A kind of component dmm composed of high coagulation methoxy dimethyl ether 6+ and methylal dmm dmm 3‑5 Methods
A technology for condensing methoxy dimethyl ether and methoxy dimethyl ether, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc. problems, to achieve the effect of high product selectivity, simple process flow, and low process energy consumption
Active Publication Date: 2017-03-22
TSINGHUA UNIV
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Problems solved by technology
Low condensation methoxy dimethyl ether component DMM and DMM 2 It has a low flash point and is highly volatile. After being added to diesel, it will affect the safety of oil products and easily cause engine air lock
The highly cohesive methoxy dimethyl ether component DMM 6+ High melting point, easy to precipitate solid phase at room temperature, affecting the use of oil in engines
Method used
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Embodiment 1
[0047] like figure 1 As shown, sulfuric acid is loaded into the stirred tank reactor 102 as a catalyst, so that the amount of catalyst in the reactor is 2%. The mass ratio of methylal and high condensation methoxy dimethyl ether component DMM is 2:1 6+ In the beating tank 101, it is processed into a slurry mixture. The mixture is delivered by the slurry pump to the fluid inlet at the top of the stirred tank reactor 102 and enters the stirred tank reactor 102 .
[0048] Pass hot water at 90°C into the interlayer of the reactor to keep the bed at a constant temperature of 90°C and the pressure at 0.3 MPa, for example. However, this is only an example, and liquids at other temperatures can be passed into the interlayer of the reactor to keep the constant temperature of the bed at other temperatures. The reaction time in the stirred tank reactor 102 was 1 hour.
[0049] During the product separation process, a stirred tank neutralizer 103 and a plate filter 104 are used for ne...
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The invention belongs to the technical field of energy chemical industry and in particular relates to a method for preparing PODE3-5 from a recovered long-chain polyoxymethylene dimethyl ether component PODE6+. In the synthesis reaction process of the method provided by the invention, dimethoxymethane and PODE6+ are used as raw materials, a stirred tank reactor or a fluidized bed reactor is adopted and the utilization rate of the raw materials is high. A product separation process comprises three processes of neutralization and filtration, pre-rectification and vacuum rectification. During the neutralization and filtration, a stirred tank neutralizer and a plate filter are adopted. The pre-rectification and the vacuum rectification are coupled to realize target product separation and simultaneously circulate materials to improve distribution of products in the reactor and improve the selectivity of target products. The process flow provided by the invention is simple, the reaction efficiency is high, the energy consumption in the process is low, no waste is substantially produced in the entire production process and the product selectivity is high.
Description
technical field [0001] The invention belongs to the technical field of energy and chemical industry, and particularly relates to a DMM composed of highly cohesive methoxy dimethyl ether component 6+ DMM with methylal DMM 3-5 Methods. Background technique [0002] my country's economic development is facing the dual pressures of increasingly prominent energy shortage and environmental pollution. Energy shortages, especially the heavy dependence on imports of petroleum resources, have posed severe challenges to energy economic development and national energy security. The 2014 BP World Energy Statistical Yearbook pointed out that my country's total primary energy consumption ranks first in the world, but the per capita primary energy consumption is still only 1 / 3 of that of developed countries such as the United States. It is foreseeable that my country's total energy consumption will continue to grow rapidly in a long period of time in the future. In recent years, the mos...
Claims
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IPC IPC(8): C07C43/30C07C41/48C07C41/56
CPCC07C41/48C07C41/56C07C43/30
Inventor 王金福唐强郑妍妍王铁峰
Owner TSINGHUA UNIV