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

Patent metadata

Field	Value
Publication number	US-12252795-B2
Application number	US-202318395422-A
Country	US
Kind code	B2
Filing date	Dec 22, 2023
Priority date	Mar 14, 2019
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

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 and a base via electrolysis;
dissolving a material comprising calcium and silicon using the acid to produce ions comprising calcium in a region with a pH of 6 or less;
precipitating calcium hydroxide from the ions comprising calcium using the base in a region with a pH of 10 or higher; and
forming a cement with the calcium hydroxide.

2. The method of claim 1 , wherein the acid and/or base are stored prior to being used in dissolution and/or precipitation reactions.

3. The method of claim 1 , wherein the acid and/or base are produced in a system of reactors, while the dissolution and/or precipitation occur in a separate reactor or system of reactors.

4. The method of claim 1 , wherein dissolving the material using the acid to produce calcium ions comprises using the acid to dissolve metals from the material.

5. The method of claim 4 , wherein dissolving the material using the acid comprises capturing CO 2 from the dissolution of a carbonate in the acid.

6. The method of claim 1 , wherein forming the cement with the calcium hydroxide comprises mixing the calcium hydroxide with an aluminate, a silicate, and/or a pozzolanic material.

7. The method of claim 6 , wherein forming the cement comprises mixing the calcium hydroxide with the silicate.

8. The method of claim 6 , wherein forming the cement comprises mixing the calcium hydroxide with the pozzolanic material.

9. The method of claim 1 , wherein producing the acid and base via electrolysis comprises:
forming a dihalide in a first reactor; and
reacting the dihalide in a second reactor.

10. The method of claim 9 , wherein the dihalide is Cl 2 .

11. The method of claim 9 , wherein:
forming the dihalide in the first reactor comprises electrolytically forming the dihalide and hydrogen gas;
reacting the dihalide in the second reactor comprises reacting the dihalide with the hydrogen gas to form a hydrogen halide.

12. The method of claim 11 , wherein the hydrogen halide comprises HCI, HBr, or HI.

13. The method of claim 11 , further comprising dissolving the hydrogen halide in water to form the acid.

14. The method of claim 1 , wherein the material further comprises at least one of magnesium, aluminum, or iron.

15. The method of claim 14 , wherein dissolving the material produces ions comprising magnesium.

16. The method of claim 13 , further comprising precipitating magnesium hydroxide from the ions comprising magnesium.

17. The method of claim 1 , wherein the cement comprises Pozzolan cement.

18. The method of claim 1 , further comprising mixing the cement with water and an additive to form a concrete.

19. A method, comprising:
electrolytically forming a dihalide and hydrogen gas in a first reactor;
reacting the dihalide with the hydrogen gas to form a hydrogen halide in a second reactor;
dissolving the hydrogen halide in water to form an acid;
dissolving a material comprising calcium and silicon using the acid to produce ions comprising calcium in a region with a pH of 6 or less;
precipitating calcium hydroxide from the ions comprising calcium using a base in a region with a pH of 10 or higher; and
forming a cement with the calcium hydroxide.

20. The method of claim 19 , wherein the dihalide is Cl 2 and the hydrogen halide comprises HCl.

Assignees

• Massachusetts Inst Technology

Inventors

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

Classifications

• C04B7/06 Primary

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

• Y02E60/36

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

• Y02P40/18

  Carbon capture and storage [CCS] · CPC title

• C25B1/22 Primary

  Inorganic acids · CPC title

• C01B13/36 Primary

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