| abstract |
The invention is particularly suitable for the purification of natural gases, which in addition to hydrogen sulfide also in small amounts containing methyl, ethyl, n-propyl and n-butylmercaptans can be removed with. The inventive method works on the principle of cyclic adsorption and desorption, being used as adsorbent zeolitic molecular sieves of the A-type, initially loaded at temperatures between 573 K and 673 K with normal paraffins and then with ammonia and optionally at temperatures below 373 K. have been treated with water, such containing gases or aqueous solutions of alkaline earth salts. The process is particularly to operate with molecular sieves that were already used for the adsorptive dewaxing of diesel oil and expanded after exhaustion of the corresponding Adsorptionskapazitaet and are usually discarded. |