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Method for preparing sodium cocoyl isethionate

A kind of technology of sodium cocoyl isethionate and sodium isethionate, applied in the field of preparing sodium cocoyl isethionate, can solve the problem of high reaction temperature, low single yield, complicated operation, etc. To achieve the effect of reducing reaction temperature, low synthesis cost and good selectivity

Active Publication Date: 2021-05-21
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process has problems such as complex operation, high reaction temperature, large amount of waste, high energy consumption, and low single yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation [Bu 3 PC 14 h 29 ] + ·[HSO 4 ] -

[0023] At room temperature, add 435.1g of quaternary phosphonium salt tributyltetradecylphosphonium chloride (TTPC) into the reactor, start stirring, slowly add 100.1g of 98wt% sulfuric acid dropwise, and then slowly raise the temperature to 95-100°C Insulation reaction for 24h; after the reaction, the reaction product was washed 3 times with 100ml of saturated aqueous sodium bisulfate solution, and the organic layer was subjected to vacuum distillation to remove water and then cooled, and suction filtered to remove the precipitated salt to obtain the target product [Bu 3 PC 14 h 29 ] + ·[HSO 4 ] - .

[0024] In reactor, add coconut oil 600.0g, add sodium glycolate 199.4g, then add 201.5g [Bu 3 PC 14 h 29 ] + ·[HSO 4 ] - Ionic liquid, open N 2 , after replacing the system three times, evacuate to 0.05MpaG, raise the temperature to 80°C, and time the reaction for 120min; after the reaction is completed, coo...

Embodiment 2

[0026] Preparation [Bu 3 PC 14 h 29 ] + ·[H 2 PO 4 ] -

[0027] At room temperature, add 435.1g TTPC to the reactor, start stirring, slowly add 115.2g of 85wt% phosphoric acid dropwise, and then slowly raise the temperature to 105-100°C for 24 hours; after the reaction, wash the reaction product with 50ml saturated sulfuric acid Sodium hydrogen aqueous solution washes 3 times, the organic layer carries out decompression distillation to remove water and then cools, suction filtration, removes the salt that separates out, obtains target product [Bu 3 PC 14 h 29 ] + ·[H 2 PO 4 ] - .

[0028] Add coconut oil 587.5g in the reactor, add sodium glycolate 235g, then add 188.3g of [Bu 3 PC 14 h 29 ] + ·[H 2 PO 4 ] - Ionic liquid, open N 2, after the system was replaced three times, adjust the N2 stripping pressure to 0.2MpaG, raise the temperature to 110°C, and time the reaction for 4h; after the reaction is completed, cool to room temperature, add 2500g of acetone...

Embodiment 3

[0030] Preparation [Bu 3 PC 14 h 29 ] + ·[PTSA] -

[0031] At room temperature, add 957.2g TTPC into the reactor, start stirring, slowly add 397.8g of p-toluenesulfonic acid dropwise, then slowly raise the temperature to 105-110°C and keep it warm for 48h; after the reaction, saturate the reaction product with 50ml Sodium bisulfate aqueous solution was washed 3 times, and the organic layer was subjected to decompression distillation to remove water, then cooled, suction filtered, and the precipitated salt was removed to obtain the target product [Bu 3 PC 14 h 29 ] + ·[PTSA] - .

[0032] Add coconut oil 2000.0g in the reactor, add sodium glycolate 498.9g, then add 750.3g of [Bu 3 PC 14 h 29 ] + ·[PTSA] - Ionic liquid, turn on N2, after three system replacements, adjust the N2 stripping pressure to 0.05MpaG, raise the temperature to 120°C, and time the reaction for 5h; after the reaction is completed, cool to room temperature, add 3000g of ether to the system while...

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PUM

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Abstract

The invention relates to a method for preparing sodium cocoyl isethionate, which is characterized in that coconut oleic acid is used as a raw material, quaternary phosphonium salt ionic liquid is used as a solvent and a catalyst, and the coconut oleic acid reacts with sodium isethionate by a one-step method to generate the sodium cocoyl isethionate. The method is low in synthesis cost, simple in process and mild in reaction condition, the reaction time is shortened, the reaction temperature is reduced, the reaction conversion rate is high, the selectivity is good, the catalyst is green and recyclable, the three wastes are few, and the method is a green and environment-friendly preparation method.

Description

technical field [0001] The invention relates to the field of surfactants such as detergents, in particular to a method for preparing sodium cocoyl isethionate. Background technique [0002] Sodium cocoyl isethionate, referred to as SCI, is a mild, anionic surfactant with excellent foaming and foam stabilizing properties. SCI has excellent resistance to hard water, with extremely low toxicity, good biodegradability, excellent resistance to hard water, and products made of it have no residue after use. SCI can be used alone to produce dense, fine and stable foam, and can also be used in combination with other surfactants such as betaine, amides, amine oxides, etc. to synergize the system. The compatibility of SCI is very good, it can be compounded and used with various additives. In addition, SCI has low toxicity and good biodegradability, so it is widely used in daily chemical products and other industrial fields. But in recent years, it has gradually begun to use it to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C303/44C07C309/12B01J31/02
CPCC07C303/32C07C303/44B01J31/0288B01J2231/49C07C309/12Y02P20/54Y02P20/584
Inventor 郭斌蔺海政桂振友刘杰孔令晓任娟梁静杨洗
Owner WANHUA CHEM GRP CO LTD
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