Method for preparing ethanol by using methanol
A technology for the preparation of methanol and ethanol, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds. It can solve the problems of relatively harsh reaction conditions, increasing the input of raw materials, and harsh reaction environment requirements. Achieve the effect of low cost, high production efficiency and convenient operation
Inactive Publication Date: 2018-01-12
TANGSHAN ZHONGRONG TECH CO LTD
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Problems solved by technology
That is to say, the preparation method disclosed in this patent needs to be completed in the presence of active metals, and a cocatalyst needs to be added. Not only the steps are cumbersome, but also the actual reaction conditions are relatively harsh. It is feasible to carry out laboratory operations, but for large-scale For ethanol manufacturers, it not only increases the investment of raw materials, but also requires harsh reaction environment, which is difficult to realize
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Embodiment 1
[0033] After the methanol liquid as the raw material is vaporized, it is passed into the reformer, and mixed with medium-pressure steam according to the mass ratio of methanol vapor to water vapor of 1:1, and then enters the methanol reformer after being heated to 240°C. The gas-phase catalytic reaction is carried out in the converter at 240°C to maintain the temperature environment, and the two reactions of catalytic cracking and conversion are completed at the same time. After cooling and separation, the conversion gas mainly containing hydrogen and carbon dioxide is obtained. The reformed gas enters the hydrogen purification tower and is purified to obtain hydrogen with a content of more than 99.8%. The purified hydrogen and ethyl acetate steam are mixed and vaporized. After heat exchange, the temperature is raised to 190°C and enters the reactor. The ethyl acetate addition is carried out at a temperature of 200°C, a pressure of 3.0-3.3MPa, and a copper-zinc catalyst. Hydro...
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The invention relates to a method for preparing ethanol by using methanol. The method comprises the following steps: vaporizing a methanol raw material, then enabling the vaporized methanol raw material to enter a methanol converter together with water vapor for reaction, and obtaining converted gas; purifying the converted gas by means of a purification tower to obtain pure hydrogen; mixing the hydrogen with vapor obtained after ethyl acetate is vaporized, enabling the mixed gas to enter a reactor for reaction, and producing crude ethanol; enabling the crude ethanol to enter a rectifying tower for carrying out run-off operation so as to obtain a qualified ethanol product. The method for preparing the ethanol by using the methanol is mainly used for producing gasoline additive ethanol usedas fuel, and is simple in processes and convenient to operate; the production can be completed by carrying out simple operation by means of the existing equipment, so that the production efficiency is high; the produced ethanol product is high in concentration, completely meets the requirements for the fuel ethanol used as a gasoline additive, and has the advantages of low cost and good effect.
Description
technical field [0001] The invention relates to a method for preparing ethanol, in particular to a method for preparing ethanol from methanol. Background technique [0002] In recent years, the world is facing a serious energy crisis, and finding new alternative energy sources has become the key to the future energy strategies of various countries. Among them, ethanol has the characteristics of renewable, high efficiency, low cost, and safety. As a fuel, ethanol can be used directly as a liquid fuel or mixed with gasoline to reduce dependence on non-renewable energy such as petroleum, thereby ensuring the security of domestic energy . [0003] The traditional ethanol preparation method is to realize the continuous production of ethanol by fermenting and distilling grains, tubers and sugary raw materials. This traditional ethanol preparation method has low efficiency and poor purity. The concentration of ethanol produced by simple distillation is mostly Will not exceed 96% ...
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Login to View More IPC IPC(8): C07C29/149C07C31/08
Inventor 代淑梅杨春辉李金伟
Owner TANGSHAN ZHONGRONG TECH CO LTD