Orient Success International Groups Are a front runner in chemical industry. Headquarters in Hongkong, the company is an energetic company focusing on worldwide customers with quality product at competitive price chemical industry. With many years effort, our groups have been developing very rapidly. we are specialized in manufacturing molecular sieve and the series of the silicon compound, the relative products including molecular sieve 3a, 4a, 5a, psa-5a, ig-3a, xh-9, sodium silicate, sodium ...