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Liaoning Shixing Co., Ltd. is a fine chemical company that produces pharmaceutical intermediates. It annually produces 16,000 tons of p-aminophenol, ranking first in Asia and second in the world. The products are sold nationwide and exported to more than 10 countries and regions such as Europe, Africa, Southeast Asia, Japan and China Taiwan. The annual sales of para-aminophenol products rank first in the world. In order to speed up the development, the company has developed the production of para-aminophenol, a leading product, in 3 years to 30,000 tons/year, which has become the development target of the largest production plant in the world.
Nitrochlorobenzene is an upstream raw material for the production of p-aminophenol. The existing 4,500 tons/year nitrochlorobenzene plant of the company is far from meeting the needs of development. The company decided to reconstruct the equipment and transform it. The scale of nitrochlorobenzene production will reach 90,000 tons/year, and the current phase of the 45,000 tons/year project has been completed and trial production has been successful. After the completion of the new nitrochlorobenzene plant, the cost of the main product will be reduced, saving an annual capital of 6 million yuan, which will add stamina to the product's expansion into a larger international market.
It is understood that the new device has changed the past two towers two crystallization method, using a single tower crystallization, reducing equipment investment, and shorten the crystallization separation time of nearly 10 hours, an increase of 10% of the work efficiency. The vacuum system of the rectification tower adopts the production raw material as the circulating medium, which not only achieves the vacuum required by the work, but also eliminates the pollution of the exhaust gas and reduces the material loss.
The first phase of the nitrochlorinated benzene plant renovation project of Liaoning Shixing Pharmaceutical Co., Ltd. was successful in trial production one day ago, which marks another step toward the goal of building the world's largest para-aminophenol production base in three years.