IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0484378
(2000-01-14)
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발명자
/ 주소 |
- Reyes, Sebastian C.
- Feeley, Jennifer S.
- Hershkowitz, Frank
- Deckman, Harry W.
- Androulakis, Ioannis P.
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인용정보 |
피인용 횟수 :
56 인용 특허 :
2 |
초록
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A multistage catalytic partial oxidation (CPO) process for oxidizing a hydrocarbon feedstream comprising C1-C4hydrocarbons, with an oxygen-containing feedstream to produce a product comprising CO and H2, also known as synthesis gas or syngas. The process employs a CPO catalyst, and controlled proces
A multistage catalytic partial oxidation (CPO) process for oxidizing a hydrocarbon feedstream comprising C1-C4hydrocarbons, with an oxygen-containing feedstream to produce a product comprising CO and H2, also known as synthesis gas or syngas. The process employs a CPO catalyst, and controlled process features, including: (A) the total oxygen requirement for the process is introduced incrementally, in more than one reaction stage, using an oxygen-containing feedstream at more than one feed point in the process, each stage including a catalyst; (B) the oxygen-containing feedstream, hydrocarbon feedstream and, in reaction stages after the first of said multiple stages, the intermediate product produced in the prior stage, are mixed for a period of time, after they are brought into contact with one another, of less than about 1 millisecond to form a substantially uniform mixture, wherein the mixture is then contacted with the catalyst; (C) the oxygen-containing feedstream and the hydrocarbon feedstream are preheated prior to entry into the first stage, to a temperature of from about 450° C. to less than about 1,000° C.; and (D) the mixture temperature of the product in each stage following the first stage is from greater than about 600° C. to less than about 1,000° C. Preferably, the process comprises less than or equal to about five stages, the first stage preheat temperature recited in step (C) is greater than about 550° C. and the mixture temperature of the product in each stage following the first stage is at least 700° C.
대표청구항
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A multistage catalytic partial oxidation (CPO) process for oxidizing a hydrocarbon feedstream comprising C1-C4hydrocarbons, with an oxygen-containing feedstream to produce a product comprising CO and H2, also known as synthesis gas or syngas. The process employs a CPO catalyst, and controlled proces
A multistage catalytic partial oxidation (CPO) process for oxidizing a hydrocarbon feedstream comprising C1-C4hydrocarbons, with an oxygen-containing feedstream to produce a product comprising CO and H2, also known as synthesis gas or syngas. The process employs a CPO catalyst, and controlled process features, including: (A) the total oxygen requirement for the process is introduced incrementally, in more than one reaction stage, using an oxygen-containing feedstream at more than one feed point in the process, each stage including a catalyst; (B) the oxygen-containing feedstream, hydrocarbon feedstream and, in reaction stages after the first of said multiple stages, the intermediate product produced in the prior stage, are mixed for a period of time, after they are brought into contact with one another, of less than about 1 millisecond to form a substantially uniform mixture, wherein the mixture is then contacted with the catalyst; (C) the oxygen-containing feedstream and the hydrocarbon feedstream are preheated prior to entry into the first stage, to a temperature of from about 450° C. to less than about 1,000° C.; and (D) the mixture temperature of the product in each stage following the first stage is from greater than about 600° C. to less than about 1,000° C. Preferably, the process comprises less than or equal to about five stages, the first stage preheat temperature recited in step (C) is greater than about 550° C. and the mixture temperature of the product in each stage following the first stage is at least 700° C. applying is by one of pumping and pneumatic flowing.14. The method of claim 1 wherein the applying is by spraying.15. A method of dusting coal mine surfaces comprising: a) providing a dry powder formulation comprising limestone dust, dry powder foaming agent, and an additive that promotes the production of gas upon contact with water;b) mixing the dry powder formulation with water to generate a foamed material; andc) applying the foamed material to a mine surface.16. The method of claim 15 wherein the foaming agent is selected from the group consisting of: alkanolamides, alkanolamines, alkylaryl sulfonates, polyethylene oxide-polypropylene oxide block copolymers, alkylphenol ethoxylates, carboxylates of fatty acids, ethoxylates of fatty acids, sulfonates of fatty acids, sulfates of fatty acids, fluorocarbon containing surfactants, olefin sulfonates, olefin sulfates, hydrolyzed proteins, and mixtures thereof.17. The method of claim 16, wherein the foaming agent is an alpha olefin sulfonate.18. The method of claim 15 wherein the applying is by one of pumping and pneumatic flowing.19. The method of claim 15 wherein the applying is by spraying.20. The method of claim 15 wherein the gas producing additive is selected from the group consisting of: aluminum sulfate and monoammonium phosphate.21. The method of claim 15 wherein the gas producing additive is provided in an amount from about 0.25% to about 1.0% based on dry weight.22. The method of claim 15 wherein the dry powder foaming agent is provided in an amount from about 0.05% to about 0.5% based on dry weight.23. A method of dusting coal mine surfaces comprising: a) providing a dry powder formulation comprising limestone dust, dry powder foaming agent and an additive that promotes the production of gas upon contact with water;b) applying the dry powder formulation onto a wet surface.24. The method of claim 23 wherein the foaming agent is selected from the group consisting of: alkanolamides, alkanolamines, alkylaryl sulfonates, polyethylene oxide-polypropylene oxide block copolymers, alkylphenol ethoxylates, carboxylates of fatty acids, ethoxylates of fatty acids, sulfonates of fatty acids, sulfates of fatty acids, fluorocarbon containing surfactants, olefin sulfonates, olefin sulfates, hydrolyzed proteins, and mixtures thereof.25. The method of claim 24, wherein the foaming agent is an alpha olefin sulfonate.26. The method of claim 23 wherein the applying is by one of pumping and pneumatic flowing.27. The method of claim 23 wherein the applying is by spraying.28. The method of claim 23 wherein the gas producing additive is selected from the group consisting of: aluminum sulfate and monoammonium phosphate.29. The method of claim 23 wherein the gas producing additive is provided in an amount from about 0.25% to about 1.0% based on dry weight.30. The method of claim 23 wherein the dry powder foaming agent is provided in an amount from about 0.05% to about 0.5% based on dry weight.31. A method of dusting coal mine surfaces comprising the steps of: a) providing a foam mixture comprising a foaming agent and water;b) incorporating air into the foam mixture to produce a foam;c) combining the foam and dust of at least one material selected from the group consisting of dolomite, magnesite, Class F fly ash, silica fume, gypsum, anhydrite, non-expansive clays, fine ground mine tailings, and mixtures thereof, to form a foamed material;d) applying the foamed material to a mine surface.32. The method of claim 31, wherein the foaming agent is selected from the group consisting of dry powder foaming agent and liquid foaming agent.33. The method of claim 31, wherein the water content is about 8% to about 40% of foamed material.34. The method of claim 31 wherein the foamed material has a density of about 12 pounds per cubic foot to about
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