Patent ID: 8246722

Claim:
A process for the removal of acid gas from a fluid stream, comprising the steps of: crushing a composition comprising expansive clay and an iron mineral so as to produce crushed expansive clay and iron mineral composition; sifting the crushed expansive clay and iron mineral composition so as to produce a sifted expansive clay and iron mineral composition, said sifted expansive clay and iron mineral composition having particle sizes between 50 μm and 150 μm; calcinating the sifted expansive clay and iron mineral composition at a temperature of between 500° C. and 600° C. so as to produce a sorbent comprising the calcined expansive clay and iron mineral composition; and contacting the sorbent with the fluid stream so as to produce a treated fluid stream having a reduced acid gas content; wherein the contacting step produces a spent sorbent, and wherein the process further comprises: treating the spent sorbent with hydrogen peroxide so as to produce a treated sorbent; and re-contacting the treated sorbent with the fluid stream.