Patent ID: 7342145

Claim:
A process for refining liquefied petroleum gas in a commercial scale, comprising: in the absence of alkali, passing the liquefied petroleum gas after alcohol amino treatment through a desulfurizer comprising an effective component selected from the group consisting of a Fe—Ca oxide and a Fe—Ca oxide hydrate for performing fine desulfurization, and a catalyst set in a fixed bed reactor comprising an active component selected from the group consisting of a Fe—Ca oxide and a Fe—Ca oxide hydrate for performing mercaptan conversion, wherein hydrogen sulfide in the liquefied petroleum gas reacts with the effective component and the resultants adhere on the desulfurizer during the fine desulfurization, and mercaptans in the liquefied petroleum gas react with residual trace amount of air in the liquefied petroleum gas under the action of the catalyst to form disulfides during the mercaptan conversion; flowing the formed disulfides together with the liquefied petroleum gas out of the fixed bed reactor; and treating the liquefied petroleum gas after mercaptan conversion by rectification to obtain a refined liquefied petroleum gas product.