Method for preparing NaY molecular sieve from active silicon powder and recycling mother liquor

A technology of active silicon and molecular sieve, which is applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problem of high energy consumption, achieve the goals of saving alkali consumption, reducing costs, and avoiding acid-base neutralization Effect

Pending Publication Date: 2021-07-23
3R ENVIRONMENTAL TECH CO LTD +1
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicon-aluminum powder used is melted at 1100°C-1450°C, and the energy consumption is relatively high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of method adopting active silicon powder to prepare NaY molecular sieve and mother liquor reuse is characterized in that, comprises the following steps:

[0025] Use 80kg of spent FCC catalyst, add 342kg of hydrochloric acid with a concentration of 30% according to 1.1 times of the theoretical acid consumption, stir and activate for 5 hours, then filter. The filtrate is used to extract valuable metals and prepare polyaluminum. After the filter residue is washed to neutral, it is dried to obtain active silicon slag.

[0026] Weigh 12.56kg of silicon slag into the reaction kettle, add 27.99kg of low-alkali sodium metaaluminate, and slowly add 11.6kg of guiding agent during stirring. After the reactor was heated to 60°C and stirred for 1 hour, 34.2kg of water was added, and the stirring was continued for 1 hour. The slurry material ratio is: Na 2 O: Al2O3: SiO2: H20=3.17:1:8.8:120.

[0027] After the above-mentioned gelation is completed, it is heated to 97° C., ...

Embodiment 2

[0031] A kind of method adopting active silicon powder to prepare NaY molecular sieve and mother liquor reuse is characterized in that, comprises the following steps:

[0032]Use 80kg of spent FCC catalyst, add 342kg of hydrochloric acid with a concentration of 30% according to 1.1 times of the theoretical acid consumption, stir and activate for 5 hours, then filter. The filtrate is used to extract valuable metals and prepare polyaluminum. After the filter residue is washed to neutral, it is dried to obtain active silicon slag.

[0033] Weigh 13kg of silicon slag into the reaction kettle, add 29.3kg of low-alkali sodium metaaluminate and 1.3kg of sodium hydroxide, and slowly add 11.6kg of guiding agent during stirring. After the reactor was heated to 60° C. and stirred for 1 hour, 32.9 kg of water was added, and the stirring was continued for 1 hour. The slurry material ratio is: Na 2 O: Al 2 o 3 : SiO 2 :H 2 0=3.7:1:8.8:120.

[0034] After the above-mentioned gelation ...

Embodiment 3

[0038] A kind of method adopting active silicon powder to prepare NaY molecular sieve and mother liquor reuse is characterized in that, comprises the following steps:

[0039] Use 80kg of spent FCC catalyst, add 342kg of hydrochloric acid with a concentration of 30% according to 1.1 times of the theoretical acid consumption, stir and activate for 5 hours, then filter. The filtrate is used to extract valuable metals and prepare polyaluminum. After the filter residue is washed to neutral, it is dried to obtain active silicon slag.

[0040] Weigh 13kg of silicon slag into the reaction kettle, add 29.3kg of low-alkali sodium metaaluminate and 1.3kg of sodium hydroxide, and slowly add 11.6kg of guiding agent during stirring. After the reactor was heated to 60° C. and stirred for 1 hour, 32.9 kg of water was added, and the stirring was continued for 1 hour. The slurry material ratio is: Na 2 O: Al 2 o 3 : SiO 2 :H 2 0=3.7:1:8.8:120.

[0041] After the above-mentioned gelation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of inorganic synthesis, and provides a method for preparing a NaY molecular sieve from active silicon powder and recycling mother liquor. The method comprises the following steps: S1, preparing active silicon powder; S2, preparing a NaY molecular sieve crystallization guiding agent; S3, performing gel forming; S4, performing crystallization; S5, recycling the mother liquor. Compared with water glass, alkali cannot be brought in by introducing a silicon source, the alkalinity cannot exceed the alkalinity requirement of NaY synthesis after the guiding agent and the low-alkalinity sodium metaaluminate are added, and aluminum sulfate is not needed for neutralization; unnecessary acid-base neutralization is avoided, the alkali consumption is reduced, and the cost is reduced; meanwhile, the mother liquor after crystallization of the molecular sieve does not contain sodium salt, and the mother liquor can be directly recycled.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis, and relates to a method for synthesizing NaY molecular sieves and reusing mother liquor. Background technique [0002] In industry, the production of NaY molecular sieves basically adopts the directing agent method proposed in USP3,639,099 and USP4,166,099. The specific content is roughly as follows: firstly, prepare a molecular composition of about (15-17)Na 2 O: Al 2 o 3 : (14-16) SiO 2 : (280-360)H 2 The directing agent of O, and then the directing agent is mixed with water glass, low-alkali sodium metaaluminate, aluminum sulfate, etc. to prepare a molar composition of (3-6) Na 2 O: Al 2 o 3 : (8-12) SiO 2 : (120-200) H 2 0, and then the reaction mixture was crystallized at about 100°C. After the crystallization is completed, filter, and the filter residue is washed and dried to obtain NaY molecular sieve powder, and after the mother liquor is separated, it contains excess...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24
Inventor 陈金发宋德生周志农嘉玮
Owner 3R ENVIRONMENTAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap