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Preparation method and application of metal modified MCM-41 molecular screen

A MCM-41, metal modification technology, applied in the direction of crystalline aluminosilicate zeolite, can solve the problems of high heat release, high thermal weight loss, low thermal degradation to carbon, etc., to achieve good thermal degradation performance, smoke emission Small, the effect of improving the flame retardant performance

Inactive Publication Date: 2016-06-01
HARBIN UNIV OF SCI & TECH
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  • Summary
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Problems solved by technology

[0004] In order to solve the problems of high thermal weight loss, high heat release, and low thermal degradation of existing IFR intumescent flame retardants and polyethylene materials, the present invention provides a method for preparing metal-modified MCM-41 molecular sieves and its application

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  • Preparation method and application of metal modified MCM-41 molecular screen
  • Preparation method and application of metal modified MCM-41 molecular screen
  • Preparation method and application of metal modified MCM-41 molecular screen

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specific Embodiment approach 1

[0019] Specific embodiment one: present embodiment a kind of preparation method of metal modified MCM-41 molecular sieve, this method is realized according to the following steps:

[0020] 1. Dissolve 0.56g-1.1g cetyltrimethylammonium bromide in 18mL-40mL deionized water, add 5mL ammonia water, 0.4g-0.7g tartaric acid and 0.4g-0.9g metal modifier in turn, and stir After 0.5h~1.5h, add 3mL~5mL of silicon source material, adjust the pH value to 8~12; continue to stir for 6h~8h, then adjust the temperature of the reactor to 90℃~120℃ for 24 hours;

[0021] 2. Take the reactants out of the reaction kettle, wash them with deionized water, filter them, put them in an oven, and dry them at 80°C for 5 to 8 hours, then place the dried reactants in a muffle furnace to Raise the temperature to 500°C-600°C at a heating rate of 3°C / min, and keep it warm for 3-8 hours. At this time, the template agent hexadecyltrimethylammonium bromide is removed, and the metal-modified MCM-41 molecular siev...

specific Embodiment approach 2

[0025] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass concentration of ammonia water described in step one is 20%. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the reagent used to adjust the pH value in step 1 is sodium hydroxide. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a preparation method and application of a metal modified MCM-41 molecular screen and relates to a preparation method and application of an MCM-41 molecular screen. The problems that an existing IFR intumescent flame retardant and an existing polyethylene material are high in thermal weight loss and thermal release and low in thermal degradation carbon forming are solved. The preparation method includes the steps that firstly, hexadecyl trimethyl ammonium bromide is taken to be dissolved in deionized water, and ammonia water, tartaric acid and a metal modifier are put in a reaction still for a reaction; secondly, a reactant is taken out of the reaction still, washed, subjected to suction filtration and then dried, and a template is removed. According to the application, IFR and the metal modified MCM-41 molecular screen are taken as raw materials and mixed and ground. The preparation method and application have the advantages that the metal modified MCM-41 molecular screen and FIR coordinate to achieve an outstanding fire retardant effect, mass production is easy, and toxicity is avoided. The metal modified MCM-41 molecular screen is used for fire retardant application to the polyethylene material.

Description

technical field [0001] The present invention relates to a preparation method and application of a metal modified MCM-41 molecular sieve Background technique [0002] Mesoporous molecular sieves refer to inorganic porous materials with a pore size between 2 and 10 nm, uniform pore distribution and regular pore structure. Due to the regular pore structure of mesoporous molecular sieves, polymer molecular chains can enter the molecular sieve channels and limit the molecular chain movement. The thermal decomposition of the chain and the release of small molecular substances generated by the decomposition can greatly improve the heat resistance of the material. At the same time, the molecular sieve also has good catalytic ability and is a kind of flame retardant with good performance. [0003] Polyethylene is a thermoplastic resin with properties such as odorless, non-toxic, low temperature resistance, and good chemical stability. It is widely used in production and life, but po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/06C08K7/26C08K9/02C08L23/06
CPCC01B39/06C01P2004/03C08K7/26C08K9/02C08L2201/02C08L23/06
Inventor 韩志东姜丽徐峰王永亮
Owner HARBIN UNIV OF SCI & TECH
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