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Aromatization catalyst and clean gasoline producing process

A catalyst and aromatization technology, which is applied in refining to change the structure and skeleton of hydrocarbons, can solve the problems of weakening catalyst catalytic activity, catalyst coking, reducing octane number and restoring catalytic performance stability, etc., to achieve the benefit of molecular diffusion, Effects of reducing carbon deposits and less loss of antiknock index

Inactive Publication Date: 2006-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At high temperature, diolefins are easy to polymerize on the strong acid sites on the surface of the acidic molecular sieve catalyst, causing coking of the catalyst, weakening the catalytic activity of the catalyst, reducing the effect of octane recovery and the stability of catalytic performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] This example prepares 1.5m%NiO-0.25m%MgO / HBeta aromatization catalyst with a grain size of 70nm-150nm.

[0031] Weigh 229.6g HBeta(SiO 2 / Al 2 o 3 Molar ratio 33), 140.0g Al 2 o 3, and grind and mix them evenly, add 150ml of dilute nitric acid solution with a concentration of 3.6g / 100ml, and grind them into a powder cake with suitable humidity. Extrude into rods with a diameter of 2.0 mm on a rod extruder. After drying at room temperature, dry at 120°C for 10 hours, and bake at 520°C for 8 hours to prepare an aromatization catalyst carrier, coded as SA.

[0032] Weigh the catalyst carrier SA 100g and put it into the spray tank, and start the rotary pump. 52 ml of nickel nitrate, magnesium nitrate solution containing 1.5 g NiO and 0.25 g MgO were sprayed onto the catalyst support SA within 30 minutes. After drying at room temperature, dry at 120°C for 10 hours, and bake at 500°C for 8 hours to prepare an aromatization catalyst intermediate, numbered IA.

[0033] ...

example 2

[0036] This example prepares 3.0m%NiO-0.50m%MgO / HZSM-5 aromatization catalyst with a grain size of 100nm-500nm.

[0037] Weigh 229.6g HZSM-5 (SiO 2 / Al 2 o 3 Molar ratio 27), 140.0g Al 2 o 3 , and grind and mix them evenly, add 150ml of dilute nitric acid solution with a concentration of 5.6g / 100ml, and grind them into a powder cake with suitable humidity. Extrude into rods with a diameter of 2.0 mm on a rod extruder. After drying at room temperature, dry at 120°C for 10 hours, and bake at 520°C for 8 hours to prepare an aromatization catalyst carrier, coded as SB.

[0038] Weigh the catalyst carrier SB 100g and put it into the spray tank, and start the rotary pump. 65 ml of nickel nitrate, magnesium nitrate solution containing 3.0 g NiO and 0.50 g MgO were sprayed onto the catalyst support SB within 30 minutes. After drying at room temperature, dry at 120°C for 10 hours, and bake at 500°C for 8 hours to prepare an aromatization catalyst intermediate, coded as IB.

[0...

example 3

[0042] In this example, an aromatization catalyst of 6.0m%NiO-1.0m%MgO-0.50m%ZnO / HBeta+HZSM-5 (mass percentage of HBeta / HZSM-5: 50% / 50%) was prepared. Among them, the grain size of HBeta is 70nm-150nm; the grain size of HZSM-5 is 100nm-500nm.

[0043] Weigh 118.8g HBeta(SiO 2 / Al 2 o 3 Molar ratio 33), 106.0g HZSM-5 (SiO 2 / Al 2 o 3 Molar ratio 27), 140.0g Al 2 o 3 , and grind and mix them evenly, add 170ml of dilute nitric acid solution with a concentration of 7.6g / 100ml, and grind them into a powder cake with suitable humidity. Extrude into rods with a diameter of 2.0 mm on a rod extruder. After drying at room temperature, dry at 120°C for 10 hours, and bake at 520°C for 8 hours to prepare an aromatization catalyst carrier, coded as SC.

[0044] Weigh the catalyst carrier SC 100g and put it into the spray tank, and start the rotary pump. 57 ml of nickel nitrate, magnesium nitrate and zinc nitrate solution containing 6.0 g NiO, 1.0 g MgO and 0.50 g ZnO were sprayed ...

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Abstract

The present invention relates to an aromatization catalyst and production process of clean gasoline. Said invention adopts hydrofining and aromizing two-stage catalyst combined process to make the FCC gasoline with high sulfur content and high olefin content into clean gasoline. Said invented aromatization catalyst adopts small-grain molecular sieve catalyst, and makes the aromatization catalyst undergo the process of hydrothermal treatment and can make the strong acid quantity of said catalyst be reduced. Said invention can raise yield of gasoline, and can obtain high-quality clean gasoline product.

Description

1. Technical field [0001] The invention relates to an aromatization catalyst and process for producing clean gasoline with low sulfur content and low olefin content from fluid catalytic cracking (FCC) low-quality gasoline with high sulfur content and high olefin content. 2. Background technology [0002] With the rapid improvement of people's awareness of environmental protection, the air pollution caused by automobile exhaust has attracted more and more attention. Since the reduction of sulfur and olefin content in gasoline can reduce the restorative organic compounds (VOCs), nitrogen oxides (NO X ) and emissions of harmful substances such as sulfur dioxide. At present, major developed countries in the world limit the sulfur content of motor gasoline to less than 200 μg / g, and the olefin content to less than 30.0 (v)%. Catalytic gasoline usually accounts for a large proportion of gasoline blending, and the blending ratio of gasoline in diesel oil refineries reaches 80% to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/70
Inventor 赵乐平周勇庞宏段为宇陈玉琢
Owner CHINA PETROLEUM & CHEM CORP
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