Recovery of dimethylformamide and other solvents from process streams of manufacture of trichlorogalactosucrose
AssigneeV.B. Medicare Pvt. Ltd
InventorsRakesh Ratnam, Sundeep Aurora, n/a Subramaniyan
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Abstract
This invention comprises an improved process for recovery and purification of DMF from an aqueous process stream containing DMF with or without inorganic impurities, particularly from process stream of a process of manufacture of the high intensity sweetener Trichlorogalactosucrose, by adsorption on an adsorbent having selective affinity towards dimethylformamide, followed by elution in pure form by eluting by an appropriate eluent, including methanol.
Claims6
A process of recovery and purification of a tertiary amide from an aqueous liquid composition, the said composition comprising a tertiary amide, one or more of an aqueous component and with or without one or more of an inorganic impurity, the said process comprising steps of:
- a. contacting the said aqueous liquid composition with an adsorbent having a selective affinity towards the said tertiary amide,
- b. washing the said adsorbent free from impurities by washing with an appropriate wash solvent that shall not desorb the adsorbed tertiary amide,
- c. desorbing the adsorbed tertiary amide in a suitable solvent as an eluent and collecting it separately from the adsorbent,
- d. separating the said eluent from the desorbed tertiary amide using a separation method and recovering the said tertiary amide in a substantially pure form.
Dependencies are inferred from the claim text.