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A kind of cycloalkane hydrogenation catalyst and its preparation method and application

A catalyst, hydroconversion technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Effects of low isomerization rate and high cyclohexane conversion rate

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] CN101992120A discloses a cycloalkane hydrogenation conversion catalyst using Y-Beta composite molecular sieve as the catalytic material. The catalyst uses noble metal Pt as the active component, and is used for the hydrogenation conversion of various raw materials containing naphthenes, and has higher conversion rate, ring-opening rate of naphthenes, and low cracking rate, but the content of active component platinum in the catalyst needs to be further reduced

Method used

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  • A kind of cycloalkane hydrogenation catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Synthesis of Y-Beta composite molecular sieve

[0031] In the first step, add 12.5g Y molecular sieve to a solution of 0.65g sodium hydroxide, 10.8g TEABr (tetraethylammonium bromide), and 4.0mL concentrated ammonia water (25% by weight), and stir for 0.5 hours to mix well.

[0032]In the second step, 10.0 mL of silica sol (SiO 2 30% by weight) and 41 mL of distilled water were added to the above solution and stirred for 1 hour.

[0033] 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.

[0034] (2) Treatment of Y-Beta composite molecular sieve

[0035] Take 200 grams of Y-Beta composite molecular sieves prepared in step (1), and exchange them with 400 grams of 50% ammonium nitrate...

Embodiment 2

[0039] The preparation method of catalyst C2 is the same as in Example 1, except that metal Zn and Pt are co-impregnated, and the content of Zn is different. The catalyst composition and evaluation results are shown in Table 1.

Embodiment 3

[0041] Take 50 grams of hydrogen-type Y-Beta composite molecular sieve 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, It 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 hydrogenation conversion catalyst for naphthenic hydrocarbon. The catalyst comprises a carrier and active metal Pt and Zn, wherein the carrier comprises hydrogen type Y-Beta composite molecular sieve and inorganic refractory oxide. The hydrogen type Y-Beta composite molecular sieve accounts for 10-90 wt% of the catalyst carrier (calculated by the weight of the catalyst carrier), and has specific surface area of 500-700 m<2> / g, and pore volume of 0.25-0.45 cm<3> / g. The active metal Pt accounts for 0.02-0.4 wt% of the catalyst (calculated by the weight of the catalyst); and the Zn accounts for 0.5-15% of the catalyst (calculated by the weight of the catalyst). The catalyst has low content of noble metal, and shows high conversion rate, high ring opening rate of naphthenic hydrocarbon, high isomerization rate and low cracking rate for hydrogenation conversion of naphthenic hydrocarbon.

Description

technical field [0001] The invention relates to a cycloalkane hydrogenation catalyst and its preparation method and application, in particular to a naphthene 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 reaction that o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G45/64C07C5/13
Inventor 贾立明徐会青刘全杰王伟
Owner CHINA PETROLEUM & CHEM CORP
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