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Cashew shells - a precious raw material source for the petrochemical industry in Binh Phuoc

Currently in Binh Phuoc province, the area of cashew trees ranks second after rubber trees. Products from the cashew tree are a source of export goods with great economic value such as cashew nuts and cashew wood. Cashew shells were previously mostly burned or thrown away, causing environmental pollution, but have now become a valuable source of raw materials for the petrochemical industry. Currently, Binh Phuoc province has about 150,000 hectares of cashew trees. Among them, the old Phuoc Long district has the largest area of cashew trees in the province, followed by Bu Dang and Bu Dop.

However, in the past few years, the area of cashew trees in the province has tended to decrease due to reasons such as Binh Phuoc implementing a policy of recovering illegally encroached forestry land, most of which is land area. cashew is grown. Previously, Binh Phuoc cashew trees mainly served the cashew nut processing industry for export. Due to the rich and abundant source of raw materials from cashew trees, not only products from cashew nuts but also taking advantage of tree trunks for wood, Binh Phuoc has established a number of businesses processing cashew wood into household wood products. export. Also from processing cashew nuts for export, a large amount of waste is generated from cashew shells after processing. This is a waste that most manufacturers have to burn, causing environmental pollution. In fact, for every kilogram of cashew nuts after removing the kernel, the shell accounts for about 60%. With Vietnam's current second largest cashew nut output, the volume of cashew shells discharged after processing in Binh Phuoc is very high.

Many cashew nut processing business owners said: This amount of waste cashew shells must be burned. There are also businesses that press cashew shells into blocks to use in furnaces. This is related to environmental pollution, however, Processing cashew shells is not simple due to complex technology and large investment, so few businesses do it and mainly burn it to destroy it. Faced with this situation, after learning how to process cashew shells in regional provinces at the end of 2009, a business in Binh Phuoc decided to invest in building a factory to produce refined products from nut shells. The thing is, LC Buffalo Co., Ltd. is located in Dong Phu district. After successfully researching the production of refined products such as refined oil, cardanol oil, coal, activated carbon and friction powder production with a capacity of 16,000 tons of products/year. The company has a scientific report on this process. The report shows that the process of producing refined oil from cashew shells, after purchasing, will go through a press to get crude oil.

The cashew shell residue will be molded into blocks to be sold to brick and tile kilns for use in furnaces. Crude oil after pressing will be processed through a filter tank to remove residue. Next, it is put into the reactor to separate the water, the remaining part is refined oil, from there the refined oil is put into a preheater to raise the temperature of the oil with a vacuum distillation tower to produce cardanol oil. When distilling, refined oil at high temperature will turn into vapor and condense into liquid at the bottom of the tower and then flow into the storage tank. The residue of cardanol oil during distillation will be produced as friction. Regarding the charcoal production process, activated carbon, cashew shells after being dried and burned with a heat transfer system create charcoal. Coal is put into a smokeless coal furnace and heat is provided from the preheater to heat the coal at a temperature of 850oC to form activated carbon... LC Buffalo company leader said: The production of refined products from cashew shells will not stop at refined oil, cardanol oil, coal, activated carbon and friction powder production but in the shell.

Cashew nuts contain substances that can produce anti-rust paint used in the ship industry, and special conductive glue in electronic components. These products are being tested by scientists and are sure to be successful. With new technology, cashew shells were once burned and now scientists and businesses are working to research and produce new products with positive applications for human life. LC Buffalo Co., Ltd. built a factory to produce refined oil, cardanol oil, coal, activated carbon and friction powder production in Dong Phu. When it comes into operation, it will be good news for cashew growers and cashew farmers. Cashew processing enterprises in Binh Phuoc in particular and provinces with large cashew growing areas in Vietnam in general. When these products are added, the value of the cashew tree will be enhanced, and cashew growers will feel more secure with this tree that is said to alleviate hunger and reduce poverty./..