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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

AI Technical Summary

Problems solved by technology

In this way, it is hoped that a catalyst has multiple functions of shape-selective cracking and isomerization at the same time, and good results cannot be achieved if a single molecular sieve is used

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
Effect test

Embodiment 1

[0047] 3.4 g NaAlO 2 (Al 2 o 3 36.3%, Na 2 (22.5%) was added in the mixture of 4.1 gram NaOH and 474 gram water, stirred 4 hours, then added the sodium type ZSM-22 molecular sieve synthesized by 15 gram comparative examples, stirred 3 hours, added 66 gram pyrrolidine, stirred 1 Hour, 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 addition of ZSM-22 molecular sieve is 0.2 of the silica weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 165° C. in 4 hours, followed by hydrothermal crystallization for 72 hours. After the crystallization was completed, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neutral, and then dried at ...

Embodiment 2

[0049] Dissolve 15.4 grams of sodium hydroxide in 571 grams of water, add 193.8 grams of silica sol (30% silicon dioxide) therein, stir for 2 hours, add 15.0 grams of sodium ZSM-22 molecular sieve, and obtain A after stirring evenly. 38.3 grams of pyrrolidine was added to the solution of 5.9 grams of aluminum sulfate and 244 grams of water, and B was obtained after stirring. Add B to A, stir vigorously for 24 hours, adjust the acidity and alkalinity of the system with 15.1 g of 98% concentrated sulfuric acid, and then continue vigorously stirring 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 addition of ZSM-22 molecular sieve is 0.26 of the silica weight. Transfer the initial colloid to a 2000 ml autoclave, seal it, adjust the stirring speed to 300 rpm, start to raise the temperature, raise the temperature to 175°C in 4 hours, and hyd...

Embodiment 3

[0051] 3.48 g NaAlO 2 (Al 2 o 3 36.3%, Na 2 (2.5%) was added to the mixture of 4.9 gram NaOH and 548 gram water, stirred for 4 hours, then added the sodium type ZSM-23 molecular sieve synthesized by 15 gram of comparative example, stirred for 3 hours, added 106 gram of diethyltriamine , stirred for 1 hour, and finally added 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 addition of ZSM-23 molecular sieve is 0.19 of the silica weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 180° C. in 4 hours, followed by hydrothermal crystallization for 72 hours. After the crystallization, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neutral, and t...

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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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