According to GlobalData’s company profile on Coca-Cola, Artificial sweetners was a key innovation area identified from patents. Coca-Cola's grant share as of September 2023 was 52%. Grant share is based on the ratio of number of grants to total number of patents.

Method for refining bio-based crude ethylene glycol

A recently filed patent (Publication Number: US20230295064A1) describes a method for refining bio-based crude ethylene glycol. The method involves diluting the crude ethylene glycol with water to achieve a concentration of 1-95 wt %, preferably 20-90 wt %, and passing it through an adsorption bed filled with macroporous adsorption resins and an optional ion exchange resin. This process results in a purified ethylene glycol aqueous solution, which is then dehydrated to obtain ethylene glycol.

The patent also mentions an ultraviolet lamp pretreatment process for the bio-based crude ethylene glycol. The crude ethylene glycol is subjected to ultraviolet light irradiation at a wavelength of not less than 100 nm, preferably not less than 180 nm, and more preferably in the range of 180-350 nm. The pretreatment process involves introducing the crude ethylene glycol into a container containing an ultraviolet lamp and maintaining it at a temperature of 0-170° C., preferably 10-120° C., and more preferably 10-50° C., for a certain duration.

The macroporous adsorption resin used in the method contains styrene and/or divinylbenzene as the backbone, with a specific surface area greater than 800 m2/g. The ion exchange resin is a weakly basic anion exchange resin that contains primary amine, secondary amine, and/or tertiary amine groups on its surface.

The bio-based crude ethylene glycol used in the method is prepared from biomass and may contain butanediol, pentanediol, and hexanediol in addition to ethylene glycol. It may also contain other compounds with specific molecular formulas. The composition of the bio-based crude ethylene glycol typically includes a high percentage of ethylene glycol, with small amounts of butanediol, pentanediol, and hexanediol.

The dehydration of the purified ethylene glycol aqueous solution is achieved through rectification.

Additionally, the patent specifies that the ultraviolet transmittance of the bio-based crude ethylene glycol at certain wavelengths should meet the requirements for the premium grade product of polyester grade ethylene glycol.

Overall, this patent describes a method for refining bio-based crude ethylene glycol using dilution, adsorption, and dehydration processes. The inclusion of an ultraviolet lamp pretreatment process and the use of specific macroporous adsorption and ion exchange resins contribute to the purification of the ethylene glycol.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.