Fine desulfurizing agent for transforming thioalcohol in liquid hydrocarbons at normal temperature and preparation and application methods thereof

Abstract

The invention relates to a fine desulfurizing agent for transforming thioalcohol in liquid hydrocarbons at the normal temperature and preparation and application methods thereof. The fine desulfurizing agent is prepared from 1 to 3 of metallic compounds including load ferric chloride, cobalt acetate, nickel acetate, copper chloride, ammonium molybdate, zinc acetate, calcium nitrate, potassium nitrate, magnesium nitrate and the like by using active carbon as a carrier. The components of the fine desulfurizing agent are based on the mass of the carrier, and the total quantity of the loaded 1 to 3 metallic compounds is 10 to 30 percent of the carrier. The preparation method for the fine desulfurizing agent comprises the following steps of: firstly, soaking the carrier by using solution of the metallic compounds; secondly, spreading the mixture, drying the mixture in the shade, and drying the mixture at the temperature of between 100 and 150 DEG C for 2 to 4 hours; and activating the mixture for 3 hours in a nitrogen atmosphere at the temperature of between 200 and 500 DEG C to obtain the fine desulfurizing agent. The fine desulfurizing agent can be widely used for transforming the thioalcohol in the liquid hydrocarbons such as liquefied petroleum gas, solvent oil, naphtha and the like, and can transform the thioalcohol in the liquid hydrocarbons into disulfides under a condition that the temperature is between 30 DEG C below zero and 180 DEG C and the space velocity is between 0.01 to 15 per hour; the removal accuracy of the thioalcohol is removed from 1,000 mgS / L to below 5 mgS / L; and the fine desulfurizing agent ensures that the sulfur capacity of the fine desulfurizing agent is 2 to 15 weight percent in the liquid hydrocarbons after treatment through a doctor experiment.

Description

Technical field: [0001] The invention relates to a refined desulfurizer for converting mercaptans in liquid hydrocarbons at room temperature and a preparation and application method thereof. Background technique: [0002] Liquid hydrocarbons such as LPG (liquefied petroleum gas), solvent oil, and naphtha often contain different amounts of mercaptans. The presence of mercaptans will lead to the rapid deactivation of catalysts in the later stage, and the product quality is unqualified, resulting in low efficiency; mercaptans Lively in nature and easy to oxidize, when there is mercaptan in liquid hydrocarbons, it will not only produce stench, but also lead to a decline in the stability and quality of oil storage; mercaptan has weak acidity, and mercaptan in oil has a negative Pipelines are corrosive, which not only causes losses caused by corrosion, but also poses safety hazards in production, storage and long-distance transportation; mercaptans are extremely harmful to humans ...

AI Technical Summary

Problems solved by technology

[0006] To sum up, the existing deodorization methods and catalysts at home and abroad have several disadvantages: (1) the existing deodorization methods and catalysts need to use a large amount of lye, resulting in a large amount of spent alkali, the cost of spent alkali treatment is high, and the environment is polluted; (2) In the current deodorization method, the pre-alkali washing in the front and the catalytic oxidation in the back are all operations with alkali, and the lye is inevitably entrained in the oil after treatment, which affects the quality of the oil and increases the burden on the oil. Corrosion of oil storage equipment; (3) The current deodorization method requires oxygenation operation, and also realizes the separation of oil and lye and the recycling of lye, resulting in large equipment investment, complicated process, and high operating costs; (4) The Merox deodorization catalyst utilizes the weak acidity of mercaptans. As the molecular weight of mercaptans increases, the acidity becomes weaker and weaker. High molecular weight mercaptans cannot react with alkalis, so they cannot be converted by Merox deodorization process.