- Preparation method of TEMPO-4-ammonium chloride
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The invention relates to the field, and particularly provides a preparation method of TEMPO-4-ammonium chloride, the preparation method comprises the following steps: S1, triacetonamine and dimethylamine are added into water, and then a hydrogenation catalyst is added for hydrogenation reduction reaction to obtain N, N, 2, 2, 6, 6-hexamethylpiperidyl-4-amine; s2, under the action of a catalyst, the N, N, 2, 2, 6, 6-hexamethyl piperidyl-4-amine and hydrogen peroxide are subjected to an oxidation reaction in a solvent, and N, N, 2, 2, 6, 6-hexamethyl piperidyloxy-4-amine is obtained; s3, N, N, 2, 2, 6, 6-hexamethylpiperidyloxy-4-amine is added into the aprotic solvent, then chloromethane is introduced, and the target product TEMPO-4-ammonium chloride is obtained through a reaction, the raw material conversion rate is high, the solvent is green and environmentally friendly and can directly enter the next step for oxidation reaction operation; the whole reaction process is simple and easy to operate, the purification steps are few, the product purity is high, the cost is low, atoms are economical, and the concept of green production is met.
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Paragraph 0012; 0035-0036; 0045; 0048
(2021/11/21)
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- Hindered phenol-containing hindered amine light stabilizer, and preparation method and application thereof
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The invention discloses a hindered amine light stabilizer containing hindered phenol. The structural formula of the hindered amine light stabilizer containing hindered phenol is shown as a formula I which is described in the specification. Compared with existing hindered amine light stabilizer containing hindered phenol, the hindered amine light stabilizer containing hindered phenol has a better effect of slowing down aging or degradation caused by light, heat or oxidation, and can better prolong the service life of a coating and a paint film. The invention also discloses a preparation methodand application of the hindered amine light stabilizer.
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Paragraph 0054-0056
(2020/12/14)
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- Hindered amine light stabilizer intermediate, and preparation method and application thereof
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The invention discloses a hindered amine light stabilizer intermediate. The structural formula of the hindered amine light stabilizer intermediate is shown as a formula I which is described in the specification. In the formula I, R is a C1-C4 alkyl group. The light stabilizer intermediate disclosed by the invention can be used for synthesizing polyester fibers, and the light stability of the fibers is increased or improved by supplementing hindered amine functional groups outside a main chain. The invention also discloses a preparation method and application of the light stabilizer intermediate.
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Paragraph 0018; 0037-0066
(2020/12/14)
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- MATERIALS FOR USE IN AN AQUEOUS ORGANIC REDOX FLOW BATTERY
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Described herein are aqueous organic redox flow batteries that include a first redox active material that can include a metallocene or a salt thereof, and a second redox active material that can include a viologen or a salt thereof. The aqueous organic re
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Paragraph 0311; 0312
(2018/05/15)
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- An Aqueous Redox-Flow Battery with High Capacity and Power: The TEMPTMA/MV System
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Redox-flow batteries (RFB) can easily store large amounts of electric energy and thereby mitigate the fluctuating output of renewable power plants. They are widely discussed as energy-storage solutions for wind and solar farms to improve the stability of the electrical grid. Most common RFB concepts are based on strongly acidic metal-salt solutions or poorly performing organics. Herein we present a battery which employs the highly soluble N,N,N-2,2,6,6-heptamethylpiperidinyl oxy-4-ammonium chloride (TEMPTMA) and the viologen derivative N,N′-dimethyl-4,4-bipyridinium dichloride (MV) in a simple and safe aqueous solution as redox-active materials. The resulting battery using these electrolyte solutions has capacities of 54 Ah L?1, giving a total energy density of 38 Wh L?1at a cell voltage of 1.4 V. With peak current densities of up to 200 mA cm?2the TEMPTMA/MV system is a suitable candidate for compact high-capacity and high-power applications.
- Janoschka, Tobias,Martin, Norbert,Hager, Martin D.,Schubert, Ulrich S.
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supporting information
p. 14427 - 14430
(2016/11/11)
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- PROCESS FOR PREPARING AN N-METHYL-SUBSTITUTED TRIACETONAMINE COMPOUND
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An N-methyl-substituted triacetonamine compound is prepared by reacting at least one triacetonamine compound (I) with formaldehyde under reductive conditions, in the presence of hydrogen and in the presence of a supported catalyst, wherein the supported catalyst contains at least one metal M, wherein the metal M is selected from the group consisting of V, Cr, Mo, Mn, Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, and Cu.
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Paragraph 0558-0561
(2016/08/17)
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