A hydrogenation mixture preparation process

Abstract

The invention relates to a hydrogenation mixture preparation process. Oil and coal raw materials before a hydrogenation reaction are subjected to the following steps: (1) heavy oil is distilled and / orextracted to achieve the following indexes: saturate is 15%-40%, the aromatic content is greater than or equal to 25%, colloid is 20-23%, asphaltene is less than or equal to 15%, the sum of aromatichydrocarbon and the colloid is greater than the sum of the saturate and the asphaltene, the content of naphthene in the saturate is 60~80%, and the amount of mononaphthene matter in the naphthene is not less than 80%; the distillation process is required to be 280 DEG C or above; (2) pulverized coal is selected and processed to achieve the following indexes: the hydrogen-to-carbon ratio of coal isgreater than or equal to 0.7, and volatile matter is greater than or equal to 32 wt%; inertinite of the coal is less than or equal to 15 wt%, air-dried moisture is less than or equal to 20 wt%, air-dried ash content is less than or equal to 20 wt%, and a pulverized coal particle size is greater than or equal to 40[mu]m and less than or equal to 400 [mu]m; and (3) the treated heavy oil is mixed with pulverized coal and circulating oil obtained from the hydrogenation reaction, and the circulating oil is distillate oil of 370-500 DEG C with the viscosity being less than 100cSt(80 DEG C). Based on the idea of hydrogen dissolution in the early stage of a lifting reaction, conversion rate data of the pulverized coal can be significantly improved by using the raw material mixture defined by thehydrogenation mixture preparation process.

Description

technical field [0001] The invention relates to a hydrogenation mixture preparation process, which belongs to the field of oil refining. Background technique [0002] my country's energy structure is characterized by a lack of oil and gas and relatively rich coal. In conventional fossil energy, coal resource reserves account for more than 90%. In 2018, my country's dependence on foreign oil exceeded 70%, while domestic oil production has been decreasing year by year, the quality has become heavy and inferior, and processing is difficult, all of which have caused serious hidden dangers to national energy security. To this end, it is necessary to give full play to the advantages of my country's rich coal resources and complete varieties, especially oil-rich coal with high volatile content, and turn oil-rich coal into high-quality refining raw materials to replace imported oil. [0003] Petroleum and coal are both fossil resources, both are hydrocarbons, with similar molecular...

AI Technical Summary

Problems solved by technology

However, even if the content of naphthenes or even polycyclic naphthenes is increased, the conversion rate has not been improved as imagined, and the effect is still far from practical application.

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