US12571015USUSPTO Grant XML

Process for producing alternan-oligosaccharide

A process (S 1 ) for producing alternan-oligosaccharide ( 8 ), comprising contacting in a reactor ( 11 ) sucrose ( 9 ) with a catalytically effective amount of alternansucrase enzyme ( 13 ) and acceptor molecules ( 12 ), wherein the alternansucrase enzyme ( 13 ) and acceptor molecules ( 12 ) are present in the reactor ( 11 ) in an aqueous liquid ( 4 ) and the sucrose ( 9 ) is continuously or half-continuously fed to the reactor ( 11 ), and wherein the sucrose ( 9 ) and the acceptor molecules ( 12 ) are converted to alternan-oligosaccharide ( 8 ), and fructose ( 6 ) is formed as a by-product, continuously or half-continuously removing at least a part of the fructose ( 6 ) from the reactor ( 11 ) by membrane filtration ( 17 ).

Patent

Brief

Patent brief

Problem

How can microplastics and similar contaminants be removed from wastewater?

Novelty

Membrane filtration is reinforced by front-page matches on membrane filtration.

Uses

Wastewater treatment, Industrial effluent, Water cleanup

Assignee

Societe des Produits Nestle S.A.

Published

Mar 10, 2026

Inventors

Dominik Terfehr, Ralf Feldmann, Michael Puls

Domain

Environmental systems

Plain-English summary

Problem

How can microplastics and similar contaminants be removed from wastewater?

Solution

process (S 1 ) for producing alternan-oligosaccharide ( 8 ), comprising contacting in a reactor ( 11 ) sucrose ( 9 ) with a catalytically effective amount of alternansucrase enzyme ( 13 ) and acceptor molecules ( 12 ), wherein the alternansucrase enzyme ( 13 ) and acceptor molecules ( 12 ) are present in the reactor ( 11 ) in an aqueous liquid ( 4 ) and the sucrose ( 9 ) is continuously or half-continuously fed to the reactor ( 11 ), and wherein the sucrose ( 9 ) and the acceptor molecules ( 12 ) are converted to alternan-oligosaccharide ( 8 ), and fructose ( 6 ) is formed as a by-product, continuously or half-continuously removing at least a part of the fructose ( 6 ) from the reactor ( 11 ) by membrane filtration ( 17 ).

Key novelty

Membrane filtration is reinforced by front-page matches on membrane filtration.

Applications

Wastewater treatmentIndustrial effluentWater cleanup

Relevant search intents

membrane filtration

Claims preview

1 . A process for producing alternan-oligosaccharide, comprising contacting in a stirred tank reactor sucrose with a catalytically effective amount of alternansucrase enzyme and acceptor molecules with stirring, wherein the alternansucrase enzyme and acceptor molecules are present in the reactor in an aqueous liquid, wherein the alternansucrase enzyme is dissolved, emulsified, or suspended in the aqueous liquid, and the sucrose is continuously or half-continuously fed to the reactor, and wherein the sucrose and the acceptor molecules are converted to alternan-oligosaccharide, and fructose is formed as a by-product, continuously or half-continuously removing at least a part of the fructose and at least a part of leucrose, formed as a by product, from the reactor by membrane filtration, wherein removing of at least a part of the fructose and at least a part of leucrose comprises continuously or half-continuously circulating the content of the reactor through a device comprising a membrane and contacting the content of the reactor with the membrane, wherein at least a portion of the fructose at least a part of the leucrose and a portion of the aqueous liquid pass the membrane, and wherein a remainder, comprising the alternan-oligosaccharide, is returned to the reactor, wherein the average degree of polymerization DPw of the alternan-oligosaccharide is greater than 14. 2 . The process of claim 1 , wherein the membrane filtration is a diafiltration. 3 . The process of claim 2 , wherein further alternansucrase enzyme is fed to the reactor.

Linked approaches

Membrane filtration

Fine filtration methods for capturing microplastics and fine contaminants.

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