ChemicalBook CAS DataBase List 1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE

1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE synthesis

7synthesis methods

Product Name:1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE
CAS Number:18001-60-0
Molecular formula:C10H26O5Si2
Molecular Weight:282.48

2031-67-6 Synthesis

2031-67-6
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1,1,3,3-TETRAETHOXY-1,3-DIMETHYLDISILOXANE

18001-60-0
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Yield:18001-60-0 92.7%

Reaction Conditions:

with hydrogenchloride;water in ethanol; for 5 h;Cooling with ice;Large scale;Reagent/catalyst;

Steps:

1.1

(1) 150 ml of absolute ethanol, 4 g of distilled water (3 mol), and 2 drops of concentrated hydrochloric acid (concentration 36.5 to 37.5%) prepare solution A into the 250ml constant pressure dropping funnel for use. 1283.8 g of methyltriethoxysilane (7.2 mol) was added to a 2000 ml three-necked flask. Under ice-cooling and stirred cooled, solution A was slowly added dropwise. After dropping for 3 hours in the ice bath, continue to react for 2 hours. Finally, the reaction product was distilled to 90 ° C to remove most of the ethanol. The temperature was reduced to 60 ° C and the remaining ethanol and excess methyltriethoxysilane were removed by distillation under reduced pressure. Solution temperature to 120 ° C. Vacuum degree of -0.095 MPa no liquid and then maintain the end of 30 minutes. After the reaction, 785.6 g of the product was obtained. The yield was 92.7% based on methyltriethoxysilane. The product content was 97% by liquid chromatography.

References:

CN106366107,2017,A Location in patent:Paragraph 0066; 0067; 0068; 0087; 0088; 0089

64-17-5 Synthesis