Production process and system for synthesizing ether / coal-based gasoline through thermal blending of high polymer material DMM-2

Abstract

The invention relates to the field of clean utilization of coal and clean energy, in particular to a production process and system for synthesizing ether / coal-based gasoline through thermal blending of a high polymer material DMM-2, after polyoxymethylene dimethyl ether DMM-2 is heated or cooled to 50 DEG C or above, auxiliaries are added, heat preservation is performed for thermal blending, cyclic stirring and materialization, and the clean and environment-friendly ether / coal-based gasoline is prepared. According to the invention, when the high polymer material polyoxymethylene dimethyl ether DMM-2 can be deeply processed by directly utilizing methanol, the raw material temperature of the polyoxymethylene dimethyl ether DMM-2 is reduced, the cooling cost of the polyoxymethylene dimethyl ether DMM-2 is reduced, the water resource is saved, the production cost is reduced, and the economic benefit is improved. The production process and system for synthesizing the ether / coal-based gasoline by thermally blending the high polymer material DMM-2 are innovatively adopted to produce a clean energy materialized new molecular structure, so that the clean energy quality molecular structure is optimized, and the ether / coal-based gasoline is more sufficient in combustion, cleaner in materialization and longer in quality guarantee period.

Description

Technical Field

[0001] The present invention relates to the field of clean utilization of coal for clean energy, and specifically to a production process and system for synthesizing ether / coal-based gasoline by thermal blending of a polymer material DMM-2. Background Art

[0002] China is the largest coal producer and consumer in the world. According to incomplete statistics, approximately 75% of electricity, 60% of chemical raw materials, 72% of industrial fuels, and 92% of civil fuels in China are provided by coal.

[0003] In China, substandard coal resources such as lignite, long-flame coal, and steam coal account for 50% of the total coal resource reserves. Moreover, affected by the rise and fall of international oil prices, the instability of the domestic petroleum product market and the wave-like price changes not only consume a large amount of foreign exchange of the country, but also pose a serious threat to the national energy security. Therefore, it is urgent to scientifically and reasonably develop and utilize coal resources and develop the clean energy industry of coal chemical engineering.

[0004] As a major downstream product of coal chemical engineering, as of 2024, the total methanol production capacity in China has exceeded 200 million tons, but the actual demand is only about 150 million tons, and the capacity utilization rate is less than 75%. Although the growth rate of new production capacity slowed down in 2025 (it is estimated that 8.9 million tons will be newly added), most of the plants are equipped with downstream industrial chains, and the actual external sales volume is limited, and the overall supply pressure is still relatively large. The actual market application only accounts for 35-40% of the utilization rate. Developing and producing high-value-added clean energy through scientific and technological innovation is of great strategic significance for improving China's energy structure and transformation and leapfrogging development and ensuring the sustainable development of the national economy. Summary of the Invention

[0005] In order to scientifically and reasonably develop and utilize the coal chemical product methanol, the present invention provides a production process and system for synthesizing ether / coal-based gasoline by thermal blending of a polymer material DMM-2. The inventors actively explore and research new ways, new technologies, and new models for the transformation and development of the coal cleaning industry, and strive to create a green and environmentally friendly renewable clean energy and a new high-value-added industrial chain for sustainable development. In the process, aiming at the problems of unreasonable carbon, hydrogen, and oxygen molecular structures in traditional coal energy fuels and backward chemical production processes, the transformation is carried out. Methanol is deeply processed into a polymer material polyoxymethylene dimethyl ether (DMM-2), and a thermal blending production process and system are innovatively invented. Using the polymer material DMM-2 as the main new process to synthesize ether / coal-based gasoline fuel, a new molecular structure of clean fuel is produced, so that the molecular structure of the clean fuel quality is optimized, the gene compatibility is scientific and reasonable, the combustion is more sufficient, the physical and chemical properties are cleaner, and the product shelf life is extended. The present invention breaks through the key bottleneck technologies in the industrialization process of clean and efficient utilization of coal, and promotes the coordinated increase in efficiency of environmental protection and pollution control.

[0006] Through scientific and technological information inquiries, up to now, no reports on similar processes have been found for the production process and system of synthetic ether / coal-based gasoline by thermal blending of the polymer material DMM-2. The new process of thermal blending for clean utilization of coal and the industrial chain technology of the new system have achieved good economic and social benefits during the R & D process of innovative experiments (small-scale and pilot-scale) and mass production (this process has been successfully mass-produced in some refined oil plants in a certain place for up to ten years). An industrial chain technology system for a new process of thermal blending for clean utilization of coal has been innovatively developed.

[0007] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a production process for synthetic ether / coal-based gasoline by thermal blending of the polymer material DMM-2. After the polyoxymethylene dimethyl ether DMM-2 is heated to or cooled to above 50 °C, an additive is added, and heat blending, cyclic stirring, and physical and chemical reactions are carried out while maintaining the temperature to obtain clean and environmentally friendly ether / coal-based gasoline.

[0008] As a further improvement of the production process technical solution of the present invention, the additives include energy-saving and efficiency-enhancing combustion aids, ethyl tert-butyl ether, mesitylene, naphtha, MTBE, xylene, etc.

[0009] As a further improvement of the production process technical solution of the present invention, the cyclic stirring and physical and chemical reactions for heat blending are carried out for at least 2 hours.

[0010] As a further improvement of the production process technical solution of the present invention, the temperature for the cyclic stirring and physical and chemical reactions for heat blending is at least 80 °C.

[0011] As a further improvement of the production process technical solution of the present invention, the temperature for the cyclic stirring and physical and chemical reactions for heat blending is at least 100 °C.

[0012] As a further improvement of the production process technical solution of the present invention, the temperature for the cyclic stirring and physical and chemical reactions for heat blending is at least 130 °C.

[0013] As a further improvement of the production process technical solution of the present invention, the temperature for the cyclic stirring and physical and chemical reactions for heat blending is at least 150 °C.

[0014] As a further improvement of the production process technical solution of the present invention, the temperature for the cyclic stirring and physical and chemical reactions for heat blending is at least 180 °C.

[0015] In a second aspect, the present invention provides a production system for synthetic ether / coal-based gasoline by thermal blending of the polymer material DMM-2, including at least one DMM-2 raw material tank, at least one blending tank, at least one additive tank, and at least one finished product tank for ether / coal-based gasoline. Each DMM-2 raw material tank and additive tank are connected to at least one blending tank through pipelines, and all blending tanks are connected to each other through pipelines.

[0016] The production process and system of polymer material DMM-2 thermal blending synthetic ether / coal-based gasoline provided by the present invention have the following advantages compared with the prior art: 1. When the present invention directly utilizes the raw material temperature of polymethoxydimethylether (DMM-2) during the deep processing of methanol to produce the polymer material polymethoxydimethylether (DMM-2), the cost of cooling down polymethoxydimethylether (DMM-2) is reduced, which not only saves water resources but also reduces production costs and improves economic benefits.

[0017] 2. Aiming at the problems of unreasonable carbon, hydrogen, and oxygen molecular structures in traditional coal energy fuels and backward chemical production processes, the present invention conducts reforms. It innovatively adopts the production process and system of polymer material DMM-2 thermal blending synthetic ether / coal-based gasoline to produce a new molecular structure of clean energy physical and chemical substances, optimize the molecular structure of clean energy quality, and make the new production process of new quality scientific and systematic, so that the ether / coal-based gasoline burns more fully, the physical and chemical properties are cleaner, and the product shelf life is longer.

[0018] 3. In the field of clean utilization of coal, the thermal blending production process of coal-to-methanol, methanol-to-polymethoxydimethylether (DMM-2), and synthetic clean and environmentally friendly ether / coal-based gasoline realizes industrial chain integration, and innovates a new production process line for high-value-added new quality industries in the industrial development of clean utilization of coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present invention, and are used together with the specification to explain the principles of the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0021] Figure 1 It represents one of the test reports of the ether / coal-based gasoline described in the present invention.

[0022] Figure 2 It represents another test report of the ether / coal-based gasoline described in the present invention.

[0023] Figure 3 It represents Figure 2 Other pages of the shown test report.

[0024] Figure 4 It is a schematic structural diagram of the production system of the ether / coal-based gasoline described in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] For the production process of synthetic ether / coal-based gasoline by thermal blending of polymer material DMM-2, after the polyoxymethylene dimethyl ether DMM-2 is heated to or cooled to above 50°C, additives are added, and heat preservation is carried out for thermal blending, circulating stirring, and physical and chemical reactions to obtain clean and environmentally friendly ether / coal-based gasoline.

[0028] In an example provided by the present invention, the additives include an energy-saving and efficiency-enhancing combustion improver (patent number: ZL201510466058.X), ethyl tert-butyl ether, mesitylene, naphtha, MTBE, and xylene.

[0029] In another example provided by the present invention, the thermal blending, circulating stirring, and physical and chemical reactions are carried out for at least 2 hours.

[0030] In an example provided by the present invention, the temperature of the thermal blending, circulating stirring, and physical and chemical reactions is at least 80°C.

[0031] Further, the temperature of the thermal blending, circulating stirring, and physical and chemical reactions is at least 100°C.

[0032] Further, the temperature of the thermal blending, circulating stirring, and physical and chemical reactions is at least 130°C.

[0033] Further, the temperature of the thermal blending, circulating stirring, and physical and chemical reactions is at least 150°C.

[0034] Further, the temperature of the thermal blending, circulating stirring, and physical and chemical reactions is at least 180°C.

[0035] As Figure 4 shown, the present invention provides a specific embodiment of a production system for synthetic ether / coal-based gasoline by thermal blending of polymer material DMM-2, including a DMM-2 raw material tank, two blending tanks, six additive tanks, and three ether / coal-based gasoline finished product tanks. Each DMM-2 raw material tank and additive tank is connected to the two blending tanks through pipelines, all the blending tanks are connected to each other through pipelines, and each blending tank is connected to the three ether / coal-based gasoline finished product tanks through pipelines.

[0036] The following details the specific embodiments of the present invention.

[0037] Examples 1 - 7 (92 # Ether - based gasoline) Using polymethoxydimethyl ether (DMM - 2) as the main material, when the temperature of polymethoxydimethyl ether (DMM - 2) is 200°C, 180°C, 150°C, 130°C, 100°C, 80°C, and 50°C respectively, add an energy - saving, efficiency - enhancing combustion promoter (Patent No.: ZL201510466058.X). Then, add the following materials in sequence: ethyl tert - butyl ether, mesitylene, naphtha, MTBE, xylene and other raw materials. After two hours of heat - blending, circulating, stirring, and physical - chemical treatment, ether / coal - based gasoline is prepared.

[0038] Among them, the masses of polymethoxydimethyl ether, energy - saving, efficiency - enhancing combustion promoter, ethyl tert - butyl ether, mesitylene, naphtha, MTBE, and xylene are: polymethoxydimethyl ether (DMM - 2) 35%, energy - saving, efficiency - enhancing combustion promoter 5%, ethyl tert - butyl ether 11%, mesitylene 5%, naphtha 29%, MTBE 8%, and xylene 7%.

[0039] As Figure 1 shown, in the DMMn production area, polymethoxydimethyl ether (DMM - 2) obtained by deep processing of methanol is transported to the DMM - 2 raw material tank. The high - temperature polymethoxydimethyl ether (DMM - 2) is respectively transported into the No. 1 blending tank and the No. 2 blending tank. The energy - saving, efficiency - enhancing combustion promoter, ethyl tert - butyl ether, mesitylene, naphtha, MTBE, and xylene are respectively added into the No. 1 blending tank and the No. 2 blending tank through the corresponding additive tanks. Under the heat - preservation state, stirring, physical - chemical circulation is carried out between the No. 1 blending tank and the No. 2 blending tank to prepare the corresponding ether / coal - based gasoline, which is then transported to the ether / coal - based gasoline finished - product tank. Example 8 (95# ether - based gasoline)

[0040] Using polymethoxydimethyl ether (DMM - 2) as the main material, when the temperature of polymethoxydimethyl ether (DMM - 2) is 200°C, add an energy - saving, efficiency - enhancing combustion promoter (Patent No.: ZL201510466058.X). Then, add the following materials in sequence: ethyl tert - butyl ether, mesitylene, naphtha, MTBE, xylene and other raw materials. After two hours of heat - blending, circulating, stirring, and physical - chemical treatment, ether / coal - based gasoline is prepared.

[0041] Among them, the masses of polymethoxydimethyl ether, energy - saving, efficiency - enhancing combustion promoter, ethyl tert - butyl ether, mesitylene, naphtha, MTBE, and xylene are: (DMM - 2) 33%, energy - saving, efficiency - enhancing combustion promoter 10%, ethyl tert - butyl ether 9%, mesitylene 8%, naphtha 23%, MTBE 8%, and xylene 9%. Other preparation conditions are the same as those in Example 1.

[0042] Test Example 1 The comparison of the shelf lives of the ether / coal - based gasoline obtained in each example is shown in the following table.

[0043] Example 1 2 3 4 5 6 7 8 Shelf life More than 5 years More than 5 years About 4.5 years About 4 years About 3 years About 2 years About 1.5 years More than 5 years Test Example 2 The above-mentioned 92 # The national standard for ether-based gasoline stipulates that the octane number is above 92, the sulfur content is within 10, and the average vapor pressure is between 60; while for 95 # The national standard for gasoline stipulates that the octane number is above 95, the sulfur content is within 10, and the average vapor pressure is between 65. Therefore, 92 # and 95 # gasolines are named according to the octane number labels contained in the gasoline.

[0044] The ether / coal-based gasoline obtained in Example 1 was tested. For the test report, see Figure 1 , Figure 2 , Figure 3 . Figure 1 The test report for the 92 # ether-based gasoline prepared in Example 1, in which the octane number of the 92 # ether-based gasoline is above 92, the sulfur content is 2.8, and the average vapor pressure is between 60.

[0045] Figure 2 and 3 The test report for the 95 # ether-based gasoline prepared in Example 8, in which the octane number of the 95 # ether-based gasoline is above 95, the sulfur content is within 4, and the average vapor pressure is between 65. Among them, Figure 2 and Figure 3 The production time of the ether / coal-based gasoline in is May 21, 2019, and the analysis time is October 25, 2024. After inspection and determination, the product is qualified, and the product quality shelf life has reached 5 years and 5 months. Figure 3 For the 95 # gasoline of Sinopec in , the sampling time is April 11, 2023, and the analysis time is October 25, 2024. This sample shows a stratified and precipitated state, so the test is meaningless.

[0046] Due to the different labels, the addition amounts of some raw materials of the oil products are also different, especially the addition amounts of the energy-saving, efficiency-increasing and combustion-supporting agent and the high-octane gasoline raw material for 95 # are 5% to 10% more than those for 92 # . Therefore, there are differences in the actual inspection indicators of the two ether-based gasoline products. Both of these test results are within the scope permitted by the national standard and are qualified products.

[0047] Test Example 3 The ether / coal-based gasoline prepared in Example 8 of the present invention is compared with the products of the same label in European and American countries and the national standard: Through the comparison of the quality of four major oil products: The octane number of the ether / coal-based gasoline produced by the hot blending process of the present invention is higher than the indicators of Euro VI, the United States, and China VI when compared with the same grade; the sulfur content of the ether / coal-based gasoline produced by the hot blending process of the present invention is lower than the indicators of Euro VI, the United States, and China VI; the quality shelf life of Euro VI, US, and China VI products is one year, while the quality shelf life of the ether / coal-based gasoline produced by the hot blending process of the present invention is as long as five years.

[0048] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. The production process of polymer material DMM-2 thermally adjusted to form ether / coal-based gasoline, characterized in that: After the polyoxymethylene dimethyl ether DMM-2 is heated or cooled to above 50°C, an auxiliary agent is added, and the mixture is kept warm for hot blending, circulating, stirring and physicalization to obtain clean and environmentally friendly ether / coal-based gasoline.

2. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The additives include energy-saving and efficiency-enhancing combustion improvers, ethyl tert-butyl ether, trimethylbenzene, naphtha, MTBE, and xylene.

3. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The heat formulation cycle was stirred for at least 2 hours.

4. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The temperature of the heat preparation circulation stirring materialization is at least 80°C.

5. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The temperature of the heat preparation circulation stirring materialization is at least 100°C.

6. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The temperature of the heat preparation circulation stirring materialization is at least 130°C.

7. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The temperature of the heat preparation circulation stirring materialization is at least 150°C.

8. The process for producing ether / coal-based gasoline by thermally adjusting the polymer material DMM-2 according to claim 1, characterized in that: The temperature of the heat preparation circulation stirring materialization is at least 180°C.

9. A polymer material DMM-2 thermal adjustment and compounding ether / coal-based gasoline production system, characterized in that: It includes at least one DMM-2 raw material tank, at least one blending tank, at least one auxiliary agent tank, and at least one ether / coal-based gasoline finished product tank. Each DMM-2 raw material tank and auxiliary agent tank is connected to at least one blending tank through a pipeline, and all the blending tanks are connected to each other through pipelines.

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