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Method and system for producing clean gasoline

A gasoline and clean technology, applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of increasing investment, increasing hydrogen consumption, reducing the octane number of catalytic gasoline of etherification products, etc.

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen etherification reaction in the second-stage reactor of this process has the following disadvantages: it is easy to saturate some olefins in the catalytic light gasoline in the hydrogen state, which not only increases the hydrogen consumption, but also reduces the etherification product. At the same time, due to the use of secondary hydrogenation, more hydrogen will be dissolved in the etherified gasoline product, and it is necessary to add a stabilizing tower to extract the hydrogen, which increases the investment of the device

Method used

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  • Method and system for producing clean gasoline
  • Method and system for producing clean gasoline
  • Method and system for producing clean gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A system for the production of clean gasoline: with such figure 2 structure shown.

[0075] The method for producing clean gasoline: the etherification catalyst used in the etherification process is a macroporous sulfonic acid cation exchange resin commercially purchased from Dandong Mingzhu Special Resin Co., Ltd., and the trade name is D005-ⅡS; the specific process flow is as follows:

[0076] The above-mentioned full fraction gasoline raw material 1 is mixed with hydrogen 2 and then transported to the refining reactor 3 (fluidized bed reactor), at a temperature of 429 ° C, a pressure of 2.6 MPa, and a volume space velocity of 6.5 h -1 , the volume ratio of hydrogen to hydrocarbons is under the hydrogen refining reaction conditions of 0.28, and the contact reaction with the refining agent obtains the refined reaction product 4; the refined reaction product 4 removes hydrogen and part of the following components of C4 through the light removal tower (tank) 5 6 Finall...

Embodiment 2

[0078] Systems for Producing Clean Gasoline: See figure 2 In the structure shown, the difference is that part of the isomerization product 36 is sent to the secondary etherification reactor 20 , and the rest is returned to the primary etherification reactor 13 .

[0079] The method for producing clean gasoline: with reference to Example 1, the difference is that the etherification catalyst used is a catalyst containing Y-type molecular sieves, and the catalyst preparation method refers to the document CN 105080589A; the etherification reaction temperature is 60-80 ° C; in addition, in two In the primary etherification reactor, the molar ratio of alcohol to active olefin in the mixture of the overhead azeotrope and the isomerization product is adjusted to 1.5:1, and the excess isomerization product is returned to the primary ether chemical reactor. The blended clean gasoline is denoted as S2, and the properties of the product are shown in Table 3.

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Abstract

The invention discloses a method and a system for producing clean gasoline. The method comprises the following steps: carrying out contact reaction on whole-fraction gasoline raw material and a refining agent to obtain refined gasoline, carrying out cutting and fractionation on the refined gasoline to obtain a light gasoline fraction and a heavy gasoline fraction; allowing the light gasoline fraction to contact with alcohol to carry out primary etherification reaction to obtain a first-stage etherification product; subjecting the first-stage etherification product to fractional distillation toobtain alcohol and a tower top azeotrope of mainly light hydrocarbon of C5 and a tower bottom first-stage etherification product, wherein part of the tower top azeotrope is subjected to water washingand olefin skeleton isomerization treatment to obtain isomerization product; the rest tower top azeotrope is subjected to contacting with the isomerization product and then subjected to secondary etherification reaction to obtain a secondary etherification product, and water washing treatment is performed on the secondary etherification product to obtain a secondary etherification product; collecting the heavy gasoline fraction, the tower bottom primary etherification product and the secondary etherification product to obtain clean gasoline. According to the method, the content of olefins inthe gasoline can be reduced, and meanwhile, the energy consumption and the circulation amount of alcohol are reduced.

Description

technical field [0001] The invention relates to the field of clean gasoline production, in particular to a method for producing clean gasoline and a system for producing clean gasoline. Background technique [0002] In recent years, with the increasingly stringent environmental protection regulations, countries and regions around the world have increasingly strict restrictions on the olefin content and sulfur content in gasoline, and the market demand for high-grade gasoline has also increased with the development of the automobile market; in order to adapt to Environmental protection and market demand, my country has also introduced the National VI standard that makes more stringent requirements for the olefin content in gasoline. The first stage of the National VI standard requires that the olefin content not exceed 18vol%, and the second stage requires that the olefin content not exceed 15vol%. However, at present, more than 70% of the gasoline in my country comes from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/202C10G2400/02
Inventor 袁清毛俊义李金芝赵志海黄涛王雷孔令江栗万博
Owner CHINA PETROLEUM & CHEM CORP