Ultrastable Y-type RE molecular sieve active component and its prepn process

A technology of active components and molecular sieves, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the effect of reducing gasoline olefins, increasing the cost of catalyst manufacturing, and reducing the yield of light oil, etc. , to achieve the effect of reducing one roasting process, acidic structure and good surface properties, saving raw materials

Inactive Publication Date: 2004-06-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1217231A discloses the preparation method of phosphorus-containing zeolite molecular sieve, impregnating modified faujasite molecular sieve with phosphorus-containing solution, drying, and roasting at 450-600°C for more than 0.5 hours. The catalyst containing this molecular sieve increases the yield of diesel oil, but there is no description The effect of reducing gasoline olefins
[0006] To sum up, the olefin-reducing active component prepared by the prior art has a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]In a reactor with heating, add 3000 grams (dry basis) of sodium Y molecular sieve and a certain amount of deionized water to make a slurry with a solid content of 150 grams per liter, slowly add 2.14 liters of rare earth chloride to adjust the system pH = 3.2, raise the temperature to 90°C, exchange for 0.5 hours, filter, wash, and roast the filter cake at 510°C with 10% water vapor for 2.0 hours to obtain "one cross one roast" rare earth sodium Y, which is recorded as modified molecular sieve I. In the reactor with heating, add modified molecular sieve 1 500 grams (dry basis) and a certain amount of deionized water, make the slurry that solid content is 145 grams per liter, slowly add the rare earth chloride of 0.20 liters, adjust System pH=3.5, heat up to 90°C, exchange for 1.2 hours, then add 36 grams of ammonium phosphate and 200 grams of ammonium sulfate, stir evenly, keep at about 75°C for 0.5 hours, filter, wash, filter cake at 50% water vapor and 650°C Calcined a...

Embodiment 2

[0035] In a reactor with heating, add 3000 grams (dry basis) of sodium Y molecular sieve and a certain amount of deionized water to make a slurry with a solid content of 120 grams per liter, and slowly add 1.69 liters of rare earth nitrate to adjust the pH of the system =3.8, heated up to 78°C, exchanged for 1.0 hour, filtered, washed, and the filter cake was roasted at 80% water vapor and 620°C for 1.0 hour to obtain "one cross one roast" rare earth sodium Y, which was recorded as modified molecular sieve II. In a reactor with heating, add 500 grams of modified molecular sieve II (dry basis) and a certain amount of deionized water to make a slurry with a solid content of 125 grams per liter, and slowly add 0.28 liters of rare earth nitrate to adjust the system pH = 3.9, heat up to 85°C, exchange for 1.5 hours, then add 21 grams of diammonium hydrogen phosphate and 100 grams of ammonium sulfate, stir evenly, continue at about 70°C for 1.0 hours, filter, wash, filter cake in 20%...

Embodiment 3

[0037] In a reactor with heating, add 3000 grams (dry basis) of sodium Y molecular sieve and a certain amount of deionized water to make a slurry with a solid content of 100 grams per liter, slowly add 2.95 liters of rare earth nitrate to adjust the pH of the system =4.0, heated up to 82°C, exchanged for 1.5 hours, filtered, washed, and the filter cake was roasted at 50% water vapor and 640°C for 3.0 hours to obtain "one-to-one-roasted" rare earth sodium Y, which was recorded as modified molecular sieve III. In a reactor with heating, add 500 grams of modified molecular sieve III (dry basis) and a certain amount of deionized water to make a slurry with a solid content of 160 grams per liter, and slowly add 0.12 liters of rare earth chloride to adjust the system pH=3.1, heat up to 80°C, exchange for 0.6 hours, then add 45 grams of ammonium dihydrogen phosphate and 70 grams of ammonium nitrate, stir evenly, keep at 70°C for 2.0 hours, filter, wash, filter cake in 85% water vapor ...

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Abstract

The active component of ultrastable Y-type RE molecular sieve is composite modified Y-zeolite containing RE oxide 8-25 wt%, P 0.1-3.0 wt% and sodium oxide 0.3-2.5 wt%, and with degree of crystallization 30-55 % and unit cell parameter 2.455-2.477 nm. It is prepared with Y-zeolite as material and through the steps of exchange with RE and the first roasting to obtain RE-Na Y-zeolite; reaction with RE, reaction with P-containing compound, and the second roasting. The ultrastable Y-type RE molecular sieve is used as the active component of cracking catalyst and has the obvious effect of lowering olefin content in gasoline and the features of resulting in moderate coke yield and high diesel oil yield. The preparation process is simple and high in the utilization of the modifying elements.

Description

technical field [0001] The invention relates to an active component of an ultra-stable rare earth Y molecular sieve and a preparation method thereof, more specifically, an active component of a cracking catalyst suitable for reducing gasoline olefins in a catalytic cracking process and a preparation method thereof. Background technique [0002] The high olefin content in gasoline is one of the main causes of high vehicle exhaust emissions. As many as 80% of the total domestic gasoline has an olefin content of 40-60% in cracked gasoline, which is far from the new national standard (the olefin content does not exceed 35v%). The development of cracking catalysts with strong ability to reduce olefins has become the research focus in the field of catalysis. The preparation of active components is a key technology in the development of olefin-reducing catalysts. [0003] From the perspective of the international FCC catalyst market, the well-known AKZO catalyst company and GRACE...

Claims

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Application Information

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IPC IPC(8): B01J29/08
Inventor 刘丛华张海涛丁伟张忠东谭争国
Owner PETROCHINA CO LTD
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