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Pre-etherification reaction method in light petrol etherification technology

A light gasoline, chemical reaction technology, applied in the petroleum industry, processing hydrocarbon oil, etc., can solve the problems of shortening the process flow, achieve the effects of shortening the process flow, realizing continuous production, and high sulfonic acid group content

Active Publication Date: 2014-02-12
KAIRUI ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

[0012] Before entering the catalytic distillation tower, using light gasoline and methanol as raw materials, a continuous catalytic pre-etherification reaction is carried out in an external membrane reactor. The catalyst uses a fine-grained styrene-based cation exchange resin catalyst to constitute a reaction and separation coupling system. It effectively solves the problem of catalyst recycling, shortens the process flow, and realizes the continuous production process

Method used

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  • Pre-etherification reaction method in light petrol etherification technology

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Embodiment 1

[0024] Equipment: XS-T type external membrane reactor 10L, produced by Nanjing University of Technology, the structure includes a reactor and a ceramic membrane filter.

[0025] Process flow: add light gasoline, methanol and catalyst into the above-mentioned external membrane reactor according to the weight ratio of 1:0.1:5, light gasoline and methanol are mixed after the reaction materials are preheated, and are carried out in the reactor at a set molar ratio Continuous etherification reaction. The catalyst is a D006-7 resin catalyst with a particle size of 70-100 mesh produced by 2L Kairui Chemical Co., Ltd., the water in the catalyst is replaced with methanol to a water content of ≤1%, the reaction temperature is 80°C, and the space velocity is 1h -1 , the mass ratio of alcohol to oil is 0.01, and the reaction pressure is 0.4MPa. The reaction mixture is pumped from the bottom of the reactor to the ceramic membrane filter. Under a certain pressure difference, the separation ...

Embodiment 2

[0027] Reaction temperature 90 ℃, others are the same as embodiment 1. The product number obtained by pre-etherification is KRB-2.

Embodiment 3

[0029] Airspeed 3h -1 , other with embodiment 1. The product number obtained by pre-etherification is KRB-3.

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Abstract

The invention provides a pre-etherification reaction method in a light petrol etherification technology, which comprises the steps that light petrol, methanol and a catalyst are added into an external membrane reactor comprising a reaction kettle and a ceramic membrane filter at a weight ratio of 1:(0.01-0.1):(1-20); the catalyst is a fine-grained styrene cation exchange resin catalyst; the light petrol and methanol perform continuous catalytic etherification reaction in the reaction kettle; a reaction mixture is pumped to the ceramic membrane filter from the bottom of the reaction kettle for catalyst and reaction product separation; a separated product penetrates from a membrane tube as clear liquid; the flow of the membrane penetrating liquid is controlled to be the same as the total amount of a reactant entering the reaction kettle; the reaction product performs further etherification reaction; concentrated liquid containing the catalyst returns to the reaction kettle. Since the method employs the external membrane reactor and the fine-grained resin catalyst, a catalytic effect is significantly improved.

Description

technical field [0001] The invention relates to a method for removing olefins in light gasoline, in particular to a method for pre-etherification reaction in the etherification process of light gasoline. Background technique [0002] Light gasoline etherification technology utilizes tert-amylene and tertiary-hexene in catalytic cracking gasoline to react with methanol to form ether compounds such as TAME and THXME, which can increase gasoline octane number and reduce olefin content and vapor pressure. The etherification of light gasoline is mainly the etherification reaction of etherifiable olefins in gasoline with methanol under acidic catalyst conditions, and mainly C 5 、C 6 The etherification reaction of etherizable olefins generates corresponding ether products, wherein 2-methylbutene-1 and 2-methylbutene-2 ​​react as follows: [0003] [0004] BP Petroleum Company's etherification technology uses a three-functional catalyst that combines hydrogenation, isomerizatio...

Claims

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Application Information

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IPC IPC(8): C10G57/00
Inventor 王金明张勇
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH