Superfine molecular sieves filtering separating and mother solution recovering method

A technology of filtration separation and mother liquor recovery, which is applied in filtration separation, separation methods, molecular sieve compounds, etc., can solve the problems of accelerating the filtration speed of one-cross-one-bake Y-type molecular sieve aqueous slurry, not proposing a separation method, increasing production costs, etc. The effect of low equipment cost, long service life and high production efficiency

Active Publication Date: 2007-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

CN1261215C discloses a method for filtering nano-molecular sieves. The method adds an alkaline medium before filtering nano-molecular sieves so that the pH of the solution is greater than or equal to 12, thereby preventing uncrystallized SiO 2 Agglomeration; CN1195678C discloses a method for filtering water slurry of Y-type molecular sieve, adding alkali or a mixture of alkali and salt in the slurry during filtration, this method can significantly accelerate the filtration speed of cross-baking Y-type molecular sieve water slurry, but The above two additionally increased production costs, and did not propose how to specifically carry out the separation method of ultrafine molecular sieves
CN1191125C discloses a m

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  • Superfine molecular sieves filtering separating and mother solution recovering method
  • Superfine molecular sieves filtering separating and mother solution recovering method
  • Superfine molecular sieves filtering separating and mother solution recovering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Filtration separation and mother liquor recovery of nano-beta molecular sieve slurry (all weight percentages in this description are by weight)

[0025] 7690 liters of nano-beta molecular sieve (Na 2 O content is 1%) slurry (d=1.30g / cm 3 ) into storage tank 1 (the material is 0Cr18Ni9Ti, 5m 3 ), use pump 2 (321 material) to transport into (flow rate is 30m 3 / h) Filtration and concentration assembly 3 performs filtration and separation, the slurry flows parallel to the filter cloth in a turbulent state, part of the mother liquor permeates out through the thin layer filter cake and filter cloth perpendicular to the filter cloth, and is collected into the filtrate collection tank to increase the concentration. The slurry is returned to the storage tank 1, so that it is concentrated to a solid content of about 42% in this way, and a total of 3200 liters of mother liquor is obtained.

[0026] When washing, add deionized water to the storage tank 1 to dilute to a solid c

Embodiment 2

[0029] Filtration Separation and Mother Liquor Recovery of Ultrafine TiZSM-5 Molecular Sieve

[0030] 4839 liters of superfine TiZSM-5 molecular sieve crystallization slurry (d=1.24g / cm 3 ) into the enamel-lined storage tank 1 (5m 3 ), use pump 6 (tetrafluoroethylene lined pump) to transport into (flow rate is 40m 3 / h) Filtration and concentration assembly 3 performs filtration and separation, the slurry flows parallel to the filter cloth in a turbulent state, part of the mother liquor penetrates through the thin layer filter cake and filter cloth perpendicular to the filter cloth, and is collected into the filtrate collection tank to increase the concentration. The slurry is returned to the storage tank 1, and thus circulated and concentrated to a solid content of about 40%, to obtain a total of 2,500 liters of mother liquor.

[0031] When washing, add deionized water to the storage tank 1 to dilute to a solid content of about 8%, and then enter the filter concentration c

Embodiment 3

[0034] Filtration Separation of Ultrafine ZSM-5 Molecular Sieve and Recovery of Mother Liquor

[0035] 6145 liters of ZSM-5 molecular sieve slurry (d=1.22g / cm 3 ) into storage tank 1 (the material is 316L, 5m 3 ), use pump 2 (321 material) to transport into (flow rate is 40m 3 / h) Filtration and concentration assembly 3 performs filtration and separation, the slurry flows parallel to the filter cloth in a turbulent state, part of the mother liquor permeates out through the thin layer filter cake and filter cloth perpendicular to the filter cloth, and is collected into the filtrate collection tank to increase the concentration. The slurry is returned to the storage tank 1, so that it is concentrated to a solid content of about 35% in this way, and a total of 2800 liters of mother liquor is obtained.

[0036] When washing, add deionized water to the storage tank 1 to dilute to a solid content of about 10%, and then enter the filter concentration component 3 for solid-liquid se

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Abstract

The invention relates to a method of filter separator of superfine molecular sieve and mother liquor recovery, comprising: firstly, the superfine molecular sieve seriflux is intensively mixed and pulp uniformly in the storage tank; the superfine molecular sieve seriflux is fed into the filter unit specially designed by the pump; the superfine molecular sieve seriflux is filtrated through the filter unit and then the filtrate flows into to the collecting tank; lastly, the seriflux concentrated flows back into the storage tank; the said filter unit accepts the superfine molecular sieve seriflux to do rapid turbulent motion in the channel with filter cloth where a layer of thin filter cake is formed, and liquid of the superfine molecular seriflux infiltrates out perpendicularly through the thin filter cake and the filter cloth to form perpendicular interlacing between the flow direction of superfine molecular sieve seriflux and that of the filtrate; the filtrate is connected as the mother liquor after flowing into the connecting tank. The method for filtrating using the cross-flow type thin filter cake, is capable of executing liquid-solid separation of superfine molecular sieve, especially for the high viscosity superfine molecular sieve, and recovery of the uperfine molecular sieve mother liquor is capable of reducing the cost of molecular sieve effectively, and abating the pollution to environment.

Description

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Claims

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Application Information

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Owner CHINA PETROLEUM & CHEM CORP
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