WO2007018203A1 - 高純度苛性カリの製造方法 - Google Patents
高純度苛性カリの製造方法 Download PDFInfo
- Publication number
- WO2007018203A1 WO2007018203A1 PCT/JP2006/315638 JP2006315638W WO2007018203A1 WO 2007018203 A1 WO2007018203 A1 WO 2007018203A1 JP 2006315638 W JP2006315638 W JP 2006315638W WO 2007018203 A1 WO2007018203 A1 WO 2007018203A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- caustic potash
- purity
- concentration
- aqueous solution
- producing high
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/28—Purification; Separation
- C01D1/30—Purification; Separation by crystallisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0031—Evaporation of components of the mixture to be separated by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/02—Crystallisation from solutions
Definitions
- the present invention relates to a purification method capable of obtaining high-purity caustic potash (potassium hydroxide), sodium and chlorine in caustic potash, and heavy metals such as iron, chromium and nickel. It is intended to provide a method by which high-purity caustic potash can be obtained at a low cost by a simple process.
- caustic potash is produced along with chlorine and hydrogen by electrolysis of an aqueous potassium chloride solution by an ion exchange membrane method or the like.
- the potassium hydroxide produced in this way has good purity and is used in many fields.
- This potassium potassium hydroxide is used as an indispensable inorganic chemical material in various fields such as the production of various potassium salts, pharmaceuticals, cosmetics and analytical reagents.
- high purity products from which impurities are removed are particularly necessary.
- caustic potash that contains as little sodium and impure metals as possible in order to prevent impurities from entering and contaminating silicon plates from high integration. It is said that. In alkaline batteries, etc., it is necessary to prevent deterioration of long-term stability such as voltage due to heavy metals and chloride ions in caustic potash and liquid leakage. For this reason, high-purity caustic potash products are being demanded.
- Patent Document 4 a method for increasing the purity of salty aluminum by disposing a crystallizer in series and repeating the crystallization operation in multiple stages is disclosed (for example, Patent Document 4). ).
- the purification cost in this case varies greatly depending on the yield of the purified product as well as the characteristics of the purification method.
- Patent Document 5 It is known that metal components such as iron and nickel remain on the surface of the silicon wafer when the silicon wafer is etched and change the electrical characteristics. For this reason, those having a low content are desired. For this reason, a filter device pre-coated with activated carbon has been disclosed to reduce the nickel content to 0.05 ppm or less (eg, Patent Document 5). In addition, there has been disclosed a method in which caustic soda is brought into contact with activated carbon that has been activated by immersion treatment in nitric acid to reduce the iron content to 200 ppb or less and the nickel content to 20 ppb or less (for example, Patent Document 6).
- Patent Document 1 Japanese Patent Publication No. 3-060605
- Patent Document 2 Japanese Patent Publication No. 5-082328
- Patent Document 3 Japanese Patent Laid-Open No. 2002-317286
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2004-203713
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-203828
- Patent Document 6 Japanese Unexamined Patent Application Publication No. 2005-001955
- An object of the present invention is to provide a production method capable of obtaining high-purity caustic potash by a relatively simple method in response to the above-described demand for high-purity caustic potash.
- the present invention (1) Based on a caustic potash concentration of 48%, a caustic potash aqueous solution containing a sodium content of 200 mgZkg or less and a chlorine content of 15 mgZkg or less in terms of potassium chloride is concentrated at high temperature to precipitate caustic potash monohydrate crystals. And isolating the crystals from the slurry containing the monohydrate crystals,
- caustic potash aqueous solution uses a caustic potash concentration of 48% as a reference and a chlorine content exceeding lmgZkg in terms of potassium chloride.
- the high-purity caustic potash obtained by the production method of the present invention By using the high-purity caustic potash obtained by the production method of the present invention, the required performance of the silicon wafer after chemical mechanical polishing can be satisfied, and the stability of voltage such as an alkaline battery can be stabilized. Liquid leakage can be prevented.
- FIG. 1 is a schematic view of an apparatus to which the method for producing high purity caustic potash of the present invention is applied.
- FIG. 1 is a schematic diagram showing the steps of a method for producing high purity caustic potash in the present invention.
- the pre-concentrator 1 is heated by steam 3 to evaporate water through the decompression line.
- the concentrated product (concentration 1) is introduced into the crystallizer 4 with a stirrer.
- the crystallizer 4 with a stirrer is heated by steam 3, and water is evaporated from the concentrated 1 through a vacuum line and concentrated.
- Caustic potash monohydrate crystals (for example, particle size of about 1 to 2 mm) are precipitated in the crystallizer 4 and concentrated to an appropriate slurry concentration.
- the slurry is extracted into the centrifuge 5.
- the centrifuge 5 separates the crystal 7 from the mother liquor 8.
- the crystals in the centrifuge 5 are rinsed with the rinsing solution 6 to wash the mother liquor attached around the crystals.
- the crystal 7 after rinsing may be used as a crystal product that may be dissolved in the high-purity caustic potash crystal dissolution tank 9 to a necessary concentration.
- the dissolution concentration of caustic potash is about 49-57% for higher concentration due to power use, which is mostly diluted to 48-49% in circulation, or for further purification. May dissolve.
- FIG. 11 to 18 in FIG. 1 are devices for generating a reduced pressure.
- the water vapor generated from the crystallizer 4 is brought into contact with the low-temperature cooling water 11 in the vapor condenser 12 and condensed.
- This condensed water can be put into the low-temperature cooling water receiving tank 13 and circulated and reused as low-temperature cold water 11 using a refrigerator or the like.
- further purification can be achieved by repeating the above-described purification operation.
- a plurality of crystallizers with a stirrer can be prepared, and caustic potash purified to high purity by multistage refining can be obtained. That is, the caustic potash solution obtained in the caustic potash crystal dissolution tank 9 may be sent to the next concentrator or crystallizer.
- further purification can be performed by once removing the liquid in the crystallizer 4 system and using the caustic potash crystal dissolution tank 9 solution once purified as the raw material 2.
- the impurity concentration of the mother liquor or rinsing solution is below the specified value, it can be mixed into the raw material 2 and reused.
- High purity caustic potash has various impurity concentration standards for various applications.
- the handling concentration of high purity caustic potash depends on various applications.
- the caustic potash concentration is described as being converted to 48%. Impurity concentration is also converted to this 48% caustic potash concentration.
- the high-purity caustic potash obtained by the production method of the present invention is 1OmgZkg or less in sodium and chlorine is 1mgZkg or less in terms of potassium chloride. It is considered that sodium exists as sodium ions (ie, forms such as NaOH and NaCl), and chlorine exists as chloride ions (ie, forms such as KC1 and NaCl).
- values converted into sodium that is, converted as a sodium atom
- sodium chloride potassium were used. That is, Na is 10 mgZkg, KC1 is lmgZkg, and caustic potash concentration is 48%. Na is 20 mgZkg, KC1 is 2 mgZkg, and caustic potash concentration is 96%.
- the concentration of caustic potash is often handled in the range of 20 to 99%, and 40% to 57% liquid products and 95 to 98% solid products are widely distributed in the market. It is particularly preferable that the high purity caustic potash of the present invention is provided in these forms.
- caustic potash In refining caustic potash, various refining efficiencies were compared, and the method of directly purifying caustic potash was the most efficient, and there was a method of depositing a slurry containing caustic potash monohydrate crystals at a high temperature caustic potash aqueous solution. It turned out to be the most efficient.
- a caustic potash aqueous solution having a sodium content of 2 OOmgZkg or less and a chlorine content of 15mgZkg or less in terms of KC1 based on a 48% caustic potash concentration aqueous solution.
- a caustic potash aqueous solution having a sodium content of more than 200 mgZkg and a Z or chlorine content of more than 15 mgZkg in terms of KC1 is used as a raw material, the intended high purity caustic potash cannot be obtained or further purification is performed. This is not preferable because it may be necessary to perform an operation.
- the raw materials have a sodium content of more than lOmgZkg and / or a chlorine content of more than lmg / kg in terms of KC1.
- the iron content in the high-purity caustic potash of the present invention is not less than lppb with respect to the value obtained by converting the caustic potash concentration to 48% (hereinafter, the value obtained when the caustic potash concentration is converted to 48%). 50 ppb or less is preferred, more preferably 20 ppb or less, and even more preferably 15 ppb or less. When the iron content in the caustic power is within this range, the performance required in the field of electronic materials and the like can be satisfied.
- the chromium content in the high-purity caustic potash of the present invention is 0.1 lppb or more, 20 ppb or less, more preferably lOppb or less, and further preferably 5 ppb or less. Chrome content in caustic potash S Within this range, performance required in the field of electronic materials can be satisfied.
- the nickel content in the high purity caustic potash of the present invention is not less than 0.1 lppb, preferably not more than lOppb, more preferably not more than 5 ppb, and still more preferably not more than 4 ppb. When the nickel content in caustic potash is within this range, performance required in the field of electronic materials can be satisfied.
- the copper content in the high purity caustic potash of the present invention is 0.1 lppb or more and lOppb or less, more preferably 5 ppb or less. If the copper content in caustic potash is within this range, the performance required in the field of electronic materials can be satisfied.
- the zinc content in the high purity caustic potash of the present invention is not less than lppb and preferably not more than 20 ppb, more preferably not more than 15 ppb. If the zinc content in caustic potash is within this range, the performance required in the field of electronic materials can be satisfied.
- the high purity caustic potash of the present invention has an iron content of 50 ppb or less and a chromium content of 20 ppb or less; a nickel content of 10 ppb or less, a copper content of 10 ppb or less, and a Z or zinc content of 20 ppb.
- the following are preferred.
- the apparatus for maintaining a high temperature state (hereinafter referred to as a crystallizer) is preferably equipped with a stirrer in order to prevent the mother liquor from being entrained due to the bonding between the produced slurries.
- the pre-concentration and the crystallizer are preferably performed under reduced pressure conditions in order to keep the handling temperature within a practical range.
- the same decompression condition or different decompression conditions may be used.
- the decompression condition differs depending on the solution temperature in the pre-concentrator and the solution temperature in the crystallizer. That is, it is desirable to concentrate to the point immediately before the crystals are generated in the force preconcentrator, which is determined in consideration of the solution temperature, the degree of vacuum, and the precipitation rate of the caustic curly hydrate crystals.
- the temperature of the caustic potash aqueous solution in the crystallizer is preferably above 70 ° C, more preferably above 90 ° C, more preferably above 95 ° C, and more preferably below 150 ° C. 120 ° C or less is preferred More preferred is 110 ° C. or less. If it is 70 ° C or lower, it is necessary to increase the degree of pressure reduction for concentrating the caustic potash aqueous solution in order to crystallize caustic potash, resulting in an increase in equipment cost and disadvantage. If it is below 90 ° C, the effect of removing impurities such as sodium may deteriorate due to problems such as bumping and vacuum line blockage. Above 150 ° C, the heating cost and expensive equipment may be used, which is not preferable.
- the caustic potash aqueous solution supplied to the crystallizer after pre-concentration is preferably substantially equal to the temperature of the crystallizer. Therefore, if the pre-concentrator and the crystallizer are at approximately the same pressure, the temperature can be achieved by the same operation.
- the caustic potash concentration in the mother liquor in the crystallizer is 57-70%, preferably 60-70%, more preferably 61-70%, 62-65%. Some are the most preferred purification conditions. If the concentration of caustic potash in the mother liquor is outside this range, removal of impurities such as sodium may be insufficient, which is not preferable. In addition, since the preferable caustic potash concentration of the mother liquor differs depending on the liquid temperature in the crystallizer, there is a preferable caustic potash concentration depending on the liquid temperature.
- the operation of the pre-concentrator is preferably performed under conditions where no slurry is generated.
- in the pre-concentrator if it is in an excessively volatile state, insoluble matter adheres to the inner wall of the gas phase portion, and this deposit falls into the solution and mixes with the slurry. Is not preferred because it may decrease. Similarly, an object may adhere to the decompression line and cause clogging, which is not preferable. If the volatilization state is weak in the pre-concentrator, the concentration becomes slow, which is not preferable because the operation efficiency is lowered. Further, since the load on the crystallizer is large, the operation efficiency may be lowered, which is preferable.
- the slurry concentration in the crystallizer is preferably 5 to 40%, more preferably 10 to 35% 1 5-30% is more preferable. If the slurry concentration is more than 40%, the viscosity becomes too high, and it may not be possible to smoothly remove the slurry liquid from the crystallizer. On the other hand, if it is less than 5%, the amount of crystals is small and the efficiency is deteriorated.
- the average residence time in the crystallizer is preferably 1 hour or longer, more preferably 2 hours or longer. Also, less than 6 hours is preferable, less than 5 hours, and further preferably less than 3 hours. An average residence time in the crystallizer of less than 1 hour is not preferable because impurities may be incorporated into the monohydrate crystals. If the SV in the crystallizer exceeds 6Hr, the production efficiency will deteriorate, which is preferable.
- a known vacuum generator can be used.
- a steam condenser may be used in order to increase the capacity of the vacuum generator.
- a steam type ejector and a vacuum pump can be applied, and the structure should not suffer from troubles such as damage to the equipment due to caustic caliper during concentration and pipe clogging with mist due to long-term accumulation of use. Can do.
- any material can be used as long as it is not corroded by a caustic potash aqueous solution, and a nickel material, a silver material, a gold material, and a high nickel content stainless steel can be used.
- Nres, polytetrafluoroethylene, polysulfone or the like is preferably used as the corrosion resistance. These materials can also be used in combination. Polytetrafluoroethylene or polysulfone may be used as it is or as this coating material. Preferably, it is used as a coating material.
- the material used in the crystallizer is more preferably nickel, considering the mechanical strength, heat transfer and corrosion resistance during pressure reduction.
- nickel material and the alloy that contains various alloys as shown in the IS standard. Alloys containing nickel with a strength of 80% or more and pure nickel (for example, those that meet the JISH4551 standard). High nickel-containing stainless steel is a stainless alloy containing 30% or more and less than 80% nickel.
- a pre-concentrator it is preferable to attach a pre-concentrator to the crystallizer used in the production method of the present invention in order to reduce the operation load of the crystallizer and to simplify this shape.
- Any material can be used for the pre-concentrator as long as it is not corroded by the caustic potash aqueous solution, and preferably stainless steel containing 15% or more of nickel such as SUS310S. Alloy, nickel material, polytetrafluoroethylene or polysulfone, and more preferably stainless steel alloy or nickel material containing 30% or more of nickel.
- Polytetrafluoroethylene or polysulfone may be used as it is or as a coating material, and is preferably a coating material.
- polyethylene, polypropylene, etc. can be used as the material of the object.
- These synthetic resins can be used as coating materials.
- the slurry generated in the crystallizer is subjected to a solid-liquid separation operation to be separated into a crystal and a mother liquor.
- a solid-liquid separation operation In order to increase the purity, it is very important to remove the mother liquor attached around the crystal. This is because the smaller the difference in impurity concentration between the crystal and the mother liquor, the greater the effect of even a small amount of adhesion on the final purified product.
- the separated crystals are preferably rinsed with water or a caustic potash aqueous solution. Any water or caustic potash aqueous solution may be used as long as it does not reduce the purity of the resulting high purity caustic potash.
- caustic potash aqueous solution examples include a high-purity caustic potash aqueous solution.
- the ability to improve the quality of caustic potash obtained by rinsing is not preferable because the amount of liquid to be rinsed is too large because the yield decreases.
- the amount of water to be rinsed is preferably 1Z3 to 1Z100 times, more preferably 1Z10 to 1Z30 times, more preferably 1Z3 to lZ200 times the amount of crystals obtained. If the amount to be rinsed is more than 1Z3 times, loss due to crystal dissolution is large, which is not preferable. If the amount to be rinsed is less than 1Z200 times, the rinsing effect may not be obtained.
- the crystal after rinsing may be used as a strength aqueous solution that can be dried and used as a crystal. In the production method of the present invention, it is preferable to take it out as an aqueous solution.
- the water to be prepared as a high purity caustic potash aqueous solution include ion-exchanged water, ultrapure water, and reverse osmosis membrane water, which are not particularly reduced, and are preferred. Or ultrapure water or reverse osmosis membrane water.
- the mother liquor may be used by mixing with a caustic potash aqueous solution used as a raw material. However, if the mother liquor is recycled, the amount of impurities in the raw material will increase.
- the impurity concentration in the mother liquor it is preferable to measure the impurity concentration in the mother liquor and stop mixing the mother liquor into the raw material when it exceeds a predetermined value. That is, since a part of the mother liquor is reused as a raw material liquid, it is sufficient if there are fewer impurities than the raw material. This operation can increase the effect of reducing the pre-concentration energy and the raw material recovery rate when the mother liquor has a higher caustic potash concentration than the raw material. If only the impurities to be purified are considered, for example, when the iron concentration in the mother liquor exceeds 500 ppb, the handling may be such that the recycling of the mother liquor is stopped. In addition, it is acceptable to use sodium concentration, chlorine concentration, copper concentration, nickel concentration, zinc concentration, etc. as a recycling index.
- the liquid in which the crystal is rinsed may also be mixed in a caustic potash aqueous solution used as a raw material or may be used in a crystallizer having a concentration function. In this case, the same operation as in the mother liquor recycle is performed.
- High-purity caustic potash with an iron content of 50ppb or less, a chromium content of 20ppb or less, sodium of lOmgZkg or less, and chlorine of lmgZkg or less in terms of salt and potassium, based on 48% caustic potash as the standard.
- the caustic potash aqueous solution is concentrated at a high temperature to precipitate caustic potash monohydrate crystals, the slurry-powered crystals containing the monohydrate crystals are separated from the mother liquor, and the crystals are rinsed with water or caustic solution.
- a method for producing high-purity caustic potash characterized by the above.
- Caustic potash aqueous solution is concentrated to 57-70% caustic potash concentration at a temperature above 70 ° C and below 150 ° C to precipitate caustic potash monohydrate crystals.
- a method for producing high-purity caustic potash characterized by separating the mother liquor and rinsing the crystals with water or an aqueous caustic potash solution.
- Caustic potash aqueous solution containing sodium content of 200 mgZkg or less and chlorine content of 15 mgZkg or less in terms of salt and potassium based on caustic potash concentration of 48% is over 70 ° C.
- a method for producing high-purity caustic potash characterized by the above.
- a caustic potash solution containing a sodium content of 200 mgZkg or less and a chlorine content of 15 mgZkg or less in terms of salt and potassium is concentrated at a high temperature to a caustic potash concentration of 57-70%.
- a method for producing high-purity caustic potash characterized by precipitating monohydrate crystals, separating a slurry force crystal component containing the monohydrate crystals and a mother liquor, and rinsing the crystal component with water or an aqueous caustic potash solution.
- caustic potash concentration with a sodium content of 200 mgZkg or less and a chlorine content of 15 mgZkg or less in terms of salt and potassium with a caustic potash concentration of 48% as the standard is caustic potash concentration at temperatures above 70 ° C and below 150 ° C.
- the caustic potash monohydrate crystals are precipitated by concentrating to 57-70%, the slurry force crystals containing the monohydrate crystals are separated from the mother liquor, and the crystals are rinsed with water or an aqueous caustic potash solution.
- a method of producing high-purity caustic potash that is characterized.
- the caustic potash aqueous solution is concentrated at a high temperature to precipitate caustic potash monohydrate crystals, the slurry-powered crystals containing the monohydrate crystals are separated from the mother liquor, and the crystals are rinsed with water or caustic solution.
- the material of the container for depositing the slurry containing the caustic potash monohydrate crystal is nickel, silver, gold, high nickel-containing stainless steel, polysulfone and Z or polytetrafluoroethylene.
- a caustic potash aqueous solution containing a sodium content of 200 mgZkg or less and a chlorine content of 15 mgZkg or less in terms of potassium chloride is concentrated in a high temperature state to precipitate caustic potash monohydrate crystals.
- the material of the container in which the slurry containing the monohydrate crystal of caustic potassium is precipitated by separating the crystal component and the mother liquor from the slurry containing the monohydrate crystal and rinsing the crystal component with water or a caustic potash aqueous solution. Is nickel material
- a method for producing high-purity caustic potash characterized by being made of silver, gold, stainless steel with high nickel content, polysulfone, and Z or polytetrafluoroethylene.
- a method for producing high-purity caustic potash characterized by being made of gold, stainless steel containing high nickel, polysulfone and z or polytetrafluoroethylene.
- a caustic potash aqueous solution containing a sodium content of 200 mgZkg or less and a chlorine content of 15 mg / kg or less in terms of salt and potassium, with a caustic potash concentration of 48% by weight as a reference, is above 70 ° C and below 150 ° C.
- Caustic potash monohydrate crystals are precipitated by precipitating a slurry containing caustic potash monohydrate crystals, separating the crystals and mother liquor from the slurry, and rinsing the crystals with water or an aqueous caustic potash solution.
- an aqueous caustic potash solution with a sodium content of 200 mgZkg or less and a chlorine content of 15 mg / kg or less in terms of salt and potassium is used.
- To precipitate a slurry containing caustic potash monohydrate crystals separating the crystal and mother liquor from the slurry, and rinsing the crystals with water or an aqueous caustic potash solution.
- a method for producing high-purity caustic potash characterized in that the material of the container for precipitating the slurry containing nickel is nickel, silver, gold, high nickel-containing stainless steel, polysulfone and Z or polytetrafluoroethylene .
- a caustic potash aqueous solution containing a sodium content of 200 mgZkg or less and a chlorine content of 15 mg / kg or less in terms of salt and potassium, with a caustic potash concentration of 48% by weight as a reference, is above 70 ° C and below 150 ° C.
- the caustic potash concentration is concentrated to 57 to 70% by weight to precipitate a slurry containing caustic monohydrate crystals, and the crystal and mother liquor are separated from the slurry, and the crystals are separated with water or a caustic potash aqueous solution.
- the container material for depositing slurry containing caustic potash monohydrate crystals should be nickel, silver, gold, stainless steel with high nickel content, polysulfone and Z or polytetrafluoroethylene.
- Chlorine was measured by spectrophotometric analysis after complex formation with mercury (II) thiocyanate and converted to potassium chloride.
- Na concentration was measured by ICP emission spectrometry after diluting with ultrapure water.
- the concentration of potassium hydroxide and potassium was determined by neutralization titration with hydrochloric acid (using methyl red and methyl blue mixed indicators as indicators).
- the concentrations of chromium, nickel, copper, and zinc were measured by ICP-MS after extraction of each metal complex with Jetildichi talented rubamic acid and extraction with n-butyl acetate.
- the iron concentration was determined by spectrophotometric analysis by isoamyl alcohol extraction after complex formation with bathophenanthroline.
- caustic potash aqueous solution (raw material) lOOOg was concentrated to a 61% caustic potash aqueous solution and placed in a tank lined with nickel material with a stirrer. Then, the caustic aqueous solution placed in the tank was concentrated by adjusting the pressure so that it boiled at 100 ° C. to obtain a slurry containing a caustic potash monohydrate crystal. From this slurry, the insoluble part was removed by centrifugation, and washed with ultrapure water of 1Z20 in the amount of this insoluble part to obtain high purity caustic curry salt crystals. The high purity caustic curry hydrate crystals were dissolved in ultrapure water to a concentration of 48.5%.
- caustic potash aqueous solution (raw material) containing lOOOg containing 196ppm sodium and 1.Oppm chlorine in terms of potassium chloride.
- Lee water crystal was obtained.
- An analysis was conducted in the same manner as in Example 1 on a high-purity caustic potash aqueous solution in which monohydrate crystals were dissolved in ultrapure water. The results obtained are shown in Table 1.
- caustic potash aqueous solution containing 860ppm sodium and 29ppm chlorine as potassium chloride Concentrated to 60% lOOOg, put in the same tank as described in Example 1, and boiled at 80 ° C The slurry was adjusted by adjusting the pressure so as to become caustic potash and precipitated a caustic potash crystal. From this slurry, the insoluble part was removed by centrifugation and washed with 1 Z 100 of ultrapure water of this insoluble part to obtain caustic potash. This caustic potash analysis was performed and the results are shown in Table 1.
- Examples 1 and 2 from Table 1 can provide highly purified caustic potash with high yield.
- Comparative Example 1 is a product obtained by treating almost the same raw material by a different method, but the degree of purification as in Example 1 was not obtained. Furthermore, even if a raw material having a lower Na content than in Example 2 was used, sufficient purification was not obtained. From this, it can be seen that the production method of the present invention is superior regardless of whether the purity is high or the yield is high.
- the production method of the present invention can remove chlorine present at the same time to a higher degree, and as shown in Table 2, heavy metal can be highly refined.
- a mother liquor and a rinsing liquid were obtained in the same manner as in Example 1.
- the mother liquor and rinse solution were analyzed for concentration and impurities.
- the mother liquor and the rinsing liquid were concentrated and introduced into the crystallizer as raw materials to obtain high purity caustic curry hydrate crystals. Note that the mother liquor and rinse liquid may not be used as raw materials due to the results of impurity praying.
- the high-purity caustic potash obtained by the production method of the present invention can be used for battery materials, electronic materials, medical drugs, production of various potassium salts, cosmetics, analytical reagents and the like that require high purity.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007529590A JP5125509B2 (ja) | 2005-08-11 | 2006-08-08 | 高純度苛性カリの製造方法 |
EP06796317.3A EP1930296B1 (en) | 2005-08-11 | 2006-08-08 | Method for producing high purity caustic potash |
CN2006800285565A CN101238067B (zh) | 2005-08-11 | 2006-08-08 | 制备高纯度苛性钾的方法 |
US11/990,213 US7892298B2 (en) | 2005-08-11 | 2006-08-08 | Method for producing high purity caustic potash |
KR1020087003709A KR101267638B1 (ko) | 2005-08-11 | 2008-02-15 | 고순도 가성칼리의 제조 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005233666 | 2005-08-11 | ||
JP2005-233666 | 2005-08-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007018203A1 true WO2007018203A1 (ja) | 2007-02-15 |
Family
ID=37727386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/315638 WO2007018203A1 (ja) | 2005-08-11 | 2006-08-08 | 高純度苛性カリの製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7892298B2 (ja) |
EP (1) | EP1930296B1 (ja) |
JP (1) | JP5125509B2 (ja) |
KR (1) | KR101267638B1 (ja) |
CN (1) | CN101238067B (ja) |
WO (1) | WO2007018203A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015501776A (ja) * | 2011-11-17 | 2015-01-19 | ジーシー・テクノロジー・リミテッドGc Technology Limited | カリ化合物を精製および回収する相互接続システムおよび方法 |
WO2016121011A1 (ja) * | 2015-01-28 | 2016-08-04 | 株式会社日立製作所 | 蒸留装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101643222B (zh) * | 2008-08-07 | 2012-03-21 | 友发化工股份有限公司 | 将富含硅杂质的氢氧化钾水溶液纯化的方法 |
JP7252465B2 (ja) | 2019-10-10 | 2023-04-05 | 日本製鉄株式会社 | 溶融金属めっき装置 |
CN112169366B (zh) * | 2020-10-26 | 2021-12-17 | 宿迁林通新材料有限公司 | 一种化工结晶器 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62100409A (ja) * | 1985-10-28 | 1987-05-09 | Toagosei Chem Ind Co Ltd | 高純度苛性カリの製造法 |
JPH01246124A (ja) * | 1988-03-29 | 1989-10-02 | Toagosei Chem Ind Co Ltd | 高純度苛性カリの製造方法 |
JP2000203828A (ja) * | 1998-12-28 | 2000-07-25 | Toagosei Co Ltd | 苛性カリ中のニッケルの除去方法 |
JP2005001955A (ja) * | 2003-06-13 | 2005-01-06 | Asahi Kasei Chemicals Corp | 高純度苛性ソーダ水溶液の製造方法およびそれに使用する活性炭の賦活方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01246125A (ja) | 1988-03-29 | 1989-10-02 | Toagosei Chem Ind Co Ltd | 高純度苛性カリの製造方法 |
JP4517530B2 (ja) | 2001-04-19 | 2010-08-04 | 旭硝子株式会社 | 水酸化カリウム水溶液の製造方法 |
JP4309648B2 (ja) | 2002-12-26 | 2009-08-05 | 三谷産業株式会社 | 高純度塩化アルミニウムの製造方法および高純度塩化アルミニウムの製造装置 |
EP1645680A4 (en) | 2003-07-10 | 2009-07-01 | Namx Co Ltd | POCKET CUTTING DEVICE, POCKET CUTTING METHOD AND CLOTH CUTTING AND STACKING METHOD |
-
2006
- 2006-08-08 JP JP2007529590A patent/JP5125509B2/ja active Active
- 2006-08-08 WO PCT/JP2006/315638 patent/WO2007018203A1/ja active Application Filing
- 2006-08-08 CN CN2006800285565A patent/CN101238067B/zh active Active
- 2006-08-08 EP EP06796317.3A patent/EP1930296B1/en active Active
- 2006-08-08 US US11/990,213 patent/US7892298B2/en active Active
-
2008
- 2008-02-15 KR KR1020087003709A patent/KR101267638B1/ko active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62100409A (ja) * | 1985-10-28 | 1987-05-09 | Toagosei Chem Ind Co Ltd | 高純度苛性カリの製造法 |
JPH01246124A (ja) * | 1988-03-29 | 1989-10-02 | Toagosei Chem Ind Co Ltd | 高純度苛性カリの製造方法 |
JP2000203828A (ja) * | 1998-12-28 | 2000-07-25 | Toagosei Co Ltd | 苛性カリ中のニッケルの除去方法 |
JP2005001955A (ja) * | 2003-06-13 | 2005-01-06 | Asahi Kasei Chemicals Corp | 高純度苛性ソーダ水溶液の製造方法およびそれに使用する活性炭の賦活方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1930296A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015501776A (ja) * | 2011-11-17 | 2015-01-19 | ジーシー・テクノロジー・リミテッドGc Technology Limited | カリ化合物を精製および回収する相互接続システムおよび方法 |
WO2016121011A1 (ja) * | 2015-01-28 | 2016-08-04 | 株式会社日立製作所 | 蒸留装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1930296A1 (en) | 2008-06-11 |
US7892298B2 (en) | 2011-02-22 |
EP1930296B1 (en) | 2014-06-04 |
CN101238067A (zh) | 2008-08-06 |
JPWO2007018203A1 (ja) | 2009-02-19 |
EP1930296A4 (en) | 2013-01-16 |
US20090110629A1 (en) | 2009-04-30 |
KR20080036093A (ko) | 2008-04-24 |
JP5125509B2 (ja) | 2013-01-23 |
CN101238067B (zh) | 2012-03-28 |
KR101267638B1 (ko) | 2013-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5125509B2 (ja) | 高純度苛性カリの製造方法 | |
CN112786988B (zh) | 一种锂电池报废正极材料回收过程中的除杂和处理方法 | |
CN111170378A (zh) | 一种粗硫酸镍精制电池级硫酸镍的工艺方法 | |
JP5032400B2 (ja) | ニッケル酸化物 | |
US20240309489A1 (en) | Process And System For Recovering Lithium From Lithium-Ion Batteries | |
JP2007045679A (ja) | 低重金属の高純度苛性カリおよびその製造方法。 | |
JP4781374B2 (ja) | 無機塩含有廃液の処理方法および装置 | |
JP2007045678A (ja) | 高純度苛性カリを製造するための容器 | |
RU2514941C2 (ru) | Способ получения чистого перрената аммония | |
JP4275939B2 (ja) | タンタル化合物及び/又はニオブ化合物の回収方法 | |
CN114480853A (zh) | 一种强碱溶液除铝的方法和应用 | |
TWI269781B (en) | Purification method for producing high purity niobium compound and/or tantalum compound | |
JP4866448B2 (ja) | 無機塩含有廃液の処理方法および装置 | |
CN219585937U (zh) | 一种boe废液的资源化处理系统 | |
WO2003072503A1 (fr) | Procédé de purification d'un composé de niobium et/ou de tantale | |
JP4322008B2 (ja) | タンタル化合物及び/又はニオブ化合物の回収方法 | |
JP7531909B2 (ja) | 塩化鉄(ii)の高純度化方法 | |
CN104140129B (zh) | 粗制氢氧化镍分离提纯方法以及得到的产品 | |
WO2023286684A1 (ja) | 硫酸リチウムおよび遷移金属硫酸塩の製造方法 | |
JP4505952B2 (ja) | 高純度塩化第二鉄水溶液の製造法 | |
JP5373867B2 (ja) | ニッケル酸化物の製造方法 | |
JPH09235684A (ja) | エッチング廃液の再生処理方法 | |
JPH01246124A (ja) | 高純度苛性カリの製造方法 | |
CN118387903A (zh) | 从沉锂母液中回收碳酸锂及元明粉的方法、碳酸锂、元明粉及用途 | |
TWI398412B (zh) | Process and apparatus for treating waste liquid containing inorganic salt |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680028556.5 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007529590 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11990213 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087003709 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006796317 Country of ref document: EP |