Start-up method for reaction-regeneration unit used to prepare light olefins from methanol

US9233350B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC · CN

Inventors

• Guozhen Qi · Shanghai, CN
• Siqing Zhong · Shanghai, CN
• Zhinan Yu · Shanghai, CN
• Yongming Jin · Shanghai, CN

Key dates

• Filing date: Jan 8, 2013
• Grant date: Jan 12, 2016
• Expiry date: Aug 17, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J8/26
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention provides a start-up method for a reaction-regeneration unit for preparing light olefins from methanol, which comprises: (a) heating a regenerator with an auxiliary combustion chamber and a reactor with a start-up furnace; (b) charging a catalyst into the regenerator and reactor; (c) closing a spent catalyst slide valve and a regenerated catalyst slide valve after the reactor reaches about 350° C. or more; (d) feeding methanol to the reactor after the dense phase stage of the regenerator reaches about 350° C. or more; (e) opening the spent catalyst slide valve and introducing a carbon deposited catalyst from the reactor to the regenerator after the dense phase stage reaches about 400° C. or more and the average amount of carbon deposits on the catalyst in the reactor reaches about 2.5% or more; (f) raising the regenerator to above about 580° C.; and (g) stopping the start-up furnace and auxiliary combustion chamber.