Inorganic dechlorinating agent, preparation method and application thereof

Abstract

The invention discloses an inorganic dechlorinating agent, a preparation method and an application thereof, the inorganic dechlorinating agent comprises a basic carrier, the basic carrier is coated with a rare earth oxide layer to form a composite carrier, the composite carrier is coated with an active component layer, the basic carrier is Al2O3, and the active component is alkali metal oxide; based on the total amount of the inorganic dechlorinating agent, the molar fraction of each component is as follows: 1-50% of alkali metal oxide, 0.5-5% of rare earth oxide and the balance of Al2O3; the rare earth oxide interacts with the surface of Al2O3, an alkali stable structure is formed on the surface of Al2O3, alkali metal is inhibited from acting with Al2O3 to generate sodium aluminate, the pore structure of alumina is better reserved, meanwhile, the rare earth oxide interacts with sodium oxide, sodium oxide is stabilized, loss of active components is prevented, more sodium oxide exists in the form of sodium hydroxide and better reacts with HCl, and therefore, the chlorine capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to an inorganic dechlorination agent, a preparation method and an application. Background technique [0002] The inorganic dechlorination agents currently on the market are mainly active components such as alkali metals and alkaline earth metal compounds loaded on the carrier in a certain form, and the carrier includes active Al 2 o 3 , activated carbon, inorganic clay or diatomaceous earth, etc. Among them, the preparation process of carbonaceous carrier is complicated, the cost is high, there is a risk of flammability and explosion during high-temperature roasting, and the active component is easy to lose, such as the patent application number or patent number is CN201410776492.3, CN201511020457.X, CN201711151914.8; The dechlorination agent prepared with inorganic clay or diatomaceous earth as the carrier has the disadvantage of small specific surface ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the chlorine capacity, dechlorination precision and chlorine capacity at high temperature of the existing inorganic dechlorination agent need to be further improved; the present invention provides an inorganic dechlorination agent