Method for aromatizing light hydrocarbons

An aromatization, light hydrocarbon technology, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of difficult reaction, low utilization rate of light hydrocarbons, less than 20% of the total utilization rate, etc. Abrasion ability, effect of high mechanical strength

Active Publication Date: 2009-09-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the utilization rate of light hydrocarbons in my country's refinery gas is still very low, mainly for the production of alkylate oil, composite gasoline and methyl tert-butyl ether (MTBE), the total utilization rate is less than 20%, and most of them are Or burned directly as liquefied gas
However, in the process of aromatization rea...

Method used

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  • Method for aromatizing light hydrocarbons
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  • Method for aromatizing light hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Catalysts used in the present invention are prepared.

[0033] (1) Preparation of composite carrier

[0034] Get 94.6 grams of pseudo-boehmite (produced by Sasol company, SB powder, alumina content 74% by mass), under stirring, was added into 36 grams of nitric acid aqueous solution with a concentration of 1.1% by mass, stirred for 2 hours to peptize, and added 33.0 grams of HZSM-5 with a silica / alumina molar ratio of 55 Zeolite powder (wherein the zeolite content is 91% by mass), stirred at high speed for 3 hours. Drop the prepared slurry into an oil-ammonia column containing 5.0% by mass ammonia water and drop balls, dry the wet balls at 80°C for 24 hours, and bake them at 550°C for 4 hours to obtain alumina pellets with a HZSM-5 content of 30% by mass .

[0035] (2) Preparation of catalyst

[0036] Get 50 grams of alumina pellets prepared in (1) step, use 50 grams of zinc nitrate 4.7 mass %, mixed rare earth chloride 1.5 mass % (wherein lanthanum oxide accounts ...

example 2

[0039] Prepare alumina pellets containing HZSM-5 zeolite according to the method of Example 1 (1), except that the amount of HZSM-5 zeolite powder is 76.9 grams, and the obtained HZSM-5 content is 50% by mass of alumina pellets .

[0040] Get 50 grams of alumina pellets containing 50 mass % of HZSM-5 zeolite prepared by the above method, prepare catalyst B according to the method of example 1 (2) step, the difference is that the impregnation solution contains 3.0 mass % of chlorinated mixed rare earths, and obtains The specific surface area of ​​Catalyst B is 311 m 2 / g, the bulk density is 0.75 g / ml, the crushing strength is 72 N / cm, the content of zinc oxide in catalyst B is 2.0% by mass, the content of oxidized mixed rare earth is 1.0% by mass, and the content of phosphorus is 2.0% by mass.

example 3

[0044] The following examples carry out the aromatization test.

[0045] The aromatization test of Catalyst A was carried out using straight-run light naphtha as raw material. h -1 , The reaction time is 30h, and the results are shown in Table 4.

[0046] Table 1

[0047]

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Abstract

The invention discloses a method for aromatizing light hydrocarbons, which comprises the following step that: the contact reaction of C3-C12 hydrocarbons and an aromatization catalyst is performed to produce aromatic hydrocarbons and liquefied gas at a temperature of between 250 and 650 DEG C under the pressure of between 0.1 and 4.0MPa, wherein the aromatization catalyst comprises a complex carrier and compositions with the following content: 0.5 to 5.0 mass percent of ZnO, 0.1 to 5.0 mass percent of rare earth oxide, and 1.0 to 7.0 mass percent of VA group element. The complex carrier comprises 20 to 50 mass percent of ZSM series zeolite and 50 to 80 mass percent of adhesive. The method is suitable for a reaction-regeneration method of a moving bed, and has higher liquid yield and steady catalytic reaction activity.

Description

technical field [0001] The present invention relates to a kind of light hydrocarbon aromatization method, specifically, is a kind of C 3 ~C 12 A method for producing aromatic hydrocarbons and liquefied gas by aromatization of light hydrocarbons. Background technique [0002] At present, the utilization rate of light hydrocarbons in my country's refinery gas is still very low, mainly for the production of alkylate, composite gasoline and methyl tert-butyl ether (MTBE). The total utilization rate is less than 20%, and most of them are Or burned directly as liquefied gas. With the improvement of my country's oil refining and processing capacity, especially the application of heavy oil catalytic cracking technology that produces more olefins and liquefied gas, the yield of light hydrocarbons has increased year by year. Due to its high olefin content, the combustion quality is poor and it is easy to cause pollution to the environment. , and is also a great waste. At the same ti...

Claims

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Application Information

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IPC IPC(8): C07C2/00C07C6/00C10G35/095B01J29/40
Inventor 孙义兰于中伟马爱增陈春芳王子健
Owner CHINA PETROLEUM & CHEM CORP
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