Two sets of hydrogen compressor-expander units designed and developed by a subsidiary of Hangzhou Hangyang Group have been successfully commissioned at a Chinese petrochemical complex.

The units, commissioned at the new Shouguang Luqing Petrochemical Complex in July, are used in the cold box separation system of the 200,000 tonnes per annum (tpa) iso-butane hydrogen removal project of Luqing Petrochemical.

When hydrogen passes through the units, its pressure and temperature will drop substantially and quickly, which is part of the process to extract and synthesise the valuable polymer organic matters in LPG.

The expanders were designed and developed by Hangzhou Hangyang Expanders Company, the first of their kind by Hangyang and a Chinese company, according to a statement by the company. The successful commissioning of the units has ‘lifted the design and manufacturing capability of Hangyang to a new level’ and will alleviate the reliance on import products for such applications, it added.

China’s leading air separation plant (ASU) manufacturer and industrial gas company, Hangzhou Hangyang Co. Ltd recently welcomed a return to profitability in its interim results for 2015.

While the group’s profit plummeted by more than 40% in 2014 (over 2013), net profit attributable to the shareholders of the listed company in mid-2015 showed a substantial rebound of 33.5%. Net profit grew from RMB 45.9m (approx. $7.4m) in first-half 2014 to RMB 69.3m ($11.1m) in the first six months this year.