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A method for reusing nay crystallization mother liquor and/or filtrate and a preparation method for porous material

A technology for crystallization mother liquor and porous materials, applied in chemical instruments and methods, alkali metal aluminate/alumina/aluminum hydroxide preparation, inorganic chemistry, etc. The effect of processing costs and production costs, reducing production costs, and avoiding waste of raw materials

Active Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increasing trend of crude oil becoming heavier and inferior, microporous molecular sieves have a more obvious effect of restricting the diffusion of macromolecules such as heavy oil or residual oil due to their smaller pores, thus affecting the cracking reaction of macromolecules to a certain extent.

Method used

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  • A method for reusing nay crystallization mother liquor and/or filtrate and a preparation method for porous material
  • A method for reusing nay crystallization mother liquor and/or filtrate and a preparation method for porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example illustrates the recycling method, preparation method and porous material obtained by the present invention.

[0027] Take Al 2 (SO 4 ) 3 Solution (concentration 50gAl 2 o 3 / L) and ammonia (mass fraction 25%) are reaction raw materials, and Al 2 (SO 4 ) 3 Solution and ammoniacal liquor add in parallel flow, control gelation temperature to be 40 ℃, the pH value of gelation slurry is 9.0, add the mixed solution of the NaY crystallization mother liquor and filtrate (concentration 40gSiO 2 / L, suspension concentration 2200mg / L), then warm up to 70°C and age for 2 hours; after filtration, the resulting solid precipitate is calculated on a dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:0.7:10 was exchanged at 55°C for 0.5 hours, and the ammonium exchange was repeated once after filtering and washing, and the porous material was obtained after filtering again, which was designated as PM-1.

[0028] The main structure of PM-1 is a ...

Embodiment 2

[0030] This example illustrates the recycling method, preparation method and porous material obtained by the present invention.

[0031] Take Al 2 (SO 4 ) 3 The solution and ammonia water are used as the reaction raw materials, and the Al 2 (SO 4 ) 3 The solution and ammonia water were mixed to form a gel, the temperature of the gel was controlled at 30°C, and the pH value of the gel system was 10.5. 2 (SO 4 ) 3 When solution and ammoniacal liquor co-flow into gel, the NaY crystallization filtrate (concentration 35gSiO 2 / L, suspended matter concentration 3700mg / L) was added to the gelling slurry in the form of the third stream at the same time to complete the online addition of silicon source. Precipitate according to the dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:1:12 was exchanged at 50°C for 1 hour, filtered and washed with water to obtain a porous material, which was designated as PM-2.

[0032] The main structure of PM-2 is a pseud...

Embodiment 3

[0034] This example illustrates the recycling method, preparation method and porous material obtained by the present invention.

[0035] Take Al 2 (SO 4 ) 3 solution and NaAlO 2 Solution (concentration 102gAl 2 o 3 / L) as the reaction raw material, under vigorous stirring at 45°C, NaAlO 2 solution added to Al 2 (SO 4 ) 3 Carry out neutralization gelation in the solution, the pH value of gelation is controlled at 10.0, then add the NaY crystallization filtrate (concentration 32gSiO 2 / L, suspension concentration 6500mg / L), and warming up to 50°C for aging for 2 hours; after filtering, the resulting solid precipitate was calculated on a dry basis of the precipitate: HCl: H 2 The weight ratio of O=1:0.08:15 was exchanged at room temperature for 0.5 hour, filtered and washed with water to obtain a porous material, which was designated as PM-3.

[0036] The main structure of PM-3 is pseudo-boehmite crystal phase structure, and there are traces of FAU structure of Y-type m...

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Abstract

The invention relates to a recycling method for NaY crystallization mother liquor and / or filtrate. The recycling method for NaY crystallization mother liquor and / or filtrate is characterized in that the NaY crystallization mother liquor and / or filtrate which contains P-type stray grains or the NaY crystallization mother liquor and / or filtrate of which crystallization time exceeds 50 hours, the crystallinity is lower than 50% and a NaP crystalline phase is not seen in a phase spectrogram is directly used in a method for preparing a porous material. By the method, the preparation costs for the porous material are greatly reduced, meanwhile, pollution to the environment and waste to raw materials due to waste liquid emission are further avoided, and follow-up treatment costs and production costs of a catalyst factory are reduced favorably.

Description

technical field [0001] The invention relates to a method for reusing NaY crystallization mother liquor and / or filtrate and a method for preparing a porous material. Background technique [0002] Y-type molecular sieve is a kind of molecular sieve widely used in petroleum refining and processing. With the increasing demand for cracking catalysts in the market, the output of Y-type molecular sieve is also increasing. The annual output of Y-type molecular sieve in my country has reached 5 More than 10,000 tons, with the increase of output, the amount of NaY molecular sieve crystallization mother liquor and water washing filtrate also increases. Since the utilization rate of silicon in the synthesis process of NaY molecular sieve is relatively low, the silicon-aluminum ratio of the feed is much higher than that of the product, so the crystallization mother liquor and the washing filtrate contain a large amount of silicon, and if they are discharged directly, it will inevitably ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24C01B39/46
CPCC01B39/24C01B39/46C01F7/04C01P2002/72C01P2006/12C01P2006/16
Inventor 郑金玉王成强罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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