WO2004080893A1 - 高純度メタリン酸塩及びその製造方法 - Google Patents
高純度メタリン酸塩及びその製造方法 Download PDFInfo
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- WO2004080893A1 WO2004080893A1 PCT/JP2004/003007 JP2004003007W WO2004080893A1 WO 2004080893 A1 WO2004080893 A1 WO 2004080893A1 JP 2004003007 W JP2004003007 W JP 2004003007W WO 2004080893 A1 WO2004080893 A1 WO 2004080893A1
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- metaphosphate
- purity
- aluminum
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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
- C01B25/44—Metaphosphates
Definitions
- the present invention relates to a high-purity metal phosphate and a method for producing the same.
- metal phosphate is considered to be effective as a raw material for phosphate glass because of its high phosphorus content per unit weight.
- Typical examples of the metaphosphate used as a raw material of the phosphate glass include aluminum phosphate and barium metaphosphate.
- aluminum metal phosphate can be obtained by heating a mixed slurry of aluminum hydroxide and dibasic ammonium phosphate at 630 ° C for 1 hour.
- aluminum metaphosphate is mixed with the raw materials, and the mixture is calcined and reacted. It has been proposed to produce aluminum (see, for example, Japanese Patent Application Laid-Open No. 2003-63611). Furthermore, the reaction solution of aluminum biphosphate is reacted with aluminum hydroxide and phosphoric acid.
- an object of the present invention is to provide a high-purity metaphosphate capable of solving the above-mentioned various disadvantages of the prior art and a method for producing the same.
- the present invention has achieved the above object by providing a high-purity metaphosphate characterized in that each of the colored metal element concentrations of impurities is 5 ppm or less. Further, the present invention provides, as a preferred method for producing the mesophosphate, a first step of producing a metal phosphate by reacting a metal compound constituting the metaphosphate with phosphoric acid. , as well as
- a method for producing high-purity male phosphate comprising a second step of adding the phosphate obtained in the first step to a baking vessel preliminarily laid with the metaphosphate powder and firing.
- the present invention provides a preferable production method when the metaphosphate is an aluminum salt
- a method for producing a high-purity metal phosphate which comprises baking a mixture obtained by mixing an aluminum compound, phosphoric anhydride and polyphosphoric acid in a baking vessel preliminarily laid with aluminum metaphosphate powder. It provides BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is an XRD chart of the aluminum metaphosphate obtained in the example.
- FIG. 2 is an XRD chart of barium metaphosphate obtained in the example.
- FIG. 3 is an XRD chart of zinc metaphosphate obtained in the example.
- FIG. 4 is an XRD chart of calcium metaphosphate obtained in the example.
- FIG. 5 is an XRD chart of magnesium metaphosphate obtained in the example.
- the metaphosphate of the present invention has a concentration of each colored metal element contained as an impurity of 5 ppm or less, preferably 3 ppm or less.
- Colored metal elements include at least one of iron, chromium, nickel, manganese or copper. If a metaphosphate containing these colored metal elements in a concentration of more than 5 ppm is used, for example, as a raw material for producing an optical lens, the degree of coloring of the obtained optical lens will increase sharply.
- the concentration of iron is preferably 5 ppm or less, particularly preferably 3 ppm or less.
- the content of each colored metal element in the metaphosphate of the present invention is measured by dissolving the metal phosphate in an aqueous sodium hydroxide solution to prepare a measurement sample, and using the measurement sample by ICP emission spectroscopy. I do.
- the metaphosphate of the present invention include an aluminum salt, a barium salt, a zinc salt, a calcium salt, a magnesium salt, and a strontium salt. The salt to be used is appropriately determined depending on the specific use of the metal phosphate.
- the phosphate of the present invention has a free phosphoric acid (P 2 O s ) content of preferably 2% or less, more preferably 1% or less, and still more preferably 0.3% or less. . If the free phosphoric acid is more than 2%, the hygroscopicity increases, and the water content in the metaphosphate increases. Therefore, when the metaphosphate of the present invention is used as a raw material for producing an optical lens, it is difficult to handle. In some cases, problems such as poor deterioration of the glass or fluctuation of the refractive index of the glass may occur.
- the content of free phosphoric acid as referred to herein refers to a-phosphate coming be dissolved when water washing, have been translated by the P 2 0 5.
- the metaphosphate of the present invention preferably has a purity of 96% or more, particularly preferably 97% or more. When the purity is less than 96%, when the metaphosphate of the present invention is used as a raw material for producing an optical lens, as in the case of free phosphoric acid, the eight-ring becomes poor or the refractive index of the glass fluctuates. Etc. may occur.
- the molar ratio of P 2 0 5 and a metal oxide in methallyl emissions salt (PO sZ Metal oxides) in the case of aluminum metaphosphate, P 2 ⁇ 5 ZA 1 2 0 3 2. 4 ⁇ 3. 2 It is particularly preferably 2.7 to 3.1, especially 3 to 3.05.
- P 2 O 5 ZB a ⁇ 0.85 to 1.1, particularly 0.9 to 1.
- the content of P 2 0 5 in the metaphosphate, vanadate Anmoniumu It can be determined by a colorimetric method by mixing with ammonium molybdate.
- the metal oxide in the methallyl emissions salt content e.g., A 1 2 0 3 and B a O, etc.
- the metal phosphate of the present invention preferably has a loss on ignition of 2% or less, particularly preferably 1% or less.
- This production method comprises a first step of producing a phosphate of the metal by reacting a metal compound constituting the metal phosphate with phosphoric acid, and a baking vessel previously covered with the metal phosphate powder. And a second step in which the phosphate obtained in the first step is added and calcined.
- M (H 2 P 0 4 ) n (wherein, M represents a metal, n represents represents the valence of M) means a biphosphate salt represented by I do.
- This production method will be described with reference to an example of a method for producing aluminum metaphosphate which is a kind of metaphosphate.
- a metal compound constituting the metaphosphate is reacted with phosphoric acid.
- the “metal compound constituting the metal phosphate” refers to an aluminum compound when the metal phosphate is, for example, an aluminum salt.
- the aluminum compound to be used for example, aluminum hydroxide, aluminum oxide such as -alumina, 3-alumina and er-alumina are preferably used.
- aluminum hydroxide because a high-purity product can be easily obtained industrially.
- aluminum oxide in addition to aluminum oxide and phosphoric acid, It is preferable to add an appropriate amount of water. The reason for this is that aluminum biphosphate is solidified in the reaction system and is difficult to remove as a liquid.
- the phosphoric acid is not particularly limited, but preferably has a high purity of 85% or more, particularly preferably an electronic material.
- Such phosphoric acid can be obtained, for example, from Nippon Chemical Industry. Both can be mixed at room temperature.
- the reaction in this step is represented by the following formula when aluminum hydroxide or aluminum oxide is used as the aluminum compound. As is clear from this equation, the reaction produces aluminum phosphate (aluminum biphosphate).
- reaction may be carried out at room temperature or under heating.
- the reaction temperature may be up to 150 ° C., usually between 100 and 120 ° C.
- the reaction time is not particularly limited, but is usually about 30 minutes.
- It is preferable molar ratio of the feed of phosphoric acid and aluminum compounds are stoichiometric ratio, optionally adjusting expressed as molar ratios between 2.7 to 3.1 of (P 2 o 5 aluminum compound) can do.
- the aluminum phosphate obtained by the above reaction is a viscous liquid mainly composed of aluminum biphosphate containing about 25% by weight of water.
- the reaction product of the first step which is a viscous liquid
- the reaction product of the first step does not directly contact the bottom of the firing vessel.
- impurities are less mixed into aluminum metaphosphate, which is a reaction product.
- aluminum metaphosphate can be easily separated from the firing container.
- the aluminum metal phosphate powder previously laid in the firing vessel plays the role of laying powder (one set).
- the peelability between the firing vessel and the fired product and the impurity concentration in the fired product differ. For example, it is preferable to spread it evenly along the wall.
- the ratio of the aluminum metaphosphate powder to be laid in the firing vessel to the reaction product of the first step added to the vessel is not particularly limited, but is based on the weight ratio of the former to the latter.
- the firing container is not particularly limited as long as the container does not contain a colored metal.
- a container made of metal aluminum, alumina, cordierite, a hollow glass having a metal-coated ceramic surface, or the like It is preferred to use In particular, it is preferable to use a container made of metal aluminum or alumina. This can minimize the incorporation of colored metal elements.
- the reaction by baking performed in this step is as follows.
- the firing temperature is 350 ° C or more, especially 500. It is preferably at least C, more preferably at least 550 ° C. If the firing temperature is too low, the amount of free phosphoric acid tends to increase due to the incomplete dehydration of aluminum biphosphate, which is the reaction product of the first step.
- There is no particular upper limit on the firing temperature It depends on the melting point of the vessel. When the firing container is made of metallic aluminum, the upper limit of the firing temperature is about 65O 0 C. When the firing container is made of alumina, the upper limit of the firing temperature is equal to or lower than the melting point of aluminum metaphosphate. There is no particular limitation on the firing time. Generally, 2 hours or more is sufficient, and preferably 3 hours to 6 hours.
- the firing step is not particularly limited, but may be a batch method using single-stage firing or multi-stage firing, or a continuous firing using a continuous firing furnace such as a roller-housing kiln.
- a third step of pulverizing the calcined product obtained in the second step may be performed.
- a pulverizer having a lining process of alumina or the like in order to avoid mixing of impurities.
- the degree of pulverization depends on the specific use of the aluminum metaphosphate, but when it is used as a raw material for the production of optical lenses, it is passed through a sieve of 16 to 32 mesh, especially about 20 to 28 mesh. Is preferred.
- the aluminum metaphosphate powder obtained by the pulverization contains an excessive amount of phosphoric acid, it absorbs moisture on the surface and causes lumps or solidification during storage. Therefore, a fourth step of removing the free phosphoric acid by drying the powder obtained in the third step after washing with water may be performed.
- the thus obtained aluminum metaphosphate is used for various purposes.
- a part of the obtained aluminum metal methacrylate is used for the metallin laying in the firing vessel in the second step. Used as aluminum acid powder.
- barium metaphosphate which is another example of a metal phosphate, will be described. Unless otherwise described, the description of the method for producing aluminum metaphosphate described above is applied as appropriate.
- This production method comprises a first step in which a barium compound and phosphoric acid are heated and reacted to produce a reaction product thereof, and a step in which the reaction product obtained in the first step is placed in a firing vessel preliminarily coated with barium metaphosphate powder. And firing the mixture.
- the reaction product obtained in the first step is granular, and the barium compound used as a raw material is present near the center of the particle in an unreacted state, and is not present on the surface of the particle. It is presumed that H 3 P ⁇ 4 of the reaction is attached, and the portion between them is Ba (H 2 P ⁇ 4 ) 2 .
- the barium compound used in the first step for example, barium hydroxide or barium carbonate is suitably used.
- barium carbonate is preferable because a high-purity product can be easily obtained industrially.
- the phosphoric acid is not particularly limited, but is preferably one having a high purity of 85% or more, particularly preferably one for electronic materials. Both can be mixed at room temperature.
- the reaction in this step is represented by the following formula when barium carbonate or barium hydroxide is used as the barium compound.
- B a (OH) 2 + 2 H 3 PO, + 3 H 2 0-> reaction of B a (H 2 P 0 4 ) 2 + 2 H 2 0 above can be carried out at room temperature or under heating.
- Reaction temperature is 10 It can be up to 0 ° C, usually 70-80 ° C.
- the reaction time is not particularly limited, but is usually about 30 minutes.
- the molar ratio of the feed of phosphoric acid and Pariumu compound can be adjusted to anywhere between 0.8 5 to 1.1 represented by (P 2 0 5 / B a 0).
- the reaction product obtained by the above reaction is a powder containing water.
- the reaction product obtained in the first step is added to the firing vessel under a condition in which the barium metaphosphate powder is laid in the firing vessel, so that the reaction product does not come into direct contact with the firing vessel. .
- contamination of impurities into the metal phosphate, which is a reaction product in the second step is reduced.
- barium metaphosphate is easily peeled from the firing container. In this way, the barium metaphosphate powder previously laid in the firing vessel plays the role of laying powder (one set). From this point of view, it is preferable that the phosphoric acid barium powder is spread evenly along the bottom and, if possible, the wall surface of the firing vessel.
- the ratio between the barium metaphosphate powder spread in the firing vessel and the reaction product obtained in the first step is not particularly limited, but the weight ratio of the former to the latter is 40:60 to 60:40. However, it is preferable from the viewpoint of preventing the reaction product obtained in the first step from coming into contact with the firing vessel.
- the firing container the same firing container as that used in the above-described method for producing aluminum metal phosphate can be used.
- the reaction by baking performed in this step is as follows.
- the firing temperature is preferably 350 ° C. or higher, particularly 500 ° C. or higher, particularly preferably 550 ° C. or higher. If the calcination temperature is too low, the amount of free phosphoric acid tends to increase due to incomplete dehydration of the reaction product obtained in the first step.
- There is no particular upper limit on the firing temperature which depends on the melting point of the firing vessel. When the firing container is made of metallic aluminum, the upper limit of the firing temperature is about 650 ° C. When the firing container is made of alumina, the upper limit of the firing temperature is equal to or lower than the melting point of phosphoric acid phosphorous.
- the firing time There is no particular limitation on the firing time. Generally, 2 hours or more is sufficient, and preferably 3 hours to 6 hours. After the completion of the firing, cooling is performed to obtain a lump of barium metaphosphate, which is a fired product. After the second step, the third step and the fourth step described above may be performed as necessary. Next, a method for producing zinc metaphosphate as a metal phosphate will be described. Regarding points that are not particularly described with respect to the present manufacturing method, the above description regarding the method for manufacturing aluminum metaphosphate or barium metaphosphate is appropriately applied.
- the zinc compound used in the first step for example, zinc oxide can be used. Zinc oxide and phosphoric acid were mixed at room temperature, and the mixture was made up to 200. Transfer the solution heated and concentrated to C in a Teflon (registered trademark) container and cool to room temperature. As a result, zinc biphosphate consisting of a vitrified solid is obtained.
- the reaction in this step is represented by the following formula.
- Zinc oxide when the particle is rough, sometimes particles will remain insoluble when mixed with phosphoric acid . Therefore, it is preferable to use only fine particles by sieving with a sieve having an opening of l mm before the reaction.
- the molar ratio between zinc oxide and phosphoric acid (the former: the latter) is preferably 1: 2, but the phosphoric acid may be in excess of about 1-2%. Excessive zinc oxide is not preferred because the resulting zinc metaphosphate becomes gray.
- zinc oxide powder and phosphoric acid are mixed and heated from room temperature to 200 ° C. The water purified in the reaction is removed by heating. Start heating
- the reaction in this step is as follows.
- the sintering temperature and the sintering time can be the same as in the case of aluminum metaphosphate and barium metaphosphate described above.
- the third step and the fourth step described above may be performed.
- the methods for producing various metal phosphates have been described above.
- the other methods for producing metal phosphates are the metal compounds used in the first step, and the metal phosphates to be spread on the firing vessel in the second step.
- the other operations can be the same as in the method described above. For example, when manufacturing calcium phosphate, calcium carbonate, calcium hydroxide, calcium oxide, or the like is used as the calcium compound used in the first step, and the calcining volume is used in the second step.
- a calcium salt may be used as the metaphosphate to be spread on the vessel.
- magnesium metaphosphate magnesium carbonate, magnesium hydroxide, magnesium oxide, etc. are used as the magnesium compound used in the first step, and magnesium salt is used as the phosphate in the second step in a firing vessel.
- strontium metaphosphate strontium metaphosphate is produced, strontium hydroxide, strontium oxide, strontium carbonate, etc. are used as the strontium compound used in the first step, and phosphoric acid phosphate is laid in a firing vessel in the second step.
- a strontium salt may be used.
- the following method can be employed when producing aluminum metaphosphate.
- the description of the manufacturing method described above is appropriately applied to the points that are not particularly described in the present manufacturing method.
- a mixture obtained by mixing an aluminum compound, phosphoric anhydride, and polyphosphoric acid is placed in a firing vessel in which aluminum metaphosphate powder has been previously spread and fired.
- the aluminum compound the same compounds as those used in the method for producing aluminum metaphosphate described above can be used.
- Anhydride-phosphate (i.e. P 2 ⁇ 5) and poly phosphoric acid (e.g. 1 1 6% H 3 P_ ⁇ 4) is not particularly limited in kind if Re those commercially available. For example, it can be obtained from Japan Chemical Industry.
- an aluminum compound and phosphoric anhydride may be mixed and fired.
- a sufficient reaction is not performed, so that the resulting aluminum metal phosphate is not white, and the content of free phosphoric acid and loss on ignition are high. Therefore, in this production method, water is replenished to the reaction system by adding and mixing polyphosphoric acid in addition to the aluminum compound and phosphoric anhydride, and It promotes a simple firing reaction.
- the purpose of adding polyphosphoric acid is to increase the degree of mixing of the raw materials (the aluminum compound and phosphoric anhydride).
- the reaction in the present production method is represented by the following formula when aluminum hydroxide is used as the aluminum compound.
- an aluminum compound and phosphoric anhydride are mixed. Mixing can be performed at room temperature. The mixing time depends on the mixing amount, but 5 minutes or more is sufficient. Next, the mixture of the two is mixed with a polylactic acid. No special operation is required at this time. A mixing time of at least 5 minutes is sufficient.
- the mixture obtained by the mixing of the three is in the form of a sticky, soft rice cake.
- This mixture is placed in a firing vessel preliminarily laid with aluminum metaphosphate powder and fired.
- the reason why the aluminum metaphosphate powder is laid beforehand in the firing container is the same as in the manufacturing method described above. The same applies to the firing conditions.
- the thus obtained fired product, aluminum metal phosphate is pulverized, washed with water and dried. The details of these steps are the same as in the manufacturing method described above.
- the various metal phosphates obtained in this way are used as raw materials for the production of optical lenses for digital video and digital cameras, and for the production of highly transparent glass for short-wavelength lasers in digital video disc players, and for the production of amplification fibers. It is particularly preferably used as a raw material or an electrolyte raw material for a secondary battery. Particularly, it is suitably used as a raw material for producing an optical lens.
- the aluminum biphosphate reaction liquid obtained in the first step was transferred to a firing vessel made of metallic aluminum to which aluminum metaphosphate powder had been previously spread.
- the firing vessel was placed in an electric furnace and heated to 550 ⁇ , and firing was performed while maintaining this temperature for 4 hours. After the completion of the firing, the resultant was cooled to obtain a lump of aluminum metaphosphate.
- Example 11-1 The aluminum metaphosphate powder obtained in the third step in Example 1 was washed with pure water and dried with a drier. Except for this, the procedure was the same as in Example 11-1.
- Example 1 Beaker 2 l, phosphoric acid (manufactured by Nippon Chemical Industrial (Co.), H 3 P 0 4 concentration of 8 5 wt% Pure-phosphate of) 3 0 8. Further high-purity water oxidation of aluminum were charged 2 g 78.0 g was added. P 2 0 5, A 1 molar ratio in terms of 2 O 3 (P 2 0 5 / A 1 2 0 3) is 2.7 0: 1. The reaction was started by heating the battery with an electric heater. The liquid temperature rose to around 120 C due to the heat of reaction. This state was maintained for 30 minutes. The reaction produced an aluminum biphosphate reaction solution. Thereafter, the second step and the third step in Example 1-1 were performed to obtain aluminum metaphosphate. (Examples 1 to 6)
- Example 1-1 In the second step of Example 1-1, the same operation as in Example 1-1 was performed except that the firing temperature was set at 250 ° C. The reaction of the obtained aluminum metal phosphate was not sufficient.
- Example 11 In the second step of step 11, the aluminum biphosphate reaction liquid obtained in the first step was transferred to a sintering container made of empty metallic aluminum on which no aluminum metaphosphate powder was laid, and baked. . The obtained aluminum metal phosphate lump adhered to the firing vessel and could not be removed. Next, the adhered matter was strongly blown out with a stainless steel spoon, and aluminum metaphosphate was obtained.
- A represents the absorbance of the sample
- B represents the absorbance of the standard second liquid
- a Use the test solution that was decomposed and prepared when measuring the content of phosphorus pentoxide.
- b. Dispense 20 ml of each test solution into three 10 O ml volumetric flasks.
- AI203 content (wt3 ⁇ 4) 18.95 18.87 18.78 19.03 19.81 16.74 18 Purity (wt3 ⁇ 4) 99.04 98.1 98.8 99.02 99.8 87.5 99.
- a 3 L mortar mixer was charged with 624 g of high-purity aluminum hydroxide and 774 g of phosphoric anhydride (manufactured by Nippon Chemical Industry Co., Ltd.) and mixed for 5 minutes.
- 110 g of polyphosphoric acid polyphosphoric acid 116 T, manufactured by Nippon Chemical Industry Co., Ltd.
- P 2 ⁇ 5 A 1 2 ⁇ 3 molar ratio in terms of (P 2 0 5 ZA 1 2 0 3) was 3.0 0.
- the resulting mixture became a rice cake-like kneaded product.
- This rice cake-like kneaded material was transferred to a firing container made of metal aluminum to which aluminum metaphosphate powder had been previously laid.
- the baking vessel containing the rice cake-like kneaded material was placed in an electric furnace, heated to 550 ° C, and maintained at this temperature for 4 hours for baking. After the completion of the firing, the resultant was cooled to obtain a lump of aluminum metaphosphate. The obtained lump of aluminum metaphosphate was pulverized with a pulverizer to obtain a powder of aluminum phosphate.
- Example 2-5 The charge molar ratio of P 2 0 5 / A 1 2 ⁇ 3 was set to 2.9 (Examples 2 to 2), 2.8 (Examples 2 to 3), 2.7 (Examples 2 to 4), 2. 6 A powder of aluminum metaphosphate was obtained in the same manner as in Example 2-1 except that each was changed to 6 (Example 2-5).
- Example 2-1 The aluminum metal phosphate powder obtained in Example 2-1 was washed with pure water and dried with a dryer. Except for this, it was the same as Example 2-1.
- An aluminum metal phosphate powder was obtained in the same manner as in Example 2-1 except that the firing time was reduced to 2 hours.
- Example 2-8 A powder of aluminum metal phosphate was obtained in the same manner as in Example 11 except that the charged amount of phosphoric anhydride was changed to 463 g, and the charged amount of polyphosphoric acid was changed to 1,473 g. .
- the molar ratio (P 2 0 5 / 'A 1 O 3) was 3. 0 0 in the same manner as in Example 2- 1.
- the baking vessel containing the rice cake-like kneaded material was placed in an electric furnace, heated to 550 ° C, and maintained at this temperature for 2 hours for baking. After the completion of the firing, the resultant was cooled to obtain a lump of aluminum metaphosphate. The obtained lump of aluminum metaphosphate was pulverized with a pulverizer to obtain aluminum metal phosphate powder.
- a 3 L mortar mixer was charged with 62 g of high-purity aluminum hydroxide and 170 g of phosphoric anhydride (manufactured by Nippon Chemical Industry Co., Ltd.) and mixed for 5 minutes. Then, 175 g of pure water was added. Phosphoric anhydride and pure water reacted violently to generate gas and did not become a rice cake-like kneaded product.
- the rice cake-like kneaded material was transferred to a sintering container made of empty metallic aluminum on which no aluminum metal phosphate powder was laid, and sintering was performed.
- the obtained lump of aluminum metaphosphate adheres to the firing vessel and cannot be taken out.
- the content of the colored metal element was measured by the method described above. It was also measured by the following methods purity measured metaphosphate aluminum Niumu purity (P 2 0 5 and A 1 2 0 3 content) (2). Was further measured P 2 O 5 / A 1 a 0 3 molar ratio of methallyl phosphate aluminum. Further, the content of free phosphoric acid and the loss on ignition in aluminum metaphosphate were measured by the methods described above. The results are shown in Table 2 below. [Purity measurement (2)]
- P 2 O 5 (wt%) and Al 2 ⁇ 3 (wt%) were separately obtained, and the total of these was calculated as the purity of aluminum metal phosphate.
- the way of finding is as follows. P For 2 0 5 (wt%), can be determined colorimetrically by mixing with vanadate Anmoniumu and molybdate Anmoniumu, A 1 2 O 3 (wt %) is ICP emission spectroscopy and Weight Method And can be obtained by adding
- a Use the test solution that was decomposed and prepared when measuring the content of phosphorus pentoxide.
- b. Dispense 5 ml of each sample solution into two 100 ml volumetric flasks.
- X is (Crucible weight after ashing (g)-Sanfu. Crucible weight before ashing (g)-
- the reaction product obtained in the first step was transferred to a firing vessel made of metallic aluminum on which barium metaphosphate powder had been spread beforehand.
- the firing vessel was placed in an electric furnace, heated to 550 ° C, and fired while maintaining this temperature for 4 hours. After the completion of the firing, the resultant was cooled to obtain a barium metaphosphate lump.
- the barium metaphosphate lump obtained in the second step was pulverized in an alumina mortar to obtain barium metaphosphate powder.
- the reaction product obtained in the first step was transferred to a sintering container made of empty metallic aluminum, and sintering was performed.
- a Measure approximately 1 g of the sample accurately to 0.1 mg with an electronic balance and place it in a 250 ml volumetric flask. Add 10 ml of perchloric acid, heat decompose the solution until the color of the solution turns yellow, and after cooling, make up to volume with pure water and mix well to make the test solution.
- b Dispense 2 ml of the test solution into a 100-m volumetric flask with a whole pipette, add 4 ml of nitric acid (1 + 1), and adjust the volume to 70 ml with pure water.
- Phosphate standards first liquid (P 2 0 5 as a 0. 3 7 mgZm 1), for even (0. AS mgZm l as P 0 5) second solution, each standard solution 1 0 m l it Dispense each sample into a 100-m volumetric flask and develop color in the same manner as the sample.
- ⁇ 2 ⁇ 5 (%) (3.7 + 0.6 / ⁇ )
- ⁇ represents the absorbance of the phosphoric acid standard solution 2
- B represents the absorbance of the test solution
- S represents the amount of sample (mg)
- BaO content ⁇ (%) heavy weight of parium sulfate S (remaining ( g ) X0.65697X250
- the solidified zinc biphosphate obtained in the first step was transferred and filled into a firing vessel made of alumina preliminarily coated with zinc metaphosphate powder.
- the firing vessel was placed in an electric furnace and heated from room temperature to 600 ° C. at 5 tZ min, and firing was performed while maintaining this temperature for 3 hours. After the completion of the calcination, the mixture was cooled to obtain a lump of zinc metal phosphate.
- the obtained lump of zinc metal phosphate was pulverized with a pulverizer to obtain a powder of zinc metaphosphate.
- Example 4-11 a baking vessel made of a cogelite (Example 4-2) and a baking vessel made of aluminum (Examples 4-13) are used. Except for the above, a powder of zinc phosphate was obtained in the same manner as in Example 4-11.
- Example 4-11 The same operation as in Example 4-11 was performed except that the firing temperature in the second step of Example 4-11 was set to 30 Ot :. Since the obtained zinc metal phosphate was not completely dehydrated, impurities and purity could not be measured. (Comparative Example 4-1 2)
- Example 4-3 the glassy solid was transferred to an empty firing vessel made of metallic aluminum on which zinc metaphosphate powder was not spread, and firing was performed.
- the resulting zinc metaphosphate formed a solid mass, which was difficult to stick to the firing vessel and peel off.
- Measurement of the purity of the zinc metaphosphate determines the content of P 2 ⁇ 5 and Z n O separately and calculate these total as the purity of the zinc metaphosphate.
- the way of finding is as follows.
- the obtained zinc metaphosphate powder was weighed into a Teflon (registered trademark) container with 100 g of O.sub.g, and 100 ml of a 20% Na0H solution was added thereto. Dissolve completely by heating with a stirrer. After cooling the solution to room temperature, 60 ml of concentrated hydrochloric acid is added little by little, and after boiling, the mixture is heated and stirred for 30 minutes in the above-mentioned stirrer.
- A represents the titer of the test solution (ml) 3 ⁇ 4
- B represents the titer of the blank test (ml) 3 ⁇ 4: represents,
- f represents the factor of the zinc standard solution
- S represents the weight of the sample.
- A represents the absorbance of diphosphorus pentoxide standard second solution
- B represents the absorbance of the test solution
- C represents the weight of P contained in the first solution of diphosphorus pentoxide
- S represents the weight of the sample.
- the phosphorous pentoxide standard solution is prepared by the following method. 0.4 5 8 mg Zml l Nitrogen pentoxide solution Take 10 and 11 ml in 100 ml volumetric flasks respectively, and add 50 ml of pure water. While stirring, add 20 ml of the color developing solution, make up to the mark at a pure volume, and let stand for 30 minutes. The resulting solutions were then diluted with diphosphorus pentoxide standard solution 1 (containing 0.0458 mg Zml of diphosphorus pentoxide) and diphosphorus pentoxide standard solution 2 (0.0504 mgZml of pentoxide, respectively). (Including diphosphorus).
- Chromium ppm ⁇ 0.3 ⁇ 0.3 ⁇ 0.3-0.3
- Manganese ppm
- ppm ⁇ 0.2 ⁇ 0.1 ⁇ 0.1-0.1
- Nickel ppm
- ppm ⁇ 2.3 ⁇ 2.3 ⁇ 2.3-2.3
- Copper ppm
- a firing container made of alumina pre-coated with calcium metaphosphate powder was transferred and filled.
- the firing vessel was placed in an electric furnace, and the temperature was raised from room temperature to 550 at 5/11 in. The temperature was maintained for 3 hours to perform firing. After the completion of the firing, the mixture was cooled to obtain a calcium metaphosphate mass.
- the obtained mass of calcium phosphate was ground in a porcelain mortar, and the washing-filtration was repeated with deionized water until the filtrate became neutral.
- the obtained precipitate was dried with a dryer set at 120 ° C. to obtain a calcium metaphosphate powder.
- the content of the colored metal was measured by the method described above.
- the purity of the calcium metaphosphate (P 2 0 5 and the content of C a O) was measured by the following methods purity determination of (5).
- P 2 ⁇ 5 ZC a O molar ratio in the calcium metaphosphate was measured by the methods described above.
- the content of free phosphoric acid and the loss on ignition in calcium metaphosphate were measured by the methods described above.
- the results are shown in Table 5 below.
- the crystal structure of the calcium metaphosphate powder obtained in Example 5-1 was measured with an X-ray diffractometer.
- Fig. 4 shows the results.
- the measurement conditions were a source Cu K O! Line, a scanning speed of 4 ° and a scanning range of 20 to 5 ° to 60 °.
- Measurement of the purity of methallyl phosphate calcium determines the content of P 2 0 5 and C A_ ⁇ separately and calculate total of these as the purity of the calcium metaphosphate.
- the way of finding is as follows. After weighing 1.0 g of the obtained calcium metal phosphate powder in a Teflon (registered trademark) container, adding 10 ml of a 20% NaOH solution, and then using a microwave decomposition device (manufactured by MILEST ON E) Decomposition was carried out using MLS 1200 MEGA), and 10 ml of concentrated hydrochloric acid was further added, followed by treatment with a microwave decomposition apparatus again.
- A represents the titer of the test solution (ml)
- B represents the titer of the blank test (ml)
- f represents the factor of the calcium standard solution
- 56.0778 represents the atomic weight of calcium oxide.
- A represents the absorbance of diphosphorus pentoxide standard solution 2
- B represents the absorbance of the test solution
- C represents the weight of P contained in the first solution of diphosphorus pentoxide
- S represents the weight of the sample
- the phosphorous pentoxide standard solution is prepared by the following method. 0.4 58 mg Zml l-Nitric pentoxide solution 100 ml Take 15 ml and 16 ml each in a volumetric flask, and add 50 ml of pure water. Add 2 Om1 of the color developing solution while stirring, make the volume pure and constant up to the marked line, and let stand for 30 minutes. The resulting solutions were each diluted with dinitrogen pentoxide standard solution 1 (containing 0.0687 mg Zml of dinitrogen pentoxide), dilute pentoxide standard second solution (0.073 3 mg / m 1 of diphosphorus pentoxide).
- the pasty substance obtained in the first step was transferred and filled into a firing vessel made of alumina preliminarily covered with magnesium metal phosphate powder.
- the firing vessel was placed in an electric furnace, the temperature was raised from room temperature to 550 ° C. at 5 min with Zmin, and firing was performed while maintaining this temperature for 3 hours. After the completion of the calcination, the mixture was cooled to obtain a lump of magnesium metaphosphate.
- the obtained lump of magnesium metaphosphate was pulverized in a porcelain mortar to obtain a powder of magnesium metaphosphate.
- the content of the colored metal was measured by the method described above.
- Measurement of the purity of methallyl phosphate magnesium determines the content of P 2 0 5 ⁇ Pi M G_ ⁇ separately issued calculated these total as the purity of the magnesium metaphosphate.
- the way of finding is as follows. 1.0 g of the obtained magnesium metaphosphate powder was weighed into a Teflon (registered trademark) container, and 10 ml of a 20% NaOH solution was added thereto. (MLS 1200 MEGA), concentrated hydrochloric acid 1 0 ml was added and the treatment was carried out again with a microwave decomposition apparatus. The obtained solution was transferred to a 100 ml measuring flask, and deionized water was added up to the marked line. This solution (hereinafter, determine the purity of each with the referred to as A>.
- the content of M g O and P 2 O 5 is measured in the following manner. (1) The content of M g O
- MgO (%) (B-A) x— xfx 40.3045
- A represents the titer (ml) of the test solution
- B represents the titer of the blank test (ml)
- f represents the factor of the magnesium standard solution
- 40.3045 represents the molecular weight of magnesium oxide.
- g Measure the absorbance of the test solution by the following method.
- dilinoleic pentoxide standard liquid 1 as a control liquid
- determine the absorbance of the test liquid and dilinoleic pentoxide standard liquid 2 and calculate the content of niline pentoxide from the following formula.
- A is the absorbance of the second phosphorus standard solution
- B is the absorbance w of the test solution
- C represents the weight of P contained in the first phosphorus standard solution
- S represents the weight of the sample.
- the phosphorous pentoxide standard solution is prepared by the following method. 0.4 58 mg gZm l Diphosphorus pentoxide solution Take 100 ml of each 17 ml in a 100 ml volumetric flask, and add 50 ml of pure water. While stirring, add 20 ml of the color developing solution, make up to the mark at a pure volume, and let stand for 30 minutes. The resulting solutions were each diluted with diphosphorus pentoxide standard solution 1 (containing 0.0733 mg Znl of pentyl pentoxide) and diphosphorus pentoxide standard solution 2 (with 0.0779 mggZml). (Incl. Diphosphorus pentoxide). CP 2 ⁇ S ZM g O molar ratio)
- the high-purity metal phosphate of the present invention has a low content of impurities composed of various colored metal elements. Therefore, the high-purity phosphoric acid phosphate of the present invention can be used as a raw material for producing optical lenses for digital video cameras and digital cameras, as well as for producing high transmission glass for short-wavelength lasers for digital video disc players, and for producing amplification fibers. It is particularly preferably used as an electrolyte material for secondary batteries.
Abstract
Description
Claims
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KR1020057017090A KR101056561B1 (ko) | 2003-03-14 | 2004-03-09 | 고순도 메타인산염 및 그의 제조 방법 |
US10/548,528 US20060286021A1 (en) | 2003-03-14 | 2004-03-09 | High purity metaphosphate and method for production thereof |
JP2004553532A JP3802916B2 (ja) | 2003-03-14 | 2004-03-09 | 高純度メタリン酸塩及びその製造方法 |
KR1020117001516A KR101093353B1 (ko) | 2003-03-14 | 2004-03-09 | 고순도 메타인산염 |
DE112004000407T DE112004000407T5 (de) | 2003-03-14 | 2004-03-09 | Hochreines Metaphosphat und Methode zu seiner Herstellung |
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JP (2) | JP3802916B2 (ja) |
KR (2) | KR101056561B1 (ja) |
CN (3) | CN101037194A (ja) |
DE (1) | DE112004000407T5 (ja) |
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Cited By (5)
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CN100355647C (zh) * | 2004-12-31 | 2007-12-19 | 山西超新金属材料有限公司 | 偏磷酸锂的生产工艺 |
CN100384721C (zh) * | 2004-12-31 | 2008-04-30 | 山西超新金属材料有限公司 | 偏磷酸钡的生产工艺 |
JP2009067608A (ja) * | 2007-09-11 | 2009-04-02 | Rin Kagaku Kogyo Kk | 高純度メタリン酸アルミニウムの製造方法 |
JP2009067611A (ja) * | 2007-09-11 | 2009-04-02 | Rin Kagaku Kogyo Kk | 高純度メタリン酸アルミニウムの製造方法 |
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-
2004
- 2004-03-09 DE DE112004000407T patent/DE112004000407T5/de not_active Withdrawn
- 2004-03-09 KR KR1020057017090A patent/KR101056561B1/ko active IP Right Grant
- 2004-03-09 CN CNA2007100848133A patent/CN101037194A/zh active Pending
- 2004-03-09 US US10/548,528 patent/US20060286021A1/en not_active Abandoned
- 2004-03-09 JP JP2004553532A patent/JP3802916B2/ja not_active Expired - Lifetime
- 2004-03-09 CN CNB2007101089953A patent/CN100569635C/zh not_active Expired - Lifetime
- 2004-03-09 KR KR1020117001516A patent/KR101093353B1/ko active IP Right Grant
- 2004-03-09 CN CNB200480006982XA patent/CN100351173C/zh not_active Expired - Lifetime
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JPH0524998A (ja) * | 1991-07-22 | 1993-02-02 | Toshiba Corp | MTiOXO 4 属単結晶およびKTiOPO 4 単結晶の製造方法 |
JP2003063811A (ja) * | 2001-08-28 | 2003-03-05 | Central Glass Co Ltd | メタリン酸アルミニウムの製造方法 |
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CN100352762C (zh) * | 2004-12-31 | 2007-12-05 | 西安交通大学医学院 | 偏磷酸钙的生产工艺 |
CN100355647C (zh) * | 2004-12-31 | 2007-12-19 | 山西超新金属材料有限公司 | 偏磷酸锂的生产工艺 |
CN100384721C (zh) * | 2004-12-31 | 2008-04-30 | 山西超新金属材料有限公司 | 偏磷酸钡的生产工艺 |
JP2009067608A (ja) * | 2007-09-11 | 2009-04-02 | Rin Kagaku Kogyo Kk | 高純度メタリン酸アルミニウムの製造方法 |
JP2009067611A (ja) * | 2007-09-11 | 2009-04-02 | Rin Kagaku Kogyo Kk | 高純度メタリン酸アルミニウムの製造方法 |
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KR101093353B1 (ko) | 2011-12-14 |
CN101037194A (zh) | 2007-09-19 |
CN100569635C (zh) | 2009-12-16 |
CN1761616A (zh) | 2006-04-19 |
US20060286021A1 (en) | 2006-12-21 |
CN101066755A (zh) | 2007-11-07 |
DE112004000407T5 (de) | 2006-01-26 |
KR20050109563A (ko) | 2005-11-21 |
JP2005325023A (ja) | 2005-11-24 |
KR20110022687A (ko) | 2011-03-07 |
JP4500234B2 (ja) | 2010-07-14 |
JPWO2004080893A1 (ja) | 2006-06-22 |
TWI264414B (en) | 2006-10-21 |
JP3802916B2 (ja) | 2006-08-02 |
KR101056561B1 (ko) | 2011-08-11 |
CN100351173C (zh) | 2007-11-28 |
TW200503947A (en) | 2005-02-01 |
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