Daqing Petrochemical Complex Selects Ethylenediamine as Catalyst for Acetone Cyanohydrin Unit

Starting September 20, 2013 the No. 1 Polymer Plant of the Daqing Petrochemical Complex has been delivering acetone cyanohydrin product complying with the product quality standard, and the production unit runs smoothly along with its stabilized control over technical parameters. It is learned that the application of this technology, apart from saving a patent fee which would amount to tens of million RMB, can bring about an additional economic benefit of 780 thousand RMB.

Previously, this unit used to apply sodium hydroxide as the catalyst, which was neutralized by sulfuric acid as required by the production process scheme. During the production process, the sodium sulfate formed as the product of acid-base neutralization functioning as an impurity could block the piping and equipment so that the filters, the refining columns, the intermediate storage tanks and the finished product storage tanks should be regularly washed, resulting in increased energy consumption and materials loss. In order to tackle this problem, this plant management has eventually selected ethylene diamine catalyst to replace NaOH.