Method for purifying piperonyl butoxide synthesized from sassafras oil

A technology of piperonyl butoxide and a purification method, applied in directions such as organic chemistry, can solve the problems of long operation period, difficult to control polymerization conversion, low yield and the like, and achieve the effects of short operation time, easy operation and high yield

Inactive Publication Date: 2005-02-16
TIANJIN UNIV
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separation and purification methods reported in the two patents of GB857541 and GB1344850 all use high vacuum rectification separation method. Due to the pressure drop of the rectification tower body and the inherent certain liquid holding capacity of the tower kettle, the whole system must reac

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] Add 100g piperonyl butoxide liquid mixture into the feeder of the molecular distillation device (feeder volume 250ml, evaporation area 0.048 square meters, film wiper speed 50~1000rpm), the active ingredient piperonyl butoxide content of the mixture is 46.37 %. Turn on the raw material preheating device, raise the temperature to 85°C, and maintain a constant temperature. Turn on the cooling device, keep the cooling temperature at 20°C, add liquid nitrogen into the cold trap, turn on the rotary vane vacuum pump and the oil diffusion pump, make the operating pressure of the system reach 0.1Pa, turn on the precision constant temperature tank for evaporating materials to conduct heat transfer oil Heating, so that the temperature is stable at the required evaporation temperature of 92 ° C, then start feeding, the feed rate is 100g / h, the rotating speed of the wiper is 140rpm, after the distillation process ends, distillate 41.2g, heavy fraction 58.8 g: Distill the heavy fra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a purification method of piperonyl butoxide synthetized from the sassafras oil and belongs to deep-processing technology of the sassafras oil. The method adopts the molecular distillation equipment and controls the pressure between 0.01Pa and 100Pa, the evaporating temperature between 90deg.C and 200deg.C, coolant temperature between -15deg.C and 80deg.C, the difference in temperature of the evaporator and the condenser between 30deg.C and 120deg.C and the milling speed between 10rpm and 1000rpm. The operational condition has two class separations. The purity of the piperonyl butoxide synthetized can reach above 98%. The invention is featured by the simple technique, short operation time, high yield, no other material with high boiling point during the reaction, no polymerization and no environmental pollution.

Description

technical field [0001] The invention relates to a method for purifying piperonyl butoxide synthesized from sassafras oil, which belongs to the deep processing and utilization technology of sassafras oil. Background technique [0002] Piperonyl butoxide is a very effective synergist for pyrethrin insecticides. It prevents insects from developing resistance by inhibiting the multifunctional oxidase of insects, thereby increasing the insecticidal effect. Patents such as WO02087337, CN1381181, GB2388778, RU2146090, GB829556, US3920440 (A1), US5883112, GB1415515 and US2904464 report the main application fields of piperonyl butoxide: piperonyl butoxide is added to pyrethrins and is mainly used in food in agriculture Prevention and control of crop pests such as cotton, fruits and vegetables; killing mosquitoes, flies and moths in clothing at home; protecting construction and textile materials by inhibiting moths; widely used in the food industry to kill and prevent production work...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07D317/54
Inventor 许松林应安国王淑华向爱双徐世民
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap