US 11,980,866 B2 · Ceramic material for the absorption of carbon dioxide, production process, processes for the regeneration of carbon dioxide and of the ceramic material, and uses

Abstract

The present invention describes the process of preparing ceramic materials for absorption of acidic gases, mainly carbon dioxide, in exhaust systems and/or present indoors. Ceramic materials are formed by a mixture of alkali carbonate with alkaline earth metal oxide/hydroxide associated with a binding component, but non-limiting. The alkali carbonate comprises sodium, potassium carbonate, or a mixture of both. The alkaline earth metal oxide/hydroxide may be formed from magnesium oxide or magnesium hydroxide as well as calcium oxide and/or calcium hydroxide.

Claims17

Dependent claims

A process for producing a ceramic material, comprising the following steps:

(a) solubilizing 23 to 360 g of alkali carbonate in 500 to 1,000 mL of water, wherein the alkali carbonate is Na2CO3, K2CO3, or a combination thereof;
(b) adding 200 to 800 g of alkaline earth metal oxide or hydroxide;
(c) adding a binding agent to form a mixture;
(d) homogenizing the mixture obtained in step (c) for 5 to 30 minutes to form a clay;
(e) removing, and optionally molding the clay obtained in step (d) for 1 to 3 hours;
(f) drying the clay at a temperature from 50° C. to 150° C., preferably 80° C., for a period of 3 to 48 hours.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/417,944Filed 19 Dec 2019

Priority

BR 102018077336-427 Dec 2018

Published

US 2022/0072504 A110 Mar 2022

Granted

14 May 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification37 codes

B01J 20/043
Comprising compounds of alkali metals, alkaline earth metals or magnesium: carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
B01D 53/62
Removing components of defined structure: carbon oxides
B01D 53/82
Solid phase processes: with stationary reactants
B01D 53/83
Solid phase processes: with moving reactants

Ceramic material for the absorption of carbon dioxide, production process, processes for the regeneration of carbon dioxide and of the ceramic material, and uses

Life of this patent

Ceramic material for the absorption of carbon dioxide, production process, processes for the regeneration of carbon dioxide and of the ceramic material, and uses

Life of this patent

Abstract

Claims17