Method for synthesizing ethanethiol by recycling hydrogen sulfide under catalysis of rich-vacancy and modified molecular sieve

The invention discloses a method for synthesizing ethanethiol by recycling hydrogen sulfide under catalysis of a vacancy-rich modified molecular sieve, which is used for preparing ethanethiol by taking ethylene and hydrogen sulfide as raw materials and taking the vacancy-rich modified molecular sieve as a catalyst. Wherein the vacancy-rich and modified molecular sieve is prepared by replacing an aluminum source with a gallium source in a traditional mesoporous molecular sieve preparation process, then treating the prepared molecular sieve in concentrated nitric acid to enable the gallium element to be separated from a framework so as to generate defects, and finally loading Mo and La on the molecular sieve; the catalyst has the characteristics of high selectivity and high conversion rate in synthesis of ethanethiol, is long in service life, is suitable for industrial production and market popularization and application, and provides a new way for efficient production of ethanethiol. 本发明公开了一种富空位及改性分子筛催化硫化氢资源化合