METHOD OF PRODUCTION OF DIESEL FUEL Russian patent published in 1995 - IPC

FIELD: petroleum refining. SUBSTANCE: invention consists in electric demineralization of various petroleums in electric dehydrator with a system of electrodes located at two levels, the height gradient between them being within 0.05 to 0.1 of the relative path section coinciding with the mean vector of petroleum current in the zone the maximum midsection. After demineralization the petroleum current is fed to the atmospheric distillation column with a pack of nozzles and two branch pipes tangentially arranged in the column body. The column is provided with an internal cylindrical current deflector, whose diameter matches up with the body diameter in the feed zone as (0.59-0.75) to 1, and the height range of the petroleum currents inlet makes up 0.21-0.28 of the column height from the column bottom base. Withdrawal of kerosine fraction at 240 to 350 C is conducted in the column height range equal to (0.32-0.62) counting from the column bottom base. The obtained diesel fraction is alkalinized with a 3 to 5-% solution of NaOH in two reactors in two stages. The first stage is conducted by injection of alkali, the obtained mixture is introduced into the bottom layer of NaOH, and the second stage is conducted with employment of mother liquor. Blending of diesel fuel is conducted in two stages of mixing with straight-run and/or hydrofined kerosine fractions. EFFECT: facilitated procedure. 50 cl, 5 tbl, 6 dwg