Aroma treatment of bio-based diols
Publication Date: 2015-Jun-02
The IP.com Prior Art Database
To remove strong or unwanted aroma from diols such as 1,4 butanediol the diols are incubated with adsorbents such as activated carbon
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Aroma treatment of bio‐based diols
Diols are chemical compounds containing two hydroxyl groups (-OH groups), e.g. ethylene glycol, 1,3‐ propanediol, 1,4‐butanediol, 2,3‐butanediol, 1,5‐pentanediol or 1,6‐hexanediol. These compounds are intermediate chemicals valuable for a wide variety of applications including plastics, polyesters, biodegradable plastics, films, electronics and automotive parts.
Currently, the vast majority of intermediate chemicals are ultimately synthesized with petro‐chemically‐ derived raw materials (raw materials obtained from petro chemistry (crude oil)). Due to the decline of world oil reserve and/or the need to improve the carbon footprint of materials, many efforts have been made towards the complete or partial replacement of petrochemical‐derived raw material by raw material coming from biologically based materials (bio‐materials). Additionally, recent publications indicate this raw material change, allowing large scale access to raw bio‐material for the production of intermediate chemicals.
For example, monoethylene glycol can be obtained from a bio‐material. Such a bio‐material can be obtained from ethanol (bio‐ethanol) produced from renewable bio‐materials. Using classical chemical methods, the bio‐ethanol can be transformed into different chemical derivatives including bio‐ethylene and bio‐ethylene oxide. Bio‐ethylene oxide is further hydrated to obtain the desired monoethylene glycol. The bio‐materials, from which monoethylene glycol can be synthesized, can originate from a variety of feedstocks, such as bagasse, barley, cassava, corn, cotton, fruit, grain, hemp, kenaf, miscanthus, molasses, potatoes, sorghum, stover, straw, sugar beet, sugar cane, sunflower, sweet potatoes, switchgrass, wheat, other biomass as well as plant waste like saw dust, natural fibres, cellulosics, lignocellulosics, hemicelluloses, etc. The basic steps to produce bio‐ethanol from one of these bio‐materials are extraction of glucose from the feedstock, fermentation of the glucose using yeast (microbial) and distillation of bio‐ethanol. Some crops require saccharification or hydrolysis of carbohydrates such as starch and cellulose into sugars using enzymes prior to the fermentation.
Another example is bio‐based 1,4‐butanediol (BDO), which can be obtained through multiple processes: such as starting from furfural, the chemical conversion into furan and its hydrogenation in p...