Desulfurizer for conversion and absorption of high-concentration carbonyl sulfide and a desulfurizer for catalytic conversion and absorption of carbon disulfide and their preparation methods

US10376836B2 · kind B2 · utility

Assignee

• BEIJING SJ ENVIRONMENTAL PROTECTION AND NEW MATERIAL CO., LTD. · CN

Inventors

• Liying Li · Shanghai, CN
• Wenwen Song · Beijing, CN
• Wenjun Mao · Beijing, CN
• Zhimin Zhang · Beijing, CN
• Boshu Liu · Cambridge, US
• Zhenyi Liu · Beijing, CN

Key dates

• Filing date: Dec 30, 2014
• Grant date: Aug 13, 2019
• Expiry date: Jan 1, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J37/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Provided is a high-concentration carbonyl sulfide conversion-absorption type desulfurizer for use at medium-low temperature and preparation method thereof. The desulfurizer comprises 50%-75% magnetic iron oxide red (Fe21.333O32), 5%-10% alkali metal oxide (K2O), 5-35% anatase TiO2, and 5-10% shaping binder. The method of preparing the desulfurizer comprises: uniformly mixing a metatitanic acid prepared using ferrous sulfate recycled as a by-product from titanium dioxide production with K2CO3, calcining to activate at 500° C.-700° C., mixing with the magnetic iron oxide red and binder, roll molding at room temperature to form balls which are dried at 100° C.-150° C. to obtain the desulfurizer. The desulfurizer has a hydrolysis conversion of carbonyl sulfide higher than 99%, and has a higher sulfur capacity more than 25%.