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26741-53-7

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Synthetic process of antioxidant 626
The invention discloses a synthetic method of an antioxidant 626, namely bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite. The method disclosed by the invention comprises the following steps: firstly adding a catalyst to a selected solvent, performing stirring, then adding phosphorus trichloride, introducing nitrogen gas, continuously performing stirring, then dropwise adding pentaerythritol, and absorbing the generated hydrogen chloride gas with a sodium hydroxide solution; purifying the reaction product to obtain a dichloropentaerythritol diphosphite solution; and then, dropwise adding the dichloropentaerythritol diphosphite solution to a 2,4-di-tert-butylphenol aqueous solution, introducing nitrogen gas, performing stirring, absorbing the hydrogen chloride gas generated by reaction with the sodium hydroxide solution, and purifying the reaction product to obtain the product. The method disclosed by the invention has the advantages that the adopted raw materials are low in price, the reaction is easy to perform, side reactions are few, the purity of the product is high, the reaction time is short, the storage time of the product is long, the product has good hydrolysis resistance and stability, and furthermore, the yield of the product is also very high.
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Paragraph 0034; 0037; 0038; 0106; 0108; 0110; 0112; 0114

(2018/07/30)

One pot synthesis of 3,9-bis-(2,4-di-tert-butyl phenoxy)-2,4,8,10-tetraoxa- 3,9-diphospha-spiro[5.5]undecane, their chalcogenides and metal complexes
A simple method for the synthesis of 3,9-di[2,4-di-tert-butyl phenoxy]-2,4,8,10-tetraoxa-3,9-diphospha-spiro[5.5]undecane and its chalcogenides and metal complex are reported.
Rani, Manju,Shukla, Davender Kumar,Khan, Arif Ali
p. 4556 - 4558
(2013/07/25)

Process for the preparation of cyclic phosphites
The present invention relates to a process for the preparation of pentaerythritol esters of phosphorous acid derivatives by reacting pentaerythritol with a phosphorous trihalide and a phenol in the presence of a quaternary salt or a polyether. The use
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(2008/06/13)

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Chemical Properties

Appearance/Colour :White powder
Melting Point: 160-178 °C
Boiling Point: 555.8 °C at 760 mmHg
Flash Point:363.9 °C
Density: 1.166[at 20℃]
Solubility:Chloroform (Slightly), Hexanes (Slightly, Heated)
Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C
Vapor Pressure: 8.01E-12mmHg at 25°C
PSA: 82.56000
LogP: 9.86820

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