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Synthesis method of castor oil acyl sulfamate ampholytic surfactant

A technology of oleoyl sulfamate and surfactants, which is applied in the synthesis field of castor oil acyl sulfamate amphoteric surfactants, can solve the problem of poor surface/interface activity, increased purification costs, and poor water solubility and other problems, to achieve the effect of excellent compatibility, high surface/interface activity, and good interface activity

Pending Publication Date: 2021-06-01
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Possible problems are: the water solubility is not good enough; in order to obtain a single-component compound, the cost of purification treatment needs to be increased; the surface / interface activity is not good; the compatibility is not good, etc.

Method used

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  • Synthesis method of castor oil acyl sulfamate ampholytic surfactant
  • Synthesis method of castor oil acyl sulfamate ampholytic surfactant
  • Synthesis method of castor oil acyl sulfamate ampholytic surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After castor oil was washed 3 times with hot saturated brine, 50 g of treated castor oil was poured into a reaction flask with a stirrer and a temperature sensor, and 30 g of 20% NaOH aqueous solution was added dropwise at room temperature, and the temperature was raised to 65° C. for reaction After 3 hours, solution A was obtained; solution A was washed twice with saturated brine to obtain product B.

[0021] 29mL of diethylenetriamine and 15mL of xylene are contained in a reaction flask equipped with a stirrer, a temperature sensor and a water separator. Add 18.8g of product B in batches at 80°C. 172°C, react until the acid value is 8.62g / g, then diethylenetriamine is distilled off under reduced pressure to obtain product C.

[0022] At room temperature, add 18.4g of product C to a reaction flask containing 42mL of 30% aqueous sodium chloroethylsulfonate solution, stir well, then raise the temperature to 80°C to start the reaction, and adjust the pH of the system with...

Embodiment 2

[0024] After castor oil was washed 3 times with hot saturated brine, 198g of treated castor oil was poured into a reaction flask with a stirrer and a temperature sensor, and 102g of 20% NaOH aqueous solution was added dropwise at room temperature, and the temperature was raised to 72°C for reaction After 3.2 hours, solution A was obtained; solution A was washed three times with saturated brine to obtain product B.

[0025] 116mL of diethylenetriamine and 52mL of a mixture of toluene and xylene (mixed at a volume ratio of 2:8) were contained in a reaction flask with a stirrer, a temperature sensor and a water separator, and 76.4g of product B was mixed in batches at 85°C After adding nitrogen, stir evenly, slowly raise the temperature to 166°C, react until the acid value is 9.74g / g, and then diethylenetriamine is distilled off under reduced pressure to obtain product C.

[0026] At room temperature, add 71.6g of product C into a reaction flask containing 162mL of 32% 2-hydroxy-...

Embodiment 3

[0028] The surface / interface activity, water solubility and compatibility with other surfactants of the products synthesized in Example 1 and Example 2 were studied, see Table 1 and Table 2 below.

[0029] Table 1 critical micelle concentration (cmc)

[0030]

[0031]

[0032] Wherein: the critical micelle concentration of embodiment 1, embodiment 2 product adopts tension method and conductometric method to estimate, get the average value of both; Reference for the critical micelle concentration value of octylphenol ethoxylate (10): Rosen M.J.Surfactants and Interfacial Phenomena (3th edition)[M].JohnWiley&Sons.Inc.,2004.

[0033] Table 2 Water Solubility and Compatibility

[0034]

[0035] Wherein: water solubility is evaluated by the appearance of 1 wt% aqueous solution (22°C).

[0036] From the data in Table 1, it can be known that the synthesized product of the present invention shows better surface / interface activity.

[0037] Table 2 shows that the product sy...

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Abstract

The invention relates to a synthetic method of a castor oil acyl sulfamate ampholytic surfactant. The synthetic method comprises the following steps: 1, pretreating castor oil; 2, dropwise adding an aqueous alkali solution into the pretreated castor oil, carrying out a reaction at a low temperature to obtain a solution, washing the solution with water, layering, and collecting an organic phase to obtain a product B; 3, dropwise adding the product B into diamine or polyamine, adding a water carrying agent or a molecular sieve, and after the reaction is finished at high temperature, removing diamine or polyamine to obtain a product C; and 4, reacting the product C with a sulfonating agent at low temperature to obtain a final product D, and treating the final product D as required. According to the synthesis method, the purification treatment process for synthesizing an intermediate product and a final product can be simplified or not treated according to actual requirements, so that the synthesis method is simple, and the operation cost is low; and the raw material source is wide, the raw material source is renewable, and the synthesized product has the characteristics of high surface / interface activity, high water solubility, excellent compatibility with other active substances and the like, and is suitable for different fields such as daily chemicals and industry and agriculture.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a synthesis method of castor oil acyl sulfamate amphoteric surfactant. Background technique [0002] Amino acid surfactants are a kind of green, environment-friendly mild surfactants. In addition to the basic properties of conventional surfactants, more importantly, they have good affinity to the human body, low irritation, low toxicity, good Biodegradability and compatibility properties, etc. It is widely used in daily chemical products, food, pesticides and other industrial chemicals. [0003] Conventional amino acid surfactants are mostly: (1) molecules containing a single amino or amide group, or (2) a single component; etc. The possible problems are: the water solubility is not good enough; in order to obtain a single-component compound, the cost of purification treatment needs to be increased; the surface / interface activity is not good; the compatibility is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/24C11C1/02C11C3/00C11B3/00C09K23/24
CPCC11C1/025C11C3/00C11B3/00C09K23/00
Inventor 任朝华黄璟
Owner YANGTZE UNIVERSITY
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