38results about How to "Rapid and complete biodegradation" patented technology

The invention provides a composite of vegetable insulating oil and modified nano powder and application and preparation method thereof. The composite comprises vegetable insulating oil and nano powder, and the composite is used for preparing insulating oil. The preparation method includes the following steps: surface treatment is carried out on the nano powder; vegetable insulating oil subject towater removal and gas removal is mixed with the nano powder subject to surface treatment; the mixed insulating oil is subject to ultrasonic oscillation; and mixture obtained by oscillation treatment is added into a planet ball mill, and wet grinding is carried out. In the invention, nano powder is added into vegetable insulating oil, nano liquid dielectric medium can be formed, not only the dielectrical property of insulating oil can be improved, but also heat dissipation function of transformer winding coil can be improved; and the nano powder is far smaller than foreign particle in the insulating oil and can form stable sol system with the liquid dielectric medium, and a breakdown bridge can not be formed under the action of external electric field, thus improving the dielectrical strength of insulating oil.

The invention discloses a water-base oil dirt cleaning agent and a preparation method thereof, wherein the water-base oil dirt cleaning agent has the characteristics of being strong in cleaning capability, excellent in biodegradation, low in preparation cost, environmentally-friendly, efficient and the like, and is specifically suitable for cleaning heavy oil dirt on the road pavement. The water-base oil dirt cleaning agent consists of the following components in weight proportion: 2-7% of anionic surfactant, 2-8% of nonionic surfactant, 1.5-3% of triethanolamine, 1-3% of trisodium citrate and the balance of water, wherein the anionic surfactant is preferably selected from two or three of alpha-vinyl sodium sulfonate (AOS), sodium dodecyl benzene sulfonate (LAS) and sulfonate of fatty acid methyl ester ethoxylate (FMES); and the nonionic surfactant is preferably selected from one or two of fatty alcohol-polyoxyethylene ether (AEO-9) and cocamidopropyl betaine (CAB).

The invention provides a preparation method of insulating oil taking vegetable oil as raw material, which comprises the following steps of: 1) neutralizing the vegetable oil with alkali; 2) conducting reduced pressure distillation on the vegetable oil after being neutralized with alkali; 3) hydrogenating the vegetable oil after the reduced pressure distillation; 4) conducting deep refinement to the hydrogenated vegetable oil: adding citric acid which accounts for 0.3 to 1.0 percent of the weight of the vegetable oil to the hydrogenated vegetable oil, conducting reduced pressure distillation for 1 to 2 hours at the pressure of 20 to 50 mmHg and the temperature of 80 to 90 DEG C; and then adding bentonite which accounts for 0.1 to 0.3 percent of the weight of the vegetable oil, conducting reduced pressure distillation for 1 to 2 hours at the pressure of 20 to 50 mmHg and the temperature of 80 to 90 DEG C; 5) conducting reduced pressure distillation again to the vegetable oil after the deep refinement; and 6) adding an additive to the vegetable oil being treated with the reduced pressure distillation again.