Methods of isolating urea, urea compositions and methods for producing the same

Urea is readily isolated and recovered from natural products. Urea can be brought into the permeate side by treating a urea-containing fraction extracted from natural products or sewage containing urea, with a nanofiltration (NF) membrane or reverse osmotic (RO) membrane. A milk-derived composition...

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Bibliographic Details
Main Authors YAMAMOTO HARUYOSHI, SERIZAWA ATSUSHI, MOTSUCHI WATARU, KOTANI MASANORI, YAMANE YORIKO, MORITA MINORU
Format Patent
LanguageEnglish
Published 06.12.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
DAIRY PRODUCTS, e.g. MILK, BUTTER, CHEESE
FOODS OR FOODSTUFFS
HUMAN NECESSITIES
MAKING THEREOF
METALLURGY
MILK OR CHEESE SUBSTITUTES
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
TRANSPORTING
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Summary:Urea is readily isolated and recovered from natural products. Urea can be brought into the permeate side by treating a urea-containing fraction extracted from natural products or sewage containing urea, with a nanofiltration (NF) membrane or reverse osmotic (RO) membrane. A milk-derived composition containing urea at a level of more than 0.2% of the total solids can be obtained by treating natural products such as milk or milk materials with an NF membrane or RO membrane to bring a fraction containing urea into the permeate side.
Bibliography:Application Number: US20010866227