Process for purifying aromatic hydrocarbons

Details Process for purifying aromatic hydrocarbons Process for purifying aromatic hydrocarbons

1975-09-05

1979-08-28

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208128, 208130, 585486, 585807, 585867, 585901, C10G 928, C10G 944

Patent

active

041660250

ABSTRACT:
A process for purifying aromatic hydrocarbons contained in liquid products of refining petroleum fractions or liquid products of coal coking or low-temperature carbonization from non-aromatic hydrocarbons which comprises heat-treatment of said liquid products at a temperature ranging from 750.degree. to 950.degree. C. under a pressure within the range of from 1 to 10 atm in the presence of acyclic C.sub.2 -C.sub.4 hydrocarbons employed separately or in various combinations at a weight ratio between said acyclic hydrocarbons and said liquid products being of at least 0.3. The heat-treatment results in a vapor-gas mixture which is cooled to isolate a condensate containing predominantly aromatic hydrocarbons. The process is technologically simple and makes it possible to purify aromatic hydrocarbons practically without decomposition thereof.

REFERENCES:
patent: 2852440 (1958-09-01), Smith et al.
patent: 3310592 (1967-03-01), Fukuda et al.
patent: 3542667 (1970-11-01), McMahon et al.
patent: 3617497 (1971-11-01), Bryson et al.
patent: 3754045 (1973-08-01), Ehrlich et al.
patent: 3830853 (1974-08-01), Khcheian et al.
patent: 3855339 (1974-12-01), Hosoi et al.

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