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Gasoline-oxidation ammonia-process desulfurization method

An ammonia oxidation and ammonia desulfurization technology, which is applied in the fields of chemical industry, environmental protection and oil refining to achieve the effect of high desulfurization efficiency, overcoming long process and moderate reaction conditions.

Inactive Publication Date: 2015-09-30
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, gasoline and gasoline adsorption desulfurization technology is a new technology developed in recent years to produce low-sulfur vehicle engine fuels. It has been reported that molecular sieves and modified activated carbons are used to remove sulfur compounds in gasoline, but there is still great room for improvement in cost and efficiency

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Examples

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Effect test

Embodiment 1

[0038] Under 0.1MPa (G), 30 ℃ of reaction conditions, in the suspended bed reactor that is filled with 100g acetic acid, sulfuric acid, molecular sieve mixed catalyst, gasoline (sulfur content 1750ppm) is passed into from the reactor top with 1.5L / h rate, Air is introduced from the bottom of the reactor at a rate of 40L / h, and the desulfurized gasoline is discharged from the bottom, and the sulfur content is 8.2ppm after detection.

[0039] After the catalytic oxidation reaction, the reaction tail gas containing 0.46% SOx is discharged from the top of the reactor, sent to the ammonia desulfurization device, the absorbent is 11% ammonia water, and the specific gravity of the absorption liquid is 1.15g / cm 3 , pH5.7, circulation volume 3.1L / h, sulfur dioxide content in clean gas 30mg / Nm 3 . The obtained ammonium sulfate solution accumulates to a certain concentration, and after evaporation and crystallization, solid-liquid separation, and drying, the ammonium sulfate solid is ob...

Embodiment 2

[0041] Under the reaction conditions of 0.15MPa(G) and 40°C, in a suspended bed reactor filled with 200g of oxalic acid, phosphoric acid, and molecular sieve mixed catalyst, gasoline (sulfur content 1250ppm) was fed from the top of the reactor at a rate of 20L / h , using 28% oxygen enrichment to pass through the bottom of the reactor at a rate of 200L / h, and the finished gasoline after desulfurization is discharged from the bottom, and the sulfur content is 7.6ppm after detection.

[0042]After the catalytic oxidation reaction, the reaction tail gas containing 0.88% SOx is discharged from the top of the reactor, sent to the ammonia desulfurization device, the absorbent is liquid ammonia, and the specific gravity of the absorption liquid is adjusted to 1.16g / cm 3 , pH6.3, circulation volume 34.1L / h, sulfur dioxide content in clean gas is 25mg / Nm 3 . The obtained ammonium sulfate solution accumulates to a certain concentration, and after evaporation and crystallization, solid-li...

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Abstract

The invention discloses a gasoline-oxidation ammonia-process desulfurization (GOA) technique which comprises the following steps: 1) oxidation reaction: selectively oxidating sulfur-containing compounds in gasoline by using an oxidant in the presence of a catalyst to obtain an oxidation product containing sulfur dioxide reaction exhaust (gasoline with the sulfur content of not greater than 10 ppm) and a reaction exhaust containing 0.02-1% of SOx, wherein the gasoline also comprises the intermediate component of the gasoline finished product; and 2) ammonia-process desulfurization: treating the reaction exhaust by an ammonia-process desulfurization technique to convert the sulfur dioxide into an ammonium sulfate chemical fertilizer, and discharging clean gas after reaching the standard. The method has the advantages of simple process and no secondary pollution, and can be widely used in petroleum refining industry.

Description

technical field [0001] The invention relates to clean gasoline production technology, in particular to a method for ammonia oxidation desulfurization of gasoline (catalytically cracked gasoline, straight-run gasoline, naphtha, coker oil). It belongs to the technical fields of oil refining, chemical industry and environmental protection. Background technique [0002] Gasoline ammonia oxidation desulfurization technology has been paid more and more attention. With the increasingly stringent environmental protection regulations, the quality requirements for vehicle engine fuels are becoming more and more stringent worldwide, followed by the emergence of "clean fuels" with low sulfur, low aromatics and low olefin content, and the problem of sulfur content has become a domestic issue. The production of low-sulphur, especially ultra-low-sulphur vehicle engine fuel by major foreign oil refining enterprises has put forward stricter requirements for vehicle fuel oil. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/04C10G27/14B01D53/78B01D53/50C01C1/24
Inventor 祁丽昉张军罗勇迎王甫来徐建东
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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