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Method for producing isomerized gasoline and aromatic hydrocarbon from alkane

A technology of isomerization and alkanes, applied in chemical instruments and methods, production of liquid hydrocarbon mixtures, petroleum industry, etc., to achieve the effect of reducing separation costs and prolonging service life

Active Publication Date: 2018-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing disclosed technology, there is no method for separating bis / polymethyl isomeric hydrocarbons in isomerized products by aromatization using L molecular sieve catalysts

Method used

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  • Method for producing isomerized gasoline and aromatic hydrocarbon from alkane
  • Method for producing isomerized gasoline and aromatic hydrocarbon from alkane
  • Method for producing isomerized gasoline and aromatic hydrocarbon from alkane

Examples

Experimental program
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preparation example Construction

[0031] The preparation method of zeolite provided by the invention comprises the following steps:

[0032] (1) Mix the directing agent, inorganic base, aluminum source, silicon source and water to obtain a reaction mixture gel. In the reaction mixture gel, the molar ratio of each substance is (2.0-4.0) inorganic base: Al 2 o 3 : (5~20) SiO 2 : (60~300)H 2 O; the composition of the directing agent is (5~10)K 2 O: Al 2 o 3 : (26~40) SiO 2 : (300~600)H 2 O, the inorganic base is selected from potassium hydroxide or a mixture of potassium hydroxide and sodium hydroxide,

[0033] (2) Perform static hydrothermal crystallization of the above reaction mixture gel at 100-200°C for 10-120 hours, during which there is at least one intermittent stirring time, the intermittent stirring time is 0.1-3.0 hours, and the solid after the crystallization reaction Wash and dry.

[0034] The step (1) of the above method is the preparation of the reactant gel. During the preparation process...

example 1

[0054] Prepare Pt-Cl / Al according to CN104549376A example 1 method 2 o 3 low temperature isomerization catalyst.

[0055] (1) Preparation of alumina carrier

[0056] Take 100 grams of aluminum hydroxide powder (SB, produced by Condea, Germany, with an alumina content of 85% by mass) and an appropriate amount of deionized water to make the liquid / solid mass ratio 1:1.6, and add 2 mL of it under stirring with a volume ratio of 1: 1 of dilute nitric acid, extrusion molding, drying at 120°C for 2 hours, and calcining at 550°C for 4 hours to obtain γ-alumina carrier.

[0057] (2) Impregnated platinum

[0058] The gamma-alumina carrier prepared in step (1) is impregnated with a mixture of chloroplatinic acid, hydrochloric acid and trichloroacetic acid prepared in a predetermined amount, and the amount of platinum contained in the mixture should make the prepared catalyst reach the required The platinum content, the amount of hydrochloric acid and trichloroacetic acid are respect...

example 2

[0062] According to CN99105790.2 example 1 method to prepare zeolite type isomerization catalyst.

[0063] (1) Preparation of composite carrier

[0064] Take 100 grams of sodium mordenite with a silica / alumina molar ratio of 11.3 and 800 milliliters of 1 mol / liter NH 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, then exchange it with 800 ml of 1 mol / L hydrochloric acid at 90-95°C for 3 hours, and filter , washed with deionized water until the filtrate was neutral, and roasted at 600°C for 4 hours to prepare a hydrogen-type mordenite with a sodium content of 0.03% by mass and a silica / alumina molar ratio of 23.5.

[0065] Take 100 g of sodium Beta zeolite with a silica / alumina molar ratio of 28.6, and prepare hydrogen Beta zeolite with a sodium content of 0.03% by mass according to the above-mentioned ammonium exchange method.

[0066] Mix the above-mentioned hydro...

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Abstract

A method for producing isomerized gasoline and aromatic hydrocarbon from alkane comprises the steps as follows: light alkane is introduced into an isomerization reaction zone for an isomerization reaction, a reaction product is subjected to gas-liquid separation, a liquid-phase product enters an isohexane removal tower, C5 alkane and dimethyl C6 alkane fractions are obtained at the tower top, n-hexane and monomethyl C6 alkane fractions are distilled from the tower side, a C7+ fraction is obtained at the tower bottom, the fractions at the tower side of the isohexane removal tower and the fraction at the tower bottom are mixed to be sent to an aromatization reaction zone for an aromatization reaction, after an aromatization reaction product is subjected to gas-liquid separation, an obtainedliquid-phase product is subjected to aromatic hydrocarbon extraction, an aromatic hydrocarbon component and non-aromatic-hydrocarbon components are obtained, and the light alkane is C5-C8 alkane. Withthe adoption of the method, the octane number of a gasoline product can be increased and the proper aromatic hydrocarbon yield can be kept.

Description

technical field [0001] The present invention is a method for alkane conversion, in particular, a method for producing isomerized gasoline and aromatics from light hydrocarbons. Background technique [0002] with C 5 ~C 8 Light hydrocarbon fractions with alkanes as the main components can be used as gasoline blending components, but due to the low octane number of n-alkanes in light hydrocarbons, their blending quantity in gasoline is limited. The light hydrocarbon isomerization method can convert normal paraffins into isoparaffins, and the octane number of light hydrocarbons will be effectively increased, which can increase the blending quantity of light hydrocarbons in gasoline to a certain extent. [0003] However, since the isomerization reaction of light hydrocarbons is limited by the thermodynamic equilibrium, under specific temperature and pressure reaction conditions, the conversion rate of n-alkanes in the feedstock is certain, and the unconverted n-alkanes contrib...

Claims

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Application Information

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IPC IPC(8): C10G50/00B01J29/62B01J29/22B01J27/053
CPCB01J27/053B01J29/22B01J29/62B01J2229/18C10G50/00
Inventor 王嘉欣张玉红张大庆臧高山张秋平马爱增王涛于宁
Owner CHINA PETROLEUM & CHEM CORP
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