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Method for producing chemical raw material by hydrocracking

A chemical raw material, hydrocracking technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrocarbon oil cracking, etc., can solve the problems of not being able to play the role of additives on the catalyst well, and the influence is very limited, to achieve Conducive to entry and exit and diffusion, reduce strong adsorption, improve nitrogen resistance and activity stability

Active Publication Date: 2014-11-19
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the additive components are first deposited on the selected matrix material, and then mixed with zeolite, the introduction of these additives mainly affects the properties of the matrix material, but has a limited impact on the properties of the zeolite, so it cannot be used well. The effect of the agent on the catalyst

Method used

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  • Method for producing chemical raw material by hydrocracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of embodiment 1 NiW / HY-β-ASA catalyst

[0026] Amorphous silica-alumina (ASA) was prepared according to the above comparative example. The composite carrier HY-β-ASA was prepared by mechanically mixing ASA, HY molecular sieve and β molecular sieve. The mass contents of ASA, Y molecular sieve and β molecular sieve in the composite carrier were 70%, 24% and 6% respectively. Weigh 1.35g of nickel nitrate and 3.71g of ammonium metatungstate and dissolve in deionized water to make a co-impregnation solution, impregnate the composite carrier for 4 hours, dry in air at 120°C for 4 hours, and then bake in a muffle furnace at 500°C for 3 hours. Obtain catalyzer, metal content NiO is 4wt%, WO in the catalyzer 3 It is 24.0 wt%. This catalyst is designated cat-A.

Embodiment 2

[0027] The preparation of embodiment 2 NiW / CY-β-ASA catalyst

[0028] Add 100gHY molecular sieve to 500ml with a concentration of 1.0mol.L -1 In the citric acid solution, react at 60°C for 3 hours, then dry at 120°C for 2 hours, and bake at 500°C for 3 hours to obtain a modified Y-type molecular sieve, which is denoted as CY. The composite carrier and catalyst were prepared according to the method of Example 1, and the catalyst was designated as cat-B.

Embodiment 3

[0029] Embodiment 3 Preparation of NiW / CY / β1-ASA catalyst

[0030] CY molecular sieves were prepared according to the method in Example 2. CY molecular sieve and β molecular sieve are mixed and beaten, and the mass ratio of CY molecular sieve and β molecular sieve in the slurry is 8:2, and this slurry is recorded as A; according to the method of the comparative example, the amorphous silica aluminum is prepared, and the precipitant is added dropwise, and water is added. After the glass is aged, add the molecular sieve slurry A. After the aging, filter, wash, dry, shape, and roast the precipitate to obtain an in-situ composite carrier. The mass of the molecular sieve in the composite carrier accounts for 30% of the carrier, and the rest of the steps are carried out according to Example 1 prepares the catalyst, which is designated as cat-C.

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Abstract

The invention relates to a method for producing a chemical raw material by hydrocracking. A catalyst for producing the chemical raw material by hydrocracking comprises the following components in percentage by weight according to 100 percent by weight of the catalyst: 30-70 percent of mesoporous amorphous silicon-aluminum, 10-30 percent of modified Y-type molecular sieve, 5-15 percent of Beta molecular sieve, 1-10 percent of NiO and 10-29 percent of WO3. The method for producing the chemical raw material by hydrocracking comprises the following steps of: loading metal components including Ni and W on a carrier by adopting a fractional infusion method, wherein a nickel acetate or nickel nitrate solution is used as a nickel source and ammonium meta-tungstate or ammonium tungstate is used as a tungsten source; adding a metric nickel salt solution in the preparation process of amorphous silicon-aluminum, wherein the addition amount of nickel accounts for 20-80 percent of the using amount of NiO in the catalyst; and preparing a mixed carrier and loading residual nickel salt solution and all tungsten salt solution by adopting a co-infusion isovolumetric method. The method disclosed by the invention has higher light oil recovery rate; meanwhile, heavy naphtha with high aromatic latent content and tail oil with BMCI (Bureau of Mines Correlation Index) value, which are respectively used as a favorable catalytic reforming raw material and a raw material for preparing ethylene by steam cracking, can be obtained.

Description

Technical field: [0001] The invention relates to a method for producing high-quality chemical raw materials by hydrocracking. Background technique: [0002] At present, the development of high-selectivity hydrocracking catalysts has become the main driving force for the development of chemical raw material-type hydrocracking processes, because the improvement of cracking selectivity can realize the maximum production of high-quality heavy naphtha catalytic reforming raw materials and high-quality light naphtha Steam cracking with tail oil to produce ethylene raw materials is of great significance to alleviate the shortage of chemical raw materials supply in my country. [0003] Chinese patent CN1059846C discloses a light oil hydrocracking catalyst, the catalyst is composed of: Y-type molecular sieve 50-65wt%, small-pore alumina 10-26wt%, tungsten oxide 18-26wt%, nickel oxide 4-6wt% %. The molecular sieve used in the carrier is a low-sodium high-silicon Y-type molecular siev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/20B01J29/80
Inventor 孙发民周亚松戴宝琴魏强张志华姜桂元田然马建英吕倩赵野秦丽红王东青杨忠华李海岩马守涛苟爱仙
Owner PETROCHINA CO LTD
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