Silicates and/or salts and methods of production and uses thereof

Patent metadata

Field	Value
Publication number	US-2025162942-A1
Application number	US-202418406058-A
Country	US
Kind code	A1
Filing date	Jan 5, 2024
Priority date	Feb 10, 2023
Publication date	May 22, 2025
Grant date	—

Abstract

Disclosed herein are silicates and/or salts and methods of production and uses thereof. For example, methods of producing an amorphous silicate and/or a salt from materials comprising silicates are disclosed. As another example, use of silicates and/or salts in the formation of cementitious materials is also disclosed.

First claim

1 . An amorphous silicate, comprising greater than or equal to 10 ppm and less than or equal to 20 wt. % fluoride.

2 - 16 . (canceled)

17 . A method of producing silicate and a salt, comprising:
combining ammonium fluoride and/or ammonium bifluoride with a material comprising silicate in an aqueous combination at a maximum temperature of greater than or equal to 10° C. and less than or equal to 125° C.; and producing silicate and/or a salt; wherein the method produces and/or accumulates less than or equal to 30 ppm hydrogen fluoride.

18 . A method of producing silicate and/or a salt, comprising:
combining ammonium fluoride and/or ammonium bifluoride with a material comprising silicate in an anhydrous combination at a maximum temperature of greater than or equal to 160° C. and less than or equal to 250° C.; and producing silicate and/or a salt; wherein the method produces and/or accumulates less than or equal to 30 ppm hydrogen fluoride.

19 - 20 . (canceled)

21 . The method of claim 17 , wherein the ammonium fluoride and/or bifluoride is combined with the material comprising silicate at a maximum pressure of greater than or equal to 0.1 atm and less than or equal to 100 atm.

22 . (canceled)

23 . The method of claim 17 , wherein the method comprises producing the silicate, wherein the silicate comprises amorphous silicate.

24 . The method of claim 17 , wherein the method comprises producing the salt.

25 . (canceled)

26 . The method of claim 23 , wherein the method further comprises producing a cementitious material comprising the produced amorphous silicate.

27 . The method of claim 17 , wherein the material comprising silicate comprises a crystalline silicate.

28 . The method of claim 17 , wherein the material comprising silicate comprises olivine and/or olivine-type materials, montmorillonite and/or montmorillonite-type materials, kaolinite and/or kaolinite-type materials, halloysite and/or halloysite-type materials, kyanite and/or kyanite-type materials, sillimanite and/or sillimanite-type materials, spodumene and/or spodumene-type materials, petalite and/or petalite-type materials, eucryptite and/or eucryptite-type materials, quartz and/or quartz-type materials, mullite and/or mullite-type materials, zircon and/or zircon-type materials, wollastonite and/or wollastonite-type materials, basalt and/or basalt-type materials, lepidolite and/or lepidolite-type materials, amblygonite and/or amblygonite-type materials, triphylite and/or triphylite-type materials, bikitaite and/or bikitaite-type materials, lithiophilite and/or lithiophilite-type materials, illite and/or illite-type materials, smectite and/or smectite-type materials, jadarite and/or jadarite-type materials, cookeite and/or cookeite-type materials, montebrasite and/or montebrasite-type materials, elbaite and/or elbaite-type materials, zinnwaldite and/or zinnwaldite-type materials, rare earth element (REE) sands, laterite clays, desert sand, ash resulting from fossil fuel combustion (such as bottom ash, ponded ash, fly ash), and/or residue resulting from industrial processes (such as mining tailings and/or bauxite residue).

29 . The method of claim 17 , wherein the method further comprises regenerating the ammonium fluoride and/or ammonium bifluoride.

30 . The method of claim 17 , wherein the material comprising silicate further comprises lithium and/or aluminum.

31 - 33 . (canceled)

34 . The method of claim 44 , wherein the method further comprises producing a cementitious material comprising the aluminum oxide and/or aluminum hydroxide.

35 - 40 . (canceled)

41 . The method of claim 17 , wherein the method comprises only partially reacting and/or partially dissolving the material comprising silicate with the ammonium fluoride and/or ammonium bifluoride.

42 . (canceled)

43 . The method of claim 24 , wherein the salt comprises lithium fluoride, lithium carbonate, lithium hydroxide, lithium chloride, aluminum fluoride, ammonium hexafluoroaluminate, and/or alkali hexafluoroaluminate.

44 . The method of claim 17 , wherein the method further comprises producing aluminum hydroxide and/or aluminum oxide.

45 . The method of claim 44 , wherein the method comprises producing aluminum oxide having a purity greater than or equal to 99% and less than or equal to 100%.

46 . (canceled)

47 . The method of claim 17 , wherein the method produces and/or accumulates substantially no detectable quantities of free HF by fluorine nuclear magnetic resonance ( 19 F NMR) spectroscopy.

48 . The method of claim 17 , wherein the method produces and/or accumulates substantially no observable quantities of HF within 0.1 meters of the process by moistened fluoride ion detection paper with a sensitivity limit of 20 mg/L.

49 . The method of claim 18 , wherein the method comprises producing the silicate, wherein the silicate comprises amorphous silicate.

50 . The method of claim 23 , wherein the amorphous silicate comprises greater than or equal to 1000 ppm total metals and less than or equal to 10,000 ppm total metals.

Assignees

• Massachusetts Inst Technology

Inventors

• Chiang Yet-Ming
• Hunt Camden
• Prawira Jacqueline
• Mowbray Benjamin

Classifications

• C01B33/26

  Aluminium-containing silicates {, i.e. silico-aluminates} · CPC title

• C04B14/045

  Alkali-metal containing silicates, e.g. petalite (waterglass C04B12/04) · CPC title

• C04B14/041

  Aluminium silicates other than clay · CPC title

• C04B14/043

  Alkaline-earth metal silicates, e.g. wollastonite · CPC title

• C01B33/24

  Alkaline-earth metal silicates · CPC title