FIELD: chemistry.
SUBSTANCE: invention relates to field of obtaining biocidal composition for wood protection. Fraction of highly-boiling byproducts of 4,4-dimethyldioxane-1,3 synthesis with boiling temperature 105-120°C with residual pressure 20-30 mm Hg is heated with boric acid with their weight ratio 1:(0.45-0.47) to temperature 115-125°C with residual pressure 100-200 mm Hg with continuous distillation of released reaction water and formaldehyde. After that, hydrolysis of formed intermediate products with water is performed at temperature 80-85°C, precipitated boric acid is filtered, water is distilled under vacuum and viscous liquid, containing about 4.0% of boron is obtained in boiler.
EFFECT: invention provides simplified technology of obtaining biocidal composition based on highly-boiling byproducts of 4,4-dimethyldioxane-1,3 synthesis.
2 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| BIOCIDAL COMPOSITION AND METHOD OF ITS PREPARING | 2000 |
|
RU2167525C1 |
| BIOCIDE COMPOSITION AND METHOD OF ITS PREPARING | 2001 |
|
RU2183973C1 |
| METHOD FOR PRODUCTION OF BIOCIDE COMPOSITION | 2003 |
|
RU2260278C2 |
| METHOD OF PREPARING MIXING OF WATER-SOLUBLE MULTIHYDRIC ALCOHOL BORIC ESTERS | 2000 |
|
RU2169733C1 |
| METHOD FOR PRODUCTION OF ANTISEPTIC AGENT FOR PROTECTION OF WOOD | 1992 |
|
RU2054429C1 |
| METHOD OF PRODUCING WOOD ANTISEPTIC "BOROKSAN" | 2013 |
|
RU2513017C1 |
| METHOD OF ISOBUTENYLCARBONYL ISOLATION FROM THE FRACTION OF RECURRENT 4,4-DIMETHYLDIOXANE-1,3 | 1990 |
|
RU2028285C1 |
| ISOPRENE PRODUCTION PROCESS | 2000 |
|
RU2177469C1 |
| WATER-SOLUBLE FUNGICIDAL COMPOSITION FOR WOOD AND WOOD MATERIALS | 2012 |
|
RU2528680C2 |
| METHOD FOR PRODUCING ISOPRENE | 2020 |
|
RU2765441C2 |
