Basic Synthesis Process of Ethyl Silicone Oil
Ethyl silicone oil is an important organosilicon material. Its synthesis process mainly includes the following key steps:
Preparation of Ethylethoxysilane: Gluconic reagent is prepared by reacting ethane chloride with magnesium metal as a catalyst.
Ethyl tetraethyl orthosilicate is used as a raw material, and the reaction is carried out in toluene solvent.
The reaction produces an ethylethoxysilane intermediate.
Hydrolysis and Polycondensation Reaction: Various ethylethoxysilanes are hydrolyzed in the presence of hydrochloric acid.
The hydrolysis products are condensed to form polysiloxanes.
Molecular Rearrangement Process: Polysiloxanes undergo molecular rearrangement under specific conditions. Rearrangement
This is a crucial step in adjusting the molecular weight and viscosity of the product.

Post-processing: The rearranged product is fractionated under vacuum. Low-boiling-point substances are removed by vacuum distillation to obtain ethyl silicone oil products of different viscosities.

Molecular structure regulation: The length and structure of the siloxane chains are adjusted through the rearrangement reaction to obtain products with different molecular weights and viscosities.

Process optimization: Rearrangement is usually carried out under acidic conditions. Subsequent vacuum distillation is required to remove low-boiling-point substances.

Product performance improvement: Rearrangement technology can improve the transparency and stability of the product, reduce residual acid value, and expand its application range (e.g., in the cosmetics industry).