Caffeine Waste Activated Carbon Regeneration Technology R & D Record
According to China Drying News, a pile of black waste charcoal has been subtly separated into two black and white precious resources: white is caffeine and black is regenerated activated carbon. Over the past year, Shandong Xinhua Pharmaceutical Co., Ltd. has achieved nearly 20 million yuan in economic benefits through the recycling of caffeine. At the same time, the amount of new charcoal has been reduced by more than 1,000 tons after the recycling of activated carbon, which has saved costs by more than 600 million yuan and reduced carbon dioxide emissions by more than 4,000 tons. The waste activated carbon treatment cost more than 3 million yuan, which is a total of 30 million yuan for Xinhua Pharmaceutical. This technology is a two-stage gradient heating continuous recovery caffeine and activated carbon regeneration integrated resource technology developed by Professor Zhu Zhaoyou of Qingdao University of Science and Technology. This project has already obtained 3 invention patents, and also won the silver prize at the 7th International Invention Fair and the International Teaching New Instrument and New Equipment Exhibition. Black and white confused, "Baby" into waste Caffeine is the most commonly used psychotropic drug in the world and its price is around 3500 yuan/kg. Xinhua Pharmaceutical used activated carbon to remove colored impurities during the caffeine production process. During this process, part of the caffeine was also adsorbed by activated carbon, and the amount of absorbed caffeine accounted for about 28% of the mass of wet coal. In the past, companies had used solvent regeneration to treat activated carbon. However, due to the high toxicity of the extractant chloroform, it caused great harm to workers, and chloroform was volatile and produced a large amount of losses in the production process. Prof. Zhu said that the amount of activated carbon used in China exceeds 800,000 tons. It is mainly used in the production of pharmaceuticals and fine chemicals. A large amount of waste activated carbon will be produced each year. It is urgent to find a more economical and environmentally friendly method of regeneration instead of the original technology. Waste activated carbon belongs to the state's hazardous waste, causing serious impact on the environment and even the human body. The non-resource treatment cost of waste activated carbon is high. The use of traditional incineration methods to process only waste activated carbon in Shandong Province requires a cost of 600 million yuan each year. It also increases carbon dioxide, nitrogen oxides, sulfur oxides and other toxic and harmful gases, and pollutes the environment. In addition, traditional incineration treatment methods cannot effectively recover valuable organics that are adsorbed on waste activated carbon, resulting in waste of resources. Skillful magic, waste charcoal "Taobao" How to extract white caffeine in black activated charcoal? In the face of the problems presented by enterprises, Prof. Zhu Zhaoyou said that he must find a way to get these "silver" out and let waste activated carbon become a treasure. Based on the characteristics of easy sublimation of caffeine, they activated the activated carbon to a certain temperature, fed a carrier gas, sublimated and desorbed caffeine, collected the caffeine by an appropriate method, and took full advantage of the high regeneration efficiency of the high-temperature heat regeneration method. With the advantages of short regeneration time and little choice for adsorbate, two-stage gradient heating technology for continuous recovery of caffeine and activated carbon regeneration has been developed. This technology can not only purify and trap organics in activated carbon, but also remove impurities such as pigments, increase the regeneration rate of activated carbon, and achieve continuous industrial production. Black and white, dual resource The integrated recycling technology for activated charcoal with activated caffeine waste achieves the goal of efficient recovery of organic matter and regeneration of spent activated carbon through the effective separation of multi-component substances loaded on spent activated carbon, and solves the problem of toxicity caused by traditional solvent regeneration. , Environmental pollution, and low availability of effective resources. Industrial practice has shown that the caffeine capture rate of caffeine-laden activated carbon regeneration technology is ≥99%, and the regeneration rate of spent activated carbon is ≥98%. As of December 14 this year, Xinhua Pharmaceutical's production equipment using this technology has been running smoothly for one year, with an overall profit of over 30 million yuan. Caffeine waste activated carbon regeneration technology not only solves the environmental pollution and waste of resources caused by the waste activated carbon incineration in the pharmaceutical and fine chemicals industries, but also can be applied to similar areas of high efficiency recycling of solid waste in the process industry. Marketing prospects. Prof. Zhu Zhaoyou said happily: “I have studied the chemical industry's “three wastes†for many years, and the greatest experience during this period is that we not only effectively govern the 'three wastes' but also extract the 'gold, silver and silver' from them. In these years, we were in the 'three wastes' "Many corporate projects were completed during the governance process, which solved practical problems for the company. 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