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Petroleum hydrocarbon cracking catalyst

A cracking catalyst and catalyst technology, used in cracking, petroleum industry, catalytic cracking and other directions, can solve the problems of difficult filtration, poor hydrothermal stability, etc., and achieve high micro-reactive activity, improved thermal stability, and good hydrothermal stability. Effect

Active Publication Date: 2006-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smaller the zeolite crystal grains, the worse its hydrothermal stability. In addition, the smaller the crystal grains, the more difficult it is to filter; the greater the surface energy, the easier it is to aggregate into clusters.
Therefore, the deficiency of the gel method to synthesize small-grain NaY has become the biggest obstacle to its industrial application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of directing agent: get 250 grams of sodium silicate solution (containing 20.05% by weight of SiO 2 , 6.41 wt% Na 2 (0), slowly add 120 grams of sodium metaaluminate solution (containing 3.15% by weight of Al 2 o 3 , 21.1 wt% Na 2 O), stirred for 1 hour, and aged at 20°C for 48 hours to obtain a directing agent. The composition of the directing agent is 16Na 2 O:Al 2 o 3 : 15SiO 2 : 320H 2 O.

[0038] (2) Preparation of composite materials

[0039] Kaolin with an average particle size of 4 μm (Suzhou, Yangshan brand, China Kaolin Company, crystal content is 80% by weight), roasted at 660 ° C for 3 hours to obtain metakaolin powder, pulverized to make metakaolin powder with a particle size of less than 230 μm .

[0040] Get 500 grams of pulverized metakaolin powder, add 2000 grams of sodium silicate solution (containing 20.05% by weight of SiO 2 , 6.41 wt% Na 2 (2), 300 gram (1) step preparation guide agent, 500 gram concentration is the sodi...

Embodiment 2

[0043] Composite material Y-2 was prepared according to the method of Example 1, except that the kaolin raw material was roasted at 680°C for 4 hours, and the stirring speed was 600 rpm when the raw material was crystallized. X-ray diffraction measurement of NaY content in Y-2 is 52.4% by weight, its physical and chemical properties are shown in Table 1, and the X-ray diffraction spectrum is shown in figure 1 , field emission scanning electron microscope (SEM) photos of different magnifications are shown in Figure 2-5 .

[0044] From figure 1 As can be seen from the X-diffraction spectrum, the composite material of the present invention has a characteristic peak of NaY, indicating that NaY is contained therein, and the content of NaY can be deduced from the area of ​​the characteristic peak.

[0045] SEM at 5000X magnification from Y-2 figure 2 It can be clearly seen that the composite material of the present invention is composed of nests with an equivalent diameter of l...

Embodiment 3

[0048] Composite material Y-3 is prepared according to the method of embodiment 1, and difference is that adding metakaolin powder is 5 grams, and sodium silicate solution is 20 grams, and directing agent is 2 grams, and the concentration of the sodium hydroxide solution that adds is 10% by weight, The addition amount is 20 grams, and then add 0.8 grams of EDTA, so that the raw material ratio is 2.29Na 2 O:Al 2 o 3 : 5.33SiO 2 : 87.1H 2 O, the crystallization time is 29 hours. The NaY content in the prepared Y-3 is 79.6% by weight, the unit cell constant is 24.68, and the physical and chemical properties are shown in Table 1.

[0049] Composite material number

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Abstract

This invention discloses a catalyst for cracking petroleum containing 10-50% nested y-type zeolite compound material in terms of the dry basis of the catalyst, which has good property of reducing olefine content in the catalyzed and cracked products, good ability for cracking heavy oil and coke selection and increases yield of light oil products.

Description

technical field [0001] The invention relates to a petroleum hydrocarbon cracking catalyst, and further relates to a petroleum hydrocarbon cracking catalyst containing a Y-type zeolite composite material. Background technique [0002] The active component of the catalytic cracking microsphere catalyst - Y-type zeolite is obtained by two techniques: one technique is to first use alkaline silica-alumina gel synthesis to obtain Y-type zeolite, then mix Y-type zeolite with the matrix, spray Dried to obtain microsphere catalysts, the Y-type zeolite synthesized by the alkaline silica-alumina gel has the characteristics of high molecular sieve content and high silica-alumina ratio. Different modification methods can have multiple reaction characteristics; another technology It is an in-situ crystallization technology, first forming microspheres, and then crystallizing on the microspheres to generate molecular sieves, directly obtaining catalyst microspher...

Claims

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Application Information

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IPC IPC(8): C10G11/05
Inventor 周继红宗保宁闵恩泽舒兴田何鸣元李明罡崇奇
Owner CHINA PETROLEUM & CHEM CORP