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Anti-basic nitrogen liquefied gas yield increase cracking catalyst and preparation method thereof

A cracking catalyst, liquefied gas technology, applied in physical/chemical process catalysts, catalytic cracking, molecular sieve catalysts, etc., can solve the problems of low activity, no alkali-resistant nitrogen-producing liquefied gas cracking catalyst, and deterioration of product distribution, etc. Achieve the effect of high liquefied gas yield, high catalytic cracking activity and high conversion rate

Active Publication Date: 2014-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cracking catalysts still have the problems of low activity and poor product distribution when used in raw materials containing alkali nitrogen, and no cracking catalysts related to alkali nitrogen resistance and high production of liquefied gas have been found.

Method used

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  • Anti-basic nitrogen liquefied gas yield increase cracking catalyst and preparation method thereof
  • Anti-basic nitrogen liquefied gas yield increase cracking catalyst and preparation method thereof
  • Anti-basic nitrogen liquefied gas yield increase cracking catalyst and preparation method thereof

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preparation example Construction

[0053] The present invention also provides a kind of preparation method of the described catalytic cracking catalyst of resisting alkaline nitrogen and producing liquefied gas more, the method comprises the following steps:

[0054] (1) Using NaY molecular sieve as raw material, after rare earth exchange and roasting, "cross-baking" RENaY is obtained; then react with rare earth compounds, iron-containing substances, copper-containing substances, phosphorus-containing substances, and ammonium salts to obtain The Y molecular sieve product modified with rare earth and iron / copper / phosphorus is the active component of the first Y molecular sieve described in the present invention;

[0055] Wherein, the process of "cross-baking" RENaY is well known to those skilled in the art, usually NaY and rare earth compound are mixed in NaY:RE 2 o 3 =1:0.10-0.25 (weight ratio), pH=2.0-4.5, exchange temperature 25-100°C for 0.3-1.5 hours, filter, wash, filter cake at 400-850°C, 0-100% steam I...

Embodiment 1

[0075] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.

[0076](1) Preparation of modified Y-type molecular sieve

[0077] In the reactor, add 5.0 kilograms of NaY molecular sieves on a dry basis (Changling Catalyst Factory provides, crystallinity 86%, skeleton silicon-aluminum ratio (SiO 2 / Al 2 o 3 molar ratio) 5.2) and 4 kg of deionized water, slowly add 4.0 liters of rare earth chloride solution (provided by Qilu Catalyst Factory, RE 2 o 3 content of 222.5 grams per liter), adjust the system pH=3.5 with 4% by weight dilute hydrochloric acid, heat up to 90°C and stir for 1.5 hours, filter, wash, and dry; then bake at 650°C and 100% steam atmosphere for 2 hours to prepare Get "cross-baked" rare earth sodium Y, which is recorded as modified molecular sieve ABY-1A.

[0078] Take 2.0 kg of modified molecular sieve ABY-1A dry basis and put it into the reaction kettle, add 1.6 kg of deionized water, and slowly add 0.50 li...

Embodiment 2-7

[0085] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.

[0086] Prepare catalytic cracking catalyst according to the method of embodiment 1 respectively, difference is, in step (2), mesoporous silicon aluminum material, kaolin, described first Y-type molecular sieve ABY-1, described second Y-type molecular sieve The feed amounts of DASY2.0, the third Y-type molecular sieve, the first MFI structure molecular sieve, the second MFI structure molecular sieve, pseudo-boehmite and aluminum sol on a dry basis are shown in Table 2 below. , when there are multiple molecular sieves in the formula, they are all added in the form of molecular sieve mixed slurry, and the feeding amount of each component is in parts by weight, so as to prepare catalytic cracking catalysts C2-C7 respectively.

[0087] Table 2

[0088]

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Abstract

The invention relates to an anti-basic nitrogen liquefied gas yield increase cracking catalyst and a preparation method thereof. The catalyst comprises a cracking activity component, a mesoporous silicon-aluminum material, an adhesive and clay, wherein the cracking activity component comprises a Y type molecular sieve and a molecular sieve having an MFI structure, the Y type molecular sieve comprises a first Y type molecular sieve, rare earth content in the first Y type molecular sieve is 8-23 wt% (calculated as rare earth oxide), iron content in the first Y type molecular sieve is 0.1-3.0 wt% (calculated as Fe2O3), copper content in the first Y type molecular sieve is 0-3.0 wt% (calculated as CuO), phosphorus content in the first Y type molecular sieve is 0-2.0 wt% (calculated as P2O5), and sodium oxide content in the first Y type molecular sieve is 0.1-2.5 wt%. The catalyst preparation method comprises: carrying out pulping on a cracking activity component, a mesoporous silicon-aluminum material, an adhesive and clay, and carrying out spray drying, washing, filtering and drying. With application of the catalyst in catalytic cracking of basic nitrogen-containing feed stock, high conversion rate and high liquefied gas yield are provided.

Description

technical field [0001] The present invention relates to a catalytic cracking catalyst, more specifically to a cracking catalyst resistant to alkali nitrogen and prolific in producing liquefied gas. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts and are converted into high value-added products such as liquefied gas, gasoline, and diesel oil. In this process, it is usually necessary to use Catalytic material with high cracking activity. Microporous zeolite catalytic materials are widely used in petroleum refining and processing industries due to their excellent shape-selective catalytic performance and high cracking reactivity. With the depletion of petroleum resources and the requirements of environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80B01J29/14B01J29/40C10G11/05
Inventor 邓景辉王维家朱玉霞罗一斌张萍杨雪欧阳颖郑金玉任飞许明德
Owner CHINA PETROLEUM & CHEM CORP
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