FIELD: chemistry.
SUBSTANCE: invention relates to methods for producing inorganic polysilazane which can be used as a precursor to create coatings from silicon oxide or nitride. Disclosed is a method for preparing a solution of inorganic polysilazane in dibutyl ether.The method includes the synthesis of polysilazane by the reaction of ammonolysis of dichlorosilane with an excess of ammonia in a mixture of pyridine with dibutyl ether to obtain polysilazane and ammonium chloride, removal of ammonium chloride by filtration followed by removal of pyridine from the filtrate carried out in a solution of pyridine in dibutyl ether with a pyridine concentration of 22-50 mol. %, and the subsequent removal of pyridine from the filtrate is carried out by distillation with the return of the distillate to the synthesis stage.
EFFECT: method is waste-free, environmentally friendly and can be used to obtain a solution of polysilazane in dibutyl ether using a simplified technology.
1 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SOLUTION FOR APPLYING POLYSILAZAN-CONTAINING COATING AND ITS USAGE | 2003 |
|
RU2332437C2 |
| METHOD OF PRODUCING 1-PHENYL PROPARGYL ALCOHOL | 2012 |
|
RU2515241C1 |
| SYNTHESIS AND PURIFICATION OF 3,3-DIMETHYLBUTYRALDEHYDE THROUGH OXIDATION OF 1-CHLORO-3,3-DIMETHYLBUTANE WITH DIMETHYLSULFOXIDE (VARIANTS) | 1999 |
|
RU2217410C2 |
| METHOD FOR PRODUCING PRE-CERAMIC FIBER-FORMING OLIGOORGANOSILAZANES | 2021 |
|
RU2767238C1 |
| METHOD FOR PREPARING N-PHOSPHONOMETHYLGLYCINE AND INTERMEDIATE SUBSTANCE FOR ITS PREPARING | 2000 |
|
RU2260010C2 |
| METHOD OF PRODUCING C-UREA | 2016 |
|
RU2638837C1 |
| METHOD OF OBTAINING CARBAMIDE LABELLED BY STABLE ISOTOPE C | 2010 |
|
RU2440826C1 |
| METHOD FOR SYNTHESIS OF β-L-5-FLUORO-2',3'-DIDEOXY-2',3'-DIDEHYDROCYTIDINE (β-L-FD4C) | 2003 |
|
RU2310661C2 |
| METHOD OF PRODUCING HETEROCYCLE-SUBSTITUTED PYRIDINE DERIVATIVES | 2008 |
|
RU2474581C2 |
| METHOD FOR OBTAINING MEDETOMIDINE AND DERIVATIVES | 2022 |
|
RU2791397C1 |
