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Preparation method for MCM-41 loaded Pt and Al catalyst and application thereof

A technology of MCM-41 and catalyst, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of non-reusable heterogeneous catalysts, reduced catalytic activity, difficult separation of products, etc., and achieve improvement Platinum metal agglomeration phenomenon, improvement of catalytic activity, and effect of reducing production cost

Inactive Publication Date: 2017-11-24
ZHONGKAI UNIV OF AGRI & ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the hydrosilylation reaction, due to the shortcomings of heterogeneous catalysts that cannot be reused and are difficult to separate from the product, people are committed to developing supported catalysts, which can be recycled and reused, easy to separate, and reduce costs.
However, the metals in the supported single metal catalyst are easy to agglomerate, which will reduce its catalytic activity; in order to further improve the catalytic ability of noble metal catalysts, considering the synergy between metals, the development of two-component or multi-component metal catalysts is a solution Efficient way to agglomerate metals

Method used

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  • Preparation method for MCM-41 loaded Pt and Al catalyst and application thereof
  • Preparation method for MCM-41 loaded Pt and Al catalyst and application thereof
  • Preparation method for MCM-41 loaded Pt and Al catalyst and application thereof

Examples

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Embodiment 1

[0027] Example 1, see Figure 1-Figure 3 :

[0028] The invention provides a kind of preparation method of MCM-41 loaded Pt, Al catalyst, comprises the steps:

[0029] 1) Preparation of mesoporous silicon MCM-41:

[0030] Add 1.5g of CTAB, 120mL of distilled water and 80mL of concentrated ammonia water into a three-necked flask, stir at 60°C for 1 hour, then add 4.5g of ethyl orthosilicate, continue stirring for 7 hours, then stop the reaction, crystallize at room temperature, filter, wash, drying, acidified ethanol solution (V 盐酸 :V 乙醇 =1:20) to remove CTAB, and washed to neutral, and then roasted at 400°C for 2h to obtain mesoporous silicon MCM-41, denoted as MCM;

[0031] 2) Preparation of MCM-41 supported Pt and Al catalysts:

[0032] Weigh 1.0g of activated mesoporous silicon MCM-41 and 35mL of dehydrated ethanol into a three-necked flask, pass N 2 After 0.5h, add 10mL of chloroplatinic acid-ethanol solution, stir at 75°C for 10h, then evaporate the ethanol to dryne...

Embodiment 2

[0033] Example 2, see Figure 1-Figure 3 :

[0034] The preparation process of this embodiment is basically the same as that of Example 1, the difference being: first add aluminum chloride-ethanol solution, and then add aluminum chloride-ethanol solution to prepare MCM-41, which is loaded with Al first and then with Pt. Recorded as Pt / Al-MCM.

Embodiment 3

[0035] Example 3, see Figure 1-Figure 3 :

[0036] The preparation process of this embodiment is basically the same as that of Example 1, except that the preparation of MCM-41 supported Pt and Al catalysts:

[0037] Weigh 1.0g of activated mesoporous silicon MCM-41 and 65mL of dehydrated ethanol into a three-necked flask, pass N 2 After 0.5h, add 10mL of chloroplatinic acid-ethanol solution and 15mL of aluminum chloride-ethanol solution, stir at 75°C for 10h, filter with distilled water, and then dry in a vacuum desiccator at 50°C to obtain MCM- 41 The catalyst supporting Pt and Al at the same time is denoted as Pt+Al-MCM.

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Abstract

The invention provides a preparation method for an MCM-41 loaded Pt and Al catalyst and application thereof. The method comprises the following steps: (1) preparing meso-porous silicon MCM-41, namely stirring cetyl trimethyl ammonium bromide, distilled water and concentrated ammonia water and then adding tetraethyl orthosilicate, continuously stirring for 7h and then stopping reaction, crystallizing under room temperature, filtering, washing and drying, removing cetyl trimethyl ammonium bromide, washing and roasting, thereby acquiring the meso-porous silicon MCM-41; (2) preparing the MCM-41 loaded Pt and Al catalyst, namely adding the activated meso-porous silicon MCM-41 and dehydrated ethyl alcohol into a container, introducing N2 for transition and then adding chloroplatinic acid-ethanol solution and aluminum chloride-ethanol solution, thereby acquiring the MCM-41 loaded Pt and Al catalyst. The catalyst is used for the catalytic hydrosilylation of heptamethyltrisiloxane and polyethylene glycol allyl ether. The product provided by the invention has the advantages of high stability, high reusability, high activity, convenience in recycling, low cost, and the like.

Description

technical field [0001] The invention relates to the technical field of catalyst manufacture, in particular to a preparation method and application of an MCM-41 loaded Pt and Al catalyst. Background technique [0002] In the hydrosilylation reaction, due to the shortcomings of heterogeneous catalysts that cannot be reused and are difficult to separate from the product, people are committed to developing supported catalysts, which can be recycled and reused, easy to separate, and reduce costs. However, the metals in the supported single metal catalyst are easy to agglomerate, which will reduce its catalytic activity; in order to further improve the catalytic ability of noble metal catalysts, considering the synergy between metals, the development of two-component or multi-component metal catalysts is a solution Efficient way to agglomerate metals. Therefore, the development of a supported platinum catalyst with good stability, good reusability, convenient recovery and low cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/04C08G65/336
CPCB01J29/0325B01J29/043B01J2229/186C08G65/336
Inventor 胡文斌陈秀莹谢慧琳周新华周红军舒绪刚郭雁梅胡骐朱贵有
Owner ZHONGKAI UNIV OF AGRI & ENG
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