METHOD FOR CLEANING PARAFFIN HYDROCARBONS C FROM SULFUR COMPOUNDS AND MOISTURE Russian patent published in 2018 - IPC C07C7/06 C07C9/18 

FIELD: technological processes.

SUBSTANCE: invention relates to a process for purifying paraffin hydrocarbons C₅ from sulfur compounds and moisture azeotropic rectification. Process is characterized in that the paraffinic hydrocarbons C₅ is mixed with the butane fraction in an amount necessary to prepare a mixture containing 5–14 mass% of n-butane, and the resultant mixture is subjected to a single-stage azeotropic rectification in a column with not less than 40 theoretical trays at an overpressure of 0.2–0.8 MPa, with separation from the top of the column as an azeotrope of n-butane with sulfur compounds and moisture, and from the cube of the column of the purified fraction of paraffinic hydrocarbons C₅ with a sulfur content of not more than 0.0001 % by weight and lack of moisture.

EFFECT: invention solves the technical problem of developing a process for purifying paraffinic hydrocarbons C₅ (both in an individual form and as a mixture of pentane and isopentane) from sulfur compounds and moisture azeotropic rectification.

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