# US 11,110,440 B2 · Composite catalyst for coal depolymerization and using method therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,110,440 B2 - Document ID: US11110440B2 - Status: Granted - Kind: B2 - Application number: 16/052,718 - Filed: 2018-08-02 - Published: 2019-01-10 - Granted: 2021-09-07 - Earliest claimed: 2016-02-03 - Assignees: Taiyuan University of Technology - Applicants: Taiyuan University of Technology - Inventors: Wei Huang; Litong Liang; Qian Zhang; Jianwei Liu; Juntian Huai; Xiaogang Hao; Zhonglin Zhang - Web page: https://patentgrep.com/patent/US11110440B2 ## CPC - B01J 27/128: with iron group metals or platinum group metals - B01J 23/26: Chromium - B01J 23/34: Manganese - B01J 23/881: and iron - B01J 23/8873: {Zinc, cadmium or mercury} - B01J 23/8892: {Manganese} - B01J 27/053: Sulfates - B01J 27/138: with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury - B01J 27/25: Nitrates - C10B 53/04: of powdered coal - C10B 57/045: {containing mineral oils, bitumen, tar or the like or mixtures thereof} - C10B 57/06: containing additives - C10G 1/08: with moving catalysts - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C10B: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295) - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## Abstract A composite catalyst for coal depolymerization, the catalyst includes an agent A and an agent B. The agent A includes an iron salt-based catalyst, and the agent B includes a metal salt-based catalyst different from the iron salt-based catalyst. The agent A and the agent B are alternately added during use. ## Claims ### Claim 1 A composite catalyst for coal depolymerization, comprising an agent A and an agent B; wherein the agent A comprises an iron salt-containing catalyst; and the agent B comprises a metal salt-containing catalyst different from the iron salt-containing catalyst; the metal salt-containing catalyst different from the iron salt-containing catalyst is an aluminum salt-containing catalyst; and the aluminum salt-containing catalyst is aluminum nitrate. ### Claim 2 (depends on 1) The composite catalyst of claim 1, wherein a weight percentage of the iron salt-containing catalyst is 3% to 25% in the agent A. ### Claim 3 (depends on 2) The composite catalyst of claim 2, wherein the iron salt-containing catalyst consists of at least one of ferric chloride and ferric nitrate. ### Claim 4 (depends on 3) The composite catalyst of claim 3, wherein the agent A further consists of at least one of a first inorganic accelerator, a first organic accelerator, a first surfactant and a first solvent. ### Claim 5 (depends on 4) The composite catalyst of claim 4, wherein the agent A comprises the iron salt-containing catalyst, the first inorganic accelerator, the first organic accelerator, the first surfactant, and the first solvent; weight percentages of the first inorganic accelerator, the first organic accelerator and the first surfactant are 0.5 to 2%, 1 to 10%, and 0.05 to 2.0% in the agent A, respectively; and a balance is the first solvent. ### Claim 6 (depends on 5) The composite catalyst of claim 5, wherein the first inorganic accelerator consists of at least one of potassium permanganate, potassium dichromate, potassium peroxydisulfate, and hydrogen peroxide; the first organic accelerator consists of at least one of methanol and ethanol; the first surfactant consists of at least one of fatty alcohol oxyethylene ether, sodium dodecyl benzene sulfonate, alkylphenol polyoxyethylene ether, sodium 1,2-n-butylnaphthalene-6 sulfonate and sodium dioctyl sulfosuccinate; and the first solvent is water. ### Claim 7 (depends on 1) The composite catalyst of claim 1, wherein a weight percentage of the metal salt-containing catalyst is 2% to 15% in the agent B. ### Claim 8 (depends on 7) The composite catalyst of claim 7, wherein the agent B further consists of at least one of a second inorganic accelerator, a second organic accelerator, a second surfactant, and a second solvent. ### Claim 9 (depends on 8) The composite catalyst of claim 8, wherein the agent B comprises the metal salt-containing catalyst, the second inorganic accelerator, the second organic accelerator, the second surfactant, and the second solvent; weight percentages of the second inorganic accelerator, the second organic accelerator, and the second surfactant are 0.5 to 2%, 1 to10%, and 0.05 to 2.0% in the agent B, respectively; and a balance is the second solvent. ### Claim 10 (depends on 9) The composite catalyst of claim 9, wherein the second inorganic accelerator consists of at least one of potassium permanganate, potassium dichromate, potassium peroxydisulfate and hydrogen peroxide; the second organic accelerator consists of at least one of methanol and ethanol; the second surfactant consists of at least one of fatty alcohol oxyethylene ether, sodium dodecyl benzene sulfonate, alkylphenol polyoxyethylene ether, sodium 1,2-n-butylnaphthalene-6 sulfonate and sodium dioctyl sulfosuccinate; and the second solvent is water. ### Claim 11 (depends on 1) The composite catalyst of claim 1, wherein a bituminous coal consists of at least one of lignite, long flame coal, non-stick coal, and weakly caking coal. ### Claim 12 (depends on 1) A method of using the composite catalyst for coal pyrolysis of claim 1, comprising the steps of: (i) adding the agent A to the bituminous coal, and adding the agent B to the bituminous coal after waiting for a first predetermined time period; or (ii) adding the agent B to the bituminous coal, and adding the agent A to the bituminous coal after waiting for the first predetermined time time period; or (iii) repeating the step (i) after waiting for a second predetermined time period on the basis of the step (i) by alternately adding the agent A and the agent B for a plurality of times; or repeating the step (ii) after waiting for the second predetermined time period on the basis of the step (ii) by alternately adding the agent A and the agent B for a plurality of times. ### Claim 13 (depends on 12) The method of claim 12, wherein the first predetermined time period or the second predetermined time period is greater than or equal to 30 minutes. ### Claim 14 (depends on 12) The method of claim 12, wherein the method further comprises the step of: drying the low rank coal with the depolymerization composite catalyst at 110 to 120° C. after waiting for the first predetermined time period or the second predetermined time period. ### Claim 15 (depends on 14) The method of claim 14, wherein the method further comprises the step of: heating the dried low rank coal in a fixed bed reactor from 300° C. to 630 to 650° C. at a rate of 4 to 5° C./min, and keeping a temperature at 630 to 650° C. for 15 to 20 mins to perform depolymerization. ### Claim 16 (depends on 14) The method of claim 14, wherein the agent A or the agent B is added into the low rank coal by spraying. ### Claim 17 (depends on 14) The method of claim 14, wherein adding the agent A or the agent B into the low rank coal is accomplished by immersing the bituminous coal into the agent A or the agent B.