Isomerization catalyst and preparation thereof

A catalyst and isomerization technology, used in the refining of hydrocarbon oil, petroleum industry, etc., can solve the problems of unsatisfactory anti-coking ability, aggravate cracking reaction, and small stability, and achieve the function of octane number recovery. Strong, inhibiting polymerization coking reaction, reducing the effect of carbon deposition

Inactive Publication Date: 2006-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the anti-coking ability of the acidic zeolite impregnated oxide catalyst is not ideal, and the range of improving the octane number to restore the stability of the catalyst is not large.
In addition, the increase in the amount of L acid also intensifies the cracking reaction, generating more C 3 -C 4 On the one hand, it reduces the yield of isomerized hydrocarbons, especially high-octane multi-branched isomeric hydrocarbons, and also reduces the yield of gasoline products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] In this example, nano-HBeta with a grain size of about 70nm was used to prepare the n-paraffin hydroisomerization zeolite catalyst carrier.

[0037] Weigh 229.6g nano-HBeta, 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 air drying at room temperature, it was dried at 120° C. for 10 hours and calcined at 520° C. for 8 hours to prepare an isomerization catalyst carrier. The number is NIS-1.

example 2

[0039] This example prepares 3.0m%NiO / nano HBeta n-paraffin hydroisomerization catalyst with a grain size of about 70nm

[0040] Weigh 100 g of the carrier in Example 1 and put it into the spray tank, and start the rotary pump. A solution containing 3 g of NiO, 52 ml of nickel nitrate, was sprayed onto the catalyst support within 30 minutes. After air drying at room temperature, it was dried at 120°C for 10 hours and calcined at 500°C for 8 hours to prepare a catalyst intermediate. The number is NIC-1.

[0041] Weigh 100ml of the above-mentioned catalyst intermediate and put it into a vertical catalyst activation furnace, treat it with water vapor at a water agent volume ratio of 3:1 and a temperature of 480° C. for 8 hours, and stop the water inlet. then use N 2 After displacing water vapor with 95% nitrogen-oxygen mixed gas for 4 hours, control the temperature at 30° C. / hour to cool down to room temperature, discharge, and make an isomerization catalyst. The number is NI...

example 3

[0045] In this example, the n-alkane hydroisomerization zeolite catalyst carrier was prepared by nano-HBeta with a grain size of about 110 nm.

[0046] Weigh 229.6g nano-HBeta, 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 air drying at room temperature, it was dried at 120° C. for 10 hours and calcined at 520° C. for 8 hours to prepare an isomerization catalyst carrier. The number is NIS-2.

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Abstract

A catalyst for hydroisomerization of n-alkanes with nanometer HBeta zeolite as a carrier. The nanometer HBeta grain size is 30.0nm-180.0nm. The catalyst of the invention can shorten the residence time of the carbenium ion intermediate in the pore channels of the catalyst, improve the selectivity of isomerization products, and simultaneously suppress secondary reactions such as polymerization and coking. The catalyst of the present invention adopts the preparation method of hydrothermal treatment after the metal is loaded first, which reduces the number of stronger L acid centers on the metal oxide-loaded zeolite catalyst, suppresses side reactions such as hydrogen transfer reactions dominated by stronger L acids, and reduces The amount of carbon deposited on the catalyst.

Description

1. Technical field [0001] The invention relates to an isomerization catalyst and its preparation, which is applied in a combination process of hydrogenation and upgrading of inferior catalytic cracking (FCC) gasoline. While greatly reducing the content of harmful sulfur compounds and olefin compounds in low-quality FCC gasoline, the resulting low-sulfur, low-olefin content clean gasoline has a small loss in antiknock index ((R+M) / 2). 2. Background technology [0002] With the rapid development of my country's automobile industry, the air pollution caused by automobile exhaust has attracted more and more attention. Due to the reduction of sulfur and olefin content in gasoline, CO and NO in automobile exhaust can be reduced x Therefore, the "Control Standards for Hazardous Substances in Motor Gasoline" formulated by the State Environmental Protection Administration of my country requires that the sulfur content of motor gasoline in my country is less than 800 μg / g, and the ol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/60
Inventor 赵乐平庞宏周勇段为宇张丽娟
Owner CHINA PETROLEUM & CHEM CORP
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