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C5 and/or C6 alkane isomerization process

A technology of isomerization and isomerization of alkanes, which is applied in the field of isomerization of C5 and/or C6 alkanes, can solve the problem of accelerated carbon deposition rate, decreased liquid yield of isomerization products, and affecting the service life of isomerization catalysts To achieve the effect of optimizing isomerized raw materials and prolonging the use time

Active Publication Date: 2012-10-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reaction process, the reaction temperature needs to be increased correspondingly with the reduction of catalyst activity, and the increase of temperature is more likely to cause ring opening, hydrogenation reaction and then cracking into small Molecular alkanes lead to a decrease in the liquid yield of isomerization products, and at the same time, the carbon deposition rate of the catalyst is accelerated at high temperature, which will affect the service life of the isomerization catalyst

Method used

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  • C5 and/or C6 alkane isomerization process
  • C5 and/or C6 alkane isomerization process
  • C5 and/or C6 alkane isomerization process

Examples

Experimental program
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Effect test

example 1

[0024] Prepare the zeolite catalyst according to the method of CN99105790.2 Example 1.

[0025] Get 100 grams of sodium-type mordenite (produced by Fushun Petroleum No. 4 Exchange the Cl solution at 90-95°C for 3 hours, filter, wash the obtained solid with deionized water, dry at 120°C for 3 hours, repeat the operation twice, and then treat it with 800 ml of 1 mol / L hydrochloric acid at 90-95°C for 3 hours , filtered, washed with deionized water until the filtrate was neutral, and roasted at 600°C for 6 hours to make a SiO with a sodium content of 0.03% by mass. 2 / Al 2 o 3 Hydrogen-type mordenite with a molar ratio of 23.4 (measured by fluorescence spectrometry).

[0026] Take 100 grams of sodium Beta zeolite (produced by Fushun Petroleum No. 3 Plant) with a silica / alumina molar ratio of 28.6, and prepare hydrogen Beta zeolite with a sodium content of 0.03% by weight according to the above-mentioned ammonium exchange method.

[0027] Mix the above-mentioned hydrogen-type ...

example 2

[0030] Prepare solid superacid catalyst by the method for CN03105390.4 example 3.

[0031] (1) Preparation of hydrated zirconia

[0032] Halochloride (ZrOCl 2 ·8H 2 O) be made into an aqueous solution of 5% by mass, slowly add ammoniacal liquor with a concentration of 25% by mass while stirring, adjust the pH value to 10, move the resulting zirconium hydroxide precipitate together with the solution to an autoclave for sealing, and perform hydrothermal treatment at 130° C. for 24 hours . The solid was washed with deionized water and filtered until the filtrate was free of chloride ions. Dry at 110°C for 24 hours to obtain hydrated zirconia powder.

[0033] (2) Preparation of a mixture of silica and alumina

[0034] Take 25 grams of silica sol (SiO 2 Content is 41 mass %) join in the solid powder of 54 grams of aluminum hydroxide (Germany, Condea company, brand SB), grind uniformly, 110 ℃ of drying 24 hours, add the NH of 10% 4 200 ml of Cl solution was refluxed under sti...

example 3

[0038] The isomerization reaction is carried out by using the method of the present invention on a small fixed-bed reaction device.

[0039] Charge catalyst A in the reactors connected in series of small fixed-bed devices, and the loading is as follows: 10 grams in the first reactor, and 20 grams in the second reactor. After the filling is completed and the airtight inspection is qualified, hydrogen gas is introduced to raise the temperature to 450°C, reduce for 2 hours, cool down to 220°C, and feed the raw material oil with the composition shown in Table 1, and the feed quality space velocity is 1.2 hours -1 , the hydrogen / hydrocarbon molar ratio is 4, the reaction is under the condition of pressure 1.7MPa, and the temperature of the two reactors is gradually adjusted with the reaction time, and the reaction results are shown in Table 2.

[0040] Table 1

[0041]

[0042] Table 2

[0043]

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Abstract

A C5 and / or C6 paraffin isomerization method comprises the steps: the C5 and / or the C6 paraffin passes through at least two reactors which are connected in series to be contacted with a catalyst thereof under the isomerization condition to carry out the isomerization reaction; the load of the catalyst of the later reactor is 2 to 6 times of the load of the catalyst of the first reactor in the reactors which are connected in series. The method can improve the product isomerization rate and the liquid yield and prolong the service life of the catalyst by being used in the C5 and / or the C6 paraffin isomerization reaction.

Description

technical field [0001] The present invention is a kind of light alkane isomerization method, specifically, is a kind of C 5 and / or C 6 Alkanes isomerization method. Background technique [0002] At present, with the increasingly stringent environmental protection requirements, low-lead or unleaded gasoline is gradually replacing leaded gasoline. Due to the higher octane number of isoparaffins, the small molecular weight (C 5 、C 6 ) of normal paraffins into isoparaffins to increase the octane number of light oil, which is of great significance for improving the octane number of gasoline. Isomerized oil is an environmentally friendly product with low sulfur, no aromatics and olefins, and plays an important role in the production of clean gasoline. [0003] The commonly used light hydrocarbon isomerization method is to use a zeolite-type bifunctional catalyst to carry out the hydroisomerization reaction in the range of 220-300 °C. The zeolite-type dual-function isomerizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/27C07C9/00
Inventor 张秋平濮仲英于中伟
Owner CHINA PETROLEUM & CHEM CORP
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