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Inferior gasoline upgrading method

A low-quality gasoline and upgrading technology, applied in the direction of naphtha catalytic reforming, etc., can solve the problems of limited development and low yield of straight-run gasoline, and achieve the effects of prolonging the operation cycle, increasing the yield, and increasing the blending ratio

Active Publication Date: 2009-04-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively utilizes the C4 fraction in the refinery to upgrade straight-run gasoline, but due to the low yield of straight-run gasoline in my country, and it is a high-quality raw material for ethylene cracking and reforming, the development of this process is limited.

Method used

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Experimental program
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Effect test

example 1

[0031] Catalysts used in the present invention are prepared.

[0032] (1) Prepare the carrier: get 130 grams of HZSM-5 zeolite powder (produced by Shanghai Huaheng Catalyst Factory) with a silica / alumina molar ratio of 56, and 90 grams of α-alumina monohydrate powder (produced by German Condea Company), mix Evenly, add a solution made of 2 ml of 1:1 nitric acid and 50 ml of deionized water, knead into a dough, extrude into strips with a diameter of 2 mm and a length of 2 to 4 mm in an extruder, and dry at 110 ° C for 10 hours. Baking at 550°C for 4 hours.

[0033] (2) Introduce active components: Take 100 grams of the above-mentioned carrier, use 100 milliliters containing 2.28 grams of mixed rare earth chloride (produced by Inner Mongolia Baotou Rare Earth Industry Company, wherein 31% by mass of lanthanum oxide, 51% by mass of cerium oxide, 14% by mass praseodymium oxide and 4% by mass neodymium oxide) in an aqueous solution at 70°C for 2 hours, dried at 110°C for 10 hours,...

example 2

[0037] On the 100mL single-tube fixed-bed test device, fill 100mL catalyst A in a reactor, with the carbon four fraction shown in 20 mass % table 1 and the hydrocoking gasoline shown in 80 mass % table 2 as raw material, at 0.3 MPa, mass space velocity 0.4hr -1 , Control the octane number of gasoline products to 86, and carry out the non-hydrogen modification reaction under the conditions of 330-450°C. Among them, the C4 fraction is divided into two streams and enters the reactor according to the method shown in Figure 1. The first stream enters the reactor from the top after being mixed with hydrocoking gasoline, and the second stream enters the reactor from the middle. The reaction results are shown in Table 3.

example 3

[0048] On the 100mL multi-tube fixed-bed test device, 100mL catalyst A was loaded in equal proportions in three series reactors, with 60% by mass of carbon four cuts and 40% by mass of hydrocoked gasoline as raw materials, at 0.3MPa, mass Airspeed 0.4hr -1 1. Control the gasoline product with an octane number of 88 and a reaction temperature of 330-450°C to carry out the non-hydrogen upgrading reaction, and divide the C4 fraction into three streams and enter the top of each reactor in equal proportions. The reaction results are shown in Table 4.

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Abstract

A modification method of inferior gasoline includes the following steps: the inferior gasoline is mixed with C4 fraction and introduced into a reactor as raw materials of reaction, and the mixture contacts and reacts with catalyst under the conditions without hydrogen; and the C4 fraction is divided into two strands at least and enters the reactor from different positions. The method is used for the modification reaction of the inferior gasoline, and can increase the doping amount of the C4 fraction, improve the production rate of gasoline, and prolong the serve life of the catalyst.

Description

technical field [0001] The invention is a method for upgrading low-quality gasoline, specifically, a method for producing high-octane and low-olefin clean gasoline components by using carbon four fractions and low-quality gasoline. Background technique [0002] With the improvement of environmental protection requirements, major cities in my country implemented new gasoline standards in 2007: the sulfur content is not more than 0.015%, the olefin content is not more than 25%, the benzene content is not more than 1.0%, and the aromatic content is not more than 35%. At present, FCC gasoline accounts for more than 80% of finished gasoline in my country, and its olefin content is as high as 50-55%. At present, the production capacity of alkylation, etherification and isomerization units in my country's refineries is very small, mainly relying on catalytic reforming units to produce high-octane clean gasoline blending components. However, due to insufficient reforming raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/04
Inventor 赵雅郡孟宪波任坚强于中伟张新宽陈春芳
Owner CHINA PETROLEUM & CHEM CORP
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