Polymeric sorbents for aldehydes
A technology of adsorbents and polymers, applied in alkali metal compounds, alkali metal oxides/hydroxides, other chemical processes, etc.
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Embodiment 1-4
[0291] In a 5L round bottom flask, 78.2 g (481 mmol) of divinylbenzene (DVB) (80% by weight, technical grade), 29.4 g (300 mmol) of maleic anhydride (MA) and 2.15 g (8.88 mmol) of benzoyl peroxide (BPO) was dissolved in 2153 g of ethyl acetate (EtOAc). The polymerizable composition had a percent solids of 4.9% by weight in EtOAc and contained a monomer mixture (58.1% by weight DVB, 27.3% by weight MA, and 14.5% by weight styrenic monomers) and 2% by weight BPO (based on monomer total weight). Nitrogen was bubbled through the polymerizable composition for 30 minutes. The flask was then capped with a rubber septum and placed in a 95°C sand bath. The polymerizable composition was heated at this elevated temperature for 18 hours. The white precipitate formed was isolated by vacuum filtration and washed with EtOAc. The solids were dispensed and placed into three 32 oz. jars. Each jar was then filled with 750 mL of EtOAc. The solid was allowed to stand in EtOAc for 1 h at room...
Embodiment 5-8
[0306] A series of four precursor polymer materials were prepared using different ratios of the monomers DVB (80 wt% purity, technical grade) and MA. The polymerizable composition used to prepare each precursor polymer material had a percent solids in EtOAc of 5.0 wt. % and 2.0 wt. % of BPO (based on the total weight of monomers). The monomer composition by weight of each precursor polymer material is shown in Table 5. These four precursor polymer materials were prepared using the following procedure. Nitrogen was bubbled through each polymerizable composition for 10 minutes. Each jar was then capped and placed in a 95°C sand bath. Each polymerizable composition was heated at this elevated temperature for 17 hours. A white precipitate formed in each jar was isolated by vacuum filtration and washed with EtOAc. Each solid was placed in a 4 oz jar and 100 mL of EtOAc was added to the jar. Each solid was allowed to stand in EtOAc at room temperature for one hour. The solids ...
Embodiment 9-13
[0316] A series of five unhydrolyzed precursor polymeric materials were prepared using different ratios of monomers DVB (80% by weight, technical grade) and MA and different percent solids of the polymeric composition. The polymerizable composition used to prepare each precursor polymer material had 2.0% by weight BPO (based on the total weight of monomers). The monomer composition and percent solids by weight of each precursor polymer material are shown in Table 8. These four precursor polymer materials were prepared using the following procedure. Nitrogen was bubbled through each polymerizable composition for 10 minutes. Each jar was then capped and placed in a 95°C sand bath. Each polymerizable composition was heated at this elevated temperature for 17 hours. A white precipitate formed in each jar was isolated by vacuum filtration and washed with EtOAc. Each solid was placed in a 4 oz jar and 100 mL of EtOAc was added to the jar. Each solid was allowed to stand in EtOA...
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