The pyridine production technology based on catalytic materials involves the synthesis of pyridine and its methylpyridine derivatives from aldehydes and ammonia under the action of specialized catalysts. The catalysts are the core of the process, and their activity, selectivity, and lifetime directly determine the product distribution and operational economics. The supporting process covers aspects such as raw material composition, reaction temperature and pressure control, product distillation separation, and catalyst regeneration. Pyridine derivatives are important intermediates for the synthesis of pharmaceuticals, pesticides, and veterinary drugs. This technology has been industrialized and has a mature basis for industrial application, making it suitable for fine chemical enterprises with access to aldehyde raw materials to build or modify pyridine units. Services such as catalyst supply and selection, reaction process licensing, catalyst loading and regeneration guidance, distillation system configuration recommendations, commissioning guidance, and operation training are available.

The water washing-distillation technology for ammonia-containing waste gas recovery: After the ammonia-containing waste gas is filtered and pre-cooled, it enters a multi-stage countercurrent water absorption system to obtain 18% to 22% concentrated ammonia water; the ammonia water is sent to the distillation tower for heating and absorption, and the high-purity ammonia gas at the top of the tower is compressed and condensed to produce industrial liquid ammonia products; the absorption water is recycled, and the deammonization exhaust gas is treated with water after purification to meet emission standards. This technology combines waste gas treatment with product recovery, solving the ammonia emission problem and producing marketable liquid ammonia or ammonia water products, which is suitable for the treatment of ammonia-containing exhaust gas from coking, synthetic ammonia, urea, and nitric acid plants. The technology has been implemented in engineering applications and has a mature industrial operation base. It can provide services such as process package design, support for the design of the absorption and distillation tower system, recommendations for the selection of ammonia compression and liquefaction system equipment, ammonia safety protection schemes, driving guidance, and operation training.