Method for using load type platinum catalyst for preparing perfluoroalkyl group ethyl silane and method for preparing load type platinum catalyst

Abstract

The invention discloses a method for using a load type platinum catalyst for preparing perfluoroalkyl group ethyl silane and a method for preparing the load type platinum catalyst. The method for preparing perfluoroalkyl groups comprises the following steps that 1, perfluoroalkyl group ethyl and the catalyst are added into a reaction flask at first and stirred uniformly; 2, chloride silane is dripped continuously, and dripping time is controlled to be 0.5-1 h; 3, after feeding is finished, reaction temperature is controlled, and reaction time is 1-8 h; 4, after reaction is finished, cooling is carried out to reach room temperature, and filtering is carried out to obtain load type platinum catalyst filter residues; 5, coarse product filter liquor is rectified to obtain perfluoroalkyl group ethyl silane. The method for preparing the load type platinum catalyst comprises the steps that chloroplatinic acid is thrown into a reaction flask at first and dissolved into solvent, a carrier is added, and after standing for 24 h, the mixture is dried at the temperature of 120 DEG C to obtain the load type platinum catalyst finally. The preparing method overcomes the defect that in the past, hydrosilylation demands severe high-temperature and high-pressure conditions, the reaction can be carried out under the mild condition, and operation is safe.

Description

technical field [0001] The invention relates to a method for preparing perfluoroalkylethylsilane with a supported platinum catalyst and a method for preparing the supported platinum catalyst. Background technique [0002] Perfluoroalkylfluorosilane has good water, oil, and anti-fouling properties, and is widely used in the glass industry, automotive industry, electronics, and special surface coating treatment fields. It has good anti-fingerprint, anti-fouling, and anti-fog properties. At present, the commonly used waterproofing agents are mainly water-based crystalline osmotic waterproofing agents and silicone waterproofing agents. Water-based crystalline waterproofing agents are expensive, while silicone waterproofing agents cannot meet the needs of projects because of their permeability and ability to block larger pores. . Perfluoroalkylfluorosilane contains both fluorine and silicon. It combines the properties of organic fluorine and silicone. It has the characteristics ...

AI Technical Summary

Problems solved by technology

The preparation method has the following advantages: (1) overcomes the defect that the previous hydrosilylation requires high temperature and high pressure harsh conditions, the reaction can be carried out under relatively mild conditions, and the operation is safe; (2) the reaction yield is high; (3) It overcomes the defect that previous catalysts cannot be reused, and the supported platinum catalyst can be reused more than five times without a significant decrease in yield; (4) The reuse of the catalyst greatly reduces the cost and reduces environmental pollution at the same time

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