Preparation method of paraffin hydrocarbon shape-selective isomerization catalyst

A catalyst and isomerization technology, which is applied in the field of preparation of paraffin-selective isomerization catalysts, can solve the problems of unsatisfactory position of hydrogenation active components, unreasonable pore structure of catalyst, unsatisfactory catalyst activity and selectivity, etc. , to improve the activity and selectivity, ensure the addition/dehydrogenation rate, and improve the diffusion rate.

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unreasonable pore structure of the catalyst and the unsatisfactory location of the hydrogenation active components, the acid function and hydrogenation function of the catalyst cannot be well matched, resulting in unsatisfactory activity and selectivity of the catalyst in the isomerization reaction

Method used

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  • Preparation method of paraffin hydrocarbon shape-selective isomerization catalyst
  • Preparation method of paraffin hydrocarbon shape-selective isomerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve chloroplatinic acid containing 0.3 grams of platinum in 6 grams of water, fully mix 10 grams of 200-mesh cellulose with the above solution, and dry the mixture at 80°C for 6 hours to obtain platinum-loaded cellulose;

[0027] (2) 45 grams of ZSM-23 molecular sieve (particle size 0.5 microns, SiO 2 / Al 2 o 3 The molar ratio is 35), 72 grams of aluminum hydroxide (i.e. SB produced by Germany Condean company, dry basis 76%), the platinum-loaded cellulose prepared in step (1), 50 ml of 0.2 M nitric acid solution and 30 ml of water Kneading to make it into a paste-like plastic, forming a cylindrical strip with a diameter of 1.5mm on an extruder, drying the cylindrical strip at 110°C for 8 hours, and then calcining at 650°C for 4 hours in an air atmosphere to obtain a catalyst. The catalyst is composed of Pt: 0.3%, ZSM-32: 45%, pore-forming agent: 10%, alumina: the balance. The pore volume of the catalyst with a pore diameter of 1-10nm accounts for 7.4% of the...

Embodiment 2

[0030] Same as Example 1, the difference is that the substance content is adjusted in each step, SSZ-32 molecular sieve (particle size is 0.7 micron, SiO 2 / Al 2 o 3 The molar ratio is 25) to replace the ZSM-23 molecular sieve, and the catalyst composition is obtained as Pt: 0.02%, SSZ-32: 30%, pore-forming agent: 10%, and alumina: the balance. See Table 2 for the evaluation results.

Embodiment 3

[0032] Same as Example 1, the difference is that the substance content in each step is adjusted, silica gel replaces aluminum hydroxide, and the catalyst composition is obtained as Pt: 0.02%, ZSM-23: 35%, pore-forming agent: 10%, silicon oxide: margin. See Table 2 for the evaluation results.

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Abstract

The invention discloses a preparation method of a paraffin hydrocarbon shape-selective isomerization catalyst. The method includes the following steps: (1) supporting an active component onto a macro-pore forming agent, drying the macro-pore forming agent to obtain a modified pore forming agent; (2) performing mix-kneading moulding to MTT micro-crystal-grain molecular sieve, a precursor of a melt-resistant oxide, the modified pore forming agent, a peptizer and water, and drying and roasting the mixture to prepare the catalyst. The preparation method is simple in processes and low in cost. The catalyst, when being used in a paraffin hydrocarbon shape-selective isomerization reaction, has high target product yield and low pour point.

Description

technical field [0001] The invention relates to a preparation method of a paraffin hydrocarbon type-selective isomerization catalyst. The isomerization dewaxing catalyst is used in the isomerization dewaxing process of waxy raw material oil, and is especially suitable for the process of producing high-grade lubricating oil base oil. Background technique [0002] Waxy raw oils, especially heavy distillate oils derived from paraffin-based crude oils, contain more waxes, have higher freezing points, and poor low-temperature fluidity. During storage, transportation, and use, the oil will Thickening, even solidification, thereby blocking the oil pipeline and interrupting the oil supply to the engine to cause engine failure. At present, there are many methods to solve various problems caused by solidification of waxy heavy distillate oil, and the main method is dewaxing, including solvent dewaxing, catalytic dewaxing and isomerization dewaxing. [0003] Solvent dewaxing is to us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74B01J35/10C10G45/64C10M177/00
Inventor 王俊英刘春阳刘淑鹤郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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