defoamer for food
A defoamer, food technology, applied in the direction of food preparation, application, milk substitutes, etc.
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manufacture example 1
[0078] First, 20 kg of glycerin was put into a reaction kettle equipped with a stirrer, a thermometer, a gas blowing tube, and a water separator, and 100 mL of a 20 wt / vol% aqueous solution of sodium hydroxide was added as a catalyst. 4 hours for the glycerol condensation reaction. The obtained reaction product was cooled to about 90°C, and about 20 g of phosphoric acid was added to neutralize it, and then filtered, and the filtrate was distilled under reduced pressure at 160°C and 250 Pa to remove glycerin, and then, at 200°C and 20 Pa under high vacuum Vacuum distillation was carried out under the conditions to obtain about 3.0 kg of a fraction (diglycerol mixture) containing 3% glycerol, 92% diglycerol, and 5% triglycerol. Next, 1% by mass of activated carbon was added to the fraction, decolorized under reduced pressure, and then filtered. The obtained diglycerol had a hydroxyl value of about 1359, an average degree of polymerization of about 2.0, and a purity of 98%.
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manufacture example 2
[0081] 148.5 g (about 0.89 mol) of diglycerin obtained in the above-mentioned Production Example 1, octanoic acid (trade name: NAA-82; 151.5 g (approximately 1.05 mol) of NaOH) was added to 1.5 mL of a 10 wt / vol% aqueous solution of sodium hydroxide as a catalyst, and the esterification reaction was carried out at 200° C. for 1 hour under normal pressure and in a nitrogen stream, and then, Then raise the temperature to 230° C., and carry out the esterification reaction for about 2 hours until the acid value reaches below 1.0. The obtained reaction mixture was cooled to obtain about 270 g of an antifoaming agent for food (trial product 2).
manufacture example 3
[0083] 125.1 g (about 0.75 mol) of diglycerin obtained in the above-mentioned Production Example 1, caprylic acid (trade name: NAA-82; 174.9 g (approximately 1.21 moles) of the oil company), 1.5 mL of a 10 wt / vol % aqueous solution of sodium hydroxide was added as a catalyst, and the esterification reaction was carried out at 200° C. for 1 hour under normal pressure and in a nitrogen stream, and then, Then increase the temperature to 230° C., and carry out the esterification reaction for about 2.5 hours until the acid value reaches below 1.0. The obtained reaction mixture was cooled to obtain about 270 g of an antifoaming agent for food (trial product 3).
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