The Greatwall Bio-chemical Engineering Co., Ltd.

The Greatwall Bio-Chemical Engineering Co., Ltd. was established in 1992 and makes four-carbon acids and their salts: L(+)-tartaric acid and tartrates, and L-malic acid and malates. The products listed here, calcium citrate malate, L-malic acid, sodium L-malate, L(+)-tartaric acid and potassium bitartrate, sit within those two families. The company states that it runs a closed-loop continuous process and holds more than three patents.

The works are at Huailai, in Zhangjiakou, Hebei, inside the Beijing, Tianjin and Hebei economic area, about 100 km from Beijing Capital Airport and 200 km from the port of Tianjin. Stated capacity is more than 9,000 tonnes a year across upwards of ten product types.

Production is certified to ISO and FSSC standards and holds an FDA registration together with Kosher and Halal certificates, and the company states that its products are made to exceed food safety requirements. Its stated technical priorities are atom economy, biotechnology and green chemistry.