Preparation method of alkyl polyglycoside from sweet potato starch

A technology for alkyl polyglycoside and sweet potato starch, which is applied in the field of preparation of sweet potato starch alkyl polyglycoside, can solve the problems of low yield, limited application scope and the like, and achieves low residual sugar rate, good foaming and foam stability , the effect of high reaction efficiency

Inactive Publication Date: 2018-04-03
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are also nonionic surfactants prepared from sweet potato starch as raw material, but the yield is low, which limits its scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of sweet potato starch alkyl polyglucoside comprises the following steps:

[0020] (1) Stir and mix sweet potato starch and isopropanol according to the mass ratio of 1:5 to obtain suspension A;

[0021] (2) According to the mass ratio of 2:3, mix isopropanol and dodecylbenzenesulfonic acid, after stirring, heat to 110°C, and reflux for 30 minutes to obtain the mixed solution B;

[0022] (3) According to the mass ratio of suspension A and mixed solution B as 2:3, after stirring the suspension A, add it to the mixed solution B in batches, after each addition is completed, until the system is clarified, add again;

[0023] (4) Preheat dodecanol to 80°C, then add it to the reaction system of step (3), distill under reduced pressure at a pressure of 0.01MPa for 2 hours, cool down to room temperature naturally, and then adjust the pH of the system to 8 to terminate the reaction; Wherein, the quality of lauryl alcohol is 0.8 times of the quality of sus...

Embodiment 2

[0026] The preparation method of sweet potato starch alkyl polyglucoside comprises the following steps:

[0027] (1) Stir and mix sweet potato starch and isopropanol according to the mass ratio of 1:5 to obtain suspension A;

[0028] (2) According to the mass ratio of 2:5, mix isopropanol and dodecylbenzenesulfonic acid, after stirring, heat to 120°C, and reflux for 50 minutes to obtain the mixed solution B;

[0029] (3) According to the mass ratio of suspension A and mixed solution B as 2:3, after stirring the suspension A, add it to the mixed solution B in batches, after each addition is completed, until the system is clarified, add again;

[0030] (4) Preheat dodecyl alcohol to 80°C, then add it into the reaction system of step (3), distill under reduced pressure at a pressure of 0.01MPa for 3 hours, cool down to room temperature naturally, and then adjust the pH of the system to 9 to terminate the reaction; Wherein, the quality of lauryl alcohol is 0.8 times of the qualit...

Embodiment 3

[0033] The preparation method of sweet potato starch alkyl polyglucoside comprises the following steps:

[0034] (1) Stir and mix sweet potato starch and isopropanol according to the mass ratio of 1:5 to obtain suspension A;

[0035] (2) According to the mass ratio of 2:3.9, mix isopropanol and dodecylbenzenesulfonic acid, after stirring, heat to 113°C, and reflux for 40 minutes to obtain the mixed solution B;

[0036] (3) According to the mass ratio of suspension A and mixed solution B as 2:3, after stirring the suspension A, add it to the mixed solution B in batches, after each addition is completed, until the system is clarified, add again;

[0037] (4) Preheat dodecyl alcohol to 80°C, then add it to the reaction system of step (3), distill under reduced pressure at a pressure of 0.01MPa for 2.4h, cool down to room temperature naturally, and then adjust the pH of the system to 8.5 to terminate the reaction ; Wherein, the quality of dodecyl alcohol is 0.8 times of the quali...

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Abstract

The invention discloses a preparation method of sweet potato starch alkyl polyglucoside, which comprises the following steps: (1) stirring and mixing sweet potato starch and isopropanol to obtain suspension A; (2) mixing isopropanol and dodecylbenzenesulfonate Mix the acid, stir, heat to 110-120°C, and reflux to obtain the mixed solution B; (3) After stirring the suspension A, add it to the mixed solution B in batches. After each addition is completed, until the system is clear, Adding again; (4) Preheat dodecyl alcohol to 80°C, then add it into the reaction system of step (3), carry out vacuum distillation for 2‑3h, cool naturally to room temperature, and then adjust the pH of the system to 8‑9; (5) The product of step (4) was washed 5 times with absolute ethanol, and then centrifuged. The invention adopts a transglycosidation method to prepare sweet potato starch alkyl polyglucoside, which has high reaction efficiency, low residual sugar rate, and good foamability and foam stability.

Description

technical field [0001] The invention belongs to the technical field of nonionic surfactants, and in particular relates to a preparation method of sweet potato starch alkyl polyglucoside. Background technique [0002] Alkyl polyglycosides (APGs), as an important new generation of nonionic surfactants, are synthesized based on natural renewable resources, including sugars, starches and fatty alcohols, and are biodegradable[1]. The process of synthesizing glycosides is the combination of polysaccharides and nucleophiles, such as ethanol, sugars or proteins. APG has been widely used in many fields in recent years because of its low surface and interfacial tension, rich, fine and stable foam, good detergency and compatibility, and non-toxic and non-irritating properties. The traditional process uses glucose as raw material, condenses with short-chain alcohols (n-butanol, ethylene glycol, etc.) under organic acid catalysis, and then transglycosides with long-chain fatty alcohols ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/10
CPCC08B31/10
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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