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Titanium-rich lamellar Ti-Si molecular sieve and compound method thereof

A technology of titanium-silicon molecular sieve and synthesis method, which is applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of low olefin chain olefin epoxidation activity and low skeleton Ti content, and achieve high chain olefin epoxidation Effects of catalytic activity, increased framework titanium content, and good catalytic performance for the epoxidation of macrocyclic olefins and unsaturated ketones

Inactive Publication Date: 2012-09-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires that the gel for the preparation of the Ti-YNU-1 layered precursor must be a high-silica gel (Si / Ti≧85), resulting in a very low content of Ti in the skeleton (Si / Ti≧140), and olefins , especially chain olefin epoxidation activity is not high

Method used

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  • Titanium-rich lamellar Ti-Si molecular sieve and compound method thereof
  • Titanium-rich lamellar Ti-Si molecular sieve and compound method thereof
  • Titanium-rich lamellar Ti-Si molecular sieve and compound method thereof

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Embodiment 1

[0032] (1) The first step: B-MWW molecular sieves with deep deboronization are prepared by the following method: gel synthesis made of silicon source, boron source, organic template agent and water, wherein the silicon source is silica sol, organic template The agent is hexamethyleneimine, the boron source is boric acid, the silicon source and the boron source are SiO 2 and B 2 o 3 In terms of molar ratio, the gel is composed of SiO 2 :B 2 o 3 : organic templating agent: H 2 O = 1:0.65:1.4:19, crystallized at 170 o C was carried out at a constant temperature for 7 days to obtain the product, and the product was filtered, washed, and 100 o C dry and 550 o After C was roasted for 10 hours, it was treated with 6 mol / L nitric acid under boiling conditions for 22 hours, and the nitric acid solution / calcined B-MWW = 40 mL / g. The acid-treated product is filtered, washed and dried to obtain a deep deboronated B-MWW molecular sieve.

[0033] (2) In the second step, the reactio...

Embodiment 2

[0038] (1) In the first step: gel synthesis made of silicon source, boron source, organic template agent and water, wherein the silicon source is silica, the organic template agent is piperidine, the boron source is boric acid, and the silicon source and boron source respectively as SiO 2 and B 2 o 3 In terms of molar ratio, the gel is composed of SiO 2 :B 2 o 3 : organic templating agent: H 2 O = 1:0.65:1.4:19, crystallized at 170 o C was carried out at a constant temperature for 7 days to obtain the product, and the product was filtered, washed, and 100 o C dry and 550 o After C was roasted for 10 hours, it was treated with 6 mol / L nitric acid under boiling conditions for 22 hours, and the nitric acid solution / calcined B-MWW = 40 mL / g. The acid-treated product is filtered, washed and dried to obtain a deep deboronated B-MWW molecular sieve.

[0039] (2) In the second step, the reaction mixture is composed of deeply deboronated B-MWW molecular sieves in molar ratio: ...

Embodiment 3

[0044] (1) In the first step: gel synthesis made of silicon source, boron source, organic template agent and water, wherein the silicon source is silica, the organic template agent is piperidine, the boron source is boric acid, and the silicon source and boron source respectively as SiO 2 and B 2 o 3 In terms of molar ratio, the gel is composed of SiO 2 :B 2 o 3 : organic templating agent: H 2 O = 1:0.65:1.4:19, crystallized at 170 o C was carried out at a constant temperature for 7 days to obtain the product, and the product was filtered, washed, and 100 o C dry and 550 o After C was roasted for 10 hours, it was treated with 6 mol / L nitric acid under boiling conditions for 22 hours, and the nitric acid solution / calcined B-MWW = 40 mL / g. The acid-treated product is filtered, washed and dried to obtain a deep deboronated B-MWW molecular sieve.

[0045] (2) In the second step, the reaction mixture is composed of deeply deboronated B-MWW molecular sieves in molar ratio: ...

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Abstract

The invention relates to a titanium-rich lamellar Ti-Si molecular sieve and a compound method thereof. The titanium-rich lamellar Ti-Si molecular sieve employs the main elements of silicon, titanium and oxygen, and the mol component of the sieve is xTiO2:SiO2 (x ranges from 0.001 to 0.02) in the form of oxide. The titanium-rich lamellar Ti-Si molecular sieve and the compound method have the advantages that the titanium content is large, and the titanium content can be increased selectively in a 10-membered ring channel in theTi-YNU-1 molecular sieve layer, thereby realizing not only favorable macrocycloalkene and unsaturated ketone ring oxidation catalysis function, but also higher chain-type cycloalkene oxidation catalysis activity.

Description

technical field [0001] The invention belongs to a molecular sieve and a synthesis method, in particular to a titanium-rich layered titanium-silicon molecular sieve and a synthesis method. Background technique [0002] Titanium-silicon molecular sieves have attracted much attention because they can form a heterogeneous catalytic system with aqueous hydrogen peroxide as an oxidant to efficiently and cleanly catalyze and oxidize a series of liquid-phase oxidation reactions of organic compounds with important industrial application value. Among them, the TS-1 molecular sieve (US 4, 410, 501) developed by the Italian EniChem company in 1983 is the most widely used and the most mature synthesis technology. However, TS-1 is a ten-membered ring channel system with a small pore size, so it cannot meet The need to catalyze oxidation reactions of macromolecules. [0003] In recent years, MWW (that is, MCM-22) molecular sieves have attracted much attention because of their unique pore ...

Claims

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Application Information

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IPC IPC(8): C01B39/08
Inventor 樊卫斌宋双双董梅何月李俊汾王建国
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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