Modifying method for naphtha and light hydrocarbon aromatization

A naphtha and aromatization technology is used in the production of aromatic hydrocarbons or clean gasoline components, and the production of high-quality liquefied gas. The effect of increased operational flexibility

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aromatization reaction can be carried out in moving bed, fluidized bed or fixed bed, but no specific catalyst regeneration method is given

Method used

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  • Modifying method for naphtha and light hydrocarbon aromatization
  • Modifying method for naphtha and light hydrocarbon aromatization
  • Modifying method for naphtha and light hydrocarbon aromatization

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0061] (1) Preparation of composite carrier

[0062] Get 67.6 kilograms of pseudo-boehmite powder (production of Sasol company, Aluminum oxide content 74 mass %), under stirring condition, join 300 kilograms concentration in the nitric acid aqueous solution of 1.1 mass %, after stirring for 2 hours peptization, add 55.0 kilograms of silica / alumina molar ratio is the HZSM-5 zeolite of 60 powder (91% zeolite content), stirred at high speed for 3 hours. Drop the prepared slurry into an oily ammonia column containing 8% by mass of ammonia water, take out the wet bulb formed in the oily ammonia column, dry at 60°C for 10 hours, and roast at 550°C for 3 hours to obtain a composite carrier, which is a composite carrier containing HZSM- 5 zeolite 50% by mass alumina pellets.

[0063] (2) Preparation of catalyst

[0064] Get 50 kilograms of composite carriers, use 50 kilograms containing 4.7 mass % of zinc nitrate, 3.0 mass % of mixed rare earth chloride (wherein lanthanum oxide ac...

example 2

[0067] according to figure 1The technological process shown, uses catalyst A, carries out the aromatization reaction test with the straight-run naphtha shown in 60 mass % table 1 and the light hydrocarbon shown in 40 mass % table 2 as raw material, reacts in the cycle of hydrogen-containing gas Under conditions, the content of hydrogen in the hydrogen-containing gas is 21.4% by volume, and the volume ratio of hydrogen to naphtha is 150. Control the raw material inlet temperature of each reactor to be 400°C, the reaction pressure to be 0.5MPa, and the mass space velocity of raw material feed to be 0.5h -1 . The light hydrocarbons are equally divided into two streams, one stream is mixed with straight-run naphtha and enters the first reactor 108 through the heating furnace 106, and the other stream of light hydrocarbons directly enters the second reactor 111 in the form of cold material. The pressure of the regenerator is 0.7MPa, the inlet temperature of regeneration gas in th...

example 3

[0069] according to figure 2 The technological process shown, uses catalyst A, carries out the aromatization reaction test with the straight-run naphtha shown in 60 mass % table 1 and the light hydrocarbon shown in 40 mass % table 2 as raw material, reacts in the cycle of hydrogen-containing gas Under conditions, the content of hydrogen in the hydrogen-containing gas is 22.0% by volume, and the volume ratio of hydrogen to naphtha is 150. The operating conditions of the reaction part and the regenerator, the residence time of the ungenerated catalyst in the coking zone, the temperature of the drying zone and the cooling zone are all the same as in Example 2, the difference is that the regeneration gas enters the two-stage coking zone from the middle, and the test results are shown in table 3.

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Abstract

A modifying method for naphtha and light hydrocarbon aromatization comprises: contacting naphtha and C3-C5 light hydrocarbon with aromatization catalyst in the presence of hydrogen-containing gas to carry out aromatization modifying reaction, wherein the reaction temperature is 250-600 DEG C, and the volume ratio of hydrogen to naphtha is 20-400. The method can convert naphtha with low octane value and low-carbon hydrocarbon into gasoline component with high octane value and excellent liquefied gas, the final distilling point of liquid product and the carbon-accumulating speed of catalyst areobviously reduced, and the service life of catalyst is prolonged.

Description

technical field [0001] The invention is a light hydrocarbon aromatization upgrading method, in particular, a method of using low-octane naphtha and C 3 ~C 5 The mixture of light hydrocarbons is used as raw material to produce aromatic hydrocarbons or clean gasoline components, and a method for producing high-quality liquefied gas. Background technique [0002] With the introduction of unleaded gasoline and new gasoline standards, some low-octane gasoline, such as reformed top oil, condensate, partially hydrocoked gasoline and straight-run gasoline, need to find suitable processing technology. Although this part of naphtha is suitable as ethylene raw material, it is difficult to transport because of its high vapor pressure. If there is no ethylene plant near the enterprise, it is difficult to be used as ethylene raw material. At present, catalytic reforming is the main device used by refineries to produce aromatics and high-octane clean gasoline blending components. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/04C10G35/12
Inventor 王杰广马爱增任坚强于中伟张新宽
Owner CHINA PETROLEUM & CHEM CORP
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