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gamma-Al2O3 carrier preparation method, and alkane isomerization catalyst preparation method

An alkane isomerization and catalyst technology, which is applied in physical/chemical process catalysts, catalyst carriers, and refined hydrocarbon oils, etc., can solve the problems of affecting catalyst activity, large pore size of alumina, and wide distribution.

Active Publication Date: 2018-06-26
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above-mentioned patents, sodium salt (sodium metaaluminate) is added during the synthesis of the catalyst carrier, which seriously affects the activity of the catalyst
At the same time, most of the aluminas in the above patents are used as catalyst supports for hydrofining or hydrocracking of heavy oil products, so the pore diameters of alumina are relatively large and the distribution is relatively wide.
Not suitable as catalyst support for low temperature isomerization

Method used

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  • gamma-Al2O3 carrier preparation method, and alkane isomerization catalyst preparation method
  • gamma-Al2O3 carrier preparation method, and alkane isomerization catalyst preparation method
  • gamma-Al2O3 carrier preparation method, and alkane isomerization catalyst preparation method

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preparation example Construction

[0046] A more suitable preparation method is to volatilize the acidic alcohol solution of aluminum to generate alumina gel. Suitable acids include hydrochloric acid, sulfuric acid, nitric acid and the like, with hydrochloric acid and nitric acid being preferred. Suitable alcohols include methanol, ethanol, propanol, isopropanol, isobutanol, and the like, with ethanol and isopropanol being most preferred. Suitable aluminum precursors are aluminum chloride, aluminum nitrate, aluminum sulfate, aluminum isopropoxide and the like, most preferably aluminum nitrate and aluminum isopropoxide. The above solution is volatilized for several hours, and the selection of volatilization time should be determined according to the effect of forming a gel.

[0047] After the volatilization is completed, then wash, filter, and repeat several times to remove most of the impurity SO 4 2- (or Cl - ), Na + . The washed gel is dried at 50-150°C according to the general method. Crumble the drie...

Embodiment 1

[0052] Dissolve 8g of triblock copolymer in 200mL of ethanol, add 15mL of 67w% nitric acid, weigh 25g of aluminum isopropoxide and stir at room temperature for 5 hours or longer until completely dissolved. After the dissolution was complete, it was transferred to a blast drying oven, and the temperature was set at 80°C. Under this condition, the solvent was evaporated, and the solution turned into a yellow solid. After 48 hours, the samples were removed. Wash the alumina gel, the washing temperature is the same as the stirring temperature, and the pH is controlled to remove the impurity SO 4 2- (or Cl - ), Na + . After washing, the alumina filter cake slurry was dried at 100°C, and the solution turned into a bright yellow solid. Crumble the dried alumina dry glue through a 200-mesh sieve, add glue solution, and extrude into strips or other shapes. Transfer to a porcelain crucible, and bake at 500°C for 6h in an air atmosphere to remove the template agent. The alumina th...

Embodiment 2

[0054] The operation method is the same as that of Example 1, except that the acid added is 15 mL of 37w% hydrochloric acid, and the solution turns into a white solid after the solvent is volatilized in an air-blast drying oven at 80°C for 48 hours. γ-Al 2 o 3 Carrier B. The results are shown in Table 1.

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Abstract

The invention provides a gamma-Al2O3 carrier preparation method, and a preparation method for further preparing an alkane isomerization catalyst by using the gamma-Al2O3 carrier, wherein the gamma-Al2O3 carrier is mesoporous alumina with characteristics of large specific surface area and centralized pore size distribution. The gamma-Al2O3 carrier preparation method comprises: using a simple aluminum salt such as aluminum chloride, aluminum nitrate and the like as a raw material, synthesizing, volatilizing, washing, drying, crushing, kneading, carrying out strip extruding and molding, drying, and calcining to prepare the mesoporous alumina carrier. According to the present invention, the low temperature alkane isomerization catalyst is prepared through the reaction between the sublimed aluminum trichloride gas and the alumina carrier; and the catalyst prepared through the method has advantages of low reaction temperature, high isomerization activity, high selectivity, good repeatabilityand good activity stability.

Description

technical field [0001] The present invention relates to γ-Al 2 o 3 The preparation method of the carrier and the preparation method of the alkane isomerization catalyst. Background technique [0002] At present, in the composition of motor gasoline in my country, catalytic gasoline is the main component, accounting for about 80%, and the rest is reformed gasoline, a small amount of naphtha and MTBE. High benzene content. Along with the increasingly stringent environmental protection requirements, the pace of quality upgrading of National V, Beijing VI and future National VI motor gasoline is accelerating, and the quality specifications of motor gasoline products are getting higher and higher. Motor gasoline must be low-sulfur, Development in the direction of low olefins, low aromatics and high octane number. Therefore, it is necessary to broaden the production route of gasoline with low sulfur, low olefins and high octane number. [0003] C5 / C6 alkane isomerization techn...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J27/13B01J32/00B01J35/10C10G45/62
CPCC10G45/62B01J21/04B01J27/13B01J35/615B01J35/635B01J35/647
Inventor 李金李振兴胡长禄潘晖华吕雉韩晓琳张鹏桂鹏张上李知春崔佳龚奇菡
Owner PETROCHINA CO LTD
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