Preheating process and start-up process for the ammoxidation reaction
AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsLe Zhao, Lianghua Wu
Life of this patent
Estimating the term…
Abstract
The present invention relates to a preheating process and a start-up process for the ammoxidation reaction. The preheating process or the start-up process at least includes the step of heating the catalyst bed in the ammoxidation reactor while controlling the reactor operation linear speed to 0.03-0.15 m/s. The start-up process of the present invention has the advantages such as the significantly reduced launch time compared with the prior art and the operation safety.
Claims51
A preheating process for ammoxidation reaction, comprising:
- feeding a heating medium into an ammoxidation reactor to heat a catalyst bed in the ammoxidation reactor at a linear velocity of 0.03-0.15 m/s, and/or, an input amount of the heating medium of 54-276 Nm3/h/m2 .
A start-up process for ammoxidation reaction, comprising:
- (1) heating a catalyst bed in an ammoxidation reactor with an oxygen-containing gas at a reactor operation linear velocity of 0.03-0.15 m/s, and/or, an input amount of 54-276 Nm3/h/m2 ;
- (2) continuously inputting ammonia gas to the ammoxidation reactor;
- (3) continuously inputting an ammoxidation substrate to the ammoxidation reactor;
- and
- (4) optionally, adjusting input amounts of the oxygen-containing gas, the ammonia gas, and the ammoxidation substrate to the ammoxidation reactor to respective predetermined values thereof.
A start-up process for the ammoxidation reaction, which comprising:
- (1) heating a catalyst bed in an ammoxidation reactor with an oxygen-containing gas;
- (2) continuously inputting an ammonia gas to the ammoxidation reactor;
- (3) continuously inputting an ammoxidation substrate to the ammoxidation reactor;
- and
- (4) adjusting the respective input amounts of the oxygen-containing gas, the ammonia gas, and the ammoxidation substrate to the ammoxidation reactor to respective predetermined values thereof,
- wherein the reactor operation linear velocity of the oxygen-containing gas in the step (1) is 0.03-0.15 m/s, the reactor operation linear velocity in the step (2) is 0.04-0.18 m/s, and the reactor operation linear velocity in the step (3) 0.04-0.32 m/s, and the reactor operation linear velocity in the step (4) respectively is 0.5-1.2 m/s.
Dependencies are inferred from the claim text.