Hydro-isomerization catalyst for paraffine, and its preparing method and application

A hydrogen isomerization and catalyst technology, which is applied in the direction of catalyst activation/preparation, isomerization to hydrocarbons, physical/chemical process catalysts, etc., can solve the problems of ineffectiveness and other problems

Inactive Publication Date: 2006-06-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, it is hoped that a catalyst has multiple functions of shape-selective cracking and iso

Method used

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  • Hydro-isomerization catalyst for paraffine, and its preparing method and application
  • Hydro-isomerization catalyst for paraffine, and its preparing method and application

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0046] Example 1

[0047] 3.4 g NaAlO 2 (Al 2 O 3 36.3%, Na 2 O32.5%) was added to the mixture of 4.1 g of NaOH and 474 g of water, stirred for 4 hours, then 15 g of sodium ZSM-22 molecular sieve synthesized in the comparative example was added, stirred for 3 hours, 66 g of pyrrolidine was added, and stirred for 1 Hours, finally add 261.1 grams of 30% silica sol to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 O 3 =109, R / SiO 2 =0.7, OH - / SiO 2 =0.08, H 2 O / SiO 2 = 25, the added amount of ZSM-22 molecular sieve is 0.2 of the weight of silica. After stirring for 12 hours, it was transferred to a 1000 ml autoclave. After sealing, the stirring speed was adjusted to 300 rpm, the temperature was started, and the temperature was raised to 165° C. in 4 hours and hydrothermal crystallization was performed for 72 hours. After the completion of crystallization, the autoclave is placed in water for rapid cooling, the product is filtered and washed ...

Example Embodiment

[0048] Example 2

[0049] 15.4 g of sodium hydroxide was dissolved in 571 g of water, 193.8 g of silica sol (30% silica) was added to it, stirred for 2 hours, 15.0 g of sodium type ZSM-22 molecular sieve was added, and A was obtained after uniform stirring. 38.3 g of pyrrolidine was added to a solution of 5.9 g of aluminum sulfate and 244 g of water, and B was obtained after uniform stirring. Add B to A, stir vigorously for 24 hours, adjust the pH of the system with 15.1 g of 98% concentrated sulfuric acid, and then continue to vigorously stir for 12 hours to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 O 3 =109, R / SiO 2 =0.56, OH - / SiO 2 =0.08, Na / SiO 2 = 0.4, H 2 O / SiO 2=55, the added amount of ZSM-22 molecular sieve is 0.26 of the weight of silica. The initial colloid was transferred to a 2000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 revolutions per minute, and the temperature was started, and the tempe...

Example Embodiment

[0050] Example 3

[0051] 3.48 g NaAlO 2 (Al 2 O 3 36.3%, Na 2 O32.5%) was added to the mixture of 4.9 grams of NaOH and 548 grams of water, stirred for 4 hours, then 15 grams of sodium ZSM-23 molecular sieve synthesized in the comparative example was added, stirred for 3 hours, and 106 grams of diethyltriamine was added. , Stir for 1 hour, and finally add 270 grams of 30% silica sol to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 O 3 =117, R / SiO 2 = 0.8, OH - / SiO 2 =0.1, H 2 O / SiO 2 = 30, the added amount of ZSM-23 molecular sieve is 0.19 of the weight of silica. After stirring for 12 hours, it was transferred to a 1000 ml autoclave. After sealing, the stirring speed was adjusted to 300 rpm, the temperature was started, and the temperature was raised to 180° C. in 4 hours, and hydrothermal crystallization was performed for 72 hours. After the completion of crystallization, the autoclave is placed in water for rapid cooling, the product...

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Abstract

A catalyst for the hydroisomerizing reaction of paraffin is composed of the active component (0.05-5.0 Wt%) chosen from Pt, Pd and Ir, and the composite molecular sieve ZSM-22/ZSM-23 (or ZSM-23/ZSM-22). It has high catalytic activity and selectivity.

Description

technical field [0001] The invention relates to a catalyst for alkane hydroisomerization. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] The isomerization reaction of n-alkanes is an important reaction in petroleum processing, such as the isomerization dewaxing process of lubricating oil and the isomerization pour point depressing process of diesel oil. [0005] N-paraffins are undesirable components in lube oil fractions, resulting in high pour points, low viscosity indices and poor low temperature properties. To improve these properties, it is necessary to remove all or part of the high melting point n-alkanes. At present, the commonly used dewaxing methods mainly include solvent dewaxing, catalytic dewaxing and isomeric dewaxing. [0006] Solvent dewaxing is to use the solubility of wax in solvent to remove...

Claims

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Application Information

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IPC IPC(8): B01J29/068B01J37/02C01B39/04C07C5/27
Inventor 王炳春田志坚胡胜徐云鹏徐竹生林励吾
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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