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Non-crystal inorganic structure guide agent for synthesizing nano/submicrometer high silicon ZSM-5 zeolite and its preparing process

A technology of ZSM-5 and amorphous state, which is applied in the field of synthesizing submicron high-silicon ZSM-5 zeolite, can solve the problems of limited application, and achieve the effect of simple equipment, wide range and low cost of raw materials

Inactive Publication Date: 2008-03-05
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the application in industry is limited

Method used

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  • Non-crystal inorganic structure guide agent for synthesizing nano/submicrometer high silicon ZSM-5 zeolite and its preparing process
  • Non-crystal inorganic structure guide agent for synthesizing nano/submicrometer high silicon ZSM-5 zeolite and its preparing process
  • Non-crystal inorganic structure guide agent for synthesizing nano/submicrometer high silicon ZSM-5 zeolite and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Commercial all-silicon ZSM-5 zeolite (produced by Shanghai Fuxu Molecular Sieve Co., Ltd.) reacted with lye according to the following steps to prepare amorphous inorganic directing agent A.

[0027] I. The commercial all-silicon ZSM-5 zeolite is placed in a roasting dish, roasted at 550°C for 2 hours, and taken out after cooling down for later use.

[0028] II. Weigh 5.0 grams of the zeolite roasted in step I, place it in a 500mL stainless steel container, add 80 grams of 5wt% sodium hydroxide solution, stir well and then seal it.

[0029] III. Heat to boiling, stop heating after 1 hour. After cooling, filtering and drying, the amorphous inorganic directing agent A is obtained.

Embodiment 2

[0031] Commercial all-silicon ZSM-5 zeolite reacts with lye according to the following steps to prepare amorphous inorganic directing agent A'.

[0032] 1. take by weighing the zeolite that the I step roasting of 3.0 grams of embodiment 1 is placed in the 500mL stainless steel container, add 300 grams of 15wt% sodium hydroxide solution again, seal after stirring.

[0033] II. Heat to boiling, stop heating after 15 minutes. After cooling, filtering and drying, the amorphous inorganic directing agent A' was obtained.

Embodiment 3

[0035] Commercial all-silicon ZSM-5 zeolite reacts with lye according to the following steps to prepare semi-crystalline inorganic directing agent B.

[0036] 1. take by weighing the zeolite that the I step roasting of 3.0 grams of embodiment 1 is placed in the 500mL stainless steel container, add 450 grams of 2wt% sodium hydroxide solution again, seal after stirring.

[0037] II. Heat to boiling, stop heating after 25-30 minutes. After cooling, filtering and drying, the semi-crystalline inorganic directing agent B is obtained.

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Abstract

The present invention belongs to the field of microporous material, and especially a kind of novel amorphous inorganic structure guide agent and its preparation. The inorganic guide agent is obtained through dissolving commercial ZSM-5 zeolite in alkali solution at 80-120 deg.c, and has its order structure destructed and only initial structure maintained. By means of altering the alkali solution, commercial zeolite composition, etc, different kinds of inorganic guide agent may be obtained for synthesizing nanometer / submicron level ZSM-5 zeolite in different Si / Al ratio. The process of the present invention is reasonable, simple in equipment and low in material cost, and the inorganic guide agent may be used in synthesizing product with wide Si / Al ratio range and has wide application in synthesizing nanometer / submicron zeolite molecular sieve material, etc.

Description

technical field [0001] The invention belongs to the technical field of microporous materials, and specifically relates to a novel amorphous inorganic structure-directing agent and a preparation method thereof, which can be used for synthesizing high-silica zeolite molecular sieves with nano / submicron particle sizes, especially for synthesizing submicron high-silica molecular sieves. Silica ZSM-5 type zeolite. This technology has broad application prospects in the synthesis of nano / submicron zeolite molecular sieve materials. Background technique [0002] As we all know, zeolite molecular sieves are widely used in petrochemical, fine chemical, environmental protection and functional materials and other fields. Catalysts for ethylene, propylene and butene, and catalysts for shape-selective aromatization, isomerization, alkylation, etc. In recent years, with the increasing demand for high-selectivity and high-performance adsorption and separation materials in the field of env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/38
Inventor 余辉汪靖龙英才
Owner FUDAN UNIV
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