METHOD FOR SELECTIVE HYDRATION AND HYDRODESULPHURISATION OF PYROLYSIS GASOLINE AS SOURCE MATERIAL Russian patent published in 2015 - IPC C10G45/02 C10G45/32 C10G69/06 

FIELD: chemistry.

SUBSTANCE: invention refers to versions of a method for selective hydration. One version involves the selective hydrogenation of diolefins and sulphur compounds being the ingredients of pyrolysis gasoline as a source material characterised by some concentration of diolefins and some concentration of the organic sulphur compounds. The above method involves: supplying a hydrocarbon flow which contains the said pyrolysis gasoline as the source material into a reactor, which is equipped with the only section of hydrofining reaction stage loaded with a high-active hydrofining catalyst, and operates in the selective hydration environment, wherein the above hydrocarbon flow comes in contact with the above high-active hydrofining catalyst, wherein the above selective hydration environment has a reactor input temperature falling within the range of 100°C to 260°C, a working pressure of the reactor from 10 bar abs to 100 bar abs and a weight hourly space velocity within the range of 0.2 to 40 h^-1; deflecting the outgoing flow low in diolefins and sulphur compounds from the above reactor; dividing the above flow outgoing from the reactor into a portion of the above flow outgoing from the reactor and a residual portion of the above flow outgoing from the reactor; and supplying the above portion of the above flow outgoing from the reactor into the above reactor as a recirculating flow, wherein the weight ratio of the above recirculating flow to the above hydrocarbon flow exceeds 1:1, wherein the above diolefin concentration exceeds 3 wt %; the above low diolefin concentration makes less than 10 weight portions per million, and wherein the above concentration of the organic sulphur compounds exceeds 50 weight portions per million, and the above low concentration of the organic sulphur compounds makes less than 3 weight portions per million; wherein the above flow outgoing from the reactor is characterised by the content of aromatic substances of at least 90 wt % of the reactor input content of the aromatic substances.

EFFECT: using the presented invention enables minimising the polymerisation of the high-reactivity ingredients and saturation of the aromatic compounds of pyrolysis gasoline as the source material.

13 cl, 2 tbl, 2 dwg