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Cyclane hydro-conversion catalyst, preparation method and applications

A hydroconversion and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as poor hydrothermal stability, difficult post-treatment processes, etc., to reduce content, reduce synthesis time, Simple preparation method

Active Publication Date: 2015-04-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Li Ruifeng and others successfully prepared Y-Beta and Beta-Y composite zeolite molecular sieve catalytic materials, and published two patents successively, CN200410012333.2 and CN200410012336.6. certain difficulty

Method used

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  • Cyclane hydro-conversion catalyst, preparation method and applications
  • Cyclane hydro-conversion catalyst, preparation method and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Synthesis of Y / Beta / ZSM-12 Composite Molecular Sieve

[0031] Raw material molar ratio: 1.07Na 2 O:8.7SiO 2 :1.5TEABr:0.8NH 4 OH :A1 2 o 3 :100H 2 O. The synthesis process is to weigh sodium hydroxide and TEABr and dissolve them in deionized water according to the above raw material ratio, then add Y-type molecular sieve while stirring, and then add concentrated ammonia water after mixing evenly, stir for half an hour, then add silica sol, and stir for 2 hours Then move to a closed stainless steel reaction kettle. Crystallization at 140° C. for 7 days to obtain a Y / Beta / ZSM-12 composite molecular sieve product.

[0032] (2) Treatment of Y / Beta / ZSM-12 composite molecular sieve

[0033] Take 200 grams of the Y / Beta / ZSM-12 composite molecular sieve prepared in step (1), and exchange it with 400 grams of ammonium nitrate solution with a mass concentration of 50% at 80° C. for 3 times, each time for 2 hours. Dry at 110°C for 6 hours, and calcined at 550°C for 4 ...

Embodiment 2

[0037] The preparation method of catalyst C2 is the same as in Example 1, except that metal Zn and Pt are co-impregnated, and the contents of Pt and Zn are different. The catalyst composition and evaluation results are shown in Table 1.

Embodiment 3

[0039] Take 50 grams of hydrogen-type Y / Beta / ZSM-12 composite molecular sieve prepared in Example 1, 69 grams of SB powder, and 2.50 grams of sage powder, mix well, then add 60ml of deionized water and 2.50ml of concentrated nitric acid (66.5wt%) Fully knead on the roller compactor to make it into a paste-like plastic, extrude a cylindrical strip with a diameter of 1.5mm on the extruder, dry at 110°C for 8 hours, and then bake at 550°C for 4 hours in an air atmosphere to obtain the catalyst carrier D2; An appropriate amount of carrier D2 was impregnated with a solution containing Zn and Pt, then dried at 110°C for 6 hours, and calcined at 500°C for 4 hours in an air atmosphere to obtain catalyst C3. The catalyst composition and evaluation results are shown in Table 1.

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Abstract

The invention discloses a cyclane hydro-conversion catalyst. The catalyst comprises carriers and active metals Pt and Zn. The carriers are composed of hydrogen-type Y / Beta / ZSM-12 composite molecular sieves and inorganic refractory oxides. In the carriers of the catalyst, by weight, the content of the hydrogen-type Y / Beta / ZSM-12 composite molecular sieves is 10wt%-90wt%, the specific surface area of the hydrogen-type Y / Beta / ZSM-12 composite molecular sieves is 600 m<2> / g-800 m<2> / g, and the pore volume is 0.30 cm<3> / g-0.40 cm<3> / g. The content of the active metal Pt of the catalyst, by weight, is 0.02%-0.04%, and the content of Zn of the catalyst, by weight, is 0.5%-15%. When used for cyclane hydro-conversion, the catalyst is advantaged by high conversion rate, high cyclane ring opening rate, high isomerization rate and low cracking rate.

Description

technical field [0001] The invention relates to a cycloalkane hydrogenation conversion catalyst and its preparation method and application, in particular to a cycloalkane hydrogenation conversion catalyst prepared by using composite molecular sieves, its preparation method and application. Background technique [0002] Cetane number is an important indicator of diesel combustion performance. In the diesel fraction, the cetane number of paraffins is the highest, followed by naphthenes, and the cetane number of aromatics is the lowest. More and more stringent environmental protection regulations require new requirements for clean diesel production processes. The production of ultra-low sulfur content, low aromatics content, high cetane number and low density clean diesel oil has become the direction to improve the quality of oil products. [0003] Hydrodearomatization is an important technology commonly used to increase the cetane number of diesel oil. It is a ring-opening re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G45/64
Inventor 贾立明徐会青刘全杰王伟
Owner CHINA PETROLEUM & CHEM CORP
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