CN102583294A - Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst - Google Patents
Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst Download PDFInfo
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- CN102583294A CN102583294A CN2012100632197A CN201210063219A CN102583294A CN 102583294 A CN102583294 A CN 102583294A CN 2012100632197 A CN2012100632197 A CN 2012100632197A CN 201210063219 A CN201210063219 A CN 201210063219A CN 102583294 A CN102583294 A CN 102583294A
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- neutralization
- nitrate
- ammonium nitrate
- tripoly phosphate
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Abstract
The invention discloses a method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst. The method comprises the steps as follows: adding soda and wet process phosphoric acid are in a neutralization agitation tank for neutralization reaction, adding sodium nitrate in the product according to the proportion that 4 to 5 kg of sodium nitrate added in one ton of sodium tripolyphosphate after the neutralization reaction is largely over, boiling for 15 to 20 min to produce sodium orthophosphate neutralization liquid, pumping the sodium orthophosphate neutralization liquid into a neutralization liquid storage tank, and finally pumping the neutralization liquid into a polymerization furnace by a high pressure pump to synthesize sodium tripolyphosphate. The pH value of the neutralization reaction is controlled to be 6.5 to 7.0, the Baume density of neutralization slurry is controlled to be 54 to 56 Degree Baum'e, and the relative density is 1.50 to 1.60. After the method provided by the invention is adopted, the cost for transportation and safety management of nitramine (hazardous chemical substance) can be reduced; and when nitramine is replaced by sodium nitrate, Na<+> ion in Na NO3 can be fully utilized, and the consumption of soda can be reduced, so that the manufacturing cost can be lowered.
Description
Technical field
The present invention relates to phosphatic working method, be specifically related to a kind of method of producing catalyzer as tripoly phosphate sodium STPP with SODIUMNITRATE replacement an ammonium nitrate.
Background technology
Tripoly phosphate sodium STPP (Na
5P
3O
10) branch of I type and II type is arranged, industrial tripoly phosphate sodium STPP is actually the mixture of I type and II type.I type dissolution rate is fast, and heat effect is big when hydration generates hexahydrate, in atmosphere, is prone to moisture absorption caking.The II type moisture absorption is slower, prevented from caking.Add the catalyzer that an ammonium nitrate is produced as tripoly phosphate sodium STPP, can accelerate the production rate of tripoly phosphate sodium STPP, can make the I type be converted into the II type simultaneously, reduce I type content.But an ammonium nitrate belongs to the dangerization article, and its transportation, storage and use all must be taked corresponding safe precaution measure, have increased production cost.
Summary of the invention
The purpose of this invention is to provide a kind of method, through the catalyzer that uses SODIUMNITRATE to replace ammonium nitrate to produce, to reduce ammonium nitrate (dangerization article) transportation and security control cost as industrial tripoly phosphate sodium STPP.
Technical scheme of the present invention is: a kind of method that replaces an ammonium nitrate to produce catalyzer as tripoly phosphate sodium STPP with SODIUMNITRATE comprises the steps:
To in steel basin in add soda ash and phosphoric acid by wet process carries out neutralization reaction; When in when this end of reactive group; The product of pressing tripoly phosphate sodium STPP per ton adds the SODIUMNITRATE of 4-5kg, boils 15～20min, makes ortho-phosphoric acid sodium salt neutralizer; And pump in the neutralizer storage tank, at last neutralizer is pumped into synthetic tripoly phosphate sodium STPP in the polymerization furnace through HPP.
The pH value of above-mentioned neutralization reaction is controlled at 6.5～7.0; In and the slip degree Beaume be controlled between 54～56 ° of B é, specific density is 1.50～1.60.
The invention has the beneficial effects as follows:, can reduce ammonium nitrate (dangerization article) transportation and security control cost through the catalyzer that uses SODIUMNITRATE to replace ammonium nitrate to produce as industrial tripoly phosphate sodium STPP; Use SODIUMNITRATE to replace ammonium nitrate can also make full use of NaNO
3In the Na+ ion, can reduce the soda ash usage quantity, thereby reduce production costs.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment
Certain factory only uses ammonium nitrate as the catalyzer supplement production in April, 2011; When 2931.17 tons of monthly outputs; With 8.16 tons of ammonium nitrates, 2478.63 yuan/ton of ammonium nitrate unit prices (not containing tax), actual use cost is 8.16 ÷, 2931.17 * 2478.63=6.90 unit/ton tripoly phosphate sodium STPP;
Take method of the present invention in October, 2011; Only use SODIUMNITRATE as the catalyzer supplement production; When 2748.675 tons of monthly outputs, with 11.3 tons in SODIUMNITRATE, 2965.81 yuan/ton of SODIUMNITRATE unit prices (not containing tax); Use cost is 11.3 ÷, 2748.675 * 2965.81=12.19 unit/ton tripoly phosphate sodium STPP; 11.3 ton SODIUMNITRATE can reduce the usage quantity of 11.3 * 106 * 98% ÷ (85 * 98%)=14.09 ton soda ash, then uses SODIUMNITRATE 14.09 ÷, 2748.675 * 1725.05=8.84 unit/ton tripoly phosphate sodium STPP that can reduce cost October, reality interpolation SODIUMNITRATE cost should be: 12.19-8.84=3.35 unit/ton tripoly phosphate sodium STPP;
Can find out the catalyzer that uses SODIUMNITRATE to replace ammonium nitrate to produce as industrial five sodium from above, producing that five sodium per ton can reduce production costs is 6.90-3.35=3.55 unit.
Claims (2)
1. the method that replaces an ammonium nitrate to produce catalyzer as tripoly phosphate sodium STPP with SODIUMNITRATE is characterized in that it comprises the steps:
To in steel basin in add soda ash and phosphoric acid by wet process carries out neutralization reaction; When in when this end of reactive group; The product of pressing tripoly phosphate sodium STPP per ton adds the SODIUMNITRATE of 4-5kg, boils 15～20min, makes ortho-phosphoric acid sodium salt neutralizer; And pump in the neutralizer storage tank, at last neutralizer is pumped into synthetic tripoly phosphate sodium STPP in the polymerization furnace through HPP.
2. the method that SODIUMNITRATE according to claim 1 replaces an ammonium nitrate to produce catalyzer as tripoly phosphate sodium STPP is characterized in that the pH value of said neutralization reaction is controlled at 6.5～7.0; In and the slip degree Beaume be controlled between 54～56 ° of B é, specific density is 1.50～1.60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100632197A CN102583294A (en) | 2012-03-12 | 2012-03-12 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
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| CN2012100632197A CN102583294A (en) | 2012-03-12 | 2012-03-12 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
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| CN102583294A true CN102583294A (en) | 2012-07-18 |
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| CN2012100632197A Pending CN102583294A (en) | 2012-03-12 | 2012-03-12 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466586A (en) * | 2013-09-26 | 2013-12-25 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by taking mixture of sodium nitrate and ammonium nitrate as catalyst |
| CN104843662A (en) * | 2015-04-15 | 2015-08-19 | 绵阳市神龙饲料有限公司 | Preparation method for phosphoric acid sodium salts |
| CN105197908A (en) * | 2015-09-15 | 2015-12-30 | 湖北兴发化工集团股份有限公司 | Production method of sodium tripolyphosphate with high solubility |
| CN105329871A (en) * | 2015-11-02 | 2016-02-17 | 湖北兴发化工集团股份有限公司 | Production method of quick-dissolving type sodium hexametaphosphate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597045A (en) * | 2009-07-03 | 2009-12-09 | 贵州青利集团股份有限公司 | The method for preparing tripoly phosphate sodium STPP with composite phosphate dry powder |
| CN101920949A (en) * | 2010-09-19 | 2010-12-22 | 湖北兴发化工集团股份有限公司 | Method for producing nitrate/nitrite-free sodium tripolyphosphate |
-
2012
- 2012-03-12 CN CN2012100632197A patent/CN102583294A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597045A (en) * | 2009-07-03 | 2009-12-09 | 贵州青利集团股份有限公司 | The method for preparing tripoly phosphate sodium STPP with composite phosphate dry powder |
| CN101920949A (en) * | 2010-09-19 | 2010-12-22 | 湖北兴发化工集团股份有限公司 | Method for producing nitrate/nitrite-free sodium tripolyphosphate |
Non-Patent Citations (2)
| Title |
|---|
| 陈继善: "中国三聚磷酸钠生产现状及发展对策", 《无机盐工业》 * |
| 黄艳芹: "三聚磷酸钠生产工艺控制探讨", 《河南职技师院学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466586A (en) * | 2013-09-26 | 2013-12-25 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by taking mixture of sodium nitrate and ammonium nitrate as catalyst |
| CN104843662A (en) * | 2015-04-15 | 2015-08-19 | 绵阳市神龙饲料有限公司 | Preparation method for phosphoric acid sodium salts |
| CN104843662B (en) * | 2015-04-15 | 2018-02-23 | 绵阳市神龙重科实业有限公司 | A kind of preparation method of sodium ascorbyl phosphate |
| CN105197908A (en) * | 2015-09-15 | 2015-12-30 | 湖北兴发化工集团股份有限公司 | Production method of sodium tripolyphosphate with high solubility |
| CN105197908B (en) * | 2015-09-15 | 2017-11-07 | 湖北兴发化工集团股份有限公司 | A kind of production method of high-dissolvability sodium tripolyphosphate |
| CN105329871A (en) * | 2015-11-02 | 2016-02-17 | 湖北兴发化工集团股份有限公司 | Production method of quick-dissolving type sodium hexametaphosphate |
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Application publication date: 20120718 |