Synthesizing method of tetrabromobisphenol A dual (2,3-dibromo-2-methyl propyl) ether
A technology of tetrabromobisphenol and methyl propyl group, applied in the synthesis field of tetrabromobisphenol A bis(2,3-dibromo-2-methylpropyl) ether, can solve problems such as not being involved, To achieve the effect of easy control, low reaction temperature and high product purity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0021] Tetrabromobisphenol A and sodium hydroxide are added to water, the mol ratio of tetrabromobisphenol A and sodium hydroxide is 1:1, the amount of water used by tetrabromobisphenol A and sodium hydroxide is the same as that of tetrabromobisphenol A The molar ratio is 2:1; the first heat preservation is carried out after the complete dissolution at room temperature, and the time of the first heat preservation is 0.5h; the pH value is adjusted to 8-9, and the dispersant p-octylphenol polyoxyethylene ether is added to disperse The massfraction that agent accounts for tetrabromobisphenol A is 2%; Then dropwise add methallyl chloride in 1h, the mol ratio of methallyl chloride and tetrabromobisphenol A is 2:1; Carry out the second After the second heat preservation for 5 hours, the temperature was lowered to room temperature for suction filtration, the filter cake was washed with water three times the mass of tetrabromobisphenol A, and dried at 80°C to obtain an intermediate pro...
Embodiment 2
[0026] Tetrabromobisphenol A and sodium hydroxide are added to water, and the mol ratio of tetrabromobisphenol A and sodium hydroxide is 1:2, and the amount of water used for tetrabromobisphenol A and sodium hydroxide is the same as that of tetrabromobisphenol A. The molar ratio is 5:1; the first heat preservation is carried out after the complete dissolution at room temperature, and the time of the first heat preservation is 0.6h; adjust the pH value to 8-10, add dispersant sodium dodecylsulfonate, dispersant Accounting for the mass fraction of tetrabromobisphenol A is 3%; then dropwise add methallyl chloride in 2h, the molar ratio of methallyl chloride and tetrabromobisphenol A is 3:1; carry out the second Insulate for 6 hours, cool down to room temperature and filter with suction, wash the filter cake with water 4 times the mass of tetrabromobisphenol A, and dry at 80°C to obtain an intermediate product.
[0027] Add the intermediate product to the organic solvent chlorofor...
Embodiment 3
[0029] Tetrabromobisphenol A and sodium hydroxide are added to water, the mol ratio of tetrabromobisphenol A and sodium hydroxide is 1:3, the amount of water used by tetrabromobisphenol A and sodium hydroxide is the same as that of tetrabromobisphenol A The molar ratio is 10:1; the first heat preservation is carried out after the complete dissolution at room temperature, and the time of the first heat preservation is 0.7h; the pH value is adjusted to 8-9, and the dispersant sodium stearate is added, and the dispersant accounts for tetrabromo The mass fraction of bisphenol A is 4%; Then dropwise add methallyl chloride in 3h, the molar ratio of methallyl chloride and tetrabromobisphenol A is 2.5:1; Carry out second insulation 7h, Cool down to room temperature and filter with suction, wash the filter cake with water 5 times the mass of tetrabromobisphenol A, and dry at 80°C to obtain an intermediate product.
[0030] Add the intermediate product to the organic solvent dichloroeth...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com