Gasoline desulfurization adsorbent, and preparation method and application thereof

Abstract

The invention discloses a gasoline desulfurization adsorbent, and a preparation method and an application thereof. The desulfurization adsorbent is composed of the following raw materials in parts by weight: 27 to 35 parts of nanometer attapulgite, 3 to 7 parts of strontium acetate, 13 to 21 parts of acrylic acid and 5 to 13 parts of triethanolamine. The desulfurization adsorbent provided by the invention is prepared through the following steps: with the nanometer attapulgite as a raw material, carrying out mixing with strontium acetate, carrying out grinding, carrying out treatment with acrylic acid and triethanolamine, etc. The desulfurization adsorbent has large sulfur capacity, good selectivity to sulfur and high desulfurization depth, can remove sulfur to 1 ppmw, has long service life and is friendly to the environment. The preparation process provided by the invention has the advantages of simplicity, easy operation, easy control, stable performances, low production cost and applicability to industrial production. By adopting the desulfurization absorbent provided by the invention for desulfurization of gasoline, the process has mild operation conditions, and can be performed at normal pressure and low temperature, so energy consumption is saved, and the cost of operation is reduced.

Description

technical field [0001] The invention relates to the technical field of desulfurization materials, in particular to a gasoline desulfurization adsorbent and its preparation method and application. Background technique [0002] About 70% of my country's commercial gasoline comes from the heavy oil catalytic cracking process. Since heavy oil raw materials contain a large amount of sulfur, nitrogen, oxygen heteroatom compounds and colloidal asphaltenes, catalytic cracking gasoline not only has a high sulfur content, but also contains a large amount of olefin components , More than 90% of the sulfur in commercial gasoline comes from catalytic cracking gasoline, which makes the sulfur content of gasoline in my country far exceed that in foreign gasoline. Therefore, how to reduce the sulfur content in FCC gasoline is the key to reducing the sulfur content in commercial gasoline. In particular, on January 1, 2018, the National V gasoline quality standard that is about to be implemen...

AI Technical Summary

Problems solved by technology

However, the desulfurizers in the prior art generally have the following deficiencies: 1. The desulfurization depth is not enough, and it is difficult to desulfurize to below 5 ppmw; 2. The specific surface area of ​​the adsorbent is low, and the adsorption capacity of sulfur is relatively limited; 3. The operating conditions of the desulfurization process are harsh. And the energy consumption is high, the operation cost is high; 4. The desulfurization process is not friendly to the environment; 5. The selectivity of the desulfurizer is low and the service life is short

In addition, most of the existing desulfurizers use activated carbon, ZSM-5 and other materials, and there is very little information about the use of nano-concave clay

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