▎ 摘　　要

NOVELTY - An nitrogen modified TS-1 catalyst carrier is cylindrical structure or disc structure with diameter of 3-250 mm, and height of 5-300 mm. The inside of catalyst carrier comprises three-dimensional channels connected with each other. The three-dimensional channel has average pore diameter of 0.1-500 mum. The thickness of the framework of three-dimensional channel is 0.05-500 mum. USE - Nitrogen modified TS-1 catalyst carrier used for loading TS1crystal grains and powders in propylene oxide production. ADVANTAGE - The nitrogen modified catalyst carrier can solve the problem that the catalyst structure of the existing one-step direct oxidation of propylene which is not suitable for preparing propylene oxide, and can maximize catalytic performance of TS1, eliminate internal diffusion, reduce selectivity of the side reaction and improve production efficiency and selectivity of the main product propylene oxide, and reduce production cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen modified TS-1 catalyst carrier, which involves cleaning three-dimensional channel carrier framework obtained by three-dimensional printing method or purchased in the market with 1-15% hydrochloric acid or phosphoric acid solution, then cleaning with pure water to neutrality, washing with 0.5-12.5% potassium hydroxide alkali solution or sodium carbonate solution, washing with pure water until neutrality, ultrasonically cleaning with 50-100% ethanol for 5-60 minutes, washing with pure water, drying in nitrogen atmosphere at 50-110degrees Celsius, performing oxidative treatment at 200-570degrees Celsius in air/nitrogen atmosphere for 2-60 minutes, reducing at 220-620degrees Celsius in nitrogen/hydrogen atmosphere for 5-120 minutes, placing in chemical vapor deposition furnace, growing nitrogen-doped carbon layer on the metal framework by feeding or pumping the nitrogen-containing compound and carbon-containing compound, growing at 320-1200degrees Celsius at heating rate of 0.5-20degrees Celsius/minute in argon or nitrogen/hydrogen gas mixture with gas velocity ratio of argon or nitrogen/hydrogen gas mixture of 0:200-500:0 for 2-120 minutes to form nitrogen-doped carbon layer, then coating TS-1 powder or TS-1 precursor glue on the surface of nitrogen-doped carbon layer, and post-treating to obtain monolithic TS1 catalyst.