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ChemicalBook CAS DataBase List Ultranox 626
26741-53-7

Ultranox 626 synthesis

2synthesis methods
2,4-Di-tert-butylphenol

96-76-4

3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane

3643-70-7

Ultranox 626

26741-53-7

(3) The product dichloropentaerythritol diphosphite obtained from step (2) was dropwise added to a 0.6 mol/L aqueous solution of 2,4-di-tert-butylphenol. The molar ratio of 2,4-di-tert-butylphenol to dichloropentaerythritol diphosphite was maintained at 2.30:1. The mixture was stirred under nitrogen at a speed of 800 rpm and reacted at 60°C for 2 hours. The hydrogen chloride gas generated during the reaction was absorbed by a sodium hydroxide solution. (4) The solvent was removed by vacuum distillation under reduced pressure at 100°C and 0.06 MPa. An appropriate amount of isopropanol was then added to the residue, and the mixture was stirred to crystallize the product. (5) The reaction mixture obtained from step (4) was subjected to suction filtration to yield a white solid powder, identified as bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite.

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Yield:26741-53-7 99.6%

Reaction Conditions:

in water at 60; for 2 h;Inert atmosphere;Temperature;Time;

Steps:

1.3; 1.4; 1.5
(3) The product of the product dichloropentaerythritol diphosphite obtained in the step (2) is added dropwise to an aqueous solution of 2,4-di-tert-butylphenol having a concentration of 0.6 mol/L, 2,4-di-tert-butyl The molar ratio of phenol and dichloropentaerythritol diphosphite is 2.30:1, stirred by nitrogen, stirring speed is 800 rpm, and reacted at 60 ° C for 2 h, the hydrogen chloride gas formed by the reaction is sodium hydroxide solution. absorb;(4) The solvent is distilled off under reduced pressure at a temperature of 100 ° C and a pressure of 0.06 MPa, and then an appropriate amount of isopropanol is added, and the product is crystallized by stirring;(5) The product obtained in the step (4) is suction-filtered to obtain a white solid powder, which is bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite.

References:

Jiangsu Jiyi New Materials Co., Ltd.;Guo Jiaoyang CN108250240, 2018, A Location in patent:Paragraph 0034; 0037; 0038; 0106; 0108; 0110; 0112; 0114

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