High-accuracy liquid-phase dechlorinating agent and preparation method thereof

Abstract

The invention provides a high-accuracy liquid-phase dechlorinating agent. The dechlorinating agent is prepared from the following components in percentage by weight: 5-20 percent of CuO, 5-10 percent of CaO, 4-8 percent of KOH and the balance of modified activated carbon, wherein the modified activated carbon is activated carbon which is subjected to acidification and oxidation. According to the dechlorinating agent, the modified activated carbon is adopted as a carrier, the open-framework structure of the activated carbon can be optimized, the pore volume and specific surface area can be increased, the content of the oxygen-containing functional group on the surface of the activated carbon can be increased, the carrier polarity can be improved, the combination degree between the carrier and the active ingredient can be enhanced, loss of the active ingredient can be reduced, hydrogen chloride which is a polar molecule can be easily and stably adsorbed on the surface of the modified activated carbon having relatively large polarity, and the dechlorinating accuracy can be improved. Furthermore, the reaction activity of the dechlorinating agent and hydrogen chloride can be increased due to the synergistic effect of three active substances in the dechlorinating agent, and maximization of chlorine capacity of the dechlorinating agent can be effectively realized, so that the chlorine capacity of the liquid dechlorinating agent can be more than or equal to 16 percent, and the dechlorinating accuracy is lower than 0.5ppm.

Description

technical field

[0001] The invention relates to the technical field of petrochemical industry, in particular to a high-precision liquid-phase dechlorination agent for removing hydrogen chloride in oil products and a preparation method thereof. Background technique

[0002] In a modern refinery, continuous reforming has become the main technology for producing high-octane gasoline and aromatics, and it is also the main source of hydrogen for the hydrogenation unit of the refinery. Therefore, whether the catalytic reforming unit operates smoothly directly affects the production efficiency of the entire refinery. economic benefits.

[0003] During the catalytic reforming reaction, the chlorine on the reforming catalyst will be continuously lost. In order to maintain the acidic function of the catalyst, it is necessary to continuously replenish organic chlorides to control the water-chlorine balance of the catalyst. Part of the chlorine will be dissolved in the reforming product...