Agarose Bead Manufacturing With Washable Phosphate Ester Emulsifiers

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Solution Overview

Problem

Existing methods for manufacturing agarose beads lack effective emulsifiers that are easy to remove, environmentally friendly, and do not produce toxic leachables, affecting the size distribution and shape of the beads.

Innovation Solution

A method using a phosphate ester of an alkoxylated fatty alcohol as an emulsifier to stabilize the water-in-oil emulsion, allowing for well-dispersed, spherical beads with easy removal by water washing, and avoiding alkyl phenol derivatives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If conventional emulsifiers are used to stabilize the W/O emulsion, then the emulsion stability is improved, but the emulsifier removal becomes difficult and toxic leachables are generated

Engineering Contradiction:

Improveemulsion stabilityVSAvoidemulsifier removal ease

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent changes the chemical parameters of the emulsifier by selecting specific phosphate esters with particular molecular structures (alkoxylated fatty alcohols with specific chain lengths and alkoxy groups) that provide optimal balance between emulsion stability and water solubility for easy removal

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite emulsifier systems combining phosphate esters with specific auxiliary substances to achieve both stable emulsion formation and easy removal characteristics, creating a multi-component system that addresses both requirements

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If conventional emulsifiers are used to stabilize the W/O emulsion, then the emulsion stability is improved, but environmentally friendly properties are compromised due to toxic leachables

Engineering Contradiction:

Improveemulsion stabilityVSAvoidtoxic leachables

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the chemical composition parameters by selecting phosphate esters of alkoxylated fatty alcohols that decompose into non-toxic products, specifically avoiding conventional emulsifiers that generate harmful leachables while maintaining emulsion stability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs biodegradable phosphate ester emulsifiers that are environmentally benign and break down into harmless substances, replacing persistent toxic emulsifiers with shorter-lived, eco-friendly alternatives

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Temperature

If the cooling process is performed to solidify the agarose beads, then the gelation is achieved, but bead aggregation occurs reducing sphericity

Engineering Contradiction:

Improvegelation temperatureVSAvoidbead sphericity

Core Design Contradiction:

TemperatureVSShape

Solution Approach 1:

The patent introduces a specific emulsifier system (phosphate esters of alkoxylated fatty alcohols) that acts as a mediator during the cooling and gelation process, preventing direct contact and aggregation between forming beads while allowing controlled solidification into spherical shapes

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent optimizes the cooling rate and temperature profile parameters during gelation, combined with the emulsifier system, to achieve controlled solidification that maintains bead sphericity while preventing aggregation

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250249433A1Method of Manufacturing Agar or Agarose Beads

Publication Date: 2025.08.07 CYTIVA BIOPROCESS R&D AB

AI summary

The invention discloses method for manufacturing agar or agarose beads, comprising the steps of:a) providing a water phase comprising an aqueous solution of agar or agarose at a temperature of 40-100° C.;b) providing an oil phase comprising a water-immiscible solvent and an emulsifier at a temperature of 40-100° C.;c) emulsifying the water phase in the oil phase to form a water-in-oil emulsion;d) cooling the water-in-oil emulsion to a temperature below a gelation temperature of the agar or agarose to form a dispersion of solidified agar or agarose beads; ande) recovering agar or agarose beads from the dispersion,wherein the emulsifier comprises a phosphate ester of an alkoxylated fatty alcohol.