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

Patent metadata

Field	Value
Publication number	US-2024124987-A1
Application number	US-202318395422-A
Country	US
Kind code	A1
Filing date	Dec 22, 2023
Priority date	Mar 14, 2019
Publication date	Apr 18, 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 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 HCl, 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

• 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