all adds 10% sodium hydroxide solution to adjust PH=5-6 after dissolving,
Stirring 5min, is separated by filtration precipitation immediately, and clear liquid heating is concentrated into proportion 1.4-1.45, and stirring is cooled to
Room temperature, fractional crystallization, 100-105 DEG C of drying gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929013.1A CN106865581A (en) | 2015-12-11 | 2015-12-11 | Phosphatic method is removed in a kind of reagent grade sodium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929013.1A CN106865581A (en) | 2015-12-11 | 2015-12-11 | Phosphatic method is removed in a kind of reagent grade sodium nitrate |
Publications (1)
| Publication Number | Publication Date |
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| CN106865581A true CN106865581A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510929013.1A Pending CN106865581A (en) | 2015-12-11 | 2015-12-11 | Phosphatic method is removed in a kind of reagent grade sodium nitrate |
Country Status (1)
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| CN (1) | CN106865581A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417433A (en) * | 2022-09-21 | 2022-12-02 | 成都市科隆化学品有限公司 | Method for producing high-purity sodium nitrate |
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2015
- 2015-12-11 CN CN201510929013.1A patent/CN106865581A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417433A (en) * | 2022-09-21 | 2022-12-02 | 成都市科隆化学品有限公司 | Method for producing high-purity sodium nitrate |
| CN115417433B (en) * | 2022-09-21 | 2024-04-12 | 成都市科隆化学品有限公司 | Method for producing high-purity sodium nitrate |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |