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Method for conveying C<+>9 heavy aromatics to light aromatics

A technology for heavy aromatics and lightening, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve problems such as high reaction temperature and pressure, low space velocity, and industrial application restrictions, and achieve the reduction of colloids content, reducing the final boiling point, and the effect of high conversion rate of heavy aromatics

Active Publication Date: 2009-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main methods for lightening heavy aromatics are pyrolysis and catalytic dealkylation. The speed is low, so that the industrial application of the technology is limited

Method used

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  • Method for conveying C&lt;+&gt;9 heavy aromatics to light aromatics
  • Method for conveying C&lt;+&gt;9 heavy aromatics to light aromatics

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the catalyst of the invention comprises the steps of impregnating the molded high-temperature-resistant inorganic oxide with a solution containing an iridium compound, and performing water chlorine activation and reduction after drying.

[0020] The molding of the high temperature-resistant inorganic oxide can adopt conventional extrusion molding or drop ball molding.

[0021] The extrusion molding method is to knead the powdery high-temperature-resistant inorganic oxide or its precursor with an appropriate amount of water and a peptizer. The peptizer is generally an acid. Extrude the uniformly kneaded material, dry and roast to obtain the shaped carrier.

[0022] The method for forming the drop ball is: adding an appropriate amount of water to the powdery high-temperature-resistant inorganic oxide or its precursor, so that the liquid / solid mass ratio is 1.0-3.0. Stir to make it slurry, then add acid to acidify, add urea accounting for 20-40% ...

example 1

[0032] Preparation of the catalyst of the present invention.

[0033] (1) Preparation of γ-alumina carrier.

[0034] Take 100 grams of aluminum hydroxide powder (produced by German condea company, brand SB) and add 200 grams of deionized water, and stir to make it slurry. Add the nitric acid that volume ratio is 1: 1 by the amount of every 100 grams of SB powder 7.5 milliliters, add the concentration of 30 grams of urea and 10.0 grams simultaneously and be the hydrochloric acid solution of 36.5 mass %, stir 1 hour, add 30 grams of kerosene and stir 1 hour, The drop ball is formed in the oil ammonia column. The wet bulb was solidified in ammonia water with a concentration of 6.0% by mass for 1 hour, then filtered, washed 2 to 3 times with deionized water, dried at 60°C for 6 hours, and dried at 120°C for 10 hours, and then dried in dry air at a ratio of 700:1 The gas / solid volume ratio was calcined at 600° C. for 4 hours to obtain the gamma-alumina carrier.

[0035] (2) Prep...

example 2

[0038] Catalyst B was prepared according to the method of Example 1, except that the impregnating liquid used contained 0.3% by mass of Ir, and the active component content of catalyst B was shown in Table 1.

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Abstract

The invention provides a method for lightening heavy aromatic hydrocarbon C9<+>; the method comprises that the heavy aromatic hydrocarbon C9<+> is lightened by contacting and taking react with catalysts under the hydrogen with the temperature of 380 to 600 DEG C and the pressure of 0.1 to 5.0MPa. The catalysts comprise high temperature resistance inorganic oxide carriers, and 0.01 to 3.0 percent of halogen and 0.01 to 5.0 percent of iridium by mass percentage by taking carriers as calculation standards. The method is used for lightening heavy aromatic hydrocarbon C9<+>, and is characterized by high light conversion, high yield of dimethyl benzene, little carbon deposition of catalysts and effectively reducing the end boiling point and gum content of the heavy aromatic hydrocarbon.

Description

technical field [0001] The invention relates to a method for lightening heavy aromatic hydrocarbons. Specifically, a C 9 The method for producing benzene, toluene and xylene by lightening heavy aromatics above. Background technique [0002] Heavy aromatics generally refer to the C contained in oil produced by catalytic reforming, disproportionation and isomerization reactions and ethylene cracking hydrogenated gasoline. 9 ~C 16 mono- or bicycloalkylaromatics. For a long time, heavy aromatic resources have not been rationally and fully utilized, except for a small amount used as solvent and extraction of C 9 、C 10 Except for monomeric aromatics, they are generally directly blended into gasoline pools as fuel. However, it is not advisable to directly use heavy aromatics as fuels from both economic and environmental point of view. On the one hand, heavy aromatics can be converted into light aromatics such as benzene, toluene, and xylene (BTX); on the other hand, from the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/02C07C4/18B01J27/13
Inventor 蔡迎春马爱增潘锦程
Owner CHINA PETROLEUM & CHEM CORP
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