FIELD: chemistry.
SUBSTANCE: invention relates to a method of processing hydrogen in the purification unit of a terephthalic acid purification device. The method is carried out by cooling and decompressing uncondensed gases released during crystallisation and flash evaporation to remove water vapour and process hydrogen. The uncondensed gases are cooled and decompressed using steps given in claim 1 of the invention. The invention also relates to an apparatus designed to carry out said method. The apparatus has a hydrogen compressor and equipment for reducing temperature and pressure. The inlet channel of the equipment for reducing temperature and pressure is connected to the outlet channel for uncondensed gases from a crystalliser group and its outlet channel is connected to the inlet channel of the hydrogen compressor; the equipment for reducing temperature and pressure has a heater group, a first flow limiter, a second heat-exchanger, a second flow limiter and a third heat-exchanger.
EFFECT: low power consumption when processing hydrogen in the purification unit of a terephthalic acid purification device.
7 cl, 1 dwg
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