Two stage liquefaction of coal

Claim 2

A two stage process for converting solid, hydrogen-deficient, ash containing, hydrocarbonaceous material into liquid hydrocarbons which comprises a. solvent extracting a solid, hydrogen deficient, ash containing hydrocarbonaceous material in the presence of hydrogen to produce a liquid extract product, said extraction being performed at a temperature in the range of about 600°-850° F., a coal feed throughput rate of 150-250 lbs/hr/ft 3 and under hydrogen pressure in the range of about 1000 to 2000 psi; b. solvent deashing to produce a clean extract; and c. hydrocracking said clean extract in a catalytic ebullating bed hydrocracker to produce liquid hydrocarbons, said hydrocracking being performed at a temperature in the range of about 750°-825° F. and under hydrogen pressure in the range of about 2000-3000 psi.

Claim 3

The process of claim 1 wherein the solvent extraction converts at least about 90 percent of said solid hydrogen-deficient, ash containing, hydrocarbonaceous material into a liquid extract product.

Claim 4

The process of claim 1 wherein the solid, hydrogen-deficient, ash containing, hydrocarbonaceous material is coal.

Claim 5

The process of claim 1 wherein the solid hydrogen-deficient, hydrocarbonaceous, ash containing, material is coal and the solvent extraction converts at least 90 percent of said coal into a liquid extract product.

Claim 6

A two stage process for converting solid, hydrogen-deficient, ash containing, hydrocarbonaceous, material into a liquid hydrocarbon product which comprises: a. solvent extracting said solid, hydrogen-deficient, ash containing, hydrocarbonaceous material in the presence of hydrogen with a hydrogen donor solvent to convert substantially all of said solid, hydrogen-deficient, hydrocarbonaceous material into a liquid extract product, said extraction being performed at a temperature in the range of about 600°-850° F., a coal feed throughput rate of 150-250 lbs/hr/ft 3 and hydrogen pressure in the range of about 1000-2000 psi; b. fractionating said liquid extract product to separate light liquids and gases from the heavy liquid extract; c. solvent deashing said heavy liquid extract to obtain a clean extract; d. removing said deashing solvent; and e. hydrocracking said clean extract in a catalytic ebullating bed hydrocracker to produce a liquid hydrocarbon product, said hydrocracking taking place at a temperature in the range of about 750°-825° F. and under hydrogen pressure in the range of about 2000-3000 psi.

Claim 7

A two stage process for converting solid, hydrogen-deficient, ash containing, hydrocarbonaceous, material into a liquid hydrocarbon product which comprises: a. solvent extracting said solid, hydrogen-deficient, ash containing, hydrocarbonaceous material in the presence of hydrogen with a hydrogen donor solvent to convert substantially all of said solid, hydrogen-deficient, hydrocarbonaceous material into a liquid extract product, said extraction being performed at a temperature in the range of about 600°-850° F., a coal feed throughput rate of 150-250 lbs/hr/ft 3 and hydrogen pressure in the range of about 1000-2000 psi; b. fractionating said liquid extract product to separate light liquids and gases from the heavy liquid extract; c. solvent deashing said heavy liquid extract to obtain a clean extract; d. removing said deashing solvent; and e. hydrocracking said clean extract in a catalytic ebullating bed hydrocracker to produce a liquid hydrocarbon product, said hydrocracking taking place at a temperature in the range of about 750°-825° F. and under hydrogen pressure in the range of about 2000-3000 psi.

Claim 8

The process of claim 5 wherein the solvent extraction converts at least 90 percent of said solid, hydrogen-deficient, ash containing, hydrocarbonaceous material into a liquid extract product.

Claim 9

The process of claim 5 wherein the liquid hydrocarbon product comprises light hydrocarbons (C 4 -390° F.) and fuel oil (390°-850° F.).

Claim 10

The process of claim 5 wherein the hydrogen donor solvent is a process derived material.

Claim 11

The process of claim 6 wherein the catalyst is NiMo.

Claim 12

The process of claim 5 wherein the solid hydrogen-deficient, ash containing, hydrocarbonaceous material is coal.

Claim 13

The process of claim 10 wherein the solvent extraction converts at least 90 percent of said coal into a liquid extract product.

Claim 14

The process of claim 10 wherein the solvent extraction converts at least 90 percent of said coal into a liquid extract product.