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Catalytic cracking additive for increasing concentration of low-carbon olefins and preparation method thereof

A catalytic cracking aid and low-carbon olefin technology, applied in the field of catalytic cracking aid of beta molecular sieve, can solve the problems of reducing coke output, low isobutene concentration, and high coke yield

Active Publication Date: 2017-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of low concentration of isobutene in the liquefied gas obtained by catalytic cracking and high coke yield in the prior art, to provide a catalytic cracking additive and a preparation method thereof for increasing the concentration of low-carbon olefins, The additive used in the catalytic cracking process can increase the concentration of isobutene in the catalytic cracking liquefied gas, reduce the output of coke, and at the same time, the heavy oil conversion ability of the main catalyst will not be affected when the additive is added in a large proportion

Method used

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  • Catalytic cracking additive for increasing concentration of low-carbon olefins and preparation method thereof
  • Catalytic cracking additive for increasing concentration of low-carbon olefins and preparation method thereof
  • Catalytic cracking additive for increasing concentration of low-carbon olefins and preparation method thereof

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preparation example Construction

[0033] In the method for preparing catalytic cracking additives for increasing the concentration of low-carbon olefins provided by the present invention, in the process of mixing and beating, there is no special requirement for the order of adding each component, for example, the first binder, the second The order of addition of the second binder, boron-modified phosphorous and metal-containing beta molecular sieve, optional second clay, optional Group VIII metal additive is mixed (when no second clay and Group VIII metal additive are present then The addition step of the second clay and Group VIII metal additive can be omitted).

[0034]In the present invention, the drying molding can be, for example, spray drying, and the method of spray drying is well known to those skilled in the art, and there is no special requirement in the present invention. The calcination method and conditions are well known to those skilled in the art, for example, the calcination temperature is 400...

Embodiment 1

[0093] This example is used to illustrate the preparation method of the phosphorous and metal-containing β molecular sieve of the present invention.

[0094] (1) Beta zeolite (Naβ, produced by Qilu Catalyst Factory, SiO 2 / Al 2 o 3 =25, the sodium oxide content is 4.5% by weight, the same below) with NH 4 Cl solution exchange wash to Na 2 The O content is lower than 0.2% by weight, and the filter cake is obtained by filtering;

[0095] (2) Dry the filter cake obtained in (1), roast the obtained sample at 350°C for 2 hours, then heat up to 550°C for 40 minutes and roast for 4 hours to remove the templating agent to obtain molecular sieves;

[0096] (3) get the molecular sieve 100g (dry basis) that (2) obtains and add water and be mixed with the molecular sieve slurry that solid content is 40% by weight, and with the H of 6.8g 3 PO 4 (concentration 85% by weight) and 3.2g of Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30g of water and mixed, soaked and dried to obtain a sample...

Embodiment 2

[0100] This example is used to illustrate the preparation method of the phosphorous and metal-containing β molecular sieve of the present invention.

[0101] (1) Beta zeolite with NH 4 Cl solution exchange wash to Na 2 The O content is lower than 0.2% by weight, and the filter cake is obtained by filtering;

[0102] (2) Dry the filter cake obtained in (1), roast the obtained sample at 150°C for 2 hours, then heat up to 350°C for 2 hours in 30 minutes, then heat up to 500°C for 4 hours in 30 minutes to remove the templating agent , get molecular sieve;

[0103] (3) Add water to the molecular sieve 100g (dry basis) obtained in (2) to prepare a molecular sieve slurry with a solid content of 40% by weight, and mix it with 11.8g of H 3 PO 4 (concentration 85% by weight) and 6.3g of CuCl 2 The solution prepared by dissolving in 90g of water was mixed, dipped and dried to obtain the sample;

[0104] (4) Calcining the sample obtained in (3) at 550° C. for 2 hours to obtain the p...

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Abstract

The invention discloses a catalytic cracking additive for increasing the concentration of low-carbon olefins and a preparation method thereof. The additives include: boron-modified phosphorus and metal-containing β molecular sieves, a first binder, a second binder, VIII group metal additives, and an optional second clay; wherein, the boron-modified phosphorus- and metal-containing In the metal beta molecular sieve, the boron content is 0.5-10% by weight as B2O3; in the phosphorus and metal-containing beta molecular sieve, the phosphorus content is 1-10% by weight as P2O5, and the metal content is 0.5-10% by metal oxide. % by weight, and in the 27Al MAS NMR spectrum of β molecular sieves containing phosphorus and metals, the ratio of the peak area of ​​the resonance signal with a chemical shift of 40 ± 3 ppm to the peak area of ​​the resonance signal with a chemical shift of 54 ± 3 ppm is 1 or more . The catalytic cracking additive is applied to the catalytic cracking of petroleum hydrocarbons, and can increase the concentration of isobutene in the catalytic cracking liquefied gas and reduce coke output at the same time.

Description

technical field [0001] The present invention relates to a catalytic cracking aid for increasing the concentration of low-carbon olefins and a preparation method thereof. Further, the present invention relates to a catalytic cracking aid comprising a boron-modified phosphorus- and metal-containing β molecular sieve and the preparation of the catalytic cracking aid. The method of cracking aids. Background technique [0002] Low-carbon olefins are important organic chemical raw materials, and the world's demand for low-carbon olefins is increasing year by year. Fluid catalytic cracking is one of the important processes for producing low-carbon olefins. For most catalytic cracking units, adding additives is an effective technical way to increase the production of low-carbon olefins. However, the prior art has no obvious effect on increasing the concentration of isobutene in liquefied gas. From the perspective of isobutene formation and reaction chemistry in the FCC process, β ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06B01J29/072B01J29/076C10G11/05
Inventor 陈蓓艳欧阳颖朱玉霞罗一斌蒋文斌任飞沈宁元黄志青宋海涛邓景辉
Owner CHINA PETROLEUM & CHEM CORP