Sorbent for reducing sulfur content of light hydrocarbon oil

Abstract

The invention provides a sorbent used for reducing the content of sulfur in light hydrocarbon oil. According to weight percentage, the sorbent comprises 1-30 percent of phosphorus-modified rare earth faujasite, 5-40 percent of active metal oxide and 30-94% of carrier; wherein, the carrier comprises alumina and zinc oxide; the rare earth faujasite is modified by phosphorus and is pre-formed into porous heat-resistance solid grains together with carrier mixture; subsequently, the active metal oxide is led into the solid grains, thus preparing the sorbent; the light hydrocarbon oil raw material containing the sulfur and hydrogen donor enter a reactor filled with the sorbent; the materials are separated after reaction; the reaction products are sent to a subsequent separation system so that the product is separated; the sorbent to be regenerated after reaction is stripped, burned and regenerated; and the regenerated sorbent is reduced by the hydrogen donor and subsequently returns to the reactor so as to be circularly used. The sorbent realizes that the sulfur of light hydrocarbon oil is deeply removed, and simultaneously, the octane number of the outcome gasoline is higher, while thebenzene content is lower and the strength is higher.

Description

technical field [0001] The invention belongs to an adsorbent for reducing sulfur content in light petroleum hydrocarbons and its preparation and application. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on sulfur content in light hydrocarbon oil used as fuel are becoming more and more stringent. Taking gasoline as an example, the U.S. Environmental Protection Agency (EPA) stipulates that the sulfur limit is 30 μg / g (Tier II); Europe requires gasoline sulfur content to be less than 50 μg / g (Euro IV emission standard); China will gradually limit gasoline sulfur content With international standards. Therefore, the hydrocarbon oil must be deeply desulfurized to meet the requirements. [0003] At present, in addition to hydrogenation technology, the deep desulfurization method of oil products, the removal of sulfur compounds in fuel oil by adsorption method is also a very attractive technology in recent years....

AI Technical Summary

Problems solved by technology

Although the above-mentioned patents have achieved deep desulfurization of hydrocarbon oils under low hydrogen consumption, the octane number of gasoline products still has a slight loss

[0004] CN1261218C, CN1583973A, and CN1583972A all use zeolite desulfurizers to crack and desulfurize light oil products under non-hydrogen-facing conditions, and selectively crack sulfides to convert them into hydrocarbons and inorganic sulfides without hydrogen consumption and octane loss, but , like heavy oil catalytic cracking desulfurization, its desulfurization rate is affected by the sulfur content of raw materials, catalyst properties and conversion depth, etc., which is not enough to achieve deep desulfurization. The desulfurization rate is generally 50-80%, and it can only be used to produce low-sulfur refined oil. , low octane loss

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