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Preparation method of fatty acyl lactic acid or salt thereof

A technology of fatty acyl lactylate and fatty acyl lactylate, applied in the field of fine chemical preparation, can solve problems affecting product quality and downstream applications, and achieve the effect of high yield and low loss

Active Publication Date: 2020-04-28
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these documents use the form of lactate to react with fatty acids. During the reaction process, a large amount of alkaline substances are put into neutralization, resulting in the presence of a large amount of soap produced by unesterified fatty acids in the product, which seriously affects product quality and downstream applications. Recrystallization and other processes are used to purify and produce qualified products, which brings unfavorable factors to the expansion of production capacity and popularization and application of fatty acyl lactylate

Method used

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  • Preparation method of fatty acyl lactic acid or salt thereof
  • Preparation method of fatty acyl lactic acid or salt thereof
  • Preparation method of fatty acyl lactic acid or salt thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 220g of 90% lactic acid aqueous solution into the four-necked bottle, stir at 40°C, evacuate to a pressure of 2kPa, keep it for 2h, put in 284g of stearic acid, stir for 0.5h, put in a solid-phase composite catalyst formed by loading NaOH on 4A zeolite 4g. Raise the temperature to 200°C, react at a pressure of 10kPa for 2 hours, add NaOH to neutralize, recover the catalyst by filtration, lower the temperature, and discharge to obtain sodium stearoyl lactylate.

[0027] Simultaneously according to literature method: Geng Min et al. [Journal of Cereals and Oils of China, 2007 (06): 157-159] carry out comparative experiment, drop into 220g of 90% lactic acid in the four-necked bottle, add anhydrous sodium carbonate 21.2g to neutralize, stir until No bubbles were generated, heated to 235°C, put in 284g of stearic acid, stirred and reacted at constant temperature for 3h, lowered the temperature, and discharged to obtain a control sample.

[0028] Measure the mass percen...

Embodiment 2

[0032] Preparation of solid catalyst: Weigh Na 2 CO 3 20g, add 30g of distilled water, stir to dissolve, add 80g of 4A zeolite, place on a constant temperature heating magnetic stirrer at 40°C for immersion and stirring for 2h, let stand and age for 1h, dry the water in an oven at 105°C, and then transfer to 500°C Dry in a muffle furnace for 2h, and cool to room temperature to obtain Na 2 CO 3 A solid-phase composite catalyst loaded on 4A zeolite.

[0033] Synthesis of sodium lauroyl lactylate: Put 180g of 50% lactic acid aqueous solution into a four-neck bottle, stir at 20°C, vacuumize to a pressure of 0.5kPa, keep for 0.5h, add 190g of lauric acid, stir for 1h, and put in 42g of the above catalyst. Raise the temperature to 140°C, react at a pressure of 10kPa for 4 hours, add NaOH aqueous solution to neutralize, the catalyst is recovered by filtration, the temperature is lowered, and the material is discharged to obtain an aqueous solution of sodium lauroyl lactylate. No...

Embodiment 3

[0036] Put 307kg of 88% lactic acid into the reaction kettle, stir at 30°C, evacuate to a pressure of 1kPa, keep it for 1h, put in 250kg of myristic acid, stir for 0.5h, put in CaCO 3 Load 52kg of solid-phase composite catalyst formed on 4A zeolite, raise the temperature to 190°C, react at a pressure of 20kPa for 6h, add Ca(OH) 2 Neutralize, recover the catalyst by filtration, cool down, and discharge to obtain the calcium myristoyl lactylate product.

[0037] Determine the content of myristic acid (calcium) in the product, and calculate the conversion rate to be 85.2%.

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Abstract

The invention discloses a preparation method of fatty acyl lactic acid or salt thereof. The preparation method comprises the following steps: feeding a high-concentration lactic acid aqueous solution,dehydrating under the conditions of low temperature and high vacuum, and reacting with fatty acid under the action of a solid catalyst to generate fatty acyl lactic acid; and neutralizing the obtained fatty acyl lactic acid into salt as required to obtain the fatty acyl lactate. No organic solvent is used in the preparation process, the fatty acid conversion rate is high, and the preparation method can be used for downstream application without a purification procedure.

Description

technical field [0001] The invention relates to a method for preparing fatty acyl lactic acid or a salt thereof, and belongs to the technical field of fine chemical preparation. Background technique [0002] Fatty acyl lactic acid and its salts are a kind of all biomass-based surfactants with fatty acid carbon chain as hydrophobic group and oligomeric lactic acid as hydrophilic group. It is synthesized from natural fatty acid and lactic acid through esterification reaction. The product has Excellent human body safety, unique cleaning and moisturizing ability and antibacterial and antiseptic ability have broad application prospects in the field of food and daily chemicals, especially in dishwashing detergents and cosmetic formulations. [0003] With the improvement of consumers' safety awareness and consumption upgrades brought about by economic development, products with biomass-based properties are more likely to be recognized by consumers, especially for personal cleaning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/28C07C69/24B01J29/70B01J37/02
CPCC07C67/08C07C67/28B01J29/7003B01J37/0201C07C69/24
Inventor 张军杨秀全周媛白亮吴志宇
Owner CHINA RES INST OF DAILY CHEM IND
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