Method for preparing gasoline from liquefied gas through aromatization and fixed bed reactor

A fixed-bed reactor, liquefied gas technology, applied in the petroleum industry, liquid hydrocarbon mixture production and other directions, can solve problems such as unfavorable production operations, shortened catalyst single-pass life, increased equipment investment and maintenance costs, etc. The effect of relieving market pressure and improving production efficiency

Inactive Publication Date: 2010-10-13
宝塔国际石化工程技术有限公司
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Problems solved by technology

However, under low temperature conditions, when liquefied gas produces light aromatic gasoline components, oligomerization, cyclization and aromatization reactions are the dominant reactions, which is a strong exothermic reaction, and the temperature rise of the bed is relatively high; with the increase of reaction temperature increase, the side reaction speed is accelerated, dry gas, coke and other by-products increase, and the single-pass life of the catalyst is shortened; in order to reduce the temperature rise of the bed, and on the premise of ensuring production capacity, multiple fixed-bed reactors are often used in series / Parallel mode, adding heat exchangers between the reactors to take away heat to ensure a suitable reaction temperature; although this method can effectively control the reaction temperature, it increases equipment investment and maintenance costs, and is not conducive to production operations

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  • Method for preparing gasoline from liquefied gas through aromatization and fixed bed reactor

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Embodiment Construction

[0016] The process of producing high-octane gasoline by aromatization of liquefied gas consists of three parts: raw material pretreatment, cyclic reaction and regeneration, and absorption and stabilization; the liquefied gas raw material is first washed with water to remove impurities such as methanol, dimethyl ether, and alkali nitrogen, and then passes through a heat exchanger. After the heating furnace is heated to about 300 ℃, it enters the fixed-bed reactor and reacts at 280-410 ℃; the reacted product is separated by the absorption stabilization system to obtain high-octane gasoline, liquefied gas and other products, A small amount of dry gas is by-produced; after the reaction is carried out for a period of time, with the increase of the coking amount of the catalyst in the reactor, when the product quality or product distribution cannot meet the requirements, it means that the catalyst is saturated, the reaction needs to be stopped, and high temperature nitrogen is used in...

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Abstract

The invention relates to a method for preparing gasoline from liquefied gas through aromatization. A technical process of the invention consists of three parts: raw material pretreatment, circular reaction and regeneration, and absorption and stabilization. The method comprises the following steps: firstly, washing liquefied gas raw materials by water for removing impurities; making the water washed liquefied gas enter a fixed bed reactor for carrying out reaction under the condition of 280 to 410 DEG C; and carrying out product separation on products after reaction through an absorption and stabilization system. Compared with the prior art, the invention can realize the continuous production without adding an external cooling device, the investment is saved, the operation link is reduced, and the production efficiency is obviously improved.

Description

Technical field: [0001] The invention belongs to the field of organic chemical synthesis, in particular to a method for preparing gasoline by aromatization of liquefied gas and a fixed bed reactor. Background technique: [0002] Liquefied gas (LPG) is one of the petroleum products. It is a colorless and volatile gas obtained by pressurizing, cooling and liquefying refinery gas. The main components are propane, propylene, butane, butene, and a small amount of pentene Alkane, pentene and trace sulfur compounds impurities. [0003] At present, my country's liquefied petroleum gas is mainly burned as a civil fuel, the chemical utilization rate is insufficient, and the economic benefits are low; as the civilian fuel market of liquefied petroleum gas has been gradually replaced by relatively cheap pipeline natural gas in recent years, the market prospect of liquefied petroleum gas Not optimistic, economic benefits will further decline. On the other hand, at present, 80% of the bl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00
Inventor 陈宝林曾贤林郭辅堂刘志华成小玲
Owner 宝塔国际石化工程技术有限公司
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