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Cycloalkane hydroconversion catalyst and preparation method and application thereof

A hydrogenation conversion 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 and difficult post-treatment processes, and achieve cyclohexane isomerization rate Low cost, low catalyst cost and simple preparation method

Active Publication Date: 2013-06-19
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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  • Cycloalkane hydroconversion catalyst and preparation method and application thereof
  • Cycloalkane hydroconversion catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Synthesis of Y / Beta / ZSM-12 Composite Molecular Sieve

[0030] Raw material molar ratio: 1.07Na 2 O: 8.7SiO 2 : 1.5TEABr : 0.8NH 4 OH:Al 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.

[0031] (2) Treatment of Y / Beta / ZSM-12 composite molecular sieve

[0032] Take 200 grams of Y / Beta / ZSM-12 composite molecular sieves prepared in step (1) respectively, and use 400 grams of ammonium nitrate solution with a mass concentration of 50% to exchange 3 times at 80° C. for 2 hours each time. Dry at 110°C for 6 hours, and calcined at 550°...

Embodiment 2

[0036] Get 50 grams of hydrogen-type Y / Beta / ZSM-12 composite molecular sieves prepared in Example 1, 69 grams of SB powder, and 2.50 grams of scallop powder, mix well, then add 60ml deionized water and 2.50ml 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; Appropriate amount of carrier D2, using Pt(NH 4 ) 4 Cl 2 The solution was saturated impregnated, then dried at 110° C. for 6 hours, and calcined at 500° C. for 4 hours in an air atmosphere to obtain catalyst C2. The catalyst composition and evaluation results are shown in Table 1.

Embodiment 3

[0038] Get 30 grams of hydrogen-type Y / Beta / ZSM-12 composite molecular sieves prepared in Example 1, 97 grams of SB powder, 2.50 grams of scallop powder, mix well, then add 80ml of deionized water and 2.50ml of concentrated nitric acid (66.5w%) Fully knead on a roller compactor to make it a paste-like plastic, extrude a cylindrical strip with a diameter of 1.5 mm on an extruder, dry at 110° C. for 8 hours, and then bake at 550° C. in an air atmosphere for 4 hours to obtain a catalyst carrier D3; Appropriate amount of carrier D3, using a certain Pt content of Pt(NH 4 ) 4 Cl 2 The solution was subjected to saturated impregnation, 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 cycloalkane hydroconversion catalyst and a preparation method and application thereof. The cycloalkane hydroconversion catalyst consists of a carrier and active metal Pt, the carrier consists of a hydrogen type Y / Beta / ZSM-12 composite molecular sieve and inorganic refractory oxide, the content of the hydrogen type Y / Beta / ZSM-12 composite molecular sieve in the carrier is10 to 90 percent by the weight of the catalyst carrier, and the content of the active metal Pt is 0.05 to 0.6 percent by the weight of the catalyst. The catalyst has a higher conversion rate, a higher cycloalkane ring-opening rate, a higher isomerization rate and a lower cracking rate when being used in the hydroconversion of cycloalkane-containing materials.

Description

technical field [0001] The present invention relates to a naphthene hydroconversion catalyst, its preparation method and application, in particular to a naphthene hydroconversion catalyst prepared by using a composite molecular sieve and its preparation method and application. Background technique [0002] Cetane number is an important indicator of diesel combustion performance. In diesel fractions, paraffins have the highest cetane number, naphthenes are the next, and aromatic hydrocarbons have the lowest cetane number. More and more stringent environmental regulations have put forward updated requirements on the production process of clean diesel, and the production of clean diesel with ultra-low sulfur content, low aromatic content, high cetane number and low density has become the direction of improving oil quality. [0003] Hydrodearomatization is an important technology commonly used to improve the cetane number of diesel fuel. It is a ring-opening reaction of hydroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G45/64
Inventor 贾立明秦波张喜文刘全杰徐会青王伟
Owner CHINA PETROLEUM & CHEM CORP
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