Dongying Haode Petroleum Technology Development Co., Ltd. is a professional supplier in adsorbent chemical, such as activated alumina, molecular sieve, activated clay, silica gel, etc. We own professional technical, production, and logistic service. We work for supplying every client good product, competitive price, best service. Our products are widely recognized and trusted by users. We welcome new and old customers from all walks of life to contact us for future business ...