초록 ▼

The present invention is a process for reversibly absorbing acid gases, such as CO2, H2S, SO2, HCN and the like from gas mixtures. The gas mixture containing one or more of these acid gases is contacted with a hydrated salt of the composition Axm+Byn-.rH2O wherein Am+is a cation, Bn-is the conjugate

The present invention is a process for reversibly absorbing acid gases, such as CO2, H2S, SO2, HCN and the like from gas mixtures. The gas mixture containing one or more of these acid gases is contacted with a hydrated salt of the composition Axm+Byn-.rH2O wherein Am+is a cation, Bn-is the conjugate base of a weak acid having a pKa corresponding to an ionization constant of the acid greater than 3 as measured in dilute aqueous solution, m and n are independently integers from 1-4, x and y are integers such that the ratio of x to y provides a neutral salt and r is any number greater than zero up to the maximum number of moles of water which can be bound to the salt. The salt hydrate reversibly absorbs the acid gas from the gas mixture.

대표청구항 ▼

A process for removing acid gases selected from the group consisting of CO2, H2S, SO2, HCN, and COS from a gas mixture containing one or more of said acid gases and at least one other component, said process comprising: bringing said gas mixture into contact with a hydrated salt of the composition A

A process for removing acid gases selected from the group consisting of CO2, H2S, SO2, HCN, and COS from a gas mixture containing one or more of said acid gases and at least one other component, said process comprising: bringing said gas mixture into contact with a hydrated salt of the composition Axm+Byn-�2O wherein Am+is a cation, Bn-is the conjugate base of a weak acid having a pKa corresponding to an ionization constant of the acid greater than 3 as measured in dilute aqueous solution, m and n are independently integers from 1-4, x and y are integers such that the ratio of x to y provides a neutral salt and r is any number greater than zero up to the maximum number of moles of water which can be bound to the salt; and carrying out said process at a temperature from 0°to 200°C. whereby said salt hydrate reversibly absorbs said acid gases thereby removing them from the gas mixture.