- Size and Shape of Micelles in the Ternary System n-Dodecylbetaine/Water/1-Pentanol
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The phase diagram of the system n-dodecylbetaine/water/1-pentanol is first presented.The use of several experimental techniques, namely (principally) small-angle X-ray scattering and fluorescence probe studies, allows us to obtain the size and the shape of the micelles in the L1 phase.It is shown that the most probable shape corresponds to elongated aggregates, the self-consistency of the results leading to exclude the other shapes.
- Marignan, J.,Gauthier-Fournier, F.,Appell, J.,Akoum, F.,Lang, J.
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- Synthesis and properties of gallate ionic liquids
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An efficient method for the synthesis of novel antioxidants in the form of ionic liquids (ILs) was described in the framework of this study. The ILs were obtained by the reaction of quaternary ammonium hydroxides with gallic acid as well as the protonatio
- Czerniak, Kamil,Biedziak, Agnieszka,Krawczyk, Krzysztof,Pernak, Juliusz
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- Lauryl betaine preparation method
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The present invention discloses a lauryl betaine preparation method, which comprises: a, adding ethyl 2-(p-toluenesulfonyloxy)acetate andacetone or methanol to a reactor, and completely and uniformly stirring to obtain a mixture; b, adding dodecyl dimethyl dimethylamine to the mixture in a dropwise manner while stirring, and heating and carrying out a complete stirring reaction after completing the adding; c, after completing the substitution reaction, distilling under a conventional atmospheric pressure to remove half of the solvent, adding p-toluenesulfonic acid aqueous solution having a mass concentration of 15-20%, and continuously heating and carrying out the stirring reaction; and d, after completing the hydrolysis reaction, distilling to remove the majority of the solvent, removing impurity ions from the residue by using an ion-type macroporous adsorption resin to obtain a lauryl betaine aqueous solution, and distilling under a conventional atmospheric pressure to remove the water to obtain the viscous liquid lauryl betaine. According to the present invention, with the method, the high quality lauryl betaine can be prepared, and the product equipment corrosion loss can be reduced.
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Paragraph 0013; 0024; 0025; 0026; 0027; 0028; 0029-0065
(2017/06/02)
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- AMPHOTERIC BETAINE COMPOUNDS
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Disclosed are a variety of amphoteric compounds containing a quaternary nitrogen group, a covalently bound counterion, and an ester or amide group. These amphoteric compounds can be advantageously prepared via a chemoenzymatic green process, and exhibit good surfactant properties.
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Paragraph 0170-0173
(2017/04/11)
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- Gel emulsifier midbody N - dodecyl betaine apparatus for producing
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The utility model provides a gel emulsifier midbody N dodecyl betaine apparatus for producing mainly includes: 12 tertiary amine storage tanks, feedstock pump, neutralizing tank are in, and pump, reation kettle, finished product pump, relation of connection between this apparatus for producing component parts does: 12 tertiary amine storage tanks are connected with feedstock pump, and feedstock pump is connected with reation kettle, and reation kettle is connected with the pump in with is connected with the neutralizing tank with the pump in, and reation kettle is connected with finished product pump, wherein, are 12 tertiary amine storage tanks horizontal tank, full volume 6.9 8.11m3, diameter of drum 1300 - 1650mm, 2650 - 4700mm of length, head thickness 8.1 - 8.9mm, is feedstock pump single -stage and single -suction centrifugal pump, rotational speed 2800 2890rmin, flow 7.9 11.5m3h, lift 32.5 34m, power 1.47 2.01KW, reation kettle nominal volume 620 does 900L press from both sides cover capacity 295 530L, the outer pot diameter 1150 1300mm, agitation speed 63 75rmin.
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Paragraph 0013; 0014; 0015; 0016; 0017; 0018
(2017/01/12)
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- Production method of gel emulsifier intermediate N-dodecyl betaine
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The invention relates to a production device of gel emulsifier intermediate N-dodecyl betaine. The production device mainly comprises a dodecyl dimethyl tertiary amine storing tank, a feed pump, a neutralization tank, a neutralization pump, a reaction kettle and a finished product pump in such a connection relation that the dodecyl dimethyl tertiary amine storing tank is communicated with the feed pump, the feed pump is communicated with the reaction kettle, the reaction kettle is communicated with the neutralization pump, the neutralization pump is communicated with the neutralization tank, and the reaction kettle is communicated with the finished product pump, wherein the dodecyl dimethyl tertiary amine storing tank is a horizontal storing tank, the total volume of the dodecyl dimethyl tertiary amine storing tank is 6.9-8.11m, the diameter of a cylinder is 1300-1650mm, the length is 2650-4700mm, and the thickness of a seal head is 8.1-8.9mm; the feed pump is a single-level single-suction centrifugal pump, the rotational speed is 2800-2890r/min, the flow is 7.9-11.5m/h, the pumping head is 32.5-34m, and the power is 1.47-2.01KW; the nominal volume of the reaction kettle is 620-900L, the capacity of a jacket is 295-530L, the diameter of an outer pot is 1150-1300mm, and the stirring speed is 63-75r/min.
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Paragraph 0011-0014
(2017/04/03)
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- Synthesis of some acyclic quaternary ammonium compounds. Alkylation of secondary and tertiary amines in a two-phase system
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A series of acyclic symmetrical and asymmetrical quaternary ammonium chlorides of the general formula R1R2R3N+AR4Cl- (R1 = Me, Bu; R2 = n-C12H25, PhCH2, C n H2n+1(OCH2CH2) m, n = 9 and 12, m = 1 and 2; R3 = n-C12H25, PhCH2, HOCH2CH2,-OOCCH2; R4 = n-C12H25, PhCH2; A = (CH2CH2O)1,2, CH2C(O)O) was synthesized by the alkylation of tertiary amines in a two-phase system containing water. A convenient method for the synthesis of the initial symmetrical and asymmetrical tertiary amines of the general formula MeNR1R2 (R1 = Me, Bu; R2 = n-C12H25, PhCH2, CnH2n+1(OCH2CH2) m, n = 9 and 12, m = 1 and 2) in an organic phase-aqueous phase heterogeneous system, which allows the use of aqueous solutions of alkali and amines, was developed. The improved method for the preparation of intermediate ethylene glycol and diethylene glycol monoethers is monoalkylation of glycols in dioxane using solid KOH in a two-phase system.
- Kharlamov,Artyushin,Bondarenko
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p. 2445 - 2454
(2015/08/03)
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- CONTINUOUS METHOD FOR MANUFACTURING BETAINE AQUEOUS SOLUTION
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The present invention relates to a method for continuously preparing a betaine aqueous solution, including the reaction of an amine with an ω-halocarboxylic acid, in the presence of water and a base. Said method is characterized in that it is carried out in a device consisting of at least two consecutive reactors (R1) and (R2), the reactor (R2) being a tubular reactor.
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Paragraph 0139
(2013/03/28)
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- AMINO- OR AMMONIUM-CONTAINING SULFONIC ACID, PHOSPHONIC ACID AND CARBOXYLIC ACID DERIVATIVES AND THEIR MEDICAL USE
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The present invention relates to amino- or ammonium-containing sulfonic acid, phosphonic acid and carboxylic acid derivatives, in particular the compounds of formula 1, 2, 3, 4, 5 or 6, and their medical use, including their use in the treatment, prevention or amelioration of an inflammatory, autoimmune and/or allergic disorder.
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Page/Page column 42
(2012/12/13)
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- Synthesis of novel 5'-uridine-head amphiphiles as model for DNA molecular recognition
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Here we describe uridine functionalization in the 5' position, which provides new classes of cationic and nonionic amphiphiles specifically designed as DNA transfection agents. The synthetic procedures developed to obtain the cationic uridine-head surfactants prevented intramolecular cyclization that occurs when uridine is functionalized in this position without using protecting groups in the uracil.
- Tiecco, Matteo,Di Profio, Pietro,Germani, Raimondo,Savelli, Gianfranco
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scheme or table
p. 911 - 923
(2010/09/04)
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- Differences in proton-proton coupling constants of N+-CH2-CH2 protons of some betaines, N+-(CH2)2-3-COO-, and their complexes in aqueous solution
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Synthesis and 1H NMR spectra in D2O of 4 betaines and 19 betaine complexes with mineral acids containing 2 or 3 CH2 groups in the tether, N+-(CH2)n-COO-, n=2,3, and diverse volume of the positively charged groups are reported. In compounds containing three CH2 groups in the tether and three substituents at the nitrogen atom or α, α′-disubstituted pyridine ring, a characteristic multiplet for an AA′MM′X2 spin system is observed. This is consistent with preference for trans conformation (68-85%). In the spectra of compounds with two CH2 groups in the tether or three CH2 groups and unsubstituted pyridine ring, the multiplet changes to a triplet and gives apparent A2X2 and A2M2X2 spectra, respectively, consistent with no significant conformational preference. Both the number of CH2 groups in tether and the bulkiness of the charged groups are responsible for the observed differences of N+CH2 multiplicity and reflect changes in conformational preferences. According to the PM3 calculations, in the gas phase a gauche-like conformer is more stable than the trans, but in aqueous solution it is reverse.
- Szafran, Miroslaw,Dega-Szafran, Zofia,Nowak-Wydra, Barbara,Pietrzak, Mariusz
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p. 555 - 564
(2007/10/03)
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- "Shnelle Spaltung von Amidbindungen" oder reproduzierbare, konzentrations- und zeitabhaengige Aggregation anionischer und kationischer Tenside?
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Keywords: Amidhydrolyse; Anionen-Kationen-Tensidaggregation; Enzymmimetica; Tenside
- Fife, Wilmer K.,Liu, Shangao
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p. 2946 - 2948
(2007/10/03)
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- REACTIONS OF BETAINE ESTERS WITH HYDROXIDE ION IN REACTIVE AND UNREACTIVE COUNTERION SURFACTANT
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The reaction of hydroxide ion with methyl N-alkyl-N,N-dimethylglycinate (1) is catalysed by cationic micelles.The variation of the first-order constant, kψ, with the concentration of CTACl can be fitted to the pseudophase ion-exchange model, but this model fails when the counterion of the surfactant is OH(1-).The variations of kψ with counterion of CTAOH fit a kinetic model in which the distribution of the OH(1-) between the aqueous and micellar pseudophase depends upon .The value for the second-order rate constant in the micellar pseudophase predicted by both models is similar and it is smaller than the second-order rate constants in water.
- Al-Lohedan, Hamad A.
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p. 345 - 350
(2007/10/02)
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- Micellar Effects upon the Reaction of Betaine Esters with Hydroxide Ion
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The reaction of hydroxide ion with methyl N,N,N-trimethylglycinate (1a) is inhibited by cationic micelles of C14H29NMe3Cl and C16H33NMe3Cl (MTACl and CTACl) besause the substrate is largely in the aqueous pseudophase which is depleted in OH- by the cationic micelles.Added Cl- displaces OH- from the micelles and decreases micellar inhibition.The corresponding reaction of methyl N-dodecyl-N,N-dimethylglycinate (1b) is catalyzed by both MTACl and CTACl which bind both reactants, but this catalysis is reduced by NaCl.Self-micellization of methyl N-hexadecyl-N,N-dimethylglycinate (1c) speeds reaction with OH-, and the rate constants reach plateau values with increasing substrate concentration and are independent of OH-.But addition of either CTACl or NaCl slows reaction because Cl- displaces OH- from the micelle.These diverse rate effents can be accounted for quantitatively in terms of the pseudophase ion-exchange model, which considers reactions in both the aqueous and micellar pseudophases and the distribution of both reactants between the pseudophases.
- Al-Lohedan, Hamad,Bunton, Clifford A.,Romsted, Laurence S.
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p. 2123 - 2129
(2007/10/02)
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