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Method for preparing rear earth Y type molecular sieve

A molecular sieve and rare earth technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as uneven distribution of rare earth ions, and achieve the effect of improving production efficiency

Inactive Publication Date: 2018-06-01
北京惠尔三吉绿色化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize the complete utilization of rare earth ions, but there will be inhomogeneity in the deposition process of rare earth, which will lead to the uneven distribution of rare earth ions in REY

Method used

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  • Method for preparing rear earth Y type molecular sieve
  • Method for preparing rear earth Y type molecular sieve
  • Method for preparing rear earth Y type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Weigh 177 grams of NaY molecular sieve (about 150 grams on a dry basis), add 750 grams of deionized water at 70°C, add 9 grams of lanthanum chloride while stirring, stir and exchange at 70°C for 60 minutes, and then add oxalic acid with a concentration of 15% solution, continue to stir for 20 minutes, then wash and filter with 225 grams of deionized water at 70°C, and discard the waste filtrate to obtain a reuse filter cake; add 525 grams of deionized water at 50°C to the reuse filter cake, while Add 52.5 grams of lanthanum chloride while stirring, stir for 60 minutes at 50°C, then wash and filter with 225 grams of 70°C deionized water to obtain product filter cake A and reuse filtrate C; 177 grams of NaY molecular sieve ( about 150 grams on a dry basis), was added to 750 g of recycled filtrate C, stirred at 70°C for 60 minutes, then added with a concentration of 15% oxalic acid solution, continued to stir for 20 minutes, and then deionized with 225 grams of 70°C Wash w...

Embodiment 2

[0055] Weigh 177 grams of NaY molecular sieve (about 150 grams on a dry basis), add 750 grams of deionized water at 60°C, add 9 grams of lanthanum chloride while stirring, stir and exchange at 60°C for 60 minutes, and then add oxalic acid with a concentration of 15% solution, continue stirring for 20 minutes, then wash and filter with 225 grams of deionized water at 60°C, and discard the waste filtrate to obtain a reuse filter cake; add 525 grams of deionized water at 50°C to the reuse filter cake, and Add 45.0 grams of lanthanum chloride while stirring, stir for 60 minutes at 60° C., then wash and filter with 225 grams of deionized water at 60° C. to obtain product filter cake A and reuse filtrate C; 177 grams of NaY molecular sieve ( about 150 grams on a dry basis), was added to 750 g of recycled filtrate C, stirred at 60°C for 60 minutes, then added with a concentration of 15% oxalic acid solution, continued to stir for 20 minutes, and then deionized with 225 grams of 60°C ...

Embodiment 3

[0057]Weigh 177 grams of NaY molecular sieve (about 150 grams on a dry basis), add 750 grams of deionized water at 50°C, add 9 grams of lanthanum chloride while stirring, stir and exchange at 50°C for 60 minutes, and then add oxalic acid solution with a concentration of 15% , continue to stir for 20 minutes, then wash and filter with 225 grams of deionized water at 50°C, and discard the waste filtrate to obtain a reuse filter cake; add 525 grams of deionized water at 50°C to the reuse filter cake, while stirring While adding lanthanum chloride 37.5 grams, stirred at 50 DEG C for 60 minutes, then washed and filtered with 225 grams of deionized water at 50 DEG C to obtain product filter cake A and reuse filtrate C; 177 grams of NaY molecular sieve (dry base about 150 grams), added to 750 g of reuse filtrate C, stirred for 60 minutes at 50°C, then added a 15% oxalic acid solution, continued to stir for 20 minutes, and then used 225 grams of 50°C deionized water Washing, filtering...

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Abstract

The invention provides a preparation method of a rear earth Y type molecular sieve. The method comprises the following steps: firstly mixing a NaY molecular sieve, a rare earth chloride solution and deionized water to perform ion exchange, adding an oxalic acid solution in exchange fluid to enable unexchanged rear earth to be completely precipitated, adding rare earth chloride in a filter cake after filtration, so as to perform ion exchange with the deionized water, obtaining a filter cake and reuse filtrate through filtering, and performing muffle roasting on the filter cake, so as to obtaina product REY; completely or partly replacing the rare earth chloride solution with the reuse filtrate, and performing the ion exchange process of the next batch of NaY molecular sieve. The method canrecycle rear earth, ensures that the use ratio of rear earth almost reach 100 percent under the condition that equipment is not added, reduces the production cost, efficiently utilizes nonrenewable rear earth resources, can obtain REY with high content of rear earth, has the advantages of high activity and heat stability; in addition, the heavy oil fluid catalytic cracking activity of the molecular sieve is obviously improved after the formed REY is cleaned through channels of oxalic acid.

Description

technical field [0001] The invention relates to a method for preparing rare earth Y-type molecular sieves. Background technique [0002] Y-type molecular sieves play an extremely important role in fluid catalytic cracking (FCC) catalysts, and have attracted the attention of researchers for many years. Y-type molecular sieves are modified with rare earths to obtain REY, REHY and REUSY. REY was developed first. It is generally A Y-type modified molecular sieve obtained by using NaY-type molecular sieves for two rare earth exchanges and two roastings. Since the advent of the molecular sieve, it has been widely used in the petroleum refining industry and is one of the main active components of the most important cracking catalyst. The Y-type molecular sieve after rare earth ion exchange (REY, also known as rare earth Y-type molecular sieve) is an active component of a catalytic cracking catalyst with high activity, high stability and anti-toxicity. [0003] First, rare earths ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08
CPCB01J29/088
Inventor 孙艳茹苗鹏杰张星龚小燕张芳张瑞驰
Owner 北京惠尔三吉绿色化学科技有限公司
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