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A complete collection of patents for the production process and application technology of dimethyl ether 01. A catalyst for dimethyl ether dehydration from methanol and its preparation method and application 02. A process for synthesizing dimethyl ether from slurry bed coal-based synthesis gas 03. A catalyst for the synthesis of dimethyl ether from slurry bed coal-based synthesis gas and its preparation method and application 04. Energy-saving and environmentally friendly dimethyl ether industrial cutting gas 05. Usage Low-temperature high-activity catalyst for direct synthesis of dimethyl ether and its preparation method 06. Modified alumina catalyst for the synthesis of dimethyl ether 07. Dimethyl ether compounded petroleum liquefied gas and its application 08. Dimethyl ether compound fuel and its application in ignition engines 09. Dimethyl ether compound gas and its application in gas welding and gas cutting 10. A Method of producing dimethyl ether by dehydration of methanol by mixed-phase method 11. Catalyst for direct synthesis of dimethyl ether and its preparation method 12. Method of liquid-phase synthesis of dimethyl ether with super strong acid 13. Catalyst for one-step preparation of dimethyl ether from synthesis gas 14. Method of producing dimethyl ether from methanol 15. Method of producing dimethyl ether liquefied gas from methanol 16. Production method of dimethyl ether Methods and equipment 17. Method for directly preparing dimethyl ether from synthesis gas 18. Catalyst for directly preparing dimethyl ether from synthesis gas 19. New process for preparing acetic acid, methanol and dimethyl ether from methane through non-synthesis gas process 20. Dimethyl ether injection system driven by diesel oil pump 21. Diesel and dimethyl ether mixed injection system 22. Production from crude methanol Method for preparing dimethyl ether 23. An improved dimethyl ether slurry bed synthesis process 24. A new slurry bed pressure swing separation process for dimethyl ether or methanol synthesis 25. A new slurry bed dimethyl ether or methanol synthesis process and equipment 26. Stove tank universal composite dimethyl ether liquefied gas 27. A catalyst for fluidized bed synthesis of dimethyl ether and its preparation method 28. Fuel nozzle for dimethyl ether fuel and a diesel engine including the fuel nozzle 29. High-efficiency, ultra-low emission combustion system of dimethyl ether engine 30. Ultra-multi-nozzle enhanced injection system for dimethyl ether fuel 31. Separation method for one-step synthesis of dimethyl ether from synthesis gas 32. One-step synthesis of dimethyl ether through indirect liquefaction of biomass Method 33. A low-pressure fuel supply system for engines using dimethyl ether or diesel fuel 34. A dimethyl ether mixed fuel 35. A method for preparing dimethyl ether from methanol 36. A method and device for producing dimethyl ether using a circulating air-flow bed using synthesis gas as raw material 37. Dimethyl ether separation process method 38. A method for producing dimethyl ether 39. A method for producing dimethyl ether Method for catalytically synthesizing dimethyl ether in a combined bed 40. Co-production method and device for combining dimethyl ether production and power generation in smelting reduction iron smelting 41. A nano-copper-zinc-aluminum catalyst for synthesizing methanol and dimethyl ether and its preparation method 42. A separation process for refining dimethyl ether while recovering carbon dioxide 43. A method of producing low carbon ene from methanol or dimethyl ether Hydrocarbon process method and its system 44. A one-step cooling, condensation and separation process for producing dimethyl ether from synthetic feed gas 45. A methanol aqueous solution absorption process for directly producing dimethyl ether from synthetic feed gas 46. A slurry bed synthesis gas to dimethyl ether reaction process 47. A catalyst preparation method for directly producing dimethyl ether from synthesis gas 48. An integrated process method for producing dimethyl ether from synthesis gas 49. A method for directly synthesizing dimethyl ether from synthesis gas. 50. Production of dimethyl ether by dehydration and catalysis by composite acid method. 51. Separation method of dimethyl ether products in the production of synthetic dimethyl ether. 52. Method for producing dimethyl ether by catalytic dehydration of methanol. 53. Dual-functional catalysis for producing dimethyl ether directly from synthesis gas. Agent and its preparation process 54. A method of synthesizing dimethyl ether in a three-phase slurry bed 55. Catalyst for producing dimethyl ether and its preparation 56. Low-voltage electronically controlled dimethyl ether fuel injection system 57. Dimethyl ether controllable premixed gas combustion system 58. Dimethyl ether fuel controllable premixed gas formation method 59. A method for forming natural gas through air or rich Method for producing dimethyl ether by partial oxidation of oxygen air 60. Dmethyl ether blending technology 61. Supported heteropoly acid catalyst for dehydrating methanol to produce dimethyl ether and its production method 62. Method for synthesizing methanol/dimethyl ether mixture from synthesis gas 63. A method for dehydrating methanol to produce dimethyl ether 64. One-step conversion of syngas to dimethyl ether by introducing methanol Chemical method 65. Method for changing dimethyl ether water and generating energy 66. A process for producing dimethyl ether from synthesis gas 67. Dimethyl ether fuel and a method for generating power in a dry low NOx fuel system 68. New slurry bed synthesis of dimethyl ether reaction process and equipment 69. Catalyst for direct synthesis of dimethyl ether and its preparation method 70. Phosphoric acid The use of aluminum as a dehydration catalyst in the one-step process of dimethyl ether 71. Catalysts for the manufacture of dimethyl ether and their manufacturing methods and manufacturing methods of dimethyl ether 72. Catalysts and applications for producing dimethyl ether from gases containing carbon monoxide and hydrogen 73. Production and recovery of dimethyl ether from methanol 74. Preparation methods of fuel-grade dimethyl ether 75. From synthesis gas Catalyst for directly producing dimethyl ether 76, method for producing hydrogen and carbon oxides from dimethyl ether 77, method for producing dimethyl ether from methanol 78, composite catalyst for preparing dimethyl ether from synthesis gas in one step and its preparation method 79, method for preparing dimethyl ether by catalytic distillation 80, method for producing dimethyl ether from semi-water gas or water gas 8 1. Preparation method of dimethyl ether catalyst 82. A catalyst for the reaction of producing dimethyl ether from synthesis gas and its preparation process of dimethyl ether 83. Preparation method of dimethyl ether 84. Metal zeolite catalyst for the reaction of converting synthesis gas into dimethyl ether 85. Method of producing pure dimethyl ether 86. Recovery of dimethyl ether from liquid phase C3-C5 olefin raw materials