Monomer alkane refrigerant preparation device and method

Abstract

The invention provides a monomer alkane refrigerant preparation device. The technical scheme thereof is that the device mainly comprises an n-butane removal tower (1), a cyclopentane removal tower (2), an n-pentane removal tower (3), a propane removal tower (4), an iso-butane removal tower (5), an ortho-iso-pentane knockout tower (6), a propane-butane removal tower (7), a hydrogenation reactor (8), a material buffer tank (9), a No. 120 tower (10), an isohexane tower (11), a first extraction rectification column (12), a first solvent recovery tower (13), a second extraction rectification column (14), a second solvent recovery tower (15) and a No. 6 tower (16). The monomer alkane refrigerant preparation device has the beneficial effects that the whole device is low in energy consumption, less in three-waste discharge and flexible in product adaptation, so that equipment investment and operation risk are greatly reduced, and the convert ratio can reach 99.99 percent, and obtained propane, iso-butane and pentane products are high in purity and are ideal environment-friendly hydrocarbon refrigerants at present.

Description

Technical field: [0001] The invention relates to the technical field of solvent oil refining and purification, in particular to a device and method for preparing a monomer alkane refrigerant. Background technique: [0002] When producing high-purity alkanes from light hydrocarbons, it is difficult to separate them by general rectification because the boiling points of the components of light hydrocarbons are very close. To remove olefins to less than 100g / g, conventional purification methods (distillation, extraction) cannot completely remove olefins, and only hydrogenation is required. However, if all the raw materials are hydrogenated, the hydrogen consumption will be large, the heat of the hydrogenation reaction will be large, the reaction will be difficult to control, the added value of olefins will be reduced, and the processing cost will be increased. The separation of butene and isobutane is quite difficult. Because palladium-based catalysts are expensive, and the r...

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Problems solved by technology

[0002] When producing high-purity alkanes from light hydrocarbons, it is difficult to separate them by general rectification because the boiling points of the components of light hydrocarbons are very close.

To remove olefins to less than 100g / g, conventional purification methods (distillation, extraction) cannot completely remove olefins, only hydrogenation

However, if all the raw materials are hydrogenated, the hydrogen consumption will be large, the heat of the hydrogenation reaction will be large, the reaction will be difficult to control, the added value of olefins will be reduced, and the processing cost will be increased.

The separation of butene and isobutane is quite difficult

Due to the high price of palladium-based catalysts, the reaction temperature and pressure are close to 5.0MPa, the reaction temperature is above 100°C, the pressure level of dynamic and static equipment is high, and the reaction energy consumption is high. The traditional process has to give up the hydrogenation process and choose rectification

However, the equipment investment in the rectification process is large, and butene cannot be completely removed, and the product has low purity, which is not suitable for use as a refrigerant.

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