Patent · US Active

Process and device for carbonating concrete waste and/or sequestering CO2

US11753340B2 · kind B2 · utility

0Cited by

1References

23Claims

0Family size

Assignee

HCONNECT 2 GMBH · DE

Inventors

Jan SKOCEK · Leimen, DE
Maciej ZAJAC · Heidelberg, DE
Mohsen BEN HAHA · Heidelberg, DE
Stefan Federhen · Frankfurt, DE
Marek Majchrowicz · Olszowa, PL

Key dates

Filing date	May 25, 2020
Grant date	Sep 12, 2023
Priority date	—
Expiry date	Nov 9, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/18
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for manufacturing supplementary cementitious material and sequestering CO2 by carbonating concrete fines has the following steps: grinding the concrete fines obtained from crushed concrete demolition waste in a mill at a temperature from 1 to 10° C. above the water dew point in a carbonating atmosphere provided by a gas containing from 10 to 99 Vol.-% CO2, circulating the ground and partially carbonated concrete fines in a fluidized bed reactor in contact with the carbonating atmosphere, and withdrawing decarbonated gas and carbonated concrete fines.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.