CN117299098B - High-performance titanium-based lithium adsorbent and preparation method and application thereof - Google Patents
High-performance titanium-based lithium adsorbent and preparation method and application thereof Download PDFInfo
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- CN117299098B CN117299098B CN202311603408.3A CN202311603408A CN117299098B CN 117299098 B CN117299098 B CN 117299098B CN 202311603408 A CN202311603408 A CN 202311603408A CN 117299098 B CN117299098 B CN 117299098B
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- based lithium
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- lithium adsorbent
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 174
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 141
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000010936 titanium Substances 0.000 title claims abstract description 106
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 103
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000002243 precursor Substances 0.000 claims abstract description 75
- 239000000843 powder Substances 0.000 claims abstract description 74
- 238000001179 sorption measurement Methods 0.000 claims abstract description 40
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000012267 brine Substances 0.000 claims abstract description 28
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 28
- 238000004090 dissolution Methods 0.000 claims abstract description 27
- 150000002641 lithium Chemical class 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 238000005299 abrasion Methods 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 43
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 30
- 239000007822 coupling agent Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000009998 heat setting Methods 0.000 claims description 18
- 239000000872 buffer Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 238000010035 extrusion spinning Methods 0.000 claims description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 13
- -1 diisopropyl titanate Chemical compound 0.000 claims description 13
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- 239000003085 diluting agent Substances 0.000 claims description 12
- 239000004014 plasticizer Substances 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 10
- SWAIALBIBWIKKQ-UHFFFAOYSA-N lithium titanium Chemical compound [Li].[Ti] SWAIALBIBWIKKQ-UHFFFAOYSA-N 0.000 claims description 10
- 229910001416 lithium ion Inorganic materials 0.000 claims description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 8
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 8
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 8
- 229920003169 water-soluble polymer Polymers 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- 239000013522 chelant Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- PLFQIDVWTRTUCN-UHFFFAOYSA-N CO[SiH](C)CCCNCCN Chemical compound CO[SiH](C)CCCNCCN PLFQIDVWTRTUCN-UHFFFAOYSA-N 0.000 claims description 5
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 239000006172 buffering agent Substances 0.000 claims description 5
- 239000004584 polyacrylic acid Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004801 Chlorinated PVC Substances 0.000 claims description 3
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 3
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 claims description 3
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- STZKYOQJAGNMCZ-UHFFFAOYSA-N CCO[SiH2]CCCOCC1CO1 Chemical compound CCO[SiH2]CCCOCC1CO1 STZKYOQJAGNMCZ-UHFFFAOYSA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 2
- 229910009105 Li1.33Ti1.66O4 Inorganic materials 0.000 claims description 2
- GKFHMPHWPMGDOL-UHFFFAOYSA-N NCCNCCC[SiH](OCC)C Chemical compound NCCNCCC[SiH](OCC)C GKFHMPHWPMGDOL-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- VNGOYPQMJFJDLV-UHFFFAOYSA-N dimethyl benzene-1,3-dicarboxylate Chemical compound COC(=O)C1=CC=CC(C(=O)OC)=C1 VNGOYPQMJFJDLV-UHFFFAOYSA-N 0.000 claims description 2
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 2
- GNARHXWTMJZNTP-UHFFFAOYSA-N methoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[SiH2]CCCOCC1CO1 GNARHXWTMJZNTP-UHFFFAOYSA-N 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001444 polymaleic acid Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- FDLZQPXZHIFURF-UHFFFAOYSA-N [O-2].[Ti+4].[Li+] Chemical group [O-2].[Ti+4].[Li+] FDLZQPXZHIFURF-UHFFFAOYSA-N 0.000 claims 1
- UWNADWZGEHDQAB-UHFFFAOYSA-N i-Pr2C2H4i-Pr2 Natural products CC(C)CCC(C)C UWNADWZGEHDQAB-UHFFFAOYSA-N 0.000 claims 1
- UJSHLJUYMXUGAZ-UHFFFAOYSA-N methoxy-methyl-propylsilane Chemical compound CCC[SiH](C)OC UJSHLJUYMXUGAZ-UHFFFAOYSA-N 0.000 claims 1
- 125000005498 phthalate group Chemical group 0.000 claims 1
- 150000003608 titanium Chemical class 0.000 abstract description 10
- 239000012452 mother liquor Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 235000011837 pasties Nutrition 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000002145 thermally induced phase separation Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- ZVOAAFIMEKXELU-UHFFFAOYSA-N 2-methylpropyl 3-oxohexanoate Chemical compound CCCC(=O)CC(=O)OCC(C)C.CCCC(=O)CC(=O)OCC(C)C ZVOAAFIMEKXELU-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229940093858 ethyl acetoacetate Drugs 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- XPDGHGYGTJOTBC-UHFFFAOYSA-N methoxy(methyl)silicon Chemical compound CO[Si]C XPDGHGYGTJOTBC-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical class OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000003361 porogen Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28021—Hollow particles, e.g. hollow spheres, microspheres or cenospheres
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
- C01D15/04—Halides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to the technical field of lithium adsorbents, and particularly relates to a high-performance titanium-based lithium adsorbent, and a preparation method and application thereof, wherein the adsorbent comprises the following components: the total weight of the titanium-based lithium adsorbent is 100wt%, the content of the modified titanium-based lithium adsorbent precursor powder is 50wt% -80 wt%, and the content of the skeleton resin is 20wt% -50 wt%; the adsorbent is one or more of solid rod-shaped and hollow rod-shaped, and the average grain diameter is 0.5-2 mm; the adsorption quantity of saturated lithium is more than or equal to 15 g/L; the dissolution loss rate is less than or equal to 0.05 percent/hundred cycles; the abrasion rate is less than or equal to 0.1 percent/hundred cycles. The titanium-based lithium adsorbent has obviously improved adsorption performance, dissolution loss resistance and wear resistance, and is particularly suitable for recovering lithium extraction and lithium precipitation mother liquor of alkaline brine.
Description
Technical Field
The invention belongs to the technical field of lithium adsorbents, and particularly relates to a high-performance titanium-based lithium adsorbent, and a preparation method and application thereof.
Background
Nearly 80% of lithium resources in China are distributed in salt lakes in Qinghai and Tibet areas, and the extraction of lithium from the salt lakes is one of important sources of lithium resources. The adsorption method for extracting lithium has the advantages of high production efficiency, low extraction cost and small environmental pollution, and the aluminum-based lithium adsorbent suitable for chloride-type brine is widely applied to salt lakes in Qinghai regions. However, the manganese-based/titanium-based lithium adsorbent suitable for carbonate-based or sulfate-based brine in the Tibetan area has no industrial application cases because of the problems of reduced adsorption performance, reduced adsorption performance after granulation, and the like caused by the dissolution loss, abrasion and the like of the adsorbent in the adsorption and desorption processes.
Patent document CN102631897a discloses a method of spherical particle lithium adsorption resin, in which an inorganic lithium adsorbent precursor, a polymer material or a reactive monomer, a pore-forming agent and the like are mixed to prepare a dispersed phase, and then the dispersed phase is "suspended" in a continuous phase to be dispersed into spherical beads by stirring and solidified into spherical particle lithium adsorption resin; the preparation method has the advantages of complicated preparation steps, high technological condition requirements, lower production efficiency and higher equipment investment cost.
Patent document CN114345291a discloses a preparation method of a granular titanium-based lithium ion sieve adsorbent with high adsorption capacity, and the prepared adsorbent has the advantages of good hydrophilicity, high porosity, high adsorption and desorption rate, high lithium adsorption capacity and the like, but still has the problem of high dissolution loss rate in long-period operation.
The problems existing in the conventional preparation of titanium-based lithium adsorbents restrict the application of the titanium-based lithium adsorbents in extracting lithium from brine, so that the problems of how to improve the adsorption performance, the dissolution loss resistance and the wear resistance of the titanium-based lithium adsorbents are needed to be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-performance titanium-based lithium adsorbent, and a preparation method and application thereof.
In order to achieve the technical purpose, the invention provides the following technical scheme:
in a first aspect, there is provided a high-performance titanium-based lithium adsorbent, wherein the titanium-based lithium adsorbent has one or more of a solid rod shape and a hollow rod shape (appearance), and has an average particle diameter of 0.5 to 2mm (for example, 0.55mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm, 1.8 mm);
the saturated lithium adsorption amount of the titanium-based lithium adsorbent is more than or equal to 15 g/L (for example, 16g/L, 18g/L, 20g/L, 25g/L, 30g/L and 50 g/L); the dissolution loss rate is less than or equal to 0.05%/hundred cycles (e.g., 0.04%/hundred cycles, 0.03%/hundred cycles, 0.02%/hundred cycles, 0.01%/hundred cycles, 0.005%/hundred cycles, 0.001%/hundred cycles); the wear rate is less than or equal to 0.1%/hundred cycles (e.g., 0.08%/hundred cycles, 0.06%/hundred cycles, 0.05%/hundred cycles, 0.02%/hundred cycles, 0.01%/hundred cycles, 0.005%/hundred cycles, 0.001%/hundred cycles).
According to the present invention, there is provided a titanium-based lithium adsorbent, which includes: the modified titanium-based lithium adsorbent precursor powder and a skeleton resin; based on 100 weight percent of the total weight of the titanium-based lithium adsorbent, wherein:
the content of the modified titanium-based lithium adsorbent precursor powder is 50wt% -80 wt% (e.g., 52wt%, 55wt%, 60wt%, 65wt%, 70wt%, 75wt%, 78 wt%),
the content of the skeleton resin is 20wt% to 50wt% (e.g., 22wt%, 24wt%, 25wt%, 28wt%, 30wt%, 35wt%, 40wt%, 45wt%, 48 wt%).
In the text, the modified titanium-based lithium adsorbent precursor powder is a product obtained by modifying the titanium-based lithium adsorbent precursor powder with a modifier. The modified titanium-based lithium adsorbent precursor powder may be obtained by, for example, uniformly dispersing the titanium-based lithium adsorbent precursor powder, the coupling agent, and the buffer in a diluent to obtain a blend, and drying the blend to obtain the modified titanium-based lithium adsorbent precursor powder.
Wherein the coupling agent is selected from an amino silane coupling agent or a compound of an epoxy silane coupling agent and a chelate titanate coupling agent; the buffering agent is selected from one or more of polycarboxylic polymers, and the polymerization degree of the buffering agent is 5-30. The mass ratio of the coupling agent to the titanium-based lithium adsorbent precursor powder may be 0.5% -2% (e.g., 0.55%, 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.5%, 1.8%), and the mass ratio of the buffer to the titanium-based lithium adsorbent precursor powder may be 5% -20% (e.g., 6%, 8%, 10%, 12%, 15%, 18%).
In a second aspect, a method for preparing a high-performance titanium-based lithium adsorbent is provided, comprising the steps of:
1) Uniformly dispersing titanium-based lithium adsorbent precursor powder, a coupling agent and a buffering agent in a diluent to obtain a blend A, and drying the blend A to obtain modified precursor powder (namely modified titanium-based lithium adsorbent precursor powder);
2) And (3) uniformly mixing the modified precursor powder obtained in the step (1) with the skeleton resin, the pore-forming agent and the plasticizer to obtain a blend B, carrying out melt extrusion spinning on the blend B, and carrying out stretching, heat setting, extraction and water washing and granulating to obtain high-performance titanium lithium adsorbent particles.
According to the preparation method of the invention, the titanium-based lithium adsorbent (appearance) prepared by the preparation method is one or more of solid rod-shaped and hollow rod-shaped, and the average particle size is 0.5-2 mm (for example, 0.55mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm and 1.8 mm); the saturated lithium adsorption capacity is more than or equal to 15 g/L (for example, 16g/L, 18g/L, 20g/L, 25g/L, 30g/L and 50 g/L); the dissolution loss rate is less than or equal to 0.05%/hundred cycles (e.g., 0.04%/hundred cycles, 0.03%/hundred cycles, 0.02%/hundred cycles, 0.01%/hundred cycles, 0.005%/hundred cycles, 0.001%/hundred cycles); the wear rate is less than or equal to 0.1%/hundred cycles (e.g., 0.08%/hundred cycles, 0.06%/hundred cycles, 0.05%/hundred cycles, 0.02%/hundred cycles, 0.01%/hundred cycles, 0.005%/hundred cycles, 0.001%/hundred cycles).
According to the preparation method of the invention, the prepared titanium-based lithium adsorbent comprises the following components: the modified titanium-based lithium adsorbent precursor powder and a skeleton resin; based on 100 weight percent of the total weight of the titanium-based lithium adsorbent, wherein:
the content of the modified titanium-based lithium adsorbent precursor powder is 50wt% -80 wt% (e.g., 52wt%, 55wt%, 60wt%, 65wt%, 70wt%, 75wt%, 78 wt%) and the content of the skeleton resin is 20wt% -50 wt% (e.g., 22wt%, 24wt%, 25wt%, 28wt%, 30wt%, 35wt%, 40wt%, 45wt%, 48 wt%).
According to the preparation method provided by the invention, in some embodiments, the titanium-based lithium adsorbent precursor powder is selected from lithium titanium oxide-type lithium adsorbents, preferably from Li 2 TiO 3 、Li 1.33 Ti 1.66 O 4 、Li 4 Ti 5 O 12 One or more of the following;
in some embodiments, the particle size of the titanium-based lithium adsorbent precursor powder is 1-15 μm (e.g., 2 μm, 4 μm, 5 μm, 8 μm, 10 μm, 12 μm, 14 μm).
In this context, the source of the titanium-based lithium adsorbent precursor powder may be commercially available or self-prepared, and the self-made process may be prepared by a high temperature solid phase process, a sol-gel process, or the like conventionally used in the art, for example, by a titanium oxide (e.g., tiO 2 ) With lithium salts (e.g. Li 2 CO 3 ) Or mixing lithium hydroxide and roasting at high temperature.
In order to meet the requirement of the present invention for the particle size of the titanium-based lithium adsorbent precursor powder, the titanium-based lithium adsorbent precursor powder may be subjected to steps such as pulverization, sieving, etc., which may be performed using a method conventional in the art.
In some embodiments, the coupling agent is selected from an aminosilane coupling agent or a complex of an epoxy-based silane coupling agent and a chelating titanate coupling agent. For example, the coupling agent is a complex of an aminosilane coupling agent and a chelate titanate coupling agent, or is a complex of an epoxy-based silane coupling agent and a chelate titanate coupling agent. The amino or epoxy silane coupling agent and chelate titanate coupling agent compound is adopted, so that on one hand, the thermal stability of the coupling agent in the melt extrusion spinning process of the step 2) can be enhanced; on the other hand, the stability of the modified titanium lithium adsorbent precursor powder in an acidic desorption environment can be improved, and the dissolution loss can be reduced.
In some embodiments, the aminosilane coupling agent or epoxy-type silane coupling agent is selected from one or more of N-2-aminoethyl-3-aminopropyl methyl methoxy silane, N-2-aminoethyl-3-aminopropyl methyl ethoxy silane, 3-diethylenetriaminopropyl methyl methoxy silane, 3-glycidyloxypropyl ethoxy silane, and 3-glycidyloxypropyl methoxy silane.
In some embodiments, the chelating titanate coupling agent is selected from one or more of bis triethanolamine diisopropyltitanate, bis (ethylacetoacetate) di-n-butoxytitanate, diisobutyl bis (ethylacetoacetate) titanate, bis (acetylacetonate) ethoxyisopropoxy titanate, and bis (acetylacetonate) diisopropyltitanate.
In some embodiments, the mass ratio of the aminosilane coupling agent or the epoxy-based silane coupling agent to the chelate titanate coupling agent is 2:1-1:2; for example, 2:1.5, 1:1, 2:2.5, 2:3, 2:3.5.
In some embodiments, the mass ratio of the coupling agent to the titanium-based lithium adsorbent precursor powder is 0.5% -2% (e.g., 0.55%, 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.5%, 1.8%).
In some embodiments, the buffer is selected from one or more of the polycarboxy polymers, preferably from one or more of polyacrylic acid, polymethacrylic acid and polymaleic acid, having a degree of polymerization of 5 to 30 (e.g., 6, 7, 8, 10, 12, 15, 18, 20, 22, 25, 28).
In some embodiments, the mass ratio of the buffer to the titanium-based lithium adsorbent precursor powder is 5% -20% (e.g., 6%, 8%, 10%, 12%, 15%, 18%).
According to the invention, a buffer agent is added in the process of modifying the titanium-based lithium adsorbent precursor powder, the dosage of the buffer agent is controlled within a proper range, and the chain segment part of the buffer agent is wrapped with the titanium-based lithium adsorbent precursor powder, so that in the adsorption environment of the titanium-based lithium adsorbent (carbonate-type or sulfate-type brine is alkaline or nearly neutral), most of carboxyl groups in the buffer agent are-COO-, the acting force on lithium ions in the brine is improved, and the adsorption effect is enhanced; in addition, in the desorption environment of the titanium-based lithium adsorbent (the desorption liquid is acidic), most of carboxyl forms in the buffering agent are converted into-COOH, so that the buffering effect is realized, the acidity of the surrounding environment is reduced, the stability of the modified titanium-based lithium adsorbent precursor powder in the acidic desorption environment is improved, and the dissolution loss is reduced.
In some embodiments, the diluent is selected from one or more of ethanol, isopropanol, a mixture of water and ethanol, a mixture of water and isopropanol.
In some embodiments, the diluent is a mixture of water and ethanol; in a mixture of water and ethanol, the water comprises no more than 10% (e.g., 8%, 6%, 5%, 4%, 2%, 1%) by volume of the mixture.
In some embodiments, the diluent is a mixture of water and isopropyl alcohol; in the mixture of water and isopropanol, the water accounts for not more than 10% (e.g., 8%, 6%, 5%, 4%, 2%, 1%) of the volume of the mixture.
In some embodiments, the mass ratio of the diluent to the titanium-based lithium sorbent precursor powder is 1:2 to 1:1 (e.g., 1.1:2, 1.2:2, 1.4:2, 1.5:2, 1.6:2, 1.8:2).
In step 1) of the present invention, the mixing of the titanium-based lithium adsorbent precursor powder, the coupling agent, the buffer and the diluent may be performed using equipment (e.g., mechanical stirring, kneader, planetary mixer, screw mixer, etc.) conventional in the art. After uniform mixing, the obtained blend A is in a pasty or dough shape, and then is dried for more than 2h (for example, 2.5h, 3h, 5h and 8 h) under the environment of 50-70 ℃ (for example, 55 ℃, 60 ℃ and 65 ℃) to obtain modified precursor powder. Wherein, the drying function is to promote the coupling agent to complete polycondensation and remove a small amount of methanol or ethanol formed during the hydrolysis of the diluent and the coupling agent.
In some embodiments, in step 2), the backbone resin is selected from one or more of polyvinyl chloride, chlorinated polyvinyl chloride, polyvinylidene fluoride, polymethyl methacrylate, polyethylene, and polypropylene; in some embodiments, the backbone resin has a weight average molecular weight of 300,000 to 700,000 daltons (e.g., 320,000, 340,000, 350,000, 380,000, 400,000, 450,000, 500,000, 550,000, 600,000, 650,000, 680,000 daltons).
In some embodiments, in step 2), the porogen is selected from one or more of the group consisting of a complex of a water soluble polymer and a water soluble inorganic salt. On one hand, the pore-forming agent is added, so that the compatibility of the modified precursor powder and the skeleton resin can be enhanced, and the uniform mixing and non-agglomeration of the precursor powder and the skeleton resin are ensured; on the other hand, the porous material can be used as a pore structure regulator, and can regulate and control phase separation paths in the pore forming process, so as to improve pore morphology.
In some embodiments, the water-soluble polymer is selected from one or more of polyethylene glycol, polyvinylpyrrolidone, and polyvinyl alcohol;
in some embodiments, the water-soluble inorganic salt is selected from one or more of sodium chloride, lithium chloride, potassium chloride, and calcium chloride;
in some embodiments, the mass ratio of the water-soluble polymer to the water-soluble inorganic salt in the complex of the water-soluble polymer and the water-soluble inorganic salt is preferably 2:1 to 1:2 (e.g., 2:1.5, 1:1, 2:2.5, 2:3, 2:3.5).
In some embodiments, in step 2), the plasticizer is selected from one or more of the phthalate esters, preferably selected from one or more of dibutyl phthalate, dioctyl phthalate, dimethyl isophthalate and dioctyl terephthalate.
In some embodiments, in step 2), the components of blend B are used in the following amounts, based on 100wt% of the total weight of blend B:
25% -60% by weight (e.g., 26%, 30%, 35%, 38%, 40%, 42%, 45%, 48%, 50%, 55% by weight) of modified precursor powder,
10% -37.5% by weight (e.g., 12%, 14%, 15%, 16%, 18%, 20%, 25%, 30%, 32%, 35%, 36%, 37%) of a skeletal resin,
5 to 10wt% (e.g., 5.5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 9.5 wt%),
20% -40% by weight (e.g., 22%, 24%, 25%, 28%, 30%, 32%, 35%, 38%) of plasticizer.
In step 2), the melt extrusion spinning process can be realized by a screw extrusion spinning device. Adding the modified precursor powder, the skeleton resin, the pore-forming agent and the plasticizer into a screw mixing module through a feeder, and extruding the obtained blend B into fiber filaments through a spinneret after the mixture is melted and mixed uniformly; the spinneret is a round or circular spinneret, the inner diameter and the outer diameter of the spinneret are adjusted according to the particle size of the required titanium-based lithium adsorbent, and the cooling medium or core liquid (if the hollow rod-shaped lithium adsorbent is required to be prepared) is air.
In some embodiments, in the melt extrusion spinning process of step 2), the melt mixing and extrusion temperature of blend B is 120-250 ℃ (e.g., 125 ℃, 130 ℃, 150 ℃, 180 ℃, 200 ℃, 240 ℃);
in some embodiments, step 2) stretching the fiber obtained by melt extrusion spinning in the length direction by 1.5-4 times (e.g., 2 times, 2.5 times, 3 times, 3.5 times), and then performing heat setting;
in some embodiments, the process conditions of step 2) of heat setting include: the temperature is 100-150 ℃ (e.g. 105 ℃, 110 ℃, 120 ℃, 140 ℃) and the time is 1-5 h (e.g. 1.5h, 2h, 2.5h, 3h, 4 h).
In some embodiments, in step 2), the extraction is performed after the heat setting is completed, and the extractant used is ethanol; the extraction time may be 2-6 h (e.g., 3h, 4h, 5 h).
In the step 2), the extraction step and the water washing step can be carried out by using a method conventional in the art; the granulation of the titanium-based lithium adsorbent may be performed using a device conventional in the art such as a granulator or the like. It is known to those of ordinary skill in the art that the extraction, water washing, and granulation steps described above do not affect the inherent properties of the high performance titanium-based lithium adsorbent.
Without being bound by any theory, the pore-forming and mechanical property enhancing process in step 2) of the present invention can be understood as: the melt mixing temperature is raised to be higher than the melting point of the skeleton resin, the plasticizer, the pore-forming agent and the modified precursor powder are mixed to form uniform casting solution, the uniform casting solution is extruded by a spinneret, and the casting solution is subjected to thermally induced phase separation under the cooling effect of an air bath to form a two-phase structure with the skeleton resin as a continuous phase and the plasticizer, the pore-forming agent and the modified precursor powder as a dispersed phase; and meanwhile, under the action of stretching and heat setting, the skeleton resin polymer is subjected to crystal form transformation, so that the mechanical property is improved.
During post-treatment, the plasticizer and the pore-forming agent can be removed through extraction and water washing, and the porous and mechanically-enhanced fiber thread-shaped titanium-based lithium adsorbent is obtained.
In a third aspect, there is provided the use of a titanium-based lithium adsorbent as described above or a titanium-based lithium adsorbent prepared by a preparation method as described above in extraction of lithium ions in brine (particularly salt lake brine).
In the invention, the application of the titanium-based lithium adsorbent in extracting lithium ions from brine (especially salt lake brine) can be realized by conventional processes and conventional equipment in the field, and the description is omitted here.
The invention has the advantages that:
(1) According to the invention, the buffer is added in the process of modifying the titanium-series lithium adsorbent precursor powder, so that the surface of the titanium-series lithium adsorbent precursor can be coated with the polymer chain segment with the acid-base buffer function, the adsorption performance and acid resistance of the titanium-series lithium adsorbent are enhanced, and the dissolution loss is obviously reduced while the adsorption performance is improved;
(2) The porous titanium-based lithium adsorbent is prepared based on the thermally induced phase separation principle, so that the adsorption/desorption rate of the adsorbent can be improved, and meanwhile, the mechanical property of the framework structure of the adsorbent is improved and the long-period wear resistance of the adsorbent is improved through the cooperation of stretching and heat setting procedures;
(3) The preparation process of the titanium-series lithium adsorbent is simple and convenient, and the used diluent and plasticizer can be recycled.
Based on the beneficial effects, the adsorption performance, the dissolution loss resistance and the wear resistance of the titanium-based lithium adsorbent prepared by the method can be obviously improved, and the titanium-based lithium adsorbent is particularly suitable for application scenes such as alkaline brine lithium extraction and lithium precipitation mother liquor recovery.
Detailed Description
So that the technical features and content of the present invention can be understood in detail, preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention have been described in the examples, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer.
< source of raw materials >
The starting materials used in the following examples and comparative examples were all purchased from enokay.
Instrument information used in the examples:
the particle diameters of the titanium-based lithium adsorbent precursor powder and the titanium-based lithium adsorbent are measured by an image-based particle sizer (dandong Baite BT-2900); the lithium ion concentration in the saturated lithium adsorption capacity test and the titanium ion concentration in the dissolution loss rate test of the adsorbent are measured by an inductively coupled plasma emission spectrometer (Agilent 720-OES).
< Performance test >
(1) Saturated lithium adsorption amount test of adsorbent: placing the adsorbent 1.0 mL to be detected in 100 mL brine, oscillating and adsorbing 16 h, respectively measuring the lithium ion content in the brine before and after adsorption, and calculating the saturated lithium adsorption capacity of the adsorbent according to the following formula:
wherein:
q, saturated lithium adsorption capacity of the adsorbent, g/L;
C 0 -lithium ion content in brine before adsorption, g/L;
C A the lithium ion content in the brine after adsorption, g/L;
V B brine volume, i.e. 100 mL;
V A -adsorbent volume, i.e. 1.0 mL;
(2) And (3) testing the dissolution loss rate of the adsorbent: taking 50 mL to-be-detected adsorbent, weighing the mass, loading the adsorbent into a column, allowing brine to pass through an adsorbent bed layer in the column at a flow rate of 4 BV/h and adsorb 4h, washing with water for 10 min, desorbing 2h by using 0.1 mol/L hydrochloric acid as a desorption solution at a flow rate of 2 BV/h, and determining the concentration of titanium ions in the desorption solution; the cycle was repeated for 100 cycles in this operation, and the dissolution loss rate of the adsorbent was calculated according to the following formula:
wherein:
d-dissolution loss rate of adsorbent,%/hundred cycles;
C Ti -titanium ion content in the desorption liquid per cycle, g/mL;
V d the volume of desorption liquid per cycle, i.e. 2×50×2=200 mL;
sigma-100 cycle accumulation;
m A mass of adsorbent before adsorption, g;
M Ti the mass fraction of titanium element in the adsorbent (calculated according to the composition and the proportion of the titanium-series lithium adsorbent precursor powder in the adsorbent);
(3) Wear rate test of adsorbent: taking 50 mL to-be-measured adsorbent, loading the adsorbent into a column after weighing the mass, testing the adsorbent under the same conditions as the dissolution loss rate test of the adsorbent, and circulating for 100 periods, taking out the adsorbent, weighing the mass, and calculating the wear rate of the adsorbent according to the following formula:
wherein:
a-the attrition rate of the adsorbent,%/hundred cycles;
m 0 mass of adsorbent before adsorption, g;
m 100 the mass of the adsorbent after 100 cycles of adsorption, g.
The main components of the tibetan bunyae salt lake brine system used below are shown in Table 1.
TABLE 1 composition of main components in salt lake brine
| Li/ppm | Na/ppm | K/ppm | Mg/ppm | (sulfate radical) SO42-/ppm | B/ppm | (chloride ions) Cl-/ppm | (carbonate) CO32-/ppm |
| 1000 | 90000 | 30000 | 20 | 5600 | 1300 | 165000 | 13000 |
Example 1
The titanium-based lithium adsorbent precursor powder is obtained by adopting a high-temperature solid phase method, and the specific operation process comprises the following steps: with TiO 2 Is a titanium source, liOH is a lithium source, and TiO is controlled 2 The molar ratio of/LiOH was 1:2, and the two were mixed and then calcined under a nitrogen atmosphere at 750℃for 6 h to give (Li 2 TiO 3 ) The titanium lithium adsorbent precursor powder is crushed and sieved, and the particle size of the powder is 8 mu m.
The preparation method of the titanium-based lithium adsorbent comprises the following steps:
(1) Adding the titanium-series lithium adsorbent precursor powder 100 g, N-2-aminoethyl-3-aminopropyl methyl methoxysilane 0.5 g, ditriethanolamine diisopropyl titanate 0.5 g, polyacrylic acid (with the polymerization degree of 15) 10 g and ethanol 75 g which are prepared in the above way into a stirrer, mechanically stirring and uniformly dispersing to obtain a pasty blend A, and then drying the blend A at 60 ℃ for 4h to obtain modified titanium-series lithium adsorbent precursor powder;
(2) Adding the modified titanium lithium adsorbent precursor powder 100 g obtained in the step (1) and polyvinylidene fluoride (with the weight average molecular weight of 500,000 daltons) 25g, polyethylene glycol 10 g, sodium chloride 5g and dibutyl phthalate 75 g into a mixing module of screw extrusion spinning equipment, uniformly mixing to obtain a blend B, and carrying out melt mixing and extrusion at 180 ℃; extruding and spinning the blend B through a circular spinneret (with the outer diameter of 1 mm and the inner diameter of 0.5 mm), and taking air as a cooling medium or core liquid; stretching the extruded fiber yarn in the length direction for 2 times, and performing heat setting at 125 ℃ for 2.5-h; after the heat setting is finished, 3h is extracted by ethanol, and then is washed by water and granulated, the hollow rod-shaped high-performance titanium-based lithium adsorbent with the average particle size of 1 mm is obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 20g/L, the dissolution loss rate is 0.02 percent/hundred cycles, and the abrasion rate is 0.05 percent/hundred cycles.
Example 2
The procedure for the preparation of the titanium-based lithium adsorbent was as described in example 1, except that: the buffer in step (1) was replaced with polymethacrylic acid (degree of polymerization 30) in an amount of 5g (i.e., 5% of the mass of the precursor powder); the backbone resin in step (2) was replaced with polyvinyl chloride (weight average molecular weight 300,000 daltons) in an amount of 100 g; the remainder was the same as in example 1.
A hollow rod-shaped high-performance titanium-based lithium adsorbent having an average particle diameter of 2mm was obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 50wt%, and the content of the skeleton resin is 50wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 15 g/L, the dissolution loss rate is 0.05%/hundred cycles, and the abrasion rate is 0.01%/hundred cycles.
Example 3
The procedure for the preparation of the titanium-based lithium adsorbent was as described in example 1, except that: the addition amount of polyacrylic acid in the step (1) is changed to 20g (namely, 20% of the mass of the precursor powder); the backbone resin in step (2) was replaced with chlorinated polyvinyl chloride (weight average molecular weight 700,000 daltons) in an amount of 66.7, 66.7 g; the remainder was the same as in example 1.
A hollow rod-shaped high-performance titanium-based lithium adsorbent having an average particle diameter of 0.5. 0.5 mm was obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 60wt%, and the content of the skeleton resin is 40wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 18g/L, the dissolution loss rate is 0.01 percent/hundred cycles, and the abrasion rate is 0.1 percent/hundred cycles.
Example 4
The procedure for the preparation of the titanium-based lithium adsorbent was as described in example 1, except that: adding the materials in the step (2) into a mixing module of screw extrusion spinning equipment, wherein the melting mixing temperature is 120 ℃; the remaining steps were the same as in example 1.
A solid rod-shaped high-performance titanium-based lithium adsorbent having an average particle diameter of 1.5. 1.5mm was obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%;
under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 16g/L, the dissolution loss rate is 0.02 percent/hundred cycles, and the abrasion rate is 0.03 percent/hundred cycles.
Example 5
The procedure for the preparation of the titanium-based lithium adsorbent was as described in example 1, except that: adding the materials in the step (2) into a mixing module of screw extrusion spinning equipment, wherein the melting mixing temperature is 240 ℃; the remaining steps were the same as in example 1.
A hollow rod-shaped high-performance titanium-based lithium adsorbent having an average particle diameter of 0.8. 0.8mm was obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%.
Under the tibetan and Buyer salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 17 g/L, the dissolution loss rate is 0.03 percent/hundred cycles, and the abrasion rate is 0.005 percent/hundred cycles.
Example 6
The procedure for the preparation of the titanium-based lithium adsorbent was as described in example 1, except that: stretching the fiber obtained by melt extrusion in the step (2) for 4 times in the length direction, and then performing heat setting; the heat setting temperature is 150 ℃ and the heat setting time is 1 h; the remaining steps were the same as in example 1.
A hollow rod-shaped high-performance titanium-based lithium adsorbent having an average particle diameter of 1 mm was obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 16g/L, the dissolution loss rate is 0.04 percent/hundred cycles, and the abrasion rate is 0.05 percent/hundred cycles.
Comparative example 1
A method for preparing titanium-based lithium adsorbent precursor powder was the same as in example 1.
The preparation method of the titanium-based lithium adsorbent comprises the following steps:
(1) Adding the titanium-series lithium adsorbent precursor powder 100 g, N-2-aminoethyl-3-aminopropyl methyl methoxysilane 0.5 g, ditriethanolamine diisopropyl titanate 0.5 g and ethanol 75 g prepared in the above manner into a stirrer, mechanically stirring and uniformly dispersing to obtain a pasty blend A, and then drying the pasty blend A at 60 ℃ for 4h to obtain modified titanium-series lithium adsorbent precursor powder;
(2) Adding the modified titanium lithium adsorbent precursor powder 100 g obtained in the step (1) and polyvinylidene fluoride (with the weight average molecular weight of 500,000 daltons) 25g, polyethylene glycol 10 g, sodium chloride 5g and dibutyl phthalate 75 g into a mixing module of screw extrusion spinning equipment, uniformly mixing to obtain a blend B, and carrying out melt mixing and extrusion at 180 ℃; extruding and spinning the blend B through a circular spinneret (with the outer diameter of 1 mm and the inner diameter of 0.5 mm), and taking air as a cooling medium or core liquid; stretching the extruded fiber yarn in the length direction for 2 times, and performing heat setting at 125 ℃ for 2.5-h; after the heat setting is finished, 3h is extracted by ethanol, and then is washed by water and granulated, the hollow rod-shaped high-performance titanium-based lithium adsorbent with the average particle size of 1 mm is obtained.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 10 g/L, the dissolution loss rate is 5%/hundred cycles, and the abrasion rate is 0.05%/hundred cycles.
Comparative example 2
A method for preparing titanium-based lithium adsorbent precursor powder was the same as in example 1.
The preparation method of the titanium-based lithium adsorbent comprises the following steps:
(1) Adding the titanium-series lithium adsorbent precursor powder 100 g, N-2-aminoethyl-3-aminopropyl methyl methoxysilane 0.5 g, ditriethanolamine diisopropyl titanate 0.5 g, polyacrylic acid (with the polymerization degree of 15) 10 g and ethanol 75 g which are prepared in the above way into a stirrer, mechanically stirring and uniformly dispersing to obtain a pasty blend A, and then drying the blend A at 60 ℃ for 4h to obtain modified titanium-series lithium adsorbent precursor powder;
(2) Adding the modified titanium lithium adsorbent precursor powder 100 g obtained in the step (1) and polyvinylidene fluoride (with the weight average molecular weight of 500,000 daltons) 25g, polyethylene glycol 10 g, sodium chloride 5g and dibutyl phthalate 75 g into a mixing module of screw extrusion spinning equipment, uniformly mixing to obtain a blend B, and carrying out melt mixing and extrusion at 180 ℃; extruding and spinning the blend B through a circular spinneret (with the outer diameter of 1 mm and the inner diameter of 0.5 mm), and taking air as a cooling medium or core liquid; the extruded filaments were cooled, extracted with ethanol 3h, washed with water, and granulated to obtain a hollow rod-shaped titanium-based lithium adsorbent having an average particle diameter of 1 mm.
In the prepared high-performance titanium-based lithium adsorbent, the content of the modified precursor powder is 80wt%, and the content of the skeleton resin is 20wt%.
Under the Tibet zabuyen salt lake brine system, the saturated lithium adsorption capacity of the obtained titanium-based lithium adsorbent is 15 g/L, the dissolution loss rate is 1%/hundred cycles, and the abrasion rate is 1%/hundred cycles.
As can be seen from the test results of each example and comparative example, compared with comparative examples 1-2, the method of the invention has the advantages that the titanium-based lithium adsorbent precursor powder is modified, the buffer is selectively added and the dosage is controlled in a proper range, so that the adsorption effect of the adsorbent can be enhanced, the stability of the adsorbent in an acidic desorption environment is improved, and the dissolution loss is reduced; in addition, the porous titanium-based lithium adsorbent is prepared based on the thermally induced phase separation principle, so that the adsorption/desorption rate of the adsorbent can be improved, and meanwhile, the mechanical property of the framework structure of the adsorbent is improved and the long-period wear resistance of the adsorbent is improved through the cooperation of stretching and heat setting procedures; the titanium-based lithium adsorbent of each example has excellent adsorption performance, dissolution loss resistance and abrasion resistance, and the comprehensive performance is remarkably improved.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the spirit of the invention.
Claims (17)
1. The preparation method of the high-performance titanium-based lithium adsorbent is characterized by comprising the following steps of:
1) Uniformly dispersing titanium lithium adsorbent precursor powder, a coupling agent and a buffering agent in a diluent to obtain a blend A, and drying the blend A to obtain modified precursor powder;
2) And (3) uniformly mixing the modified precursor powder obtained in the step (1) with the skeleton resin, the pore-forming agent and the plasticizer to obtain a blend B, carrying out melt extrusion spinning on the blend B, and carrying out stretching, heat setting, extraction and water washing and granulating to obtain high-performance titanium lithium adsorbent particles.
2. The method of claim 1, wherein the titanium-based lithium adsorbent precursor powder is selected from lithium titanium oxide-based lithium adsorbents; the particle size of the titanium lithium adsorbent precursor powder is 1-15 mu m; and/or
The coupling agent is selected from an amino silane coupling agent or a compound of an epoxy silane coupling agent and a chelate titanate coupling agent.
3. The method according to claim 2, wherein the titanium-based lithium adsorbent precursor powder is selected from Li 2 TiO 3 、Li 1.33 Ti 1.66 O 4 、Li 4 Ti 5 O 12 One or more of the following.
4. The preparation method according to claim 2, wherein the aminosilane coupling agent or epoxy-type silane coupling agent is selected from one or more of N-2-aminoethyl-3-aminopropyl methyl methoxy silane, N-2-aminoethyl-3-aminopropyl methyl ethoxy silane, 3-diethylenetriamine propyl methyl methoxy silane, 3-glycidoxypropyl ethoxy silane and 3-glycidoxypropyl methoxy silane; and/or
The chelate titanate coupling agent is selected from one or more of ditrienolamine diisopropyl titanate, di (acetoacetic acid ethyl ester) di-n-butoxy titanate, di (acetoacetic acid ethyl ester) diisobutyl titanate, di (acetoacetonyl) ethoxyisopropoxy titanate and di (acetoacetonyl) diisopropyl titanate; and/or
The mass ratio of the amino silane coupling agent or the epoxy silane coupling agent to the chelating titanate coupling agent is 2:1-1:2.
5. The method according to claim 1, wherein the mass ratio of the coupling agent to the titanium-based lithium adsorbent precursor powder is 0.5% -2%.
6. The method according to claim 1, wherein the buffer is selected from the group consisting of polycarboxy polymers having a degree of polymerization of 5 to 30.
7. The method of claim 6, wherein the buffer is one or more selected from the group consisting of polyacrylic acid, polymethacrylic acid, and polymaleic acid.
8. The method according to claim 1, wherein the mass ratio of the buffer to the titanium-based lithium adsorbent precursor powder is 5% -20%.
9. The method of claim 1, wherein the diluent is selected from one or more of ethanol, isopropanol, a mixture of water and ethanol, and a mixture of water and isopropanol.
10. The method according to claim 1, wherein the mass ratio of the diluent to the titanium-based lithium adsorbent precursor powder is 1:2 to 1:1.
11. The method according to claim 1, wherein the skeletal resin is selected from one or more of polyvinyl chloride, chlorinated polyvinyl chloride, polyvinylidene fluoride, polymethyl methacrylate, polyethylene, and polypropylene; and/or
The pore-forming agent is selected from a complex of a water-soluble polymer and a water-soluble inorganic salt; and/or
The plasticizer is selected from phthalate esters.
12. The method of claim 11, wherein the backbone resin has a weight average molecular weight of 300,000 to 700,000 daltons; and/or
In the compound of the water-soluble polymer and the water-soluble inorganic salt, the water-soluble polymer is selected from one or more of polyethylene glycol, polyvinylpyrrolidone and polyvinyl alcohol; the water-soluble inorganic salt is selected from one or more of sodium chloride, lithium chloride, potassium chloride and calcium chloride; the mass ratio of the water-soluble polymer to the water-soluble inorganic salt is 2:1-1:2; and/or
The plasticizer is selected from one or more of dibutyl phthalate, dioctyl phthalate, dimethyl isophthalate and dioctyl terephthalate.
13. The preparation method according to claim 1, wherein the following components are used in the blend B in an amount of 100wt% based on the total weight of the blend B:
25-60 wt% of modified precursor powder,
10 to 37.5 weight percent of skeleton resin,
5-10wt% of pore-forming agent,
20-40 wt% of plasticizer.
14. The method according to any one of claims 1 to 13, wherein in the melt-extrusion spinning process of step 2), the melt-mixing and extrusion temperature of blend B is 120 to 250 ℃; and/or
Stretching the fiber yarn obtained by melt extrusion spinning in the length direction for 1.5-4 times, and performing heat setting; and/or
The heat setting process conditions comprise: the temperature is 100-150 ℃ and the time is 1-5 h.
15. The method according to any one of claims 1 to 13, wherein the extractant used in the extraction after completion of the heat setting is ethanol.
16. A high-performance titanium-based lithium adsorbent, characterized in that the titanium-based lithium adsorbent is a product produced by the production method according to any one of claims 1 to 15;
the titanium-based lithium adsorbent is one or more of solid rod-shaped and hollow rod-shaped, and the average particle size is 0.5-2 mm;
the saturated lithium adsorption capacity of the titanium-based lithium adsorbent is more than or equal to 15 g/L; the dissolution loss rate is less than or equal to 0.05 percent/hundred cycles; the abrasion rate is less than or equal to 0.1 percent/hundred cycles.
17. Use of the titanium-based lithium adsorbent produced by the production method according to any one of claims 1 to 15 or the titanium-based lithium adsorbent according to claim 16 for extracting lithium ions from brine.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955210A (en) * | 2010-09-14 | 2011-01-26 | 华东理工大学 | Granular lithium ion sieve |
| CN111905700A (en) * | 2020-08-24 | 2020-11-10 | 中蓝长化工程科技有限公司 | Resin-based inorganic nanoparticle composite lithium extraction particle |
| CN113996274A (en) * | 2021-11-09 | 2022-02-01 | 万华化学集团股份有限公司 | Porous composite lithium adsorbent and preparation method thereof |
| CN114345291A (en) * | 2021-11-15 | 2022-04-15 | 成都开飞高能化学工业有限公司 | Preparation method of granular titanium-based lithium ion sieve adsorbent with high adsorption capacity |
| CN116159531A (en) * | 2022-12-20 | 2023-05-26 | 浙江工业大学 | Preparation method of hollow fiber membrane lithium ion adsorbent |
| EP4209266A1 (en) * | 2020-12-22 | 2023-07-12 | Tianjin University Of Science And Technology | Preparation method for porous spinning composite material, and application thereof in lithium extraction |
| CN116809013A (en) * | 2023-07-07 | 2023-09-29 | 万华化学集团股份有限公司 | Titanium lithium ion sieve particle and preparation method thereof |
-
2023
- 2023-11-28 CN CN202311603408.3A patent/CN117299098B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955210A (en) * | 2010-09-14 | 2011-01-26 | 华东理工大学 | Granular lithium ion sieve |
| CN111905700A (en) * | 2020-08-24 | 2020-11-10 | 中蓝长化工程科技有限公司 | Resin-based inorganic nanoparticle composite lithium extraction particle |
| EP4209266A1 (en) * | 2020-12-22 | 2023-07-12 | Tianjin University Of Science And Technology | Preparation method for porous spinning composite material, and application thereof in lithium extraction |
| CN113996274A (en) * | 2021-11-09 | 2022-02-01 | 万华化学集团股份有限公司 | Porous composite lithium adsorbent and preparation method thereof |
| CN114345291A (en) * | 2021-11-15 | 2022-04-15 | 成都开飞高能化学工业有限公司 | Preparation method of granular titanium-based lithium ion sieve adsorbent with high adsorption capacity |
| CN116159531A (en) * | 2022-12-20 | 2023-05-26 | 浙江工业大学 | Preparation method of hollow fiber membrane lithium ion adsorbent |
| CN116809013A (en) * | 2023-07-07 | 2023-09-29 | 万华化学集团股份有限公司 | Titanium lithium ion sieve particle and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 纳米纤维锂离子筛吸附剂的制备及表征;王涛;《无机盐工业》;第48卷(第3期);第29-33页 * |
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