CN114804050A - Production process of anhydrous trisodium pyrophosphate - Google Patents
Production process of anhydrous trisodium pyrophosphate Download PDFInfo
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- CN114804050A CN114804050A CN202210595453.8A CN202210595453A CN114804050A CN 114804050 A CN114804050 A CN 114804050A CN 202210595453 A CN202210595453 A CN 202210595453A CN 114804050 A CN114804050 A CN 114804050A
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- MLIKYFGFHUYZAL-UHFFFAOYSA-K trisodium;hydron;phosphonato phosphate Chemical compound [Na+].[Na+].[Na+].OP([O-])(=O)OP([O-])([O-])=O MLIKYFGFHUYZAL-UHFFFAOYSA-K 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 46
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 37
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 23
- 235000013305 food Nutrition 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 6
- 239000011734 sodium Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 51
- 239000002253 acid Substances 0.000 claims description 47
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 25
- 239000000047 product Substances 0.000 claims description 20
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 15
- 238000010669 acid-base reaction Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 15
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 14
- 230000023556 desulfurization Effects 0.000 claims description 14
- 229910052785 arsenic Inorganic materials 0.000 claims description 12
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010924 continuous production Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 235000013373 food additive Nutrition 0.000 description 3
- 239000002778 food additive Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 3
- 229940048086 sodium pyrophosphate Drugs 0.000 description 3
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 2
- 235000011180 diphosphates Nutrition 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229940048084 pyrophosphate Drugs 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019820 disodium diphosphate Nutrition 0.000 description 1
- GYQBBRRVRKFJRG-UHFFFAOYSA-L disodium pyrophosphate Chemical compound [Na+].[Na+].OP([O-])(=O)OP(O)([O-])=O GYQBBRRVRKFJRG-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000013355 food flavoring agent Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/42—Pyrophosphates
- C01B25/425—Pyrophosphates of alkali metals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
The invention discloses a production process of anhydrous trisodium pyrophosphate, which comprises the steps of firstly preparing food phosphoric acid by reacting sodium hydroxide with sodium sulfide, feeding the sodium hydroxide, the food phosphoric acid, a stabilizer and a defoaming agent into a neutralization reaction kettle in proportion, and keeping Na: the specific gravity of P is 1.5-1.55, then the neutralization solution is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 140-150 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 170-220 ℃, the time is controlled to be 30-50 minutes, an anhydrous trisodium pyrophosphate initial product is obtained, and finally the anhydrous trisodium pyrophosphate initial product is cooled, crushed, screened and packaged, so that a high-quality finished product of the anhydrous trisodium pyrophosphate can be obtained. The method is simple to operate and convenient to use, can be used for not only realizing 24-hour continuous production, but also producing products with high purity, high solubility, stable pH value and large yield, has lower production cost compared with other processes, and can effectively reduce the cost.
Description
Technical Field
The invention relates to the technical field of food additive teaching, in particular to a production process of anhydrous trisodium pyrophosphate.
Background
The food phosphate is widely applied to the food industry, mainly serves as a nutrition enhancer and a quality modifier in function, can meet the requirement of fast-paced life of modern people, can still keep stable development for a long time in the future, and keeps the increasing trend of the demand of high value-added products in the development of food-grade phosphate in the future. Sodium pyrophosphate is widely used as a water retention agent in meat products and aquatic products, but sodium pyrophosphate has high pH value and poor solubility, particularly has slow dissolution speed under low temperature conditions, is easy to agglomerate in solution, and influences the color and taste of food.
The trisodium pyrophosphate is a white powdery crystal, is easy to dissolve in water, has a nearly neutral aqueous solution, is insoluble in ethanol, is a member of a pyrophosphate family with better water retention property, is widely used as a water retention agent in the food industry, is a phosphate between sodium pyrophosphate and disodium dihydrogen pyrophosphate, and is a new food additive variety approved by the ministry of health. The pH value is neutral, so the compound has better solubility compared with alkaline pyrophosphate, and can be used as food additive (moisture retention agent, emulsifier, flavoring agent).
However, the traditional production process of trisodium pyrophosphate is mainly a crystallization and drying method, and has the disadvantages of complex operation, low yield, unstable product quality and low purity. Due to the ever-expanding market demand, the improvement and optimization of the traditional production process is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a production process of anhydrous trisodium pyrophosphate.
The technical scheme adopted by the invention for realizing the purpose is as follows: the production process of anhydrous trisodium pyrophosphate is characterized by comprising the following steps: the composite material comprises the following raw materials in parts by weight:
300-400 parts of sodium hydroxide;
200-300 parts of sodium sulfide;
150-280 parts of phosphoric acid;
3-5 parts of a stabilizer;
2-3 parts of a defoaming agent;
1-3 parts of deionized water.
Preferably, an anhydrous trisodium pyrophosphate as described above wherein: the composite material comprises the following raw materials in parts by weight:
300 parts of sodium hydroxide;
200 parts of sodium sulfide;
150 parts of phosphoric acid;
3 parts of a stabilizer;
2 parts of a defoaming agent;
and 1 part of deionized water.
Preferably, an anhydrous trisodium pyrophosphate as described above wherein: the composite material comprises the following raw materials in parts by weight:
400 parts of sodium hydroxide;
300 parts of sodium sulfide;
280 parts of phosphoric acid;
35 parts of a stabilizer;
3 parts of a defoaming agent;
3 parts of deionized water.
The invention also provides a production process of the anhydrous trisodium pyrophosphate, which is characterized by comprising the following steps:
step S1: adding 200-300 parts of sodium sulfide and 1-3 parts of deionized water into a dissolving kettle, mixing and dissolving to form a sodium sulfide solution, and pumping the sodium sulfide solution into a sodium sulfide solution elevated tank;
step S2: adding a sodium sulfide solution in a sodium sulfide solution elevated tank into an acid-base reaction kettle for reaction to generate a hydrogen sulfide gas, and introducing the hydrogen sulfide gas into a mixed elevated tank by using a jet pump for pre-reaction;
step S3: after the pre-reaction of the hydrogen sulfide gas in the acid-base reaction kettle is finished, carrying out desulfurization treatment by using compressed air under the condition of heating;
step S4: adding 150-280 parts of phosphoric acid into an acid-base reaction kettle for reaction, adding the reaction product into a mixing head tank to form a mixed acid solution, continuously feeding the mixed acid solution into a dearsenification tower through a regulating valve for dearsenification reaction, transferring the mixed acid solution in the dearsenification tower into a transfer pot, performing solid-liquid separation on the mixed acid solution in the transfer pot to obtain a filtered acid liquid, feeding the filtered acid liquid into a filtered acid storage tank, pumping the filtered acid liquid in the filtered acid storage tank into a desulfurization tower by using a pump, and desulfurizing by using compressed hot air to obtain food phosphoric acid;
step S5: 300-400 parts of sodium hydroxide, food phosphoric acid, 3-5 parts of stabilizer and 2-3 parts of defoaming agent are added into a neutralization reaction kettle in proportion, and the Na: the specific gravity of P is 1.5-1.55, then the neutralization solution is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 140-150 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 170-220 ℃, the time is controlled to be 30-50 minutes, and the anhydrous trisodium pyrophosphate initial product is obtained;
step S6: and cooling, crushing and screening the initial anhydrous trisodium pyrophosphate product, and packaging to obtain a high-quality finished product of anhydrous trisodium pyrophosphate.
Further, the production process of the anhydrous trisodium pyrophosphate comprises the following steps: in the step S3, the heating temperature is 70-120 ℃.
Further, the production process of the anhydrous trisodium pyrophosphate comprises the following steps: in step S4, the mixed acid solution in the transfer pot undergoes solid-liquid separation for 2 to 4 times.
Further, the production process of the anhydrous trisodium pyrophosphate comprises the following steps: in step S5, the anhydrous trisodium pyrophosphate is continuously produced for 24 hours through the processes of cooling, crushing and screening.
The invention has the beneficial effects that: the production process of the anhydrous trisodium pyrophosphate is simple to operate and convenient to use, can be used for continuous production for 24 hours, can produce products with high purity, high solubility, stable pH value and large yield, has lower production cost compared with other processes, and can effectively reduce the cost.
Drawings
FIG. 1 is a schematic flow diagram of a process for producing anhydrous trisodium pyrophosphate according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, in the implementation:
example 1: a process for producing anhydrous trisodium pyrophosphate, comprising the following steps:
(1) adding 200 parts of sodium sulfide and 1 part of deionized water into a dissolving kettle, mixing and dissolving to form a sodium sulfide solution, and pumping the sodium sulfide solution into a sodium sulfide solution head tank;
(2) adding a sodium sulfide solution in a sodium sulfide solution elevated tank into an acid-base reaction kettle for reaction to generate a hydrogen sulfide gas, and introducing the hydrogen sulfide gas into a mixed elevated tank by using a jet pump for pre-reaction;
(3) after the pre-reaction of the hydrogen sulfide gas in the acid-base reaction kettle is finished, carrying out desulfurization treatment by using compressed air under the condition of heating;
(4) adding 150 parts of phosphoric acid into an acid-base reaction kettle for reaction, adding the reaction product into a mixing head tank to form a mixed acid solution, continuously feeding the mixed acid solution into an arsenic removal tower through a regulating valve for arsenic removal reaction, transferring the mixed acid solution in the arsenic removal tower into a transfer pot, performing solid-liquid separation on the mixed acid solution in the transfer pot to obtain a filtered acid liquid, feeding the filtered acid liquid into a filtered acid storage tank, pumping the filtered acid liquid in the filtered acid storage tank into a desulfurization tower by using a pump, and performing desulfurization by using compressed hot air to obtain food phosphoric acid;
(5)300 parts of sodium hydroxide, food phosphoric acid, 3 parts of stabilizer and 2 parts of defoaming agent are added into a neutralization reaction kettle in proportion, and the ratio of Na: the specific gravity of P is 1.5, then the neutralized liquid is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 140 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 170 ℃, and the time is controlled to be 30 minutes, so as to obtain an anhydrous trisodium pyrophosphate initial product;
(6) and cooling, crushing and screening the initial anhydrous trisodium pyrophosphate product, and packaging to obtain a high-quality finished anhydrous trisodium pyrophosphate product.
Example 2: a process for producing anhydrous trisodium pyrophosphate, comprising the following steps:
(1) adding 240 parts of sodium sulfide and 2 parts of deionized water into a dissolving kettle, mixing and dissolving to form a sodium sulfide solution, and pumping the sodium sulfide solution into a sodium sulfide solution head tank;
(2) adding a sodium sulfide solution in a sodium sulfide solution elevated tank into an acid-base reaction kettle for reaction to generate a hydrogen sulfide gas, and introducing the hydrogen sulfide gas into a mixed elevated tank by using a jet pump for pre-reaction;
(3) after the pre-reaction of the hydrogen sulfide gas in the acid-base reaction kettle is finished, carrying out desulfurization treatment by using compressed air under the condition of heating;
(4) adding 180 parts of phosphoric acid into an acid-base reaction kettle for reaction, adding the reaction product into a mixing head tank to form a mixed acid solution, continuously feeding the mixed acid solution into an arsenic removal tower through a regulating valve for arsenic removal reaction, transferring the mixed acid solution in the arsenic removal tower into a transfer pot, performing solid-liquid separation on the mixed acid solution in the transfer pot to obtain a filtered acid liquid, feeding the filtered acid liquid into a filtered acid storage tank, pumping the filtered acid liquid in the filtered acid storage tank into a desulfurization tower by using a pump, and performing desulfurization by using compressed hot air to obtain food phosphoric acid;
(5)350 parts of sodium hydroxide, food phosphoric acid, 4 parts of stabilizer and 2.5 parts of defoaming agent are added into a neutralization reaction kettle in proportion, and the ratio of Na: the specific gravity of P is 1.52, then the neutralized liquid is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 145 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 190 ℃, and the time is controlled to be 40 minutes, so as to obtain an anhydrous trisodium pyrophosphate initial product;
(6) and cooling, crushing and screening the initial anhydrous trisodium pyrophosphate product, and packaging to obtain a high-quality finished product of anhydrous trisodium pyrophosphate.
Example 3: a process for producing anhydrous trisodium pyrophosphate, comprising the following steps:
(1) adding 300 parts of sodium sulfide and 3 parts of deionized water into a dissolving kettle, mixing and dissolving to form a sodium sulfide solution, and pumping the sodium sulfide solution into a sodium sulfide solution head tank;
(2) adding a sodium sulfide solution in a sodium sulfide solution elevated tank into an acid-base reaction kettle for reaction to generate a hydrogen sulfide gas, and introducing the hydrogen sulfide gas into a mixed elevated tank by using a jet pump for pre-reaction;
(3) after the pre-reaction of the hydrogen sulfide gas in the acid-base reaction kettle is finished, carrying out desulfurization treatment by using compressed air under the condition of heating;
(4) adding 280 parts of phosphoric acid into an acid-base reaction kettle for reaction, adding the reaction product into a mixing head tank to form a mixed acid solution, continuously feeding the mixed acid solution into an arsenic removal tower through a regulating valve for arsenic removal reaction, transferring the mixed acid solution in the arsenic removal tower into a transfer pot, performing solid-liquid separation on the mixed acid solution in the transfer pot to obtain a filtered acid liquid, feeding the filtered acid liquid into a filtered acid storage tank, pumping the filtered acid liquid in the filtered acid storage tank into a desulfurization tower by using a pump, and performing desulfurization by using compressed hot air to obtain food phosphoric acid;
(5)400 parts of sodium hydroxide, food phosphoric acid, 5 parts of stabilizer and 3 parts of defoaming agent are added into a neutralization reaction kettle in proportion, and the ratio of Na: the specific gravity of P is 1.55, then the neutralized liquid is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 150 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 220 ℃, the time is controlled to be 50 minutes, and the anhydrous trisodium pyrophosphate initial product is obtained;
(6) and cooling, crushing and screening the initial anhydrous trisodium pyrophosphate product, and packaging to obtain a high-quality finished product of anhydrous trisodium pyrophosphate.
The physicochemical indexes of the examples 1 to 3 are as follows:
the method is simple to operate and convenient to use, can be used for not only realizing 24-hour continuous production, but also producing products with high purity, high solubility, stable pH value and large yield, has lower production cost compared with other processes, and can effectively reduce the cost.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. Anhydrous trisodium pyrophosphate, characterized by: the composite material comprises the following raw materials in parts by weight:
300-400 parts of sodium hydroxide;
200-300 parts of sodium sulfide;
150-280 parts of phosphoric acid;
3-5 parts of a stabilizer;
2-3 parts of a defoaming agent;
1-3 parts of deionized water.
2. Anhydrous trisodium pyrophosphate according to claim 1, characterized in that: the composite material comprises the following raw materials in parts by weight:
300 parts of sodium hydroxide;
200 parts of sodium sulfide;
150 parts of phosphoric acid;
3 parts of a stabilizer;
2 parts of a defoaming agent;
1 part of deionized water.
3. Anhydrous trisodium pyrophosphate according to claim 1, characterized in that: the composite material comprises the following raw materials in parts by weight:
400 parts of sodium hydroxide;
300 parts of sodium sulfide;
280 parts of phosphoric acid;
35 parts of a stabilizer;
3 parts of a defoaming agent;
3 parts of deionized water.
4. The process for the production of anhydrous trisodium pyrophosphate according to claim 1, comprising the following steps:
step S1: adding sodium sulfide and water into a dissolving kettle, mixing and dissolving to form a sodium sulfide solution, and pumping the sodium sulfide solution into a sodium sulfide solution head tank;
step S2: adding the sodium sulfide solution in the sodium sulfide solution head tank into an acid-base reaction kettle for reaction to generate hydrogen sulfide gas, and introducing the hydrogen sulfide gas into the mixed head tank by using an injection pump for pre-reaction;
step S3: after the pre-reaction of the hydrogen sulfide gas in the acid-base reaction kettle is finished, carrying out desulfurization treatment by using compressed air under the condition of heating;
step S4: adding phosphoric acid into an acid-base reaction kettle for reaction, adding the reaction product into a mixing head tank to form a mixed acid solution, continuously feeding the mixed acid solution into an arsenic removal tower through a regulating valve for arsenic removal reaction, transferring the mixed acid solution in the arsenic removal tower into a transfer pot, performing solid-liquid separation on the mixed acid solution in the transfer pot to obtain a filtered acid liquid, feeding the filtered acid liquid into a filtered acid storage tank, pumping the filtered acid liquid in the filtered acid storage tank into a desulfurization tower by using a pump, and performing desulfurization by using compressed hot air to obtain food phosphoric acid;
step S5: sodium hydroxide, food phosphoric acid, a stabilizer and a defoaming agent are added into a neutralization reaction kettle in proportion, and the ratio of Na: the specific gravity of P is 1.5-1.55, then the neutralization solution is pumped into a powder spraying tower by a high-pressure pump to be dried at the temperature of 140-150 ℃, the obtained powder is sent into a polymerization furnace to be polymerized at the temperature of 170-220 ℃, the time is controlled to be 30-50 minutes, and the anhydrous trisodium pyrophosphate initial product is obtained;
step S6: and cooling, crushing and screening the initial anhydrous trisodium pyrophosphate product, and packaging to obtain a high-quality finished product of anhydrous trisodium pyrophosphate.
5. The process of claim 4, wherein the trisodium pyrophosphate anhydrate production process comprises: in the step S3, the heating temperature is 70-120 ℃.
6. The process of claim 4, wherein the trisodium pyrophosphate anhydrate production process comprises: in the step S4, the mixed acid solution in the transfer pot undergoes solid-liquid separation for 2-4 times.
7. The process of claim 4, wherein the trisodium pyrophosphate anhydrate preparation comprises: in step S5, the anhydrous trisodium pyrophosphate is continuously produced for 24 hours through the processes of cooling, crushing and screening.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2500486A1 (en) * | 1975-01-08 | 1976-07-15 | Benckiser Knapsack Gmbh | METHOD AND APPARATUS FOR PRODUCING TRINATRIUM PHOSPHATE |
| JPS63134508A (en) * | 1986-11-21 | 1988-06-07 | Mitsui Toatsu Chem Inc | Production of sodium pyrophosphate having excellent solubility |
| CN101121506A (en) * | 2007-07-30 | 2008-02-13 | 四川宏达股份有限公司 | Technique for preparing sodium pyrophosphate from wet method phosphoric acid |
| CN102887495A (en) * | 2012-09-16 | 2013-01-23 | 湖北兴发化工集团股份有限公司 | Method for producing trisodium monohydrogen diphosphate by neutralization process |
| CN102923683A (en) * | 2012-11-14 | 2013-02-13 | 云南莱德福科技有限公司 | Preparation method of trisodium pyrophosphate |
| CN102963875A (en) * | 2012-09-16 | 2013-03-13 | 湖北兴发化工集团股份有限公司 | Production method of trisodium pyrophosphate |
| CN104891466A (en) * | 2015-05-14 | 2015-09-09 | 湖北兴发化工集团股份有限公司 | Production method of instant food-grade sodium pyrophosphate |
-
2022
- 2022-05-29 CN CN202210595453.8A patent/CN114804050A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2500486A1 (en) * | 1975-01-08 | 1976-07-15 | Benckiser Knapsack Gmbh | METHOD AND APPARATUS FOR PRODUCING TRINATRIUM PHOSPHATE |
| JPS63134508A (en) * | 1986-11-21 | 1988-06-07 | Mitsui Toatsu Chem Inc | Production of sodium pyrophosphate having excellent solubility |
| CN101121506A (en) * | 2007-07-30 | 2008-02-13 | 四川宏达股份有限公司 | Technique for preparing sodium pyrophosphate from wet method phosphoric acid |
| CN102887495A (en) * | 2012-09-16 | 2013-01-23 | 湖北兴发化工集团股份有限公司 | Method for producing trisodium monohydrogen diphosphate by neutralization process |
| CN102963875A (en) * | 2012-09-16 | 2013-03-13 | 湖北兴发化工集团股份有限公司 | Production method of trisodium pyrophosphate |
| CN102923683A (en) * | 2012-11-14 | 2013-02-13 | 云南莱德福科技有限公司 | Preparation method of trisodium pyrophosphate |
| CN104891466A (en) * | 2015-05-14 | 2015-09-09 | 湖北兴发化工集团股份有限公司 | Production method of instant food-grade sodium pyrophosphate |
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