Desulfurizer composition for removal of sulfides in MTBE

Abstract

The invention relates to a desulfurizer composition for removal of sulfides in MTBE. The desulfurizer composition is composed of the following components by weight percentage: 60-100% of a main absorbent, and 0-10% of a conditioning agent, wherein the main absorbent is a petroleum product with a distillation range of 140-250DEG C. The desulfurizer composition provided by the invention can remove thioether, disulfide, thiophenic sulfur and other sulfides in MTBE, ensures that the total sulfur of MTBE decreases from hundreds or even thousands of microgram/g to less than microgram/g, the desulfurization effect is obvious, so that as a blending component of gasoline, the desulfurizer composition ensures the quality upgrading of gasoline, and reduces the influence of sulfur-containing tail gas on the environment. In addition, the desulfurizer adding amount can be flexibly adjusted according to the sulfur content of different products so as to reduce the energy consumption and production cost. Also, the sulfur-rich desulfurizer waste liquid can be recycled, causes no secondary pollution emission, and is energy saving and environment-friendly.

Description

Technical field [0001] The invention relates to the technical field of petrochemical desulfurization, and in particular to a desulfurizer composition for removing sulfide in MTBE. Background technique [0002] Methyl tert-butyl ether (MTBE) has become the main blending component for improving the octane number of gasoline and diesel and adding oxygenated compounds due to its high octane number and good blending performance. The blending ratio is generally 8%-15 %. At present, the sulfur content of MTBE products produced from refining catalysis and coking units produced liquefied petroleum gas mixed with carbon four as raw materials varies greatly, usually 100 to 500 μg / g, and some as high as 1000 μg / g. When producing National V vehicle gasoline, even if S-Zorb and other advanced technologies are used to reduce the sulfur content of catalytic gasoline to below 10 μg / g, the sulfur content in MTBE still needs to be reduced to meet the sulfur content index of National V vehicle gaso...

AI Technical Summary

Problems solved by technology

[0005] Source control: use advanced technology to remove mercaptans and neutral sulfur in liquefied gas as much as possible, and control the total sulfur of MTBE from the source. Sulfur is difficult to remove, resulting in high total sulfur in subsequent MTBE;

[0006] C4 desulfurization: Alkali washing and similar molecular sieve absorption combination process are used to carry out fine desulfurization of C4 (ie MTBE raw material) after gas separation, but the cost of fine desulfurization is as high as hundreds of yuan / ton, and there are also complicated molecular sieve regeneration operations and labor intensity big problem

[0007] Deep desulfurization of liquefied gas + MTBE extraction and distillation: Renovate the desulfurization system of liquefied gas, add three-phase mixed regeneration tower, reverse extraction fiber membrane and other equipment, reduce the sulfur content of refined liquefied gas; add an extraction distillation tower to the MTBE unit , the heavy component sulfur in MTBE is removed by distillation and extraction by adding an adsorbent. The investment in this process is relatively large, and when the total sulfur in MTBE is higher, the amount of adsorbent used will be greater, and the operating cost and additive cost actually exceed 150 yuan / ton

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