Methods and compositions for prevention of fouling in caustic towers

US12173243B2 · kind B2 · utility

Assignee

• BL TECHNOLOGIES, INC. · US

Inventors

• Xiaofeng Tang · San Jose, US
• Guixi Zhang · Shanghai, CN
• Mike Hong · Cupertino, US
• Yongtao Shi · Shanghai, CN
• Chun-Jun Xu · Shanghai, CN
• Dengchao Yan · Shanghai, CN

Key dates

• Filing date: Dec 14, 2020
• Grant date: Dec 24, 2024
• Expiry date: Dec 14, 2040

Classification

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

Abstract

Methods and compositions for inhibiting carbonyl-based fouling of basic wash systems. The methods comprise contacting the hydrocarbon stream that is or will be subjected to such washing with water soluble or water dispersible copolymers comprising repeat units of 1) ethylenically unsaturated monomers such as acrylic acid with one or more 2) other repeat units such as alkyl acrylates, allyl ethers, ethoxylated allyl repeat units, etc. In other embodiments, a third repeat unit 3) is present and may comprise a hydrophobic moiety such as a styrene repeat unit. The compositions may be terpolymers comprising repeat units 1), 2), and 3).