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Mordenite and preparation method thereof

A technology of mordenite and crystal grains, which is applied in the field of mordenite and its preparation, and can solve the problems of large influence of mordenite framework structure, increased production cost, environmental pollution and the like

Pending Publication Date: 2022-06-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain mordenite with a higher silicon-aluminum ratio, it is necessary to carry out multiple acid leaching and aluminum removal operations, but the acid leaching and aluminum removal operations not only increase production costs, pollute the environment, but also have a great impact on the framework structure of mordenite

Method used

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  • Mordenite and preparation method thereof
  • Mordenite and preparation method thereof
  • Mordenite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] According to the molar composition of the reaction mixture: Si0 2 / A1 2 0 3 =60, H 2 0 / Si0 2 =5, R / Si0 2 =0.08, Na 2 0 / Si0 2 =0.10, followed by sodium metaaluminate solution, deionized water, 1,1,4,4-tetraethyl-1,4-diazonane-1,4-diammonium base (structure directing agent R), hydrogen Add sodium oxide and coarse silica gel to a 45mL Teflon container, stir well with a glass rod, mix the solid and liquid thoroughly for 15 minutes, cover the Teflon container, and put it into a steel high pressure The kettle was sealed to prevent leakage of the mixture in the container.

[0038] The above-mentioned autoclave filled with the mixture was placed in a rotating convection oven at 120° C., the rotation speed was set to 20 rpm, and the reaction was carried out for 1 day. The temperature was raised to 160° C. and the reaction was carried out for 6 days. After the reaction, the autoclave continued to stay in the oven for one day, cooled to room temperature naturally, and then...

Embodiment 2

[0044] According to the molar composition of the reaction mixture: Si0 2 / A1 2 0 3 =90, H 2 0 / Si0 2 =6.5, R / Si0 2 =0.15, Na 2 0 / Si0 2 =0.10, followed by sodium metaaluminate solution, deionized water, 1,1,4,4-tetraethyl-1,4-diazonane-1,4-diammonium base (structure directing agent R), hydrogen Add sodium oxide and coarse silica gel to a 45mL Teflon container, stir well with a glass rod, mix the solid and liquid thoroughly for 15 minutes, cover the Teflon container, and put it into a steel high pressure The kettle was sealed to prevent leakage of the mixture in the container.

[0045] The above-mentioned autoclave filled with the mixture was placed in a rotating convection oven at 120° C., the rotation speed was set to 20 rpm, and the reaction was carried out for 1 day. The temperature was raised to 160° C. and the reaction was carried out for 6 days. After the reaction, the autoclave continued to stay in the oven for one day, cooled to room temperature naturally, and th...

Embodiment 3

[0051] According to the molar composition of the reaction mixture: Si0 2 / A1 2 0 3 =120, H 2 0 / Si0 2 =6.5, R / Si0 2 =0.08, Na 2 0 / Si0 2 =0.10, followed by sodium metaaluminate solution, deionized water, 1,1,4,4-tetraethyl-1,4-diazonane-1,4-diammonium base (structure directing agent R), hydrogen Add sodium oxide and coarse silica gel to a 45mL Teflon container, stir well with a glass rod, mix the solid and liquid thoroughly for 15 minutes, cover the Teflon container, and put it into a steel high pressure The kettle was sealed to prevent leakage of the mixture in the container.

[0052] The above-mentioned autoclave filled with the mixture was placed in a rotating convection oven at 120° C., the rotation speed was set to 20 rpm, and the reaction was carried out for 1 day. The temperature was raised to 160° C. and the reaction was carried out for 6 days. After the reaction, the autoclave continued to stay in the oven for one day, cooled to room temperature naturally, and t...

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Abstract

The mordenite provided by the invention is characterized in that crystal grains of the mordenite have columnar morphology, layered bulges are arranged on the surfaces of the crystal grains, the grain size of the crystal grains is 1-5 microns, and the atomic ratio of silicon to aluminum is 20-100. The mordenite disclosed by the invention is directly prepared by taking 1, 1, 4, 4-tetraethyl-1, 4-diazane-1, 4-diammonium base as a structure-directing agent and adopting a two-stage hydrothermal crystallization method in an inorganic base environment.

Description

technical field [0001] The present invention relates to a zeolite material and a preparation method thereof, more particularly, the present invention relates to a mordenite and a preparation method thereof. Background technique [0002] Mordenite type (MOR) molecular sieve was first synthesized by Barrer in the 1940s. It has a one-dimensional twelve-membered ring straight cylindrical channel (pore diameter is 0.695nm×0.581nm), and the channel structure is Cmcm, Mordenite-type molecular sieves are an important class of catalysis and adsorption separation materials. They have excellent catalytic performance in reactions such as toluene disproportionation, alkylation, aromatic isomerization and toluene selective disproportionation. The silica-alumina ratio of the mordenite zeolite powder (NaMOR) synthesized by conventional methods is about 10-12. In order to obtain a mordenite with a higher silicon-alumina ratio, it is necessary to carry out multiple acid elution aluminum o...

Claims

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Application Information

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IPC IPC(8): C01B39/26
CPCC01B39/265C01P2002/72C01P2004/03
Inventor 王幼驹梁世航王永睿
Owner CHINA PETROLEUM & CHEM CORP
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