Sodium Hydroxide → Magnesium stearyl phosphate

HRID 972047

Reaction equation

[P:1]([O-:23])([O-:22])([O:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])=[O:2].[OH-].[Na+].S([O-])([O-])(=O)=O.[Mg+2:31]>O>[P:1]([O-:22])([O-:23])([O:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])=[O:2].[Mg+2:31]

Participants

Conditions

Temperature: 70 °C

Procedure

Water (19 L) was added to stearyl phosphate (molar ratio of diester/monoester=1/2.7; acid value, 231.7 mg KOH/g) (1 kg) while heating at 70° C., whereby the stearyl phosphate was dispersed uniformly. An aqueous solution of sodium hydroxide (500 g/L) (331 ml) was dropwise added to the mixture while keeping the said temperature. When the addition was finished, the mixture showed a pH of about 11.5. An aqueous solution of magnesium sulfate (300 g/L) (846 ml) was gradually added thereto at a temperature of 60° to 70° C. After the addition was finished, the mixture was stirred at 60° C. for 90 minutes. On confirming that the remaining magnesium ion in water became constant, the reaction was finished. The product was collected, washed, dried at 75° C. for 72 hours and then pulverized by the aid of a hammer mill to give magnesium stearyl phosphate (1014.1 g). Yield, 97%. M.P., 210° to 215° C. Apparent specific volume, 5.0 ml/g. Elementary analysis: calcd., P=7.1%, Mg=4.8%; found, P=7.0%, Mg=4.6%.

Workup

additionWhen the addition
customat a temperature of 60° to 70° C
additionAfter the addition
customThe product was collected
washwashed
customdried at 75° C. for 72 hours

Sources & evidence

ORD record: ord-f477bcd0ab0f4d60aaadf8bdf20b1df5
Source dataset: uspto-grants-1979_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04163018

Linked notes

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