Synthesis method of cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine

A technology of sulfopropyl beet and cocamidopropyl, which is applied in the field of synthesis of zwitterionic surfactants in organic chemistry, to achieve the effects of reducing irritation, good calcium soap dispersion, and good hard water resistance

Inactive Publication Date: 2010-02-24
ZHEJIANG HECHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] About the synthetic method of cocamidopropyl-2-hydroxyl-3-sulfopropyl betaine, there is no report both at home and abroad, but it has only appeared in some foreign daily necessities formulas, such as the U.S. Lonzaine company's CS, French Rhodia company CBS, American Stepan's CS-50

Method used

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  • Synthesis method of cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine
  • Synthesis method of cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine
  • Synthesis method of cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Step 1 of this example: add 500kg of coconut oil fatty acid (purchased from Shandong Boxing China Resources Oleochemical Co., Ltd.) Complete the heat preservation reaction for 4.0h. Then, the reaction was carried out at a pressure of 20 Pa and a temperature of 200° C. for 4.0 hours to obtain the intermediate cocamide.

[0026] Step 2: Add 222kg of epichlorohydrin into the reaction kettle, stir and heat to 85-90°C, start to add 250kg of anhydrous sodium bisulfite in batches, and keep warm for 8.0 hours to obtain the intermediate chlorohydroxypropyl sulfonic acid sodium.

[0027] Step 3: Add 667kg of intermediate cocamide into the reaction kettle, heat to 85-90°C, add 11kg of potassium hydroxide, start to add 434kg of intermediate sodium chlorhydroxypropyl sulfonate in batches, and keep warm for 8.0 hours after adding. The target product cocamidopropyl-2-hydroxyl-3-sulfopropyl betaine was obtained with a molecular weight of 429.

Embodiment 2

[0029] Step 1 of this embodiment: add 500kg coconut oil fatty acid (purchased from Shandong Boxing China Resources Oleochemical Co., Ltd.) in the reaction kettle, stir and heat to 60~62 ℃, start to drop 295kgN, N-dimethylpropylenediamine, After adding, keep warm and react for 2.0h. Then, the reaction was carried out at a pressure of 100 Pa and a temperature of 160° C. for 3.0 hours to obtain the intermediate cocamide.

[0030] Step 2: Add 222kg of epichlorohydrin into the reaction kettle, stir and heat to 60-65°C, start to add 287kg of anhydrous sodium bisulfite in batches, and keep warm for 5.0 hours to obtain the intermediate chlorohydroxypropyl sulfonic acid sodium.

[0031] Step 3: Add 667kg of intermediate cocamide into the reaction kettle, heat to 80-85°C, add 46kg of potassium hydroxide, start to add 447kg of intermediate sodium chlorhydroxypropyl sulfonate in batches, and keep warm for 4.0 hours after adding. The target product cocamidopropyl-2-hydroxyl-3-sulfopropyl...

Embodiment 3

[0033] Step 1 of this example: add 500kg of coconut oil fatty acid (purchased from Shandong Boxing China Resources Oleochemical Co., Ltd.) into the reaction kettle, stir and heat to 105-110°C, and start to add 390kg of N,N-dimethylpropylenediamine dropwise , After adding the heat preservation reaction for 1.0h. Then, the pressure was 200Pa, the temperature was 140°C and the temperature was kept for 1.0h to obtain the intermediate cocamide.

[0034] Step 2: Add 222kg of epichlorohydrin into the reaction kettle, stir and heat to 40-45°C, start to add 324kg of anhydrous sodium bisulfite in batches, and keep warm for 3.0 hours to obtain the intermediate chlorohydroxypropyl sulfonic acid sodium.

[0035] Step 3: Add 667kg of intermediate cocoamide into the reaction kettle, heat to 60-65°C, add 113kg of sodium hydroxide, start to add 467kg of intermediate sodium chlorhydroxypropyl sulfonate in batches, and keep warm for 2.0 hours after adding. The target product cocamidopropyl-2-h...

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Abstract

The invention discloses a synthesis method of cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine, which adopts coconut oil fatty acid, N,N-dimethyl propane diamine, epoxy chloropropane and sodium bisulfite anhydrous as raw materials. The synthesis method comprises the following specific steps of carrying out amidation reaction on coconut oil fatty acid and N,N-dimethyl propane diamine to generate intermediate cocoamide; then carrying out addition reaction on epoxy chloropropane and sodium bisulfite anhydrous to generate intermediate sodium propylsulfonate; and finally carrying out quaternizationreaction on the produced intermediate cocoamide and the intermediate sodium propylsulfonate under the existence of a catalyst so as to generate the target product, namely, the cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine. The product of the synthesis method has good hard water resistance, conditioning and antistatic property, is stable in the wide range of pH value, is not influenced in acid-base medium, is stable in an electrolyte system and is degradable and non-toxic.

Description

technical field [0001] The invention relates to a synthesis method of a novel daily-use chemical formula monomer cocoamidopropyl-2-hydroxyl-3-sulfopropyl betaine, which belongs to the technical field of synthesis of zwitterionic surfactants in organic chemistry. Background technique [0002] Cocamidopropyl-2-hydroxy-3-sulfopropyl betaine is a colorless to light yellow liquid, soluble in water, compatible with various surfactants, can reduce the irritation of other surfactants, foam Rich and delicate, not affected by pH value, good resistance to hard water, conditioning and antistatic. It is stable in a wide pH range, unaffected in acid-base media, and stable in electrolyte systems. Degradable and non-toxic. In combination with lauryl sulfate and α-alkenyl sulfonate, it has good foam and viscosity. It has good calcium soap dispersing power. It can be used as foam booster, detergent, cloud point depressant, hydrotrope, etc. It is suitable for the preparation of mild premi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/14C07C303/22
Inventor 王伟松王新荣金一丰李福强曾红舟
Owner ZHEJIANG HECHENG CHEM
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