Diesel fuel fraction depth desulfurization and dearomatization catalyst and prep. thereof

A diesel desulfurization and catalyst technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of large molecular sieve damage, low diesel oil yield, and decreased crystallinity of molecular sieves, and achieve high cetane number, low sulfur and nitrogen content, good stability effect

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because hydrogen-type molecular sieves have more acid sites, stronger acidity, and widely distributed acid sites, some acid sites distributed on the outer surface of molecular sieves have no selectivity. Small molecule, low yield of diesel oil, in order to solve this problem, people carry out further treatment to Y-type molecular sieve, mainly carry out means such as chemical dealumination, water vapor dealumination and introduction of auxiliary components, etc. The Y-type molecular sieve is treated by chemical methods such as dealumination, slurrying with some compounds and exchange with a...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The following examples will further illustrate the preparation process and technical points of the catalyst of the present invention, but it should not be considered that the present invention is limited to the following examples. Embodiment 1 A kind of modification method of Y type molecular sieve

[0026] (1) Get 200g NaY molecular sieve (SiO 2 / Al 2 o 3 =5.1, Na 2 (O: 10w%, unit cell parameter 2.466nm) was added to a beaker containing 1500ml of 15w% ammonium nitrate solution, stirred at 90°C for 1h, and repeated once. The solid matter was dried at 110°C for 10h, and roasted at 550°C for 4h to obtain the hydrogen form Molecular sieve, which contains 0.28w% Na 2 O (based on molecular sieve mass), denoted as Ya1.

[0027] (2) Take 200g of molecular sieve Ya1, add it to a beaker containing 1200ml of 0.20M hydrochloric acid solution, stir at 60°C for 2h, wash with distilled water until neutral, dry at 130°C for 4h, and the obtained molecular sieve is designated as Yb...

Embodiment 2

[0028] (3) Take 100g molecular sieve Yb1, add it into a round bottom flask containing 1000ml anhydrous tetrahydrofuran solution containing 2w% ethyl orthosilicate, heat and reflux for 3h under stirring, filter out solid matter, wash with absolute ethanol, Then wash with distilled water, dry at 110°C for 8h, and roast at 480°C for 8h to obtain a modified Y-type molecular sieve, denoted as Yc1, loaded with SiO 2 It is 1.2w% (based on molecular sieve mass), and its main properties are shown in Table 1. Embodiment 2 A kind of modification method of Y type molecular sieve

[0029] (1) Get 200g NaY molecular sieve (SiO 2 / Al 2 o 3 =5.1, Na 2 (O: 10w%, unit cell parameter 2.466nm) was added to a beaker containing 1500ml of 10w% ammonium sulfate solution, stirred at 60°C for 4h, and the operation was repeated twice, the solid matter was dried at 160°C for 2h, and roasted at 480°C for 8h to obtain the hydrogen form Molecular sieve, which contains 0.33w% Na 2 O (based on molecular...

Embodiment 3

[0031] (3) Take 100g of molecular sieve Yb2, add it into a round bottom flask containing 700ml of anhydrous toluene solution containing 5w% of 3-aminopropyltriethoxysilane, stir at 80°C for 6h, filter out the solid matter, and use acetone Wash, then wash with distilled water, dry at 130°C for 5h, and roast at 560°C for 4h to obtain a modified Y-type molecular sieve, denoted as Yc2, loaded with SiO 2 It is 2.1w% (based on the molecular sieve mass), and the main properties are shown in Table 1. Embodiment 3 A kind of modification method of Y type molecular sieve

[0032] (1) Get 200g NaY molecular sieve (SiO 2 / Al 2 o 3 =5.1, Na 2 (O: 10w%, unit cell parameter 2.466nm) is added in the beaker that the ammonium chloride solution of 500ml 20w% is housed, is stirred at normal temperature for 4h, repeats twice, solid matter 110 ℃ of drying 6h, 580 ℃ of roasting 3h obtains Molecular sieve of hydrogen type, which contains 0.40w% Na 2 O (based on molecular sieve mass), denoted as ...

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Abstract

The present invention is one kind of catalyst for producing low-sulfur and low-arene clean diesel oil and its preparation. The catalyst has modified Y-type molecular sieve as its acid component, andthe modification process of the molecular sieve is to make siliceous organic matter with relatively large dynamic diameter contact with the molecular sieve and combine with acid centers on the surface of the molecular sieve while maintaining the acid centers inside the molecular sieve pore passages of the molecular sieve under certain conditions. The catalyst is used in producing low-sulfur and low-arene clean diesel oil and has the advantages of high diesel oil yield, high cetane number of diesel oil product, low sulfur, nitrogen and arene content in diesel oil, etc.

Description

1. Technical field [0001] The invention discloses a desulfurization and dearomatization catalyst for producing clean diesel oil and a preparation method thereof. Specifically, it is a deep desulfurization and dearomatization catalyst containing modified Y zeolite and a preparation method thereof. 2. Background technology [0002] In order to meet the requirements of product quality and environmental protection regulations, petroleum products must be refined before sale to remove harmful substances. Current environmental protection regulations have put forward stricter standards for sulfur, aromatics content and cetane number in diesel, although Now the removal of sulfur in diesel fractions is quite mature, and a variety of catalysts with excellent performance have been introduced, but the aromatic hydrocarbon saturation capacity of these catalysts is very low. Generally speaking, aromatic hydrocarbon saturation is more difficult than sulfur removal, and aromatic hydrocarbon ...

Claims

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Application Information

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IPC IPC(8): C10G45/12
Inventor 刘全杰杨军彭焱王伟
Owner CHINA PETROLEUM & CHEM CORP
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