Nissui has filed a patent for a method of producing highly unsaturated fatty acids or ethyl esters with reduced levels of environmental pollutants. The method involves removing pollutants from a feedstock oil, esterifying the fatty acids, and refining the product. The patent claims that the concentration of the ethyl ester in the fatty acid esters is at least 80%. GlobalData’s report on Nissui gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Nissui, nanoemulsion cosmetics was a key innovation area identified from patents. Nissui's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230183165A1) describes a method for producing highly unsaturated fatty acids or highly unsaturated fatty acid ethyl esters with reduced levels of polychlorinated dibenzoparadioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and coplanar PCBs (Co-PCBs). The method involves several steps to achieve this reduction.
Firstly, the method involves removing free fatty acids and environmental pollutants from a feedstock oil containing highly unsaturated fatty acids through thin-film distillation. This process helps eliminate unwanted contaminants from the oil.
Next, the highly unsaturated fatty acids present in the oil are ethyl esterified, converting them into highly unsaturated fatty acid ethyl esters. This step further refines the product.
The refined product from the previous step is then subjected to rectification and column chromatography to further purify it. The concentration of the highly unsaturated fatty acid ethyl ester in the sum of fatty acid ethyl esters is required to be at least 80 area percent.
Additionally, the method claims to reduce the amount of brominated flame retardants in the highly unsaturated fatty acid or ethyl ester.
The feedstock oil used in this method can be sourced from various sources such as fish oil, krill oil, marine mammal oil, or microorganism oil.
The thin-film distillation process is carried out at a temperature range of 200-270°C, a pressure of 5 Pa or lower, and a flow rate of 20-200 (kg/h)/m2. The distillation can be either molecular distillation or short path distillation.
Rectification, a process of separating components based on their boiling points, is performed in three or more distillation columns.
The refining process also involves column chromatography of reverse-phase distribution type.
The concentration of the highly unsaturated fatty acid ethyl ester in the sum of fatty acid ethyl esters is required to be at least 85 area percent, but can also be at least 90 area percent or even at least 95 area percent.
Lastly, the method includes an optional step of hydrolyzing the highly unsaturated fatty acid ethyl ester to produce the highly unsaturated fatty acid.
Overall, this patent describes a method for producing highly unsaturated fatty acids or ethyl esters with reduced levels of harmful contaminants, such as PCDDs, PCDFs, Co-PCBs, and brominated flame retardants. The method involves multiple refining steps, including thin-film distillation, ethyl esterification, rectification, and column chromatography. The resulting product has a high concentration of the desired fatty acid ethyl ester.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
