Sulfonatocalixarene tanning agent for leather tanning and preparation method therefor

US9970069B2 · kind B2 · utility

Assignee

• SHAANXI UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

• Jianzhong Ma · Tuji, CN
• Yongxiang Zhou · Hubei, CN
• Dangge Gao · Xi'an, CN
• Panpan Zhang · Beijing, CN
• Bin Lv · Longbeilingcun, CN

Key dates

• Filing date: Jun 18, 2015
• Grant date: May 15, 2018
• Expiry date: Jun 18, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G8/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A sulfonatocalixarene tanning agent for leather tanning and a preparation method comprises: using resorcinol and aldehyde monomers as raw materials for the tanning agent; adding an ethanol solution into the resorcinol, dropwise adding an inorganic strong acid catalyst and aldehyde derivatives, heating to react, cooling, carrying out suction filtration, repeatedly washing with ethanol and distilled water, and drying to obtain resorcinol calixarene; and weighing the resorcinol calixarene, and adding a sulfonating agent to react, thereby obtaining a sulfonatocalixarene tanning agent aqueous solution.