A kind of solvent oil short-flow cycle method used in coal hydrogenation direct oil production reaction process

Abstract

A short-process circulating method of solvent oil for a direct coal hydrogenation oil preparation process is characterized in that hydrocarbon oil of hot polymer gas R10P-HS-V of a product R10P of thedirect coal hydrogenation oil preparation process R10 is converted into a R30P containing product through an online solvent oil hydrogenation modification reaction process R30, and the R30P containing product can be separated into products R30P containing gas phase R30P-V and oil phase R30P-L; at least part of liquid containing the oil phase R30P-L enters R10 to be used as a short-process circulating oxygen supplying agent SR-LBDS, and thus the 'rich activated hydrogen' reaction condition is obtained with low cost; warm high polymer oil R10P-MS-L of R10P-HS-V is pressurized and then is fed into the product obtained by front-loading R30 and finally enters R10 in a self-pressurizing manner, and the process is simple; the R10 can be high-concentration coal oil slurry; hydrogen supplying solvents can be injected by batch and class in the pre-hydrogenation stage and the inter-stage gas-liquid separation process; and the product is hydrogen extracting type high polymer. Therefore, the method is particularly suitable for large-sized coal liquefying devices.

Description

Technical field [0001] The invention relates to a solvent oil short-flow circulation method used in the direct oil-to-oil reaction process of coal hydrogenation. In the direct oil-to-oil reaction process of coal hydrogenation, the hydrocarbon oil in the R10 product R10P of the thermal high gas R10P-HS-V passes through the online solvent oil During the hydrogenation modification reaction process, R30 is converted into product R30P which contains R30P separated into gas phase R30P-V and oil phase R30P-L. At least a part of the stream containing oil phase R30P-L enters R10 and is used as a short-flow cycle hydrogen donor SR- LBDS, low-cost production of "rich active hydrogen" reaction conditions; R10P-HS-V high-temperature oil R10P-HS-V-MS-L is pressurized and then enters the pre-R30. The resulting product enters R10 under self-pressure. The process is more concise; R10 can be used for high-concentration oil-coal slurry, pre-hydrogenation section, inter-stage gas-liquid separation ...

AI Technical Summary

Problems solved by technology

[0021] ②In the high-pressure stirred tank reaction, the gas phase reaction product can quickly leave the liquid phase and enter the upper gas phase, and almost no longer contact with the liquid phase. However, industrial equipment cannot do this anyway, and cannot set up enough intermediate Gas-liquid separator, to separate the gas phase products in time; it can only be used for approximate operation;

[0051] ④ The stable reaction process of hydrogenation solvent hydrogenation RX0 is usually a process with a low cracking conversion rate. Conventional gaseous hydrocarbons such as CH 4 , C 2 、C 3 、C 4 less output

[0054] Method of the present invention has no report

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