WO2023084917A1 - イオン交換されたハイドロタルサイトの製造方法 - Google Patents
イオン交換されたハイドロタルサイトの製造方法 Download PDFInfo
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- WO2023084917A1 WO2023084917A1 PCT/JP2022/034809 JP2022034809W WO2023084917A1 WO 2023084917 A1 WO2023084917 A1 WO 2023084917A1 JP 2022034809 W JP2022034809 W JP 2022034809W WO 2023084917 A1 WO2023084917 A1 WO 2023084917A1
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- hydrotalcite
- acid
- mass
- ion
- production method
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- 229960001545 hydrotalcite Drugs 0.000 title claims abstract description 140
- 229910001701 hydrotalcite Inorganic materials 0.000 title claims abstract description 140
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 title claims abstract description 126
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 68
- 239000002253 acid Substances 0.000 claims abstract description 66
- 239000007864 aqueous solution Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 235000011837 pasties Nutrition 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims description 43
- -1 inorganic acid salts Chemical class 0.000 claims description 26
- 239000000376 reactant Substances 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 16
- 238000010298 pulverizing process Methods 0.000 claims description 12
- 229910021645 metal ion Inorganic materials 0.000 claims description 11
- 150000001450 anions Chemical class 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000011260 aqueous acid Substances 0.000 claims description 9
- 150000007522 mineralic acids Chemical class 0.000 claims description 6
- 150000007524 organic acids Chemical class 0.000 claims description 6
- 235000005985 organic acids Nutrition 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 51
- 239000006227 byproduct Substances 0.000 abstract description 21
- 239000007795 chemical reaction product Substances 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000004140 cleaning Methods 0.000 abstract description 5
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000011369 resultant mixture Substances 0.000 abstract 1
- 238000005342 ion exchange Methods 0.000 description 57
- 239000000126 substance Substances 0.000 description 43
- 238000006243 chemical reaction Methods 0.000 description 30
- 238000012360 testing method Methods 0.000 description 27
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 17
- 239000000203 mixture Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 17
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 15
- 239000002002 slurry Substances 0.000 description 15
- 238000003756 stirring Methods 0.000 description 15
- 239000000843 powder Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 235000010724 Wisteria floribunda Nutrition 0.000 description 12
- 239000011777 magnesium Substances 0.000 description 11
- 238000013329 compounding Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 7
- 229910017604 nitric acid Inorganic materials 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 238000001354 calcination Methods 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 238000000975 co-precipitation Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000013019 agitation Methods 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000009257 reactivity Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000006557 surface reaction Methods 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910020068 MgAl Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 235000015165 citric acid Nutrition 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 150000003751 zinc Chemical class 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 description 1
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 235000011087 fumaric acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- QFWPJPIVLCBXFJ-UHFFFAOYSA-N glymidine Chemical compound N1=CC(OCCOC)=CN=C1NS(=O)(=O)C1=CC=CC=C1 QFWPJPIVLCBXFJ-UHFFFAOYSA-N 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229940071870 hydroiodic acid Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 235000011044 succinic acid Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
- C01F7/784—Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions
- C01F7/785—Hydrotalcite
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/20—Two-dimensional structures
- C01P2002/22—Two-dimensional structures layered hydroxide-type, e.g. of the hydrotalcite-type
Definitions
- the present invention relates to a method for producing ion-exchanged hydrotalcite.
- hydrotalcite hydrotalcite compounds
- a general method for ion-exchanging hydrotalcite that is, as a general method for producing ion-exchanged hydrotalcite, three methods are known: a reconstruction method, an ion-exchange method, and a coprecipitation method.
- An appropriate method is selected according to the combination of hydrotalcite as a host substance and a guest substance (substance to be intercalated).
- the restructuring method is a thermal decomposition product obtained by previously calcining hydrotalcite at a high temperature to desorb at least a part of carbonic acid and inter-layer water from the hydrotalcite, and dissolving it in a solvent such as water.
- the guest substance is incorporated between the layers when the pyrolyzate returns to hydrotalcite by coexisting with the guest substance.
- a step of calcining hydrotalcite at a high temperature a step of allowing a thermal decomposition product of hydrotalcite to coexist with a guest substance in a solvent such as water to react the two, and a step of producing a solid reaction product.
- the method includes a step of separating from the reaction solution, and a step of drying and pulverizing the separated solid reaction product.
- the ion exchange method is a method of intercalating the guest substance between the hydrotalcite layers by mixing the hydrotalcite and the anionic guest substance in a solvent. Specifically, a step of suspending hydrotalcite in a solvent, a step of dropping a solution containing an anionic guest substance into the suspension (slurry) of hydrotalcite to react them, A method comprising the steps of separating a reaction product from a reaction solution, and drying and pulverizing the separated solid reaction product.
- a carbonate ion-type layered double hydroxide (LDH) is used as a starting material, and simple and rapid decarboxylation is performed using a small amount and type of reagent.
- LDH carbonate ion-type layered double hydroxide
- a method has been proposed in which an ion reaction is carried out to produce LDH with excellent anion exchange properties while maintaining the crystal shape, crystal structure and crystallinity.
- a solution of a divalent metal ion salt and a solution of a trivalent metal ion salt, which are raw materials of hydrotalcite are added dropwise to a liquid in which a guest substance is dissolved or suspended in water.
- a cleaning process for removing the "by-products, etc.” is indispensable, and measures such as equipment for the cleaning process and waste liquid treatment were required.
- the present invention is a method for producing ion-exchanged hydrotalcite, which does not involve complicated steps and does not require large-scale equipment, while suppressing the formation of by-products and the like.
- An object of the present invention is to provide a novel production method capable of ion exchange.
- the present inventors have found that when hydrotalcite (host substance) and guest substance are mixed, contact opportunities between ions on the host substance side and ions on the guest substance side are increased. It has been found that by limiting the water content within a specific range to the extent that it can be ensured, hydrotalcite can be sufficiently ion-exchanged while suppressing the formation of by-products and the like.
- the present invention has been completed based on such findings, and includes at least the following aspects.
- One aspect (aspect 1) of the present invention is a method for producing ion-exchanged hydrotalcite, comprising: a first step of mixing and reacting powdery or pasty hydrotalcite and an acid aqueous solution so that the water content after mixing is in the range of 10 to 60% by mass; a second step of drying and pulverizing the reactant obtained in the first step without a washing step;
- the manufacturing method characterized by comprising:
- the production method of this aspect 1 includes a first step of mixing and reacting powdery or pasty hydrotalcite and an acid aqueous solution so that the water content after mixing is in the range of 10 to 60% by mass.
- a first step of mixing and reacting powdery or pasty hydrotalcite and an acid aqueous solution so that the water content after mixing is in the range of 10 to 60% by mass.
- the production method of the present embodiment 1 requires an equivalent amount of the guest substance with respect to the target ion exchange amount. (that is, the required amount of guest substance is equal to the desired amount of ion exchange), it is easy to control the amount of ion exchange, and an excess amount of guest substance and organic solvent residues are less likely to be generated, resulting in a reduction in the environmental load and an advantage in terms of production costs.
- the production method of this aspect 1 is also capable of ion-exchanging water-insoluble anions, it also has the advantage of being able to produce various special products according to various uses.
- the powdery or paste-like hydrotalcite is hydrotalcite represented by the following formula (1).
- M 2+ is a divalent metal ion
- M 3+ is a trivalent metal ion
- a n ⁇ represents an n-valent anion
- x represents a number that satisfies 0.18 ⁇ x ⁇ 0.4
- n represents an integer of 1 to 4
- m represents a number that satisfies 0 ⁇ m ⁇ 5.
- the production method of aspect 2 suppresses the generation of by-products and the like, and sufficiently Since ion exchange can be performed on
- M 2+ in the formula (1) is at least one metal ion selected from Mg 2+ and Zn 2+ , and M 3+ is Al 3+ .
- Still another aspect (Aspect 4) of the present invention is characterized in that, in the production method of Aspect 2 or 3, A n- in the formula (1) is CO 3 2- .
- the powdery or paste-like hydrotalcite is the above-mentioned specific hydrotalcite, and the anion contained between the layers of the hydrotalcite is gasified (as carbon dioxide gas) after ion exchange and removed. Therefore, by-products and the like can be made less likely to be generated more easily, and the cleaning process and the like can be more reliably eliminated.
- the water content of the powdery or paste-like hydrotalcite is in the range of 0 to 60% by mass. It is characterized by
- the water content of the powdery or paste-like hydrotalcite is in the range of 0 to 60% by mass, it is difficult for slurry to occur and the viscosity to decrease, and the first step can be better mixed.
- the acid contained in the aqueous acid solution comprises an inorganic acid, an inorganic acid salt, an organic acid, and an organic acid salt. It is characterized by being at least one acid selected from the group.
- the water content of the acid aqueous solution is in the range of 10 to 70% by mass.
- the water content of the acid aqueous solution is 10% by mass or more, so that the reactivity can be suppressed to a certain level or less so that the surface reaction with the particles can be prevented preferentially. , salt by-products and particle aggregation can be made more difficult to occur. Moreover, since the water content of the acid aqueous solution is 70% by mass or less, a certain level of reactivity can be ensured, so that the ion exchange reaction can be carried out more reliably.
- the first step includes adding the acid aqueous solution to the powdery or paste-like hydrotalcite. and the charging rate of the acid aqueous solution is 0.5 to 710% by mass/minute with respect to the mass of hydrotalcite.
- the acid aqueous solution is added at a rate within the specific range described above, thereby ensuring a certain level of productivity and preventing preferential surface reaction with the particles. Therefore, it is possible to further reduce the occurrence of salt by-products and particle aggregation.
- hydrotalcite can be sufficiently ion-exchanged while suppressing the generation of by-products, etc., without requiring complicated steps and large-scale equipment that are indispensable in conventional methods. can do.
- FIG. 1 is a schematic diagram for explaining the ion exchange reaction between hydrotalcite as a host substance and acid as a guest substance in the first step of the production method of the present invention.
- the production method of the present invention includes a first step of mixing and reacting powdery or pasty hydrotalcite and an acid aqueous solution so that the water content after mixing is in the range of 10 to 60% by mass; and a second step of drying and pulverizing the reactant obtained in the first step without washing.
- the production method of the present invention in the first step, powdery or paste-like hydrotalcite and an acid aqueous solution are mixed and reacted so that the water content after mixing is in the range of 10 to 60% by mass.
- the hydrotalcite calcination process, the filtration process, and the washing process after the reaction which are indispensable in the conventional reconstruction method, ion exchange method, and coprecipitation method, and large-scale equipment are not required.
- the hydrotalcite can be sufficiently ion-exchanged while suppressing the formation of by-products and the like.
- the production method of the present invention uses an equivalent amount of guest substance with respect to the target ion exchange amount. Since sufficient ion exchange can be performed (that is, the required guest substance is the same amount as the target ion exchange amount), the ion exchange amount is easy to control, and an excess amount of guest substance or The organic solvent residue is less likely to occur, and as a result, the environmental load can be reduced, and there is an advantage that the production cost is also excellent.
- the production method of the present invention also enables ion exchange of water-insoluble anions, so it also has the advantage of being able to produce various special products for various uses.
- the first step is performed according to the following procedure. That is, a predetermined amount of powdery or paste-like hydrotalcite is supplied into a reaction vessel equipped with an arbitrary stirring means, and a predetermined amount of acid aqueous solution is added thereto while stirring to obtain the contents of the reaction vessel. By mixing the substances for a predetermined time, hydrotalcite as a host substance and an acid as a guest substance undergo an ion exchange reaction. In this first step, the water content of hydrotalcite is adjusted so that the water content of the mixture of hydrotalcite and acid aqueous solution is within the range of 10 to 60% by mass relative to the total mass (100% by mass) of the mixture.
- the water content after mixing the powdery or pasty hydrotalcite and the acid aqueous solution is preferably in the range of 20 to 60% by mass.
- the water content after mixing is in the range of 10 to 60% by mass
- the amount of water contained in the mixture is 10 to 60% by mass with respect to the total mass (100% by mass) of the mixture.
- FIG. 1 is a schematic diagram for explaining the ion exchange reaction between hydrotalcite as a host substance and acid as a guest substance in the first step of the production method of the present invention.
- the ion exchange reaction shown in FIG. 1 is merely an example of the first step in the production method of the present invention, and the types of hydrotalcite and acid aqueous solution used in the present invention are limited to those shown in FIG. not.
- hydrotalcite 1 as a host material and acid 2 (HX) as a guest material are mixed in the presence of a specific water content of 10 to 60% by mass.
- the anion (carbonate ion; CO 3 2 ⁇ ) contained between the layers of hydrotalcite 1 and the anion (X ⁇ ) generated from the acid 2 (HX) can be ion-exchanged simply by doing so.
- ion-exchanged hydrotalcite 3 can be obtained.
- carbonate ions (CO 3 2 ⁇ ) contained between the layers of hydrotalcite 1 are removed as carbon dioxide gas (CO 2 gas) after ion exchange.
- the hydrotalcite of the host material that can be used as a raw material is not particularly limited as long as it is powdery or pasty hydrotalcite, and any known hydrotalcite can be employed.
- the pasty hydrotalcite is usually a hydrotalcite with a water content of 60% by mass or less and a predetermined viscosity and fluidity, and a slurry-like hydrotalcite with a water content of more than 60% by mass. are distinct at least by their water content.
- the powdery or paste-like hydrotalcite used as a raw material is preferably hydrotalcite represented by the following formula (1).
- M 2+ 1 ⁇ x M 3+ x (OH) 2 A n ⁇ x/n ⁇ mH 2 O (1)
- M 3+ is a trivalent metal ion
- a n ⁇ represents an n-valent anion
- x represents a number that satisfies 0.18 ⁇ x ⁇ 0.4
- n represents an integer of 1 to 4
- m represents a number that satisfies 0 ⁇ m ⁇ 5.
- the powdery or paste-like hydrotalcite used as a raw material is a highly versatile hydrotalcite represented by the above formula (1), it does not produce by-products. Since the ion exchange can be sufficiently performed while suppressing it, it is possible to realize a wide range of product designs according to various uses.
- M 2+ in the formula (1) is at least one metal ion selected from Mg 2+ and Zn 2+ , and M 3+ is Al 3+ . preferable. If the powdery or paste-like hydrotalcite used as a raw material is such a specific hydrotalcite, the above effects can be obtained more reliably.
- a more preferable combination of metal species includes MgAl, MgAlZn and ZnAl due to their high versatility in various applications, and among them, MgAl is particularly preferable.
- a n- in the above formula (1) is preferably CO 3 2- .
- the powdery or paste-like hydrotalcite used as a raw material is such a specific hydrotalcite, the anions contained between the hydrotalcite layers are gasified after ion exchange as shown in FIG. (as carbon dioxide gas), it is possible to make it more difficult to generate by-products and the like, and it is possible to more reliably eliminate the need for a cleaning process.
- the water content (that is, the water content) of the powdery or paste-like hydrotalcite is such that the water content after mixing with the acid aqueous solution can be adjusted within the range of 10 to 60% by mass.
- the upper limit of the water content in the pasty hydrotalcite is 60% by mass or less.
- the water content of the powdery or paste-like hydrotalcite is the water content in the powdery or paste-like hydrotalcite with respect to the total mass (100% by mass) of the powdery or paste-like hydrotalcite. means the mass ratio (mass%) of.
- the water content of the powdery or paste-like hydrotalcite is preferably 0% by mass or more, that is, in the range of 0 to 60% by mass, more preferably in the range of 0 to 50% by mass. It is particularly preferred to be in the range of ⁇ 10% by mass.
- the water content of the powdery or paste-like hydrotalcite is in the range of 0 to 60% by mass, it is difficult for the hydrotalcite to be slurried and the viscosity to be lowered, so that the mixing in the first step can be performed more satisfactorily. can be done.
- the acid of the guest substance is used in the form of an acid aqueous solution dissolved in water.
- the pH of the acid aqueous solution is 6 or less.
- the type of acid contained in the acid aqueous solution is not particularly limited, and any acid can be used according to the desired product quality, etc., but the group consisting of inorganic acids, inorganic acid salts, organic acids and organic acid salts At least one kind of acid selected from the above is preferable. If the acid contained in the acid aqueous solution as the guest substance is such a specific acid, the hydrotalcite can be sufficiently ion-exchanged more reliably while suppressing the formation of by-products and the like.
- the inorganic acid that can be contained in the aqueous acid solution is not particularly limited, but examples include hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, carbonic acid, boric acid, hydroiodic acid, hydrobromic acid, hydrofluoric acid, chloric acid, perchloric acid, phosphonic acid, iodic acid, sulfurous acid, chlorosulfonic acid and the like.
- examples include hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, carbonic acid, boric acid, hydroiodic acid, hydrobromic acid, hydrofluoric acid, chloric acid, perchloric acid, phosphonic acid, iodic acid, sulfurous acid, chlorosulfonic acid and the like.
- Inorganic acid salts that can be contained in the acid aqueous solution include sodium salts, potassium salts, magnesium salts, zinc salts, calcium salts, and ammonium salts of the inorganic acids described above.
- Organic acids that can be contained in the acid aqueous solution are not particularly limited, but for example, formic acid, acetic acid, citric acid, oxalic acid, malic acid, succinic acid, butyric acid, propionic acid, gluconic acid, tartaric acid, lactic acid, fumaric acid, anions and surfactants.
- organic acids acetic acid, citric acid, oxalic acid and succinic acid are preferred.
- organic acid salts that can be contained in the acid aqueous solution include sodium salts, potassium salts, magnesium salts, zinc salts, calcium salts, and ammonium salts of the above organic acids.
- the water content of the acid aqueous solution is particularly an amount that can adjust the water content after mixing with the powdery or paste-like hydrotalcite within the range of 10 to 60% by mass.
- it is preferably in the range of 10 to 70% by mass, more preferably in the range of 20 to 50% by mass, based on the total mass (100% by mass) of the acid aqueous solution.
- the water content of the acid aqueous solution is 10% by mass or more, the reactivity can be suppressed to a certain level or less, and the surface reaction with particles can be prevented preferentially, so that by-production of salts and aggregation of particles etc. can be made less likely to occur.
- the water content of the acid aqueous solution is 70% by mass or less, a certain level of reactivity can be ensured, so that the ion exchange reaction can be carried out more reliably.
- Step of adding aqueous acid solution the acid aqueous solution is charged into a reaction vessel equipped with an arbitrary stirring means to which a predetermined amount of powdery or pasty hydrotalcite is supplied. That is, in the production method of the present invention, the first step is the step of adding an aqueous acid solution to powdery or paste-like hydrotalcite while stirring it (hereinafter simply referred to as the “adding step of the aqueous acid solution”). may be referred to as.) is further included.
- the rate of adding the aqueous acid solution is not particularly limited as long as it does not inhibit the effects of the present invention. It is preferably 1.0 to 8.5% by mass/minute (addition time: 0.06 to 80 minutes), more preferably 1.0 to 8.5% by mass/minute (addition time: 5 to 42 minutes).
- the acid aqueous solution is added at a rate within such a specific range, it is possible to ensure a certain level of productivity and prevent the surface reaction with the particles from occurring preferentially. It is possible to make it more difficult to produce by-products such as by-products and aggregation of particles.
- the first step further includes a step of mixing powdery or paste-like hydrotalcite and an acid aqueous solution (hereinafter sometimes simply referred to as a "mixing step").
- the mixing step is a step of mixing a predetermined amount of powdery or paste-like hydrotalcite and a predetermined amount of an acid aqueous solution, the acid aqueous solution is less than a predetermined amount (i.e., the above acid Aqueous solution charging step) is not included in the mixing step.
- the reaction vessel equipped with a stirring means used for mixing the powdery or pasty hydrotalcite and the acid aqueous solution mixes the entire mixed object by applying sufficient stress to the mixed object.
- Any mixer known in the art can be employed without any particular limitation as long as it can be obtained.
- Such mixers include, for example, batch kneaders, planetary mixers, and kneaders.
- reaction temperature of the ion exchange reaction may be a temperature within the range of 20 to 80°C.
- the mixing time (that is, the reaction time of the ion exchange reaction) can be set as follows, for example, because the appropriate mixing end point differs depending on the stress of the mixer used. First, 10 g of the mixture is sampled and suspended in 100 mL of deionized water. The pH of the obtained suspension is measured, and the time point when the change in pH becomes pH 0.5/hour or less is defined as the end point of mixing (that is, the end point of the reaction). When using a general mixer, the standard mixing time is 1 to 300 minutes.
- the mixing step in the first step allows the hydrotalcite as the host substance and the acid as the guest substance to undergo an ion exchange reaction. Then, the reactant after the ion exchange reaction is supplied to the next second step.
- the second step is a step of drying and pulverizing the reactant obtained in the first step without washing.
- the second step is performed according to the following procedure. That is, the paste-like reactant obtained in the first step is conveyed to an arbitrary dryer as it is without going through the washing step, and dried in the dryer. Next, the dried reactant is transported to an arbitrary pulverizer and pulverized in the pulverizer to obtain ion-exchanged hydrotalcite in a predetermined shape (eg powder, granules, etc.).
- a predetermined shape eg powder, granules, etc.
- the production method of the present invention in the above-described first step, powdery or paste-like hydrotalcite and an acid aqueous solution are mixed in the presence of a specific water content of 10 to 60% by mass and reacted.
- the hydrotalcite can be sufficiently ion-exchanged while suppressing the generation of by-products, and in particular, it is possible to sufficiently ion-exchange the hydrotalcite with an equal amount of the guest substance with respect to the target ion-exchange amount. Since it is difficult to generate an excessive amount of guest substances and organic solvent residues, in the second step, the paste-like reaction product obtained in the first step is left as it is without going through the washing step. can be dried and ground.
- the reactant obtained in the first step is dried with an arbitrary dryer. That is, the second step further includes a step of drying the reactant obtained in the first step (hereinafter sometimes simply referred to as a "drying step").
- the dryer used in this drying step is not particularly limited as long as it can sufficiently dry the reaction product, and any known dryer can be adopted.
- Such dryers include, for example, flash dryers, band dryers, vacuum dryers, spray dryers, and the like.
- Various conditions (for example, temperature, time, etc.) in the drying process can adopt arbitrary conditions according to the type, performance, etc. of the dryer to be used.
- the dried reactant that has passed through the drying step is pulverized into a predetermined shape by an arbitrary pulverizer. That is, the second step further includes a step of pulverizing the dried reactant (hereinafter sometimes simply referred to as a “pulverization step”).
- the pulverizer used in this pulverization step is not particularly limited as long as it can pulverize the dried reactant into a desired shape (e.g., powder, granules, etc.), and any known pulverizer is adopted. can do. Examples of such pulverizers include hammer mills, jet mills, ball mills, and the like. Various conditions (eg, time, etc.) in the pulverization step can adopt arbitrary conditions according to the type and performance of the pulverizer to be used.
- ion-exchanged hydrotalcite with a predetermined shape can be obtained through such a pulverization step in the second step.
- the production method of the present invention may further include arbitrary steps (for example, classification step, etc.) other than the first step and the second step within the scope of the present invention.
- the production method of the present invention is not limited to the above-described embodiments and examples described later, and can be appropriately combined, substituted, changed, etc. within the scope of the purpose and spirit of the present invention. .
- hydrotalcite may be abbreviated as "HT”.
- Example 1 50 g of carbonate ion-type hydrotalcite (HT) compound Mg 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 0.5H 2 O powder was placed in a Raikai machine (manufactured by Ishikawa Factory Co., Ltd., 53 mL of a 4 mol/L nitric acid aqueous solution was added to the mixture while stirring at a rate of 26% by mass/minute for about 1 minute so that the compounding ratio shown in Table 1 below was obtained. I put it in. Subsequently, the mixture was continuously mixed for 10 minutes and reacted to obtain a pasty reactant.
- HT carbonate ion-type hydrotalcite
- Example 1 ion-exchanged hydrotalcite
- Table 1 The analytical results of the test samples of Example 1 are shown in Table 1 below.
- Carbonate ion-type HT compound Mg 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 ⁇ 0.5H 2 O powder 50 g was placed in a beaker with a volume of 1 L, and ion-exchanged water was added. It was adjusted to a mass% aqueous slurry. The aqueous slurry was heated to 80° C. and agitation was performed. Then, 53 mL of a 4 mol/L nitric acid aqueous solution was added to this aqueous slurry at a rate of 26% by mass/minute over about 1 minute so as to achieve the compounding ratio shown in Table 1 below.
- Example 2 50 g of carbonate ion-type HT compound Mg 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 0.5H 2 O powder was crushed with a Raikai machine (manufactured by Ishikawa Factory Co., Ltd., Ishikawa type stirring). Machine No. 20), and while stirring, 15 mL of a 4 mol / L phosphoric acid aqueous solution was added at a rate of 47.7% by mass / min over about 1 minute so that the blending ratio shown in Table 2 below was obtained. put in. Subsequently, the mixture was continuously mixed for 10 minutes and reacted to obtain a pasty reactant.
- Example Mill KIIW-1 manufactured by Fuji Paudal Co., Ltd.
- a test sample of Example 2 was obtained by sieving through a wire mesh of mesh.
- Example 2 The structure of the thus-obtained test sample of Example 2 was confirmed by X-ray diffraction using "EMPYRIAN” manufactured by PANalytical. It turned out to be a mixture with the compound.
- the analytical results of the test samples of Example 2 are shown in Table 2 below.
- Example 3 1100 g of powder of carbonate ion-type HT compound Mg 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 0.5H 2 O was put in a batch type kneader (manufactured by Fuji Paudal Co., Ltd., PELLETER EXDF-60 ), and while stirring, 840 mL of a 5.3 mol/L perchloric acid aqueous solution was added at a rate of 19.8% by mass/minute over about 5 minutes so that the compounding ratio shown in Table 3 below was obtained. put in. Subsequently, the mixture was continuously mixed for 30 minutes and reacted to obtain a pasty reactant.
- Example Mill KIIW-1 manufactured by Fuji Paudal Co., Ltd.
- a test sample of Example 3 was obtained by sieving through a wire mesh of mesh.
- the particle size of the test sample of Example 3 was measured as follows. First, 70 mL of a 0.2% by mass sodium hexametaphosphate aqueous solution was placed in a 100 mL glass beaker, and 0.7 g of the dried test sample powder was put thereinto and subjected to ultrasonic treatment for 3 minutes. For this aqueous solution, a volume-based cumulative 50% particle diameter (d50) and a volume frequency (>5 ⁇ m) of particle diameters of 5 ⁇ m or more were measured using a laser diffraction scattering particle size distribution device (MT3000, manufactured by Nikkiso Co., Ltd.). . The particle size measurements are shown in Table 3 below.
- Example 4 Same as Example 3, except that 840 mL of a 5.3 mol/L perchloric acid aqueous solution was added at a rate of 9.9% by mass/minute over about 10 minutes so that the compounding ratio shown in Table 3 below was obtained. Then, the test sample of Example 4 was obtained. The amount of ion exchange and the particle size were determined in the same manner as in Example 3. These results are shown in Table 3 below.
- Example 5 Same as Example 3, except that 840 mL of a 5.3 mol/L perchloric acid aqueous solution was added at a rate of 5.0% by mass/minute over about 20 minutes so that the compounding ratio shown in Table 3 below was obtained. Then, a test sample of Example 5 was obtained. The amount of ion exchange and the particle size were determined in the same manner as in Example 3. These results are shown in Table 3 below.
- Example 6 2283 g of a paste of carbonate ion-type HT compound Mg 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 ⁇ 0.5H 2 O having a water content of 48.2% by mass was mixed in a batch type kneader (Fuji Paudal Co., Ltd.). PELLETER EXDF-60 manufactured by Co., Ltd.), and while stirring, 840 mL of a 5.3 mol / L perchloric acid aqueous solution is added at a rate of 19.8% by mass / min so that the blending ratio shown in Table 3 below is obtained. It was introduced at a speed of about 5 minutes.
- Example Mill KIIW-1 manufactured by Fuji Paudal Co., Ltd.
- Example 7 50 g of carbonate ion-type HT compound Mg 0.502 Zn 0.165 Al 0.333 (OH) 2 (CO 3 ) 0.165 0.5H 2 O powder was placed in a Raikai machine (manufactured by Ishikawa Factory Co., Ltd., Ishikawa 53 mL of a 4 mol/L nitric acid aqueous solution was added to the stirring and crushing machine No. 20) at a rate of 26% by mass/minute for about 1 minute while stirring so that the compounding ratio shown in Table 4 below was obtained. I put it in. Subsequently, the mixture was continuously mixed for 10 minutes and reacted to obtain a pasty reactant.
- a Raikai machine manufactured by Ishikawa Factory Co., Ltd., Ishikawa 53 mL of a 4 mol/L nitric acid aqueous solution was added to the stirring and crushing machine No. 20
- Example Mill KIIW-1 manufactured by Fuji Paudal Co., Ltd.
- a test sample of Example 7 was obtained by sieving through a wire mesh of mesh.
- Example 7 When the structure of the test sample of Example 7 thus obtained was confirmed by the X-ray diffraction method in the same manner as in Example 1, it was found to be a nitrate ion type HT compound. The amount of ion exchange was determined in the same manner as in Example 1. The analytical results of the test samples of Example 7 are shown in Table 4 below.
- Example 8 50 g of carbonate ion-type HT compound Zn 0.667 Al 0.333 (OH) 2 (CO 3 ) 0.165 0.5 H 2 O powder was crushed with a Raikai machine (manufactured by Ishikawa Factory Co., Ltd., Ishikawa type stirring). No. 20), and while stirring, 53 mL of a 4 mol/L nitric acid aqueous solution was added at a rate of 26% by mass/minute over about 1 minute so that the compounding ratio shown in Table 4 below was obtained. Subsequently, the mixture was continuously mixed for 10 minutes and reacted to obtain a pasty reactant.
- Example Mill KIIW-1 manufactured by Fuji Paudal Co., Ltd.
- a test sample of Example 8 was obtained by sieving through a wire mesh of mesh.
- Example 8 When the structure of the test sample of Example 8 obtained in this way was confirmed by the X-ray diffraction method in the same manner as in Example 1, it was found to be a nitrate ion type HT compound. The amount of ion exchange was determined in the same manner as in Example 1. The analytical results of the test samples of Example 8 are shown in Table 4 below.
- the ion-exchanged hydrotalcite obtained by the production method of the present invention is used for resin additives (e.g., heat stabilizers, anti-coloring agents, flame retardants, etc.), adsorbents, pharmaceuticals (e.g., DDS, etc.), Hydrotalcite can be used in a wide variety of applications.
- resin additives e.g., heat stabilizers, anti-coloring agents, flame retardants, etc.
- adsorbents e.g., adsorbents
- pharmaceuticals e.g., DDS, etc.
- Hydrotalcite can be used in a wide variety of applications.
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Abstract
Description
なお、イオン交換法の一例である特許文献1の方法においても、炭酸イオン型のLDHを、酸性化合物を含む有機溶媒と接触させる必要があるため、有機溶媒の取り扱いや廃液処理等の対応が不可欠となり、結果的に工程が煩雑になるとともに、大掛かりな設備が必要であった。
また、これら従来の方法は、目的とするイオン交換量に対し、過剰量のゲスト物質が必要となるため、反応後に系内に残る過剰量のゲスト物質やゲスト物質に起因する副生物(以下、単に「副生物等」と称することがある。)を除去するための洗浄工程が不可欠であり、洗浄工程用の設備や廃液処理等の対応が必要であった。
粉末状又はペースト状のハイドロタルサイトと酸水溶液とを、混合後の水分量が10~60質量%の範囲内となるように混合して反応させる第1工程と、
前記第1工程で得られた反応物を、洗浄工程を経ずに乾燥して粉砕する第2工程と、
を含むことを特徴とする、前記製造方法である。
M2+ 1-xM3+ x(OH)2An- x/n・mH2O (1)
(式中、M2+は2価の金属イオン、M3+は3価の金属イオン、An-はn価のアニオンを表し、xは0.18≦x≦0.4を満たす数を表し、nは1~4の整数を表し、mは0≦m≦5を満たす数を表す。)
本発明の製造方法は、粉末状又はペースト状のハイドロタルサイトと酸水溶液とを、混合後の水分量が10~60質量%の範囲内となるように混合して反応させる第1工程と、該第1工程で得られた反応物を、洗浄工程を経ずに乾燥して粉砕する第2工程と、を含む製造方法である。
本発明の製造方法において、第1工程は、粉末状又はペースト状のハイドロタルサイトと酸水溶液とを、混合後の水分量が10~60質量%の範囲内となるように混合して反応させる工程である。
本発明の製造方法において、原料として用い得るホスト物質のハイドロタルサイトは、粉末状又はペースト状のハイドロタルサイトであれば特に限定されず、公知の任意のハイドロタルサイトを採用することができる。なお、ペースト状のハイドロタルサイトは、通常、水分量が60質量%以下である所定の粘性と流動性を有するハイドロタルサイトであり、水分量が60質量%を超えるスラリー状のハイドロタルサイトとは、少なくともその水分量によって明確に区別される。
M2+ 1-xM3+ x(OH)2An- x/n・mH2O (1)
(式中、M2+は2価の金属イオン、M3+は3価の金属イオン、An-はn価のアニオンを表し、xは0.18≦x≦0.4を満たす数を表し、nは1~4の整数を表し、mは0≦m≦5を満たす数を表す。)
本発明の製造方法において、ゲスト物質の酸は、水に溶解させた酸水溶液の形態で用いられる。酸水溶液のpHは6以下である。酸水溶液に含まれる酸の種類は、特に限定されず、所望の製品品質等に応じた任意の酸を採用することができるが、無機酸、無機酸塩類、有機酸及び有機酸塩類からなる群より選ばれる少なくとも一種の酸であることが好ましい。ゲスト物質となる酸水溶液に含まれる酸がこのような特定の酸であると、より確実に、ハイドロタルサイトを、副生物等の生成を抑制しつつ十分にイオン交換することができる。
そして、本発明の製造方法において、酸水溶液は、所定量の粉末状又はペースト状のハイドロタルサイトが供給された任意の撹拌手段を備えた反応容器内に投入される。すなわち、本発明の製造方法において、第1工程は、粉末状又はペースト状のハイドロタルサイトを攪拌しながら、これに対して酸水溶液を投入する工程(以下、単に「酸水溶液の投入工程」と称することがある。)を更に含む。
そして、第1工程において、反応容器内の粉末状又はペースト状のハイドロタルサイト及び酸水溶液は、反応容器の撹拌手段によって所定時間混合される。すなわち、第1工程は、粉末状又はペースト状のハイドロタルサイトと酸水溶液を混合する工程(以下、単に「混合工程」と称することがある。)を更に含む。なお、かかる混合工程は、所定量の粉末状又はペースト状のハイドロタルサイトと、所定量の酸水溶液とを混合する工程であるため、酸水溶液が所定量に満たない段階(すなわち、上述の酸水溶液の投入工程)は、混合工程には含まれない。
本発明の製造方法において、第2工程は、第1工程で得られた反応物を、洗浄工程を経ずに乾燥して粉砕する工程である。
第2工程において、第1工程で得られた反応物は、任意の乾燥機によって乾燥される。すなわち、第2工程は、第1工程で得られた反応物を乾燥する工程(以下、単に「乾燥工程」と称することがある。)を更に含む。
第2工程において、乾燥工程を経た乾燥後の反応物は、任意の粉砕機によって所定形状に粉砕される。すなわち、第2工程は、乾燥後の反応物を粉砕する工程(以下、単に「粉砕工程」と称することがある。)を更に含む。
炭酸イオン型ハイドロタルサイト(HT)類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gをライカイ機(株式会社 石川工場社製、石川式撹拌擂潰機 20号)に供給し、攪拌しながらこれに、下記の表1に示す配合比となるように4mol/Lの硝酸水溶液53mLを26質量%/分の速度で約1分かけて投入した。続いて10分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例1の試験用試料(イオン交換されたハイドロタルサイト)を得た。
炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gを容積1Lのビーカーに入れ、さらにイオン交換水を加えて6質量%の水性スラリーに調整した。この水性スラリーを80℃に加熱し、撹拌を実施した。そしてこの水性スラリーに、下記の表1に示す配合比となるように4mol/Lの硝酸水溶液53mLを26質量%/分の速度で約1分かけて投入した。続いて60分間混合を継続して反応させ、スラリー状の反応物を得た。得られたスラリー状の反応物を吸引濾過器で脱水し、固形分に対して20倍量のイオン交換水で洗浄し、脱水を行った。得られた脱水物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、比較例1の試験用試料を得た。なお、イオン交換量は、実施例1と同様にして求めた。比較例1の試験用試料の分析結果を下記の表1に示す。
炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gをライカイ機(株式会社 石川工場社製、石川式撹拌擂潰機 20号)に供給し、攪拌しながらこれに、下記の表2に示す配合比となるように4mol/Lのリン酸水溶液15mLを47.7質量%/分の速度で約1分かけて投入した。続いて10分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例2の試験用試料を得た。
炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gを容積1Lのビーカーに入れ、さらにイオン交換水を加えて6質量%の水性スラリーに調整した。この水性スラリーを80℃に加熱し、撹拌を実施した。そしてこの水性スラリーに、下記の表2に示す配合比となるように4mol/Lのリン酸水溶液15mLを47.7質量%/分の速度で約1分かけて投入した。続いて60分間混合を継続して反応させ、スラリー状の反応物を得た。得られたスラリー状の反応物を吸引濾過器で脱水し、固形分に対して20倍量のイオン交換水で洗浄し、脱水を行った。得られた脱水物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、比較例2の試験用試料を得た。なお、イオン交換量は、実施例2と同様にして求めた。比較例2の試験用試料の分析結果を下記の表2に示す。
炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末1100gをバッチ式ニーダー(不二パウダル株式会社製、PELLETER EXDF-60)に供給し、攪拌しながらこれに、下記の表3に示す配合比となるように5.3mol/Lの過塩素酸水溶液840mLを19.8質量%/分の速度で約5分かけて投入した。続いて30分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例3の試験用試料を得た。
下記の表3に示す配合比となるように5.3mol/Lの過塩素酸水溶液840mLを9.9質量%/分の速度で約10分かけて投入したこと以外は、実施例3と同様にして、実施例4の試験用試料を得た。なお、イオン交換量及び粒子径の測定は、実施例3と同様にして求めた。これらの結果を下記の表3に示す。
下記の表3に示す配合比となるように5.3mol/Lの過塩素酸水溶液840mLを5.0質量%/分の速度で約20分かけて投入したこと以外は、実施例3と同様にして、実施例5の試験用試料を得た。なお、イオン交換量及び粒子径の測定は、実施例3と同様にして求めた。これらの結果を下記の表3に示す。
水分量48.2質量%の炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oのペースト2283gをバッチ式ニーダー(不二パウダル株式会社製、PELLETER EXDF-60)に入れ、撹拌しながらこれに、下記の表3に示す配合比となるように5.3mol/Lの過塩素酸水溶液840mLを19.8質量%/分の速度で約5分かけて投入した。続いて60分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例6の試験用試料を得た。なお、イオン交換量及び粒子径の測定は、実施例3と同様にして求めた。これらの結果を下記の表3に示す。
炭酸イオン型HT類化合物Mg0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gを容積1Lのビーカーに入れ、さらにイオン交換水を加えて10質量%の水性スラリーに調整した。この水性スラリーを40℃に加熱し、撹拌を実施した。そしてこの水性スラリーに、下記の表3に示す配合比となるように5.3mol/Lの過塩素酸水溶液38mLを2.5質量%/分の速度で約40分かけて投入した。続いて60分間混合を継続して反応させ、スラリー状の反応物を得た。得られたスラリー状の反応物を吸引濾過器で脱水し、固形分に対して20倍量のイオン交換水で洗浄し、脱水を行った。得られた脱水物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、比較例3の試験用試料を得た。なお、イオン交換量及び粒子径の測定は、実施例3と同様にして求めた。これらの結果を下記の表3に示す。
炭酸イオン型HT類化合物Mg0.502Zn0.165Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gをライカイ機(株式会社 石川工場社製、石川式撹拌擂潰機 20号)に供給し、攪拌しながらこれに、下記の表4に示す配合比となるように4mol/Lの硝酸水溶液53mLを26質量%/分の速度で約1分かけて投入した。続いて10分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例7の試験用試料を得た。
炭酸イオン型HT類化合物Mg0.502Zn0.165Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gを容積1Lのビーカーに入れ、さらにイオン交換水を加えて6質量%の水性スラリーに調整した。この水性スラリーを80℃に加熱し、撹拌を実施した。そしてこの水性スラリーに、下記の表4に示す配合比となるように4mol/Lの硝酸水溶液53mLを26質量%/分の速度で約1分かけて投入した。続いて60分間混合を継続して反応させ、スラリー状の反応物を得た。得られたスラリー状の反応物を吸引濾過器で脱水し、固形分に対して20倍量のイオン交換水で洗浄し、脱水を行った。得られた脱水物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、比較例4の試験用試料を得た。なお、イオン交換量は、実施例1と同様にして求めた。比較例4の試験用試料の分析結果を下記の表4に示す。
炭酸イオン型HT類化合物Zn0.667Al0.333(OH)2(CO3)0.165・0.5H2Oの粉末50gをライカイ機(株式会社 石川工場社製、石川式撹拌擂潰機 20号)に供給し、攪拌しながらこれに、下記の表4に示す配合比となるように4mol/Lの硝酸水溶液53mLを26質量%/分の速度で約1分かけて投入した。続いて10分間混合を継続して反応させ、ペースト状の反応物を得た。得られたペースト状の反応物を乾燥機(ヤマト科学株式会社製、Drying Oven DS44)で蒸発乾固し、粉砕機(不二パウダル株式会社製、サンプルミル KIIW-1)で粉砕した後、100メッシュの金網で篩過し、実施例8の試験用試料を得た。
2 酸
3 イオン交換されたハイドロタルサイト
Claims (8)
- イオン交換されたハイドロタルサイトの製造方法であって、
粉末状又はペースト状のハイドロタルサイトと酸水溶液とを、混合後の水分量が10~60質量%の範囲内となるように混合して反応させる第1工程と、
前記第1工程で得られた反応物を、洗浄工程を経ずに乾燥して粉砕する第2工程と、
を含むことを特徴とする、前記製造方法。 - 前記粉末状又はペースト状のハイドロタルサイトが下記式(1)で表されるハイドロタルサイトであることを特徴とする、請求項1に記載の製造方法。
M2+ 1-xM3+ x(OH)2An- x/n・mH2O (1)
(式中、M2+は2価の金属イオン、M3+は3価の金属イオン、An-はn価のアニオンを表し、xは0.18≦x≦0.4を満たす数を表し、nは1~4の整数を表し、mは0≦m≦5を満たす数を表す。) - 前記式(1)中のM2+がMg2+及びZn2+のうちの少なくとも1種の金属イオンであり、M3+がAl3+であることを特徴とする、請求項2に記載の製造方法。
- 前記式(1)中のAn-がCO3 2-であることを特徴とする、請求項2又は3に記載の製造方法。
- 前記粉末状又はペースト状のハイドロタルサイトの水分量が0~60質量%の範囲内であることを特徴とする、請求項1~4のいずれか一項に記載の製造方法。
- 前記酸水溶液に含まれる酸が、無機酸、無機酸塩類、有機酸及び有機酸塩類からなる群より選ばれる少なくとも一種の酸であることを特徴とする、請求項1~5のいずれか一項に記載の製造方法。
- 前記酸水溶液の水分量が10~70質量%の範囲内であることを特徴とする、請求項1~6のいずれか一項に記載の製造方法。
- 前記第1工程は、前記粉末状又はペースト状のハイドロタルサイトに対して前記酸水溶液を投入する工程を更に含み、前記酸水溶液の投入速度が、ハイドロタルサイトの質量に対して0.5~710質量%/分であることを特徴とする、請求項1~7のいずれか一項に記載の製造方法。
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JPH06219732A (ja) * | 1993-01-20 | 1994-08-09 | Kyowa Chem Ind Co Ltd | 過塩素酸イオン型ハイドロタルサイト類化合物および含ハロゲン樹脂組成物 |
JP2000024658A (ja) * | 1998-07-08 | 2000-01-25 | Kaisui Kagaku Kenkyusho:Kk | 水の脱リン剤およびリンの除去、再生方法 |
JP2002020121A (ja) * | 2000-04-12 | 2002-01-23 | Mizusawa Ind Chem Ltd | イオン交換による複合金属多塩基性塩の製造方法 |
JP2004099391A (ja) * | 2002-09-11 | 2004-04-02 | Mizusawa Ind Chem Ltd | 層状複水酸化物の製造方法 |
JP2005255441A (ja) * | 2004-03-10 | 2005-09-22 | National Institute For Materials Science | ハイドロタルサイトの脱炭酸イオンによる、イオン交換性のある陰イオンを有する層状複水酸化物の製造方法およびその用途 |
WO2012102151A1 (ja) | 2011-01-27 | 2012-08-02 | 独立行政法人物質・材料研究機構 | 陰イオン交換性層状複水酸化物の製造方法及び炭酸イオンを含む層状複水酸化物の炭酸イオンを置換する方法 |
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JPH06219732A (ja) * | 1993-01-20 | 1994-08-09 | Kyowa Chem Ind Co Ltd | 過塩素酸イオン型ハイドロタルサイト類化合物および含ハロゲン樹脂組成物 |
JP2000024658A (ja) * | 1998-07-08 | 2000-01-25 | Kaisui Kagaku Kenkyusho:Kk | 水の脱リン剤およびリンの除去、再生方法 |
JP2002020121A (ja) * | 2000-04-12 | 2002-01-23 | Mizusawa Ind Chem Ltd | イオン交換による複合金属多塩基性塩の製造方法 |
JP2004099391A (ja) * | 2002-09-11 | 2004-04-02 | Mizusawa Ind Chem Ltd | 層状複水酸化物の製造方法 |
JP2005255441A (ja) * | 2004-03-10 | 2005-09-22 | National Institute For Materials Science | ハイドロタルサイトの脱炭酸イオンによる、イオン交換性のある陰イオンを有する層状複水酸化物の製造方法およびその用途 |
WO2012102151A1 (ja) | 2011-01-27 | 2012-08-02 | 独立行政法人物質・材料研究機構 | 陰イオン交換性層状複水酸化物の製造方法及び炭酸イオンを含む層状複水酸化物の炭酸イオンを置換する方法 |
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