42results about How to "High desulfurization depth" patented technology

The invention provides a quality improvement method of catalytic cracking gasoline. The quality improvement method comprises the following steps of: cutting a gasoline raw material into light, medium and heavy gasoline fractions; desulfurizing the medium gasoline fraction to obtain first desulfurized medium gasoline fraction; carrying out aromatization / hydroisomerization reaction on the first desulfurized medium gasoline fraction in the presence of a catalyst to obtain second desulfurized medium gasoline fraction; carrying out selective hydrodesulfurization on the heavy gasoline fraction to obtain desulfurized heavy gasoline fraction; mixing the light gasoline fraction, the second desulfurized medium gasoline fraction and the desulfurized heavy gasoline fraction to obtain quality improved gasoline, wherein the cutting temperature of the light and medium gasoline fractions is 35-60 DEG C, and the cutting temperature of the medium and heavy gasoline fraction is 70-130 DEG C. The quality improvement method provided by the invention can not only realize the deep desulfurization of the catalytic cracking gasoline, but also be used for outstandingly increasing the octane value.

A fuel oil deep adsorption desulfurization catalyst, characterized in that the catalyst includes an active component, a sulfur adsorbent, and a binder, wherein the active component is one or more of Ni, Co, Cu, W, and Mo oxides, The sulfur adsorbent is at least one of Mg, Ca, Zn, Ce, Fe, Mn, Ti oxides, the mass percentage of the active component is 2wt%-50wt%, and the mass percentage of the sulfur adsorbent is 20 wt%-90wt%, the rest are binders, and the binders are alumina, pseudoboehmite, kaolin, montmorillonite, bentonite, montmorillonite, diatomaceous earth, silica sol, silica gel, One or a mixture of expanded perlite. The invention has the advantages of high specific surface area, mild reaction, high strength and low hydrogen consumption.

The invention relates to a catalytically cracked gasoline deep desulfurization method which comprises the following steps: 1. carrying out thiolation reaction, wherein the gasoline is divided into a light component and a heavy component by a rectification tower after reaction; 2. carrying out selective hydrodesulfurization and isomerization on the heavy component; 3. after the selective hydrodesulfurization process, carrying out hydrodesulfurization on secondary mercaptan; 4. etherifying the light gasoline; and 5. finally, blending the light and heavy components to obtain the ultralow-sulfur gasoline product which conforms to the national V gasoline quality standard. The technique is suitable for hydrogenation modification of the catalytically cracked gasoline, and has the advantages of high desulfurization percent, high liquid yield, high catalyst stability of all units, long service life and no discharge of caustic sludge in the whole process.

The invention relates to a combination method for deep desulfurization of liquefied gas; the liquefied gas is fed into an extraction tower, and is contacted with incoming lye in countercurrent, and the desulfurized liquefied gas and regenerated lye enter a static mixer to mix for second-stage extraction, and the mixed liquid is liquefied The gas-alkali-liquid separation tank is separated, the liquefied gas is sent to be washed with water, the uncooked alkali solution flowing out from the bottom of the extraction tower enters the flash tank, the residual liquefied gas is discharged from the top of the tank and sent to the gas system, and the uncooked solution obtained at the bottom of the tank is heated After that, it enters the supergravity reactor and reacts with non-purified wind. The tail gas discharged from the supergravity reactor is removed from the lye by the coalescer and sent back to the flash tank. The purified tail gas is returned to the supergravity reactor for recycling, and the rich diesel oil discharged from the bottom of the tower is sent to the diesel hydrogenation unit, and the regenerated lye obtained is recycled; this method has deep desulfurization depth, high quality regenerated lye, simple and reliable equipment, and low cost. The discharge of three wastes is less, and the whole process meets the requirements of environmental protection.

The invention provides a gasoline desulfurization method. The gasoline desulfurization comprises the following steps: cutting a gasoline raw material into a light gasoline fraction and a heavy gasoline fraction; performing adsorption desulfurization on the light gasoline fraction to obtain desulfurized light gasoline fraction; and performing selective hydrogenation desulfurization on the heavy gasoline fraction to obtain desulfurized heavy gasoline fraction, wherein the cutting temperature of the light gasoline fraction and the heavy gasoline fraction is 70-110 DEG C. By adopting the gasoline desulfurization method, not only can deep desulfurization of gasoline be realized, but also the octane loss is low.

The invention relates to a deep desulfurization technology for liquefied petroleum gas. A carbonyl sulfate water-washing tower is adopted to remove hydrogen sulfate and carbonyl sulfate in the liquefied petroleum gas respectively according to different nature characteristics of sulfides contained in the liquefied petroleum gas, small-molecular mercaptan in the liquefied petroleum gas is converted into disulfides with higher boiling points through an oxidation tower, then the sulfides and a liquefied petroleum gas product are separated with a rectification method, sulfur-enriched C5 or heavy C4 components are arranged at the tower bottom, and the ultra-low-sulfur liquefied petroleum gas product is arranged at the tower top. The content of sulfur in the liquefied petroleum gas is decreased to be lower than 5 mu g / g in the process, the desulfurization rate is high, and no alkali residue is discharged.

The invention discloses a gasoline desulfurization agent and a preparation method and application thereof. The gasoline desulfurization agent is composed of the following raw materials of, by weight, 21-29 parts of illite, 1-5 parts of perilla alcohol, 3-7 parts of salicylic acid and 5-12 parts of triethylene diamine. The illite is smashed and added to the triethylene diamine solution to be subjected to sealing, heating and stirring treatment, then the salicylic acid is dropwise added, ultrasonic treatment is conducted, then the perilla alcohol solution is added and stirred till being dry, and the desulfurization agent is obtained after calcination. Under the situation that the RON loss of gasoline is smaller than 2.0, the ultra-low sulfur content gasoline with the sulfur content being below 6 microgram / g can be obtained. The sulfur selectivity is good, the desulfurization depth is high, the octane number loss caused by olefin hydrogenation saturation is avoided while sulfur-containing compounds in the gasoline are deeply removed, the service life is long, and the gasoline desulfurization agent is environmentally friendly, free of secondary pollution and good in regeneration performance. The preparation process is simple, the raw materials are easy to obtain, the production cost is low, and the gasoline desulfurization agent is suitable for industrial production.

The invention provides a refinery rich gas pretreatment method and a dry gas and / or liquefied petroleum gas desulfurization method. The refinery rich gas pretreatment method comprises the step of contacting the refinery rich gas with a purifying agent. The refinery rich gas pretreatment method can reduce the desulfurization load of downstream products including dry gas and liquefied gas of the refinery rich gas, reduce the environmental protection pressure of desulfurization of the dry gas and the liquefied gas and improve the desulfurization depth of the dry gas and the liquefied gas, and particularly can break through the limit of the prior art of desulfurization of the liquefied gas. The dry gas and / or liquefied gas desulfurization method can be used to carry out deep desulfurization onthe dry gas and / or liquefied gas in order to obtain dry gas and / or liquefied gas with an extremely low sulfur content.

The invention provides a hydrogenation method for deeply desulfurizing gasoline. The hydrogenation method comprises the steps that catalytically cracked gasoline is fractionated into light fractions and heavy fractions; the heavy fractions and hydrogen are mixed and enter into a first hydrogenation reaction zone to react to obtain low-sulfur heavy fraction oil, and the recycle hydrogen obtained through separation is recycled after desulfurization; the light fractions and hydrogen are mixed and enter into a second hydrogenation reaction zone, diene is subjected to hydrogenation saturation to obtain mono-olefin low-boiling sulfides and the mono-olefin low-boiling sulfides are converted to high-boiling sulfides; the hydrogenated light fraction oil enters a light-medium fraction fractionating tower and is divided into light fractions and medium fractions and low-sulfur light fraction oil is obtained; the medium and light fractions and hydrogen are mixed and enter into a third hydrogenation reaction zone to react to obtain low-sulfur medium fraction oil, and the recycle hydrogen obtained through separation is recycled after desulfurization; and the heavy fraction oil, the light fraction oil and the medium fraction oil are mixed to obtain the low-sulfur gasoline product. Aiming to produce the gasoline with sulfur content not more than 10mu g / g, the method provided by the invention has the characteristics of high desulfurization depth, long device running period and the like.

The invention provides a method for producing desulfurized gasoline. The method for producing the desulfurized gasoline comprises the following steps: cutting gasoline feedstock into a light gasoline fraction, a medium gasoline fraction and a heavy gasoline fraction; sweetening the light gasoline fraction to obtain the sweetened light gasoline fraction; desulfurizing the medium gasoline fraction by adsorption to obtain the desulfurized medium gasoline fraction; performing selective hydrodesulfurization of the heavy gasoline fraction to obtain the desulfurized heavy gasoline fraction; mixing the sweetened light gasoline fraction, the desulfurized medium gasoline fraction and the desulfurized heavy gasoline fraction to obtain the desulfurized gasoline, wherein the cutting temperature of the light and medium gasoline fractions is 35-60 DEG C, and the cutting temperature of the medium and heavy gasoline fractions is 70-130 DEG C. The method for producing the desulfurized gasoline disclosed by the invention not only can achieve the deep desulfurization of gasoline, but also has small octane loss.