MTO process based on MeAPO molecular sieves combined with an OCP process to make olefins

US8362183B2 · kind B2 · utility

Assignee

• Total Petrochemicals Research Feluy · BE

Inventors

• Walter Vermeiren · Houthalen-Helchteren, BE
• Nikolai Nesterenko · Nivelles, BE

Key dates

• Filing date: Mar 10, 2008
• Grant date: Jan 29, 2013
• Expiry date: Dec 4, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/40
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process to make light olefins from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock is disclosed. The process includes contacting the feedstock in a primary reactor with a catalyst that includes a metalloaluminophosphate (MeAPO) molecular sieve to form a first reactor effluent that includes a light olefins and a heavy hydrocarbon fraction. The process further includes separating the light olefins from the heavy hydrocarbon fraction and contacting the heavy hydrocarbon fraction in a second reactor to convert the heavy hydrocarbon fraction to light olefins. The MeAPO molecular sieve is expressed by the formula HxMeyAlzPkO2 where y+z+k=1, x is less than or equal to y, y is from 0.0008 to 0.4, z is from 0.25 to 0.67, and k is from 0.2 to 0.67. The MeAPO molecular sieve has a predominantly plate crystal morphology where the width divided by the thickness is greater than or equal to 10.