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Naphthenic hydrocarbon hydro-conversion catalyst and preparation method and application thereof

A hydrogenation conversion and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of difficult post-treatment process and poor hydrothermal stability, and achieve low catalyst cost and cyclohexane Effect of low isomerization rate and high cyclohexane conversion rate

Active Publication Date: 2013-01-09
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, patent application numbers: CN200410012333.2 and CN200410012336.6, but due to poor hydrothermal stability, post-treatment The craft poses certain difficulties

Method used

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  • Naphthenic hydrocarbon hydro-conversion catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of Y-Beta Composite Molecular Sieve

[0027] In the first step, 12.5g Y molecular sieves are added to a solution of 0.65g sodium hydroxide, 10.8g TEABr (tetraethylammonium bromide), and 4.0ml concentrated ammonia water (25% by weight), and stirred for 0.5 hours to mix well.

[0028] In the second step, 10.0ml silica sol (SiO 2 30% by weight) and 41ml of distilled water were added to the above solution and stirred for 1 hour.

[0029] The third step is to put the above-mentioned white jelly into a 150ml stainless steel reaction kettle, crystallize at 140°C for 90 hours, take it out, wash until the solution is neutral, and then dry it. The prepared samples were calcined at 550°C for 4h to remove the templating agent. Obtain Y-Beta composite zeolite molecular sieve.

[0030] (2) Treatment of Y-Beta composite molecular sieve

[0031] Take 200 grams of Y-Beta composite molecular sieves prepared in step (1) respectively, and exchange 3 times at 80° C. for 2 ...

Embodiment 2

[0035] Get 50 grams of hydrogen-type Y-Beta composite molecular sieves prepared in Example 1, 69 grams of SB powder, and 2.50 grams of scallop powder, mix well, then add 60ml of deionized water and 2.50ml of concentrated nitric acid (66.5w%) on the roller compactor Fully knead 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 in an air atmosphere for 4 hours to obtain the catalyst carrier D2; take an appropriate amount of carrier D2, Use a certain Pt content of 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

[0037] Get 30 grams of hydrogen-type Y-Beta composite molecular sieves prepared in Example 1, 97 grams of SB powder, and 2.50 grams of scallop powder, mix well, then add 80ml of deionized water and 2.50ml of concentrated nitric acid (66.5w%) on a roller compactor Fully knead to make it into a paste-like plastic, extrude a cylindrical strip with a diameter of 1.5mm on the extruder, dry it at 110°C for 8 hours, and then roast it in an air atmosphere at 550°C for 4 hours to obtain the catalyst carrier D3; take an appropriate amount of carrier D3, Use 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 naphthenic hydrocarbon hydro-conversion catalyst and a preparation method and application thereof. The naphthenic hydrocarbon hydro-conversion catalyst comprises a carrier active metal Pt, wherein a carrier consists of 10 to 90 weight percent of hydrogen-type Y-Beta composite molecular sieve, and an inorganic refractory oxide; and the active metal Pt content of the catalyst is 0.05 to 0.6 percent. The catalyst is prepared by an immersion method; and the obtained catalyst can be applied to hydro-conversion of various naphthenic hydrocarbon-containing raw materials andhas high conversion rate, high naphthenic hydrocarbon ring opening 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): B01J29/80B01J29/74B01J29/12B01J37/02C07C5/13C10G45/64
Inventor 贾立明秦波张喜文刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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