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Alkane hydroisomerization catalyst and preparation method and application thereof

A hydrogen isomerization and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of shallow isomerization, high cracking rate, and insufficient activity, and achieve deep isomerization , High conversion activity, low selectivity for cleavage activity

Active Publication Date: 2013-08-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also the following major disadvantages: Friedel and Kraft type catalysts, as well as platinum catalysts on chlorinated alumina, require expensive reactors made of special alloys due to their corrosive nature
[0019] When the above-mentioned existing catalysts are used in the isomerization reaction of n-paraffins, they generally have one or more deficiencies such as insufficient activity, high cracking rate, and shallow isomerization degree.

Method used

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  • Alkane hydroisomerization catalyst and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Tetraethylammonium hydroxide (TEAOH) is used as template, and the raw materials are borax, sodium hydroxide and silica gel.

[0057] The molar ratio of feeding is:

[0058] SiO 2 / B 2 o 3 =30;TEAOH / B 2 o 3 =3.6; Al 2 o 3 / B 2 o 3 =0

[0059] Na 2 O / B 2 o 3 = 2; H 2 O / B 2 o 3 =200.

[0060] The first stage reaction conditions: 120°C, time: 20 hours

[0061] Second stage reaction conditions: 140°C, time: 40 hours

[0062] The third stage reaction condition: 180°C, time: 8 hours.

[0063] The synthetic sample is B-beta sample A.

Embodiment 2

[0065] Tetraethylammonium hydroxide (TEAOH) is used as a template, and the raw materials are boric acid, sodium hydroxide and water glass.

[0066] The molar ratio of feeding is:

[0067] SiO 2 / B 2 o 3 =55;TEAOH / B 2 o 3 =1.8; Al 2 o 3 / B 2 o 3 =0.5

[0068] Na 2 O / B 2 o 3 =12;H 2 O / B 2 o 3 =400.

[0069] The first stage reaction conditions: 140°C, time: 30 hours

[0070] Second stage reaction conditions: 150°C, time: 48 hours

[0071] The reaction condition of the third stage: 180°C, the time: 20 hours.

[0072] The main properties of the products obtained are listed in Table 1.

[0073] The B-beta sample B was obtained.

[0074] Table 1 Main physicochemical properties of B-β products

[0075] sample

Embodiment 3

[0077] The invention synthesizes modified B-beta zeolite C. Take 2000ml of A sample slurry, containing 400g of solid phase (on a dry basis), dilute the solid-liquid volume ratio to 1:10 with clean water, then add ammonium nitrate to make the concentration of ammonium nitrate in the solution 2.0M, stir, and heat up to 90 Stir at ~95°C for 2 hours at a constant temperature, then cool down to 50°C for filtration, and perform a second exchange of the wet filter cake under the same conditions as the first. The B-beta zeolite that has been exchanged twice with ammonium salts is washed until the pH reaches 5-6, and then placed in a drying oven and dried at 110-120° C. for 6 hours (dry basis is 88% by weight). The dried B-β zeolite is placed in a muffle furnace and rapidly raised to 250°C, kept at a constant temperature for 2 hours, then rapidly raised to 400°C, kept at a constant temperature for 4 hours, and finally raised to 540°C, kept at a constant temperature for 10 hours. After...

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Abstract

The invention discloses an alkane hydroisomerization catalyst and a preparation method and application thereof. The catalyst consists of 5 to 60 percent of modified B-Beta zeolite, 20 to 70 percent of macroporous inorganic refractory oxide, 0 to 30 percent of microporous alumina and 0.05 to 1 percent of group VIII metal Pt or Pd as a hydrogenation component or 0.1 to 10 percent of group VIII metal Ni as a hydrogenation component; and the properties of the modified B-Beta zeolite are as follows: the molar ratio of SiO2 to B2O3 is 20 to 150, the secondary pore volume which is greater than 2nm accounts for more than 40 percent of the total pore volume, the specific surface is 500m2 / g to 750m2 / g, the infrared acidity is 0.05mmol / g to 0.50mmol / g, and the content of Na2O is less than 0.2 percent by weight. Compared with the prior art, the catalyst has the advantage of good comprehensive properties in terms of activity, crackability, isomerization degree and the like.

Description

technical field [0001] The present invention relates to a catalyst for alkane hydroisomerization reaction and its preparation method and application, in particular to a kind of alkane hydroisomerization composed of Group VIII noble metal and oxides with BEA molecular sieve structure Catalyst. Background technique [0002] With the rapid development of the machinery industry, the quality requirements for oil products (gasoline, diesel, lubricating oil) are getting higher and higher. In order to improve the properties of the oil, the n-alkanes, especially the long-chain n-alkanes, must be removed as much as possible. For gasoline, converting linear alkanes or less branched alkanes to multi-branched alkanes can significantly increase its octane number; for diesel and lubricating oil, converting linear alkanes to branched alkanes can reduce its condensation. point or pour point to improve its low temperature performance. As far as lubricating oil is concerned, the emergence o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70B01J29/74B01J29/72B01J37/00C10G45/64
Inventor 谷明镝
Owner CHINA PETROLEUM & CHEM CORP