An adsorbent for removing hexafluoropropylene in octafluorocyclobutane and its preparation method

Abstract

The invention discloses an adsorbent for removing hexafluoropropylene in octafluorocyclobutane. The adsorbent comprises, by weight, 10-25% of iron oxide, 5-20% of copper oxide, 60-80% of tin oxide, 0.05-0.5% of gallium, 0.05-0.3% of platinum, 0.1-1.5% of cadmium and 0.1-3% of molybdenum. The invention further discloses a method for preparing the adsorbent. The method includes steps of (1), addingsalt solution of the iron oxide, the copper oxide and the tin oxide into a hydrothermal reactor and uniformly stirring the salt solution of the iron oxide, the copper oxide and the tin oxide; (2), adding salt solution of the gallium, the platinum, the cadmium and the molybdenum into the hydrothermal reactor and carrying out doping modification; (3), adding metal mesh packing into the hydrothermalreactor, placing the hydrothermal reactor with the added metal mesh packing into a drying oven and carrying out reaction on solution in the hydrothermal reactor at the hydrothermal treatment temperatures of 110-160 DEG C for 40-70 min. The adsorbent and the method have the advantage that the hexafluoropropylene in the octafluorocyclobutane can be effectively removed by the adsorbent.

Description

technical field [0001] The invention relates to the field of octafluorocyclobutane purification, in particular to an adsorbent for removing hexafluoropropylene in octafluorocyclobutane. Background technique [0002] Octafluorocyclobutane, also known as perfluorocyclobutane, has stable chemical properties, is non-toxic and has no impact on ozone, and has a low greenhouse effect. It is a green and environmentally friendly special gas, mainly used in high-voltage insulation and VLSI etchant , Mixed refrigerants instead of chlorofluorocarbons, aerosols, cleaning agents (for the electronics industry), sprays, heat pump working fluids, etc. With the implementation of the Montreal Protocol and the rapid growth of the electronics industry, the role of octafluorocyclobutane is becoming more and more important, and its usage is also increasing year by year. It is an important special fluorine-containing gas, which is used in high-voltage insulation, etching, refrigerants and other fie...

AI Technical Summary

Problems solved by technology

However, there are not many manufacturers producing high-purity octafluorocyclobutane in China at present, and the progress in synthesis and purification technology is relatively slow.

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