Combined device for light oil product alkaline extraction-fixed bed catalytic oxidation sweetening
A technology for catalytic oxidative desulfurization and light oil products, which is only applied in the direction of multi-stage serial refining process treatment, etc., and can solve problems such as unreachable, difficult to handle, and high pressure on environmental protection
Inactive Publication Date: 2006-11-08
PETROCHINA CO LTD +1
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Problems solved by technology
The current liquefied gas sweetening process mainly has the following disadvantages: cobalt phthalocyanine catalysts in the alkali phase (liquid catalyst) are prone to aggregation and deactivation, resulting in frequent replacement of catalysts, and the cost of catalysts is quite high (800,000-1,000,000 yuan / ton). The production is affected to a certain extent; liquefied petroleum gas is extracted with lye containing catalyst for mercaptan, and sodium mercaptide is easy to generate disulfide in the presence of catalyst, which is brought into the refined liquefied gas product, reducing total removal Sulfur effect, often can not reach the total sulfur content -6 Requirements, so that the production of the next step is affected; when the liquefied gas is extracted with lye containing catalyst for mercaptan, the extraction efficiency is not high; Difficult to handle, high pressure on environmental protection
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[0013] The technical characteristics of the present invention will be described in detail below in conjunction with specific embodiments.
[0014] In actual process operation, according to the refining requirements of liquid hydrocarbons, the combined device of alkali extraction-fixed-bed catalytic oxidation sweetening is mainly implemented through the following methods.
[0015] 1. After alkali washing (liquid alkali washing or solid alkali washing) or non-alkali washing liquid hydrocarbons, enter the liquid-liquid reverse contact extraction tower for mercaptan extraction, and the liquid hydrocarbons after demercaptans directly enter the settling tank for sedimentation, The settled liquid hydrocarbons are then sent to subsequent treatment devices, etc.
[0016] 2. After alkali washing (liquid alkali washing or solid alkali washing) or non-alkali washing, the liquid hydrocarbons directly pass through the liquid-liquid static mixer, and then enter the settling separation tank, ...
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A technology that combines liquid-liquid alkali extraction and fixed-bed catalytic oxidation to remove mercaptans from light oil products. It mainly uses the combination of liquid-liquid alkali extraction and fixed-bed catalytic oxidation regeneration process to achieve the purpose of refining liquefied gas and other light hydrocarbons. The device has simple flow, convenient operation, and good desulfurization and desulfurization effects. The economic benefit and environmental protection effect are obvious, and compared with the current sweetening process, the waste lye discharge can be reduced by 80%. The invention is suitable for refining processes of domestic and foreign factories, mines, enterprise liquefied petroleum gas, oil field natural gas, light hydrocarbons, gasoline, diesel oil and other liquid hydrocarbons or gaseous hydrocarbons, and has broad industrial application prospects.
Description
technical field [0001] The invention relates to a technology for demercaptanization of light oil products by combining liquid-liquid agent alkali extraction and fixed bed catalytic oxidation. The light oil products here refer to refinery liquefied gas, oil field natural gas, light hydrocarbons, gasoline, diesel and other liquid hydrocarbons or gaseous hydrocarbons. This invention is an improvement to the oil refining method of petroleum and chemical enterprises. It mainly adopts the combination of liquid-liquid alkali extraction and fixed bed catalytic oxidation regeneration process to achieve the purpose of refining liquefied gas and other light hydrocarbons. Background technique [0002] The main component of liquefied petroleum gas is C 3 、C 4 Components, widely used as industrial and domestic gas; due to the rich olefin components (mainly propylene, isobutene and 1-butene) that can be used in chemical industry, it also occupies a huge chemical raw material market for t...
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IPC IPC(8): C10G53/14
Inventor 夏道宏项玉芝郭洪明张洪滨张振江吴力明
Owner PETROCHINA CO LTD