CN101597045A - The method for preparing tripoly phosphate sodium STPP with composite phosphate dry powder - Google Patents
The method for preparing tripoly phosphate sodium STPP with composite phosphate dry powder Download PDFInfo
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- CN101597045A CN101597045A CNA2009101026559A CN200910102655A CN101597045A CN 101597045 A CN101597045 A CN 101597045A CN A2009101026559 A CNA2009101026559 A CN A2009101026559A CN 200910102655 A CN200910102655 A CN 200910102655A CN 101597045 A CN101597045 A CN 101597045A
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- dry powder
- sodium stpp
- feed liquid
- tripoly phosphate
- composite phosphate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
A kind of method for preparing tripoly phosphate sodium STPP with composite phosphate dry powder, relate to the method for preparing tripoly phosphate sodium STPP, this method is to be that 5: 3 proportional meter is calculated the mole number for the required sodium oxide of composite phosphate dry powder of unit mass according to sodium oxide and Vanadium Pentoxide in FLAKES mol ratio earlier, the alkali lye that will contain the mole number of required sodium oxide is then directly allocated composite phosphate dry powder in the tempering tank of belt stirrer, make it hybrid reaction under stirring, utilize reaction heat that dry powder is dissolved fully and obtain feed liquid, again feed liquid is sprayed into directly that the dehydration polycondensation becomes tripoly phosphate sodium STPP in the polymerization furnace; Or feed liquid made siccative in spray-drying tower, enter polymerization furnace dehydration polycondensation again and become tripoly phosphate sodium STPP.Method of the present invention has the following advantages: the one, and science, reasonable is operated brief; The 2nd, energy-conservation, water saving; The 3rd, to compare with the production equipment of scale, present method is because polymerization time shortens, and actual throughput improves relatively.Be applicable to relevant phosphorous chemical industry enterprise.
Description
Technical field
The present invention relates to alkali metal phosphate, furthermore, relate to the method for preparing tripoly phosphate sodium STPP, specifically, relate to the method for preparing tripoly phosphate sodium STPP with composite phosphate.
Background technology
The traditional method of preparation tripoly phosphate sodium STPP is that the neutralizer that obtains is made siccative in spray-drying tower under 80 ℃ with soda ash suspension neutralising phosphoric acid, enters the polycondensation of dewatering in the polymerization furnace and becomes tripoly phosphate sodium STPP; Or neutralizer is directly entered polymerization furnace dehydration polycondensation become tripoly phosphate sodium STPP.The mol ratio of this processing requirement sodium oxide and Vanadium Pentoxide in FLAKES is 5: 3, and requires the solid content of feed liquid to reach 40%～50%, and solution temperature remains on about 80 ℃, and this just needs to consume steam.Generally, produce the 1t tripoly phosphate sodium STPP and need consume 0.7t steam, be converted into energy consumption, only this item 2200MJ that promptly need consume energy.
Producing with the peroxophosphoric acid acidifying sodium formate in the technology of formic acid, can produce by product composite phosphate dry powder, this technology is documented in the Chinese patent application part No. 200710078073.2 in " the multiple phosphatic method of concentration formic acid and high coproduction is produced in serialization ".The composition of composite phosphate about 45% is an orthophosphoric acid salt, and about 55% is acid salt such as pyrophosphate salt and poly-phosphate, and the mol ratio of its sodium oxide and Vanadium Pentoxide in FLAKES is less than 1.667.In order to fully utilize this composite phosphate, normally with its dry powder wiring solution-forming and heating hydrolysis, make acid salt wherein be converted into orthophosphoric acid salt by hydrolysis, add alkali lye again, the mol ratio for the treatment of sodium oxide and Vanadium Pentoxide in FLAKES reaches 1.667 post polymerization becomes the tripoly phosphate sodium STPP product.The technology of this after drying of dissolving earlier need consume 0.7t steam equally, and technology is consuming time also many, and is obviously unreasonable.
If without aforesaid method, existing technology only has patent No. 200410040357.9, and " using the method that wet synthetic method is produced tripoly phosphate sodium STPP of doing " is to adopt liquid extraction and the comprehensive also method of usefulness of dry method roasting respectively, with a spot of phosphoric acid and soda ash respectively with ground phosphate rock and saltcake reaction, be rich in P for " neutralization-polymerization " production tripoly phosphate sodium STPP and phosphoric acid salt product provide
2O
5Phosphoric acid extract and soda ash leaching liquid.But this method is not suitable for composite phosphate prepares tripoly phosphate sodium STPP.
Up to now, the method for preparing tripoly phosphate sodium STPP with composite phosphate is not appeared in the newspapers.
Summary of the invention
The purpose of this invention is to provide and a kind ofly prepare the method for tripoly phosphate sodium STPP with composite phosphate dry powder, the prior art power consumption is high to overcome, the defective of length consuming time.
The contriver is through inquiring into repeatedly, study and testing, and the method that provides is:
Be that 5: 3 proportional meter is calculated the alkali lye for the mole number of the required sodium oxide of composite phosphate dry powder of unit mass earlier according to sodium oxide and Vanadium Pentoxide in FLAKES mol ratio, the alkali lye that will contain the mole number of required sodium oxide is then directly allocated composite phosphate dry powder in the tempering tank of belt stirrer, make it hybrid reaction under stirring, utilize reaction heat that dry powder is dissolved fully and obtain feed liquid, again feed liquid is sprayed into directly that the dehydration polycondensation becomes tripoly phosphate sodium STPP in the polymerization furnace; Or feed liquid made siccative in spray-drying tower, enter polymerization furnace dehydration polycondensation again and become tripoly phosphate sodium STPP.
Alkali lye described in the said process is the solution of caustic soda or soda ash, and its massfraction is 5%～45%; Described caustic soda is the caustic soda of ionic membrane method or diaphragm process or causticizing process production.
The temperature of above-mentioned alkali lye and composite phosphate dry powder blend is any temperature below normal temperature or the normal temperature to 80 ℃.
Agitator speed in the above-mentioned tempering tank is 40～120r/min; The stirring reaction time is 5～60min, and promptly the alkali lye massfraction is high more, and the reaction times is short more; Otherwise the time is long more.
It is any temperature below normal temperature or the normal temperature to 80 ℃ that above-mentioned feed liquid enters temperature before the polymerization furnace.
The temperature of above-mentioned polymerization process is 360 ℃～430 ℃, and polymerization time is 15～20min.
The contriver points out that the method for regulating sodium oxide and Vanadium Pentoxide in FLAKES mol ratio is: be lower than 1.667 as ratio, can add alkali lye; As be higher than 1.667, then can add composite phosphate dry powder.
Method of the present invention has the following advantages: the one, and science, reasonable need not just can prepare tripoly phosphate sodium STPP with composite phosphate dry powder heating hydrolysis, operates brief; The 2nd, energy-conservation, water saving is according to measuring and calculating, because can be made into the feed liquid of solid content＞50%, every production 1t tripoly phosphate sodium STPP, adopt present method can reduce the about 2930MJ of energy consumption altogether,, can save 10,000 t mark coal every year as to produce 100,000 t tripoly phosphate sodium STPPs every year than traditional method; The 3rd, to compare with the production equipment of scale, present method is because polymerization time shortens, and actual throughput improves relatively.Be applicable to relevant phosphorous chemical industry enterprise.
Embodiment
Embodiment 1 takes the by-product composite phosphate dry powder 100kg that the peroxophosphoric acid acidifying sodium formate is produced formic acid, according to sodium oxide and Vanadium Pentoxide in FLAKES mol ratio is the mole number that 5: 3 proportional meter is calculated required sodium oxide, conversion is 20% caustic soda soln, in the tempering tank of belt stirrer, allocate composite phosphate dry powder under the normal temperature into, make it hybrid reaction 30min under 80r/min stirs, utilize reaction heat that dry powder is dissolved fully and obtain about 60 ℃ feed liquid; Again this feed liquid is directly sprayed in the polymerization furnace and make the tripoly phosphate sodium STPP product in the about 400 ℃ polycondensation 20min that dewater down.Quality product meets the GB/T9983-2004 standard.
Embodiment 2 takes the by-product composite phosphate dry powder 50kg that the peroxophosphoric acid acidifying sodium formate is produced formic acid, according to sodium oxide and Vanadium Pentoxide in FLAKES mol ratio is the mole number that 5: 3 proportional meter is calculated required sodium oxide, conversion is 30% soda ash solution, in the tempering tank at belt stirrer under 40 ℃, allocate this alkali lye into composite phosphate dry powder, 80r/min makes it hybrid reaction 25min under stirring, dry powder is dissolved fully, be heated into 80 ℃ feed liquid; Feed liquid is made siccative in spray-drying tower, enter polymerization furnace again and make the tripoly phosphate sodium STPP product in the about 400 ℃ polycondensation 20min that dewater down.Quality product meets the GB/T9983-2004 standard.
Claims (6)
1 one kinds of methods that prepare tripoly phosphate sodium STPP with composite phosphate dry powder, it is characterized in that this method is is that 5: 3 proportional meter is calculated the mole number for the required sodium oxide of composite phosphate dry powder of unit mass according to sodium oxide and Vanadium Pentoxide in FLAKES mol ratio earlier, the alkali lye that will contain the mole number of required sodium oxide is then directly allocated composite phosphate dry powder in the tempering tank of belt stirrer, make it hybrid reaction under stirring, utilize reaction heat that dry powder is dissolved fully and obtain feed liquid, again feed liquid is sprayed into directly that the dehydration polycondensation becomes tripoly phosphate sodium STPP in the polymerization furnace; Or feed liquid made siccative in spray-drying tower, enter polymerization furnace dehydration polycondensation again and become tripoly phosphate sodium STPP.
2 the method for claim 1 is characterized in that described alkali lye is the solution of caustic soda or soda ash, and its massfraction is 5%～45%; Described caustic soda is the caustic soda of ionic membrane method or diaphragm process or causticizing process production.
3 the method for claim 1, the temperature that it is characterized in that described alkali lye and composite phosphate dry powder blend are any temperature below normal temperature or the normal temperature to 80 ℃.
4 the method for claim 1 is characterized in that the agitator speed in the described tempering tank is 40～120r/min; The stirring reaction time is 5～60min.
5 the method for claim 1 is characterized in that it is any temperature below normal temperature or the normal temperature to 80 ℃ that described feed liquid enters temperature before the polymerization furnace.
6 the method for claim 1, the temperature that it is characterized in that described polymerization process are 360 ℃～430 ℃, and polymerization time is 15～20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101026559A CN101597045B (en) | 2009-07-03 | 2009-07-03 | Method for preparing trimeric sodium phosphate by composite phosphate dry powder |
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| CN2009101026559A CN101597045B (en) | 2009-07-03 | 2009-07-03 | Method for preparing trimeric sodium phosphate by composite phosphate dry powder |
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| CN101597045A true CN101597045A (en) | 2009-12-09 |
| CN101597045B CN101597045B (en) | 2011-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583294A (en) * | 2012-03-12 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
| CN103569981A (en) * | 2012-08-02 | 2014-02-12 | 浙江新安化工集团股份有限公司 | Method for producing orthophosphate products from polyphosphates through hydrolysis |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4536377A (en) * | 1982-05-10 | 1985-08-20 | Fmc Corporation | Process for making sodium tripolyphosphate |
| DE3808732A1 (en) * | 1988-03-16 | 1989-10-05 | Hoechst Ag | METHOD FOR PRODUCING SODIUM TRIPOLYPHOSPHATE |
| CN100336718C (en) * | 2005-05-09 | 2007-09-12 | 四川省犍为明丰化工有限公司 | Method for producing sodium tripolyphosphate by mirabilite double decomposition method |
| CN100480227C (en) * | 2007-12-28 | 2009-04-22 | 贵州青利集团有限公司 | Continuous co-production method for high concentration formic acid and high pure sodium hexametaphosphate |
| CN101462710A (en) * | 2008-11-28 | 2009-06-24 | 湖北兴发化工集团股份有限公司 | Method for producing sodium tripolyphosphate with by-product ammonium chloride |
-
2009
- 2009-07-03 CN CN2009101026559A patent/CN101597045B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583294A (en) * | 2012-03-12 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
| CN103569981A (en) * | 2012-08-02 | 2014-02-12 | 浙江新安化工集团股份有限公司 | Method for producing orthophosphate products from polyphosphates through hydrolysis |
| CN103569981B (en) * | 2012-08-02 | 2018-08-31 | 浙江新安化工集团股份有限公司 | A method of hydrolyzing production orthophosphates product with condensed phosphate |
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