Loaded type catalyst for preparing elemental phosphorus and preparation method thereof

Abstract

The invention discloses a loaded type catalyst for catalyzing and decomposing phosphine to prepare elemental phosphorus, which takes a carbon nano tube as carrier and forms Co-P / CNTs amorphous alloy together with Co and P. A method for preparing the loaded type catalyst comprises: water-soluble cobalt salt, sodium citrate, sodium hypophosphite and ammonium sulphate are dissolved in de-ionized water and then added with the carbon nano tube which is purified and functionalized, and is steeped by the cobalt salt; the pH of the reaction liquid is adjusted to be about 9 by using ammonia water; under the condition of 80-90 DEG C, the reaction liquid is added with potassium borohydride for initiation and then fully stirred, so that black precipitate is produced in the reaction; after being separated, the precipitate is respectively washed by the de-ionized water and absolute ethyl alcohol, and then put into the absolute ethyl alcohol to be saved. The invention has the advantages that the carbon nano tube (CNTs) is adopted as the carrier to prepare the Co-P / CNTs amorphous alloy which is taken as catalyst for pyrolyzing the phosphine, decomposition temperature is low, and the catalytic activity and the thermal stability are good.

Description

technical field [0001] The invention relates to a catalyst and its preparation technology, in particular to a supported catalyst for preparing elemental phosphorus and its preparation method. Background technique [0002] High-purity phosphorus is a prerequisite for fine phosphorus chemical industry. The development of electronic-grade phosphorus with high added value has good economic value and social benefits. Decomposing phosphine under catalytic conditions to prepare high-purity phosphorus is the most commonly used method. The catalysts currently used generally have disadvantages such as complex processes, low conversion rates, high energy consumption, and poor stability. [0003] As a new type of catalytic material, amorphous alloy is favored by catalytic workers. It will be an ideal choice if amorphous alloy is used as a catalyst carrier for decomposing phosphine to prepare high-purity phosphorus, but amorphous alloy In a metastable state, it is easy to accumulate and...

AI Technical Summary

Problems solved by technology

Decomposing phosphine under catalytic conditions to prepare high-purity phosphorus is the most commonly used method. The catalysts currently used generally have disadvantages such as complicated processes, low conversion rates, high energy consumption, and poor stability.

[0003] As a new type of catalytic material, amorphous alloy is favored by catalytic workers. It will be an ideal choice if amorphous alloy is used as a catalyst carrier for decomposing phosphine to prepare high-purity phosphorus, but amorphous alloy In a metastable state, it is easy to accumulate and crystallize at high temperature to reduce its catalytic activity

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