I D
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Nanofiltration Toray Industries, Inc. (Tokyo, Japan; www.toray.com) has created what…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment PDF

D,L-methionine production via the carbonate process

By Chemical Engineering |

Methionine is an essential amino acid that is not synthesized by animals, so it must be obtained from their diets. Synthetic methionine is traditionally commercially available in two varieties: D,L-methionine (DLM), a racemic mixture of the two stereoisomers, and methionine hydroxy analog (MHA). For animal nutrition, the two are equivalent. Globally, 98% of methionine produced is used as an animal feed additive, especially in the poultry market. Methionine is also used in pharmaceuticals and cosmetics. The process In the process shown in Figure 1, DLM is obtained via the carbonate process from 3-methylthiopropionaldehyde (MMP) and hydrogen cyanide (HCN), without forming co-products. The process presented here is similar to one developed by Evonik Industries AG (Essen, Germany; www.evonik.com), and can be divided into four main areas: hydantoin production; hydantoin hydrolysis; DLM production and filtration; and drying. Hydantoin corresponds to the intermediate 5-(2-methylmercaptoethyl)-hydantoin generated in the process. FIGURE 1. D,L-methionine production via carbonate process Hydantoin production. MMP, HCN and an aqueous solution of carbon dioxide (CO2) and ammonia (NH3) are fed to the hydantoin primary reactor. A gas stream containing…
Related Content
Controlling Dust through Pelletizing
Tumble-growth agglomeration can reduce dust in solids-handling processes. Here’s how it works Handling and processing bulk solids appears in nearly…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
How separation processes profit from Industrial Internet of Things (IIoT) solutions
Up to 80% increased production rates in plastic recycling
Higher throughput and purity in sodium bicarbonate production with up to 15% less energy consumption
Help feeding nations with chemical filtering technologies
Not at the forefront of Industry 4.0?

View More

Live chat by BoldChat