Quenching hydrocarbon effluent from catalytic reactor to avoid p

Details Quenching hydrocarbon effluent from catalytic reactor to avoid p Quenching hydrocarbon effluent from catalytic reactor to avoid p

1982-12-27

1985-01-22

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With prevention or removal of deleterious carbon...

208 59, 208102, C10G 916, C10G 6510

Patent

active

044950608

ABSTRACT:
A process for high hydroconversion of petroleum residua containing at least about 25 V % material boiling above 1000.degree. F. to produce lower boiling hydrocarbon liquid products and avoid undesirable precipitation of asphaltene compounds. In the process, the feedstock is at least about 50 percent catalytically hydroconverted to material boiling below 975.degree. F. and containing a mixture of gas and liquid fractions, after which the gas fraction is removed and the resulting liquid fractions is pressure-reduced and quenched to a temperature below about 775.degree. F. To avoid precipitation of asphaltene compounds which causes operational difficulties in the downstream equipment, the quench liquid used should have an API gravity not more than about 22.degree. API higher than the API gravity of the first pressure-reduced liquid fraction. The resulting liquid fraction is distilled to produce hydrocarbon liquid products, and a residual bottoms fraction is usually recycled to the catalytic reaction step to obtain increased percent conversion to lower boiling liquid products.

REFERENCES:
patent: 2989459 (1961-06-01), Eastman et al.
patent: 3471398 (1969-10-01), Borst, Jr.
patent: 3544447 (1970-12-01), Van Driesen
patent: 3645887 (1972-02-01), Mounce
patent: 3841981 (1974-10-01), Layng

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