METHOD OF DEEP DRYING AND PURIFICATION FROM SULPHUR COMPOUNDS AND GAS UTILIZATION FOR REGENERATION OF NATURAL AND ASSOCIATED PETROLEUM GAS Russian patent published in 2023 - IPC B01D53/26 B01D53/04 C01B17/16 C10L3/00 

FIELD: gas industry.

SUBSTANCE: invention relates to the preparation of natural and associated petroleum gas, in particular to methods for deep adsorption drying and gas purification from acidic components (mercaptans and hydrogen sulphide), and can be used in the gas, oil, oil refining and petrochemical industries. The method includes adsorption of water vapour and sulphur compounds, regeneration of the adsorbent at an elevated temperature with a reverse flow of purified gas, cooling of the adsorbent to the adsorption temperature and subsequent purification of the regeneration gas. Natural gas is preliminarily separated from the dropping liquid. A single layer of highly effective CaA zeolite is used as an adsorbent. Zeolite regeneration is carried out at reduced pressure and elevated temperature of at least 290°C by a return flow of dried and purified gas. After each interaction with the adsorbent, the purified gas is filtered from adsorbent dust particles. In addition, the regeneration gas is purified from hydrogen sulphide using a non-regenerable adsorbent containing zinc oxide ZnO at a temperature of 300°C or amine solution of DEA in the absorber and are drawn back into the process.

EFFECT: invention makes it possible to reduce the operating costs of the installation, increase the service life of the adsorbent (zeolite), increase the degree of gas purification and drying, reduce the level of explosion and fire hazard, reduce the energy intensity of the process and minimize the emission of sulphur compounds into the atmosphere.

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