Surfactant Composition Melting Point Reduction
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Solution Overview
Problem
Alkyl ether sulfate surfactants based on C16 and C18 chains have high melting points, making them difficult to handle and transport without extensive heating, as they typically have melting points above 45°C.
Innovation Solution
Combining C16 and/or C18 ether sulfate with an alcohol ethoxylate having an oleyl and/or elaidic chain reduces the melting point below 40°C, creating a surfactant mixture that flows more easily, comprising a specific weight percentage range of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If C16 and C18 ether sulfate surfactants are used, then effective cleaning properties are maintained, but melting point is too high (above 45°C) making handling difficult
Solution Approach 1:
The patent combines C16 and C18 ether sulfate surfactants with alcohol ethoxylates having oleyl and/or elaidic chains to create a composite surfactant system. This composite approach allows the mixture to have a lower melting point (below 40°C) while maintaining the effective cleaning properties of the ether sulfate components, thus resolving the contradiction between reliability of cleaning and ease of handling.
Solution Approach 2:
The patent changes the physical state parameters of the surfactant system by combining components with different melting characteristics. The alcohol ethoxylate component with oleyl/elaidic chains modifies the overall melting behavior of the surfactant mixture, transforming it from a high-melting solid (>45°C) to a lower-melting material (<40°C) that flows more easily through pipes without extensive heating.
2Ease of operation
If extensive heating is applied to reduce melting point, then flowability improves, but energy consumption and processing complexity increase
Solution Approach 1:
Instead of changing temperature parameters through heating, the patent changes the compositional parameters by adding alcohol ethoxylate components. This compositional modification inherently lowers the melting point and improves flowability at ambient or moderate temperatures, avoiding the need for extensive heating and reducing energy consumption.
Solution Approach 2:
The patent replaces the thermal approach (heating) with a compositional approach (adding specific surfactant components). This substitution eliminates the need for energy-intensive heating systems and complex temperature control mechanisms, simplifying the processing system while achieving the desired flowability.
Data Source
AI summary
The invention concerns a surfactant composition comprising: (a) from 10 to 90 wt.% of an alcohol ethoxylate of formula R1-(OCH2CH2)mOH where R1 is oleyl and/or elaidic and where m is from 6 to 16; and, (b) from 10 to 90 wt.% of an alcohol ether sulfate of formula R2- (OCH2CH2)nOSO3H where R2 is saturated or monounsaturated linear C16 and C18 alkyl chain and n is from 5 to 20; wherein the total level of (a) + (b) is greater than 80 wt.%; a detergent composition comprising said surfactant composition; and a domestic method of treating a textile, the method comprising the step of: treating a textile with an aqueous solution of 0.5 to 20 g/L of said detergent composition.