Chemical reaction devices involving acid and/or base, and related systems and methods

Patent metadata

Field	Value
Publication number	US-2024133054-A1
Application number	US-202318395403-A
Country	US
Kind code	A1
Filing date	Dec 22, 2023
Priority date	Mar 14, 2019
Publication date	Apr 25, 2024
Grant date	—

Abstract

Chemical reaction devices involving acid and/or base, and related systems and methods, are generally described.

First claim

What is claimed is:

1 . A method comprising:
producing an acid; dissolving a material comprising calcium and silicon with the acid to produce calcium ions; treating the calcium ions to produce solid calcium hydroxide and/or calcium oxide; and heating the solid calcium hydroxide and/or calcium oxide in a kiln to produce a cement.

2 . The method of claim 1 , wherein the material comprises a metal oxide comprising calcium and/or silicon.

3 . The method of claim 1 , wherein producing the solid calcium hydroxide and/or calcium oxide comprises producing a byproduct different from the calcium hydroxide and/or calcium oxide.

4 . The method of claim 3 , wherein the material further comprises at least one of the following elements: magnesium, aluminum, or iron.

5 . The method of claim 4 , wherein the byproduct comprises magnesium.

6 . The method of claim 5 , wherein the byproduct comprises magnesium carbonate formed through a reaction with carbon dioxide.

7 . The method of claim 1 , further comprising heating the solid calcium hydroxide and/or calcium oxide with silica and/or alumina in the kiln to produce the cement.

8 . The method of claim 1 , further comprising heating the solid calcium hydroxide and/or calcium oxide with silicate in the kiln to produce the cement.

9 . The method of claim 1 , wherein the cement is Portland cement.

10 . The method of claim 1 , wherein dissolving the material in the acid occurs in a region of a reactor with a pH of 6 or less.

11 . The method of claim 1 , further comprising heating the calcium hydroxide in a heater to convert the calcium hydroxide to calcium oxide.

12 . The method of claim 1 , wherein the acid comprises a hydrogen halide.

13 . The method of claim 12 , wherein the hydrogen halide comprises HCl, HBr, and/or HI.

14 . The method of claim 2 , wherein the metal oxide comprises SiO 2 .

15 . A method comprising:
producing an acid; dissolving a material comprising calcium oxide and silicon oxide with the acid to produce calcium ions; treating the calcium ions to produce solid calcium hydroxide and/or calcium oxide and a byproduct different from the calcium hydroxide and/or calcium oxide; and heating the solid calcium hydroxide and/or calcium oxide with silica, alumina, and/or silicate in a kiln to produce a cement.

16 . The method of claim 15 , wherein the material further comprises at least one of the following elements: magnesium, aluminum, or iron.

17 . The method of claim 16 , wherein the byproduct comprises magnesium.

18 . The method of claim 17 , wherein the byproduct comprises magnesium carbonate formed through a reaction with carbon dioxide.

19 . The method of claim 15 , wherein the cement is Portland cement.

20 . The method of claim 19 , wherein the acid comprises HCl, HBr, and/or HI.

Assignees

• Massachusetts Inst Technology

Inventors

• Chiang Yet-Ming
• Ellis Leah
• Badel Andres
• Metcalt Isaac W

Classifications

• C04B7/06 Primary

  using alkaline raw materials (C04B7/60 takes precedence) · CPC title

• C25B1/22 Primary

  Inorganic acids · CPC title

• C01B13/36 Primary

  by precipitation reactions in {aqueous} solutions {(C01B13/328 takes precedence)} · CPC title

• Y02P40/18

  Carbon capture and storage [CCS] · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title