Desulfurizing agent for removing hydrogen sulfide from liquid phase hydrocarbon

Abstract

The invention discloses a desulfurizing agent for removing hydrogen sulfide from liquid phase hydrocarbon. The desulfurizing agent is characterized by consisting of the following components in percentage by weight: 20-80 percent of alcohol amine, 3-30 percent of hexamethylene tetramine, 1-15 percent of alcohol, 0.02-0.5 percent of defoaming agent and the balance of pH regulator and water. A production method of the desulfurizing agent comprises the following steps of: firstly, dissolving the hexamethylene tetramine into the water; secondly, adding the alcohol amine, the alcohol and the defoaming agent and fully dissolving; and lastly, adding an appropriate amount of pH value regulator to adjust the pH value to be between 6 and 9.5. The desulfurizing agent has the advantages of moderate pH value, nontoxicity, freeness from corrosion, emulsification, scaling and foaming, quick and complete reaction with the hydrogen sulfide in the liquid phase hydrocarbon and small consumption.

Description

technical field [0001] The invention relates to the field of petroleum and petrochemicals, in particular to a desulfurizer for removing hydrogen sulfide from liquid-phase hydrocarbons. Background technique [0002] In the petroleum system, a large amount of liquid hydrocarbons such as crude oil, refined oil, and liquefied gas must be processed. Some of these liquid hydrocarbons contain toxic, harmful, and highly corrosive hydrogen sulfide. In view of the requirements of operation, equipment and safe operation, hydrogen sulfide in liquid hydrocarbon must be removed. [0003] In the existing technology, there are many kinds of desulfurizers used for desulfurization and decarburization of acid gases, and most of the desulfurizers used for liquid phase hydrocarbons such as crude oil, refined oil, and liquefied gas similar to the present invention are to remove mercaptans, etc. Organic sulfur, and the chemical agents that can remove hydrogen sulfide from liquid hydrocarbons main...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The pH value is high and corrosive; generally, the pH value is greater than 10, which will cause "alkali embrittlement" and "pitting corrosion" to the equipment, which affects the safe operation of the equipment; 2. Serious emulsification; It will emulsify liquid hydrocarbons and water, making demulsification and dehydration difficult; 3. Severe fouling; most of the reaction products are insoluble in liquid hydrocarbons and deposited in process pipes and equipment, affecting normal production

[0005] The second category is oxidative desulfurizers. There are many such products. Generally, hydrogen peroxide, potassium permanganate, high-valent iron salts, ozone, sodium hypochlorite and other oxidants are used to oxidize hydrogen sulfide under the action of catalysts to achieve the purpose of desulfurization; its disadvantages extremely corrosive

[0006] The third category is aldehyde amine desulfurizer, such as ZL200910019796.4, which discloses a desulfurizer compounded with industrial formaldehyde and organic alcohol amine (MDEA) in a ratio of 2:8, although corrosion, emulsification and scaling are avoided However, it also has the disadvantages of strong toxicity, poor operation safety, and the foaming of liquid phase hydrocarbons seriously affects the removal effect.