This year, we will also start with the research and development of large-scale production technology of plastic and chemical materials, HOOC - (CH2) 8-cooh, and the enthusiasm for raw material development will be even higher. COOC (HOOC - (CH2) 8-cooh) is a kind of substance used in many industries, including plasticizer, lubricant, cosmetics and plastic production. At present, it is produced by high temperature decomposition process of castor oil. However, such chemical engineering is accompanied by high-temperature synthesis engineering. In this process, there are many problems, such as consuming a lot of sulfuric acid, discharging wastewater containing sodium sulfate, causing serious environmental pollution. The production capacity of sebacic acid was improved by the gene operation of Candida tropicalis and the gene amplification of ω - oxidation reaction. In addition, the conditions of temperature, pH, dissolved oxygen and feed rate were optimized to produce the best sebacic acid (98.3 g / L and 98% productivity) in the world. The possibility of industrial application of the results of this study was verified by the successful reproduction of sebacic acid production process constructed in the laboratory on a pilot scale (50L medium) by the research team.
In addition, our research team has cooperated with Korean enterprises, such as Aijing Oil Chemical Co., Ltd., Lotte Chemical Co., Ltd. and small lab, to separate and refine sebacic acid produced by biological process with high purity, and successfully synthesized nylon 610 (nylon 610) by polymerization process. In December last year, we developed a technology for the production of pharmaceutical and cosmetic raw materials. Dr. Kim huitaek, Ju jeongchan and cha hyeongil, Professor Kim gyeongheon of Koryo University and Professor Park sijae of Lihua women's University jointly developed the technology of transforming pet into pharmaceutical and plastic raw materials, the Korean Institute of chemistry said on Thursday. This is a kind of technology that can decompose the main component of the plastic bottle, polyethylene dicarboxylate (PET), and transform it into useful material in biology. The team designed a strategy of using water to decompose pet into unit molecules, and then using microorganisms to transform pet into useful materials. First of all, pet was decomposed into terephthalic acid and ethylene glycol by reaction with water at 230 ° C. the recovery was 99.9%. Subsequently, terephthalic acid and glycol were successfully transformed into useful materials by microorganisms. Terephthalic acid was transformed into gallate (92.5%), catechol (90.1%), pyrogallol (20.8%), hexadiene diacid (85.4%), vanillic acid (29.4%), and glycol into glycolic acid (98.6%). Gallate and hexadiene diacid, vanillic acid, three phenol, glycolic acid are used in cosmetics, medicine, plastic raw materials and aromatic components.
The traditional methods are physical and chemical methods. The physical methods are mechanical crushing, cleaning, drying and other mechanical treatment and heat treatment to recover PET fiber and make new pet products. In the process of processing, the fiber length will become shorter and the quality will decline. In addition, the chemical method is to depolymerize pet into monomer or oligomer, because of high recovery cost and poor economy. Dr. Kim huitaek, Korean Institute of chemistry, explained: "this provides a clue for the raw material and material technology of waste plastics used to be waste in the past, and looks forward to the active development based on the recycling and material technology of waste plastics such as pet in the future." From this year, SBC will produce nano titanium dioxide, the core material of functional cosmetics such as sunscreen, for the first time in China, with an annual output of 240 tons. This technology has dramatically reduced the unit price, and the new independent R & D technology provides an opportunity to replace the products imported from Japan. Titanium dioxide is a necessary material for functional cosmetics or advanced electronic products such as OLED and MLCC. According to Euromonitor and other global market research institutions, if only considering the market size of sun protection products in South Korea rather than the world, it will also reach 4 trillion won.
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