Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of synthetic method of solid waste hierarchical porous block ECR-1 zeolite

A technology of ECR-1 and hole blocks, which is applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problems of no seed crystal guidance, long crystallization period, and no use of seed crystal guidance, etc. Achieve the effect of high added value utilization, shortened crystallization time and low cost

Active Publication Date: 2021-06-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the synthesis of ECR-1 molecular sieve has gone through the process of transition from the organic template method to the seed-directed method without organic templates, the raw materials used have not undergone essential breakthroughs, and the traditional water glass is still used as the silicon source. Sodium metaaluminate is the source of aluminum, and the seed crystal orientation directly related to its structure is not used, resulting in a long crystallization cycle, and the fastest time reported in the literature is 4 days
[0008] In summary, the applicant systematically consulted a large number of domestic patents and literature, and found no relevant reports on the synthesis of bulk ECR-1 zeolite molecular sieves from silica fume and metakaolin under the guidance of seed crystals.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of synthetic method of solid waste hierarchical porous block ECR-1 zeolite
  • A kind of synthetic method of solid waste hierarchical porous block ECR-1 zeolite
  • A kind of synthetic method of solid waste hierarchical porous block ECR-1 zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Accurately weigh silica fume, metakaolin, mordenite seed crystals, sodium hydroxide, and deionized water in a mass ratio of 2.3:1:0.2:0.5:1.57. Put the silica fume, metakaolin and mordenite seeds into the mixer and stir to form a mixture; dissolve the solid sodium hydroxide into deionized water, then pour the sodium hydroxide aqueous solution into the mixer containing the mixture and then stir , to form a uniformly mixed slurry; put the slurry into a 2cm×2cm×2cm six-joint steel mold, and vibrate it on a plastic sand vibrating table; seal the mold with a plastic film sealing bag, and place it in a constant temperature box at 50°C Cured for 24 hours, then removed from the mold to obtain a block test piece, put the block test piece into the reaction kettle, added 75mL deionized water, and sealed the kettle; 180°C hydrothermal reaction for 24 hours, took it out, washed it, dried it, and obtained a multi-level hole Bulk ECR-1 zeolite molecular sieve. figure 1 Figure a shows...

Embodiment 2

[0076] Accurately weigh silica fume, metakaolin, mordenite seed crystals, sodium hydroxide, and deionized water in a mass ratio of 2.3:1:0.2:0.5:1.57. Put the silica fume, metakaolin and mordenite seeds into the mixer and stir to form a mixture; dissolve the solid sodium hydroxide into deionized water, then pour the sodium hydroxide aqueous solution into the mixer containing the mixture and then stir , to form a uniformly mixed slurry; put the slurry into a 2cm×2cm×2cm six-joint steel mold, and vibrate it on a plastic sand vibrating table; seal the mold with a plastic film sealing bag, and place it in a constant temperature box at 50°C Cured for 24 hours, then removed from the mold to obtain a block test piece, put the block test piece into the reaction kettle, added 75mL deionized water, and sealed the kettle; 180°C hydrothermal reaction for 48 hours, took it out, washed it, and dried it to obtain a multi-level hole Bulk ECR-1 zeolite molecular sieve. figure 1 Figure b shows...

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 discloses a method for synthesizing a solid waste multi-stage porous block ECR-1 zeolite molecular sieve. The aqueous solution of silica fume, metakaolin, mordenite zeolite crystal seed and sodium hydroxide is put into a stirring device for mixing to form a slurry , after molding, curing, and demoulding to obtain a block; then, placing the block in a reaction kettle to crystallize to obtain a multi-level porous block ECR‑1 zeolite molecular sieve; wherein: silica fume, metakaolin, and mordenite seed crystals , The mass ratio of solid sodium hydroxide to deionized water is 2.3:1:0.2:0.5:1.57. The preparation process does not need to add a template agent, which avoids the high energy consumption and environmental pollution caused by high-temperature roasting and decomposition of the organic template agent; at the same time, the synthesized block molecular sieve overcomes many problems such as filtration and separation of powder particles in the application process; the synthesis process The process is simple, the cost is low, the crystallization time is greatly shortened, and the high value-added utilization of industrial solid waste and natural minerals can be realized.

Description

technical field [0001] The invention belongs to the field of synthesis of zeolite molecular sieves and the utilization of solid waste resources thereof, and relates to the synthesis of zeolite molecular sieves, in particular to a method for synthesizing green resource utilization multi-stage porous block ECR-1 zeolite of silica fume, which is a solid waste. Background technique [0002] Silica fume is a by-product of the smelting process of alloys such as metal silicon or ferrosilicon, usually white or gray, with a large specific surface area and high activity [1-2] . Silica fume contains a large amount of active silicon oxide, and its resource utilization can not only reduce environmental pollution, improve the ecological environment, but also turn waste into treasure, which is one of the important ways for the sustainable development of the silicon industry. [0003] At present, silica fume is mainly used in concrete admixtures [3] , cement mixture [4] , Refractories [...

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 Patents(China)
IPC IPC(8): C01B39/46B82Y40/00
CPCB82Y40/00C01B39/46C01P2002/72C01P2004/01C01P2004/03C01P2006/14C01P2006/16
Inventor 张耀君陈浩贺攀阳韩智超张叶刘礼才
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY