Air Products has signed a contract with Anhui Sanan OptoElectronics to build two on-site ammonia (NH3) plants at Sanan's new high brightness light emitting diode (LED) manufacturing facility in the Wuhu Economic and Technological Development Area of the Anhui Province, China.

Air Products claims that these new facilities, which will supply ammonia to Sanan, will be the first and largest on-site specialty gas plants in the world.

Each plant Air Products is building will be capable of supplying 2,000 metric tons per year.

Large volumes of NH3 are needed to provide the nitrogen source for the gallium nitride layers used in the manufacture of LEDs.

Air Products currently supplies Sanan OptoElectronics’ two other LED facilities in China.

Air Products Electronics vice president and general manager Corning Painter said that Sanan OptoElectronics chose Air Products for its high purity ammonia needs at Anhui, where the company provides ammonia with the purity at the source necessary for LED production.