Relying on the technological expertise of organizations such as Tsinghua University and the Chinese Academy of Sciences, we are committed to the industrialization of new materials and fine chemicals. Beijing Long Green Valley has successfully developed the world-leading technological process to produce mono-chlorophthalic anhydride, solving the raw materials bottle-neck in polyimide industrialization. The success plays an important role in the advanced materials improvement for human beings.

Beijing Long Green Valley was established in September, 2010 with registered capital of 10 million Yuan. There are 120 employees in the company, including 13 managers, 24 research staff and 83 working in the manufacturing plants. In addition to our current breakthroughs, the company has made efforts to strengthen its R&D by recruiting several professors from Tsinghua University and the Chinese Academy of Sciences. At the same time, advanced laboratories were built to help the company develop innovative processes for new products.

Our main products include 3-chlorophthalic anhydride and 4-chlorophthalic anhydride. Our production process can achieve a purity of 99.9% for 4-chlorophthalic anhydride and 98% for 3-chlorophthalic anhydride. The quality of our products is reliable and quantity is stable, samples in kilograms can be provided at any time. We are aware of another international company which is also specialized in 4-chlorophthalic anhydride production, but it can only achieve 80% purity, and the company can not produce 3-chlorophthalic anhydride. Compared to their products, our products will be very competitive not only in price but also in purity.