Waste Oil Transformation

According to the major media coverage, an international flight with our own R & D bio aviation kerosene has landed steadily in Chicago, us. What attracts people's attention is that the bio aviation coal that it has added is raw material, which is commonly used as waste oil.

The so-called "gutter oil" is the general name of all kinds of inferior oil. Long term food will cause cancer. In our country, a restaurant has been reported to have been condemned by the whole society to make use of the oil in order to earn small and cheap. Although the gutter oil is not edible, the gutter oil is not a useless rubbish. In recent years, some foreign manufacturers have quietly bought this kind of poor oil, and they are still very busy. So what do they do? Of course, they are not for eating. They are said to buy cooking oil to extract biodiesel.

It is not easy to master the trench oil into biodiesel technology, and it is not easy to convert the gutter oil into the aircraft's bio kerosene. It is said that only 4 countries have this technology in the world, the other three countries are the United States, France and Finland, and the central countries are the fourth own independent biological aviation coal. The country of research and development of production technology. How can the waste oil be converted into aviation kerosene? There are the contributions of the tungstate heteropoly acid catalyst.

In order to convert catering waste oil or other industrial blends into aviation kerosene, a fat conversion process is required to generate renewable energy instead of petrochemical diesel. The principle is simple but the process is complex. The traditional production route is the esterification of fatty acids. Or transesterification of triglycerides and short-chain alcohols under acid or base catalysis.

In the process of ester conversion, the most important part is the selection of catalysts. In recent years, traditional inorganic acid and alkali catalysts are faced with problems such as strong corrosiveness, non-renewability, and saponification reaction, which are contrary to the environmental protection of biodiesel. The original intention was gradually eliminated and replaced by a new environmentally friendly and efficient tungsten heteropoly acid catalyst.

Heteropoly acid is a kind of nanostructured inorganic cluster, which has Keggin structure. Because of its structure stability and both acidity and oxidation-reduction, it can be used to design different functional catalysts. Its superior catalytic performance is mainly reflected in the fields of petrochemical industry, sewage treatment and light industry. At present, tungstic heteropoly acid and tungstic heteropoly acid are the most widely used tungsten heteropoly acid catalysts.

In the petrochemical field, heteropoly tungstic acid can replace the traditional catalyst, its catalytic activity is 100-1000 times of the inorganic acid, can be catalyzed under very mild conditions, and it is not easy to take side reaction. Heteropoly acid has higher catalytic activity than molybdenum heteropoly acid, because the acidity of Heteropoly tungstic acid is stronger. The reaction of Heteropoly tungstic acid as an acid catalyst can be catalyzed by esterification and vinegar exchange, nitrification, hydrocarbon hydration, dealkylation, epoxide etherification, and almost most of the petrochemical industry. The chemical products that need the catalyst can be catalyzed by tungstic acid, and are innocuous, harmless, clean and environmentally friendly, so it is not surprising to use it to convert the gutter oil.

At present, China's independent research and development of biological aeronautical coal represents the highest level of international biomass fuel research and development. Bio aviation kerosene is low carbon environmental protection and greatly reduces greenhouse gas emissions. At the same time, it may also change the distorted direction of the waste oil to the table, and become the green channel of the waste oil in the ditch. (Chinatungsten Online: Weiping)

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