- Dual catalytic activity of amberlyst-15 in the large-scale and sustainable synthesis of dioctyl sodium sulfosuccinate (DOSS)
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Dioctyl sodium sulfosuccinate (DOSS) as a unique material both as a drug and surfactant was synthesized by a facile and economical synthetic method. In this project, Amberlyst-15 was select-ed as a heterogeneous recyclable bronsted solid acid for this synthesis both in the esterification of ma-leic anhydride and sulfonation of dioctyl maleate (DOM) ester. This catalyst was easily recovered and reused at least for 13 consecutive cycles without a significant loss in the catalytic activity. In this paper, we wish to uncover a catalytic approach for the synthesis of DOSS through a recyclable, easily recov-erable, and commercially available catalyst, namely Amberlyst 15, under mild conditions.
- Fateh, Davod S.,Moghadam, Seyed M. M.,Salehi, Samie,Tarin, Mojtaba
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p. 555 - 559
(2020/07/17)
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- Method for producing maleic acid disooctyl sodium sulfonate
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The invention provides a method for producing maleic acid disooctyl sodium sulfonate. The method adopts maleic anhydride and isooctanol as raw materials and comprises the following steps: (1) by taking a halogen-containing strong-acidity resin and a sulfonic acid agent as catalysts, synthesizing maleic acid disooctyl; and (2) performing sulfonation by using a liquid sulfonation agent. By adoptingthe process method provided by the invention, the esterification reaction velocity can be increased, energy conservation and consumption reduction can be achieved, meanwhile, the chromaticity of a product can be reduced, the catalysts are easy to recycle and reuse, and the effective utilization rate of the sulfonation agent can be increased. The method is simple and easy to operate, is safe and environment-friendly and is good in permeability, stable in quality and easy in on-scale industrial production, and the chromaticity of the product is less than or equal to 20Hazen.
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Paragraph 0019-0028
(2019/12/25)
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- Salts of alkyl esters of sulfonated dicarboxylic acids and compositions containing same
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A salt of a mono- and/or dialkyl ester of a sulfonated dicarboxylic acid is provided, where the dicarboxylic acid contains 4 to 8 carbon atoms and the alkyl groups are derived from 2-propylheptanol. A composition including (a) one or more salt(s) of a mono- and/or dialkyl ester(s) of a sulfonated dicarboxylic acid(s), where the dicarboxylic acid contains 4 to 8 carbon atoms and the alkyl groups are derived from 2-propylheptanol; and (b) one or more organic solvents liquid at 20° C. with a boiling point above 250° C. at 1 bar is also provided.
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Page/Page column 4
(2011/08/03)
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- Microstructure and magnetic properties of colloidal cobalt nano-clusters
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The magnetic response of nanometer sized Co nanoparticles (NP) prepared using reverse micelle solutions are presented. The use of complementary structural and morphological probes (like transmission electron microscopy, high resolution electron microscopy, X-ray absorption spectroscopy) allowed to relate the magnetic properties to the size, morphology, composition and atomic structure of the nanoparticles. All data agree on the presence of a coreshell structure of NPs made of a metallic Co core surrounded by a thin Co-oxide layer. The coreshell microstructure of NPs affects its magnetic response mainly raising the anisotropy constant.
- Torchio,Meneghini,Mobilio,Capellini,Garcia Prieto,Alonso,Fdez-Gubieda,Turco Liveri,Longo,Ruggirello,Neisius
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scheme or table
p. 3565 - 3571
(2011/01/10)
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- Stable emulsion and process for preparing the same
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The invention relates to a stable emulsion comprising (a) an oil; (b) water; (c) a surfactant; and (d) solid particulate material, wherein an emulsion comprising the oil, water, and the surfactant has a transitional phase inversion point, wherein the stable emulsion contains droplets having a d50 value of below 1 μm, and wherein the shelf life time of an emulsion comprising compounds (a) to (d) is longer than the shelf life time of emulsions containing only compounds (a) to (c).
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- NOVEL FORMULATION OF DEHYDRATED LIPID VESICLES FOR CONTROLLED RELEASE OF ACTIVE PHARMACEUTICAL INGREDIENT VIA INHALATION
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A new formulation of dehydrated lipid vesicles employs a vesicle preserver and permits the control of release and delivery of active pharmaceutical ingredients into the respiratory system for treatment in particular of asthma. The typical formulation provides controlled release of the active pharmaceutical ingredient from 0% to 100% from 0 to 72 hours after inhalation, changes the systemic administration to topical administration, allows prolonged therapeutic period for one administration, increased stability, with reduced dose, reduced systemic side effects, reduced toxicity.
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- Triazolopyrimidines
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Novel triazolopyrimidines of the formula in which R1, R2, R3 and X have the meanings given in the description, a process for preparing these novel substances and their use for controlling undesirable microorganisms and animal pests. Novel amines of the formula in which R4 has the meanings given in the description, and processes for their preparation.
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- Use of riboflavin and flavin derivatives as chitinase inhibitors
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The invention relates to the use of riboflavin and of flavin derivatives with chitinase-inhibitory action for controlling arthropods, nematodes and chitin-containing fungi.
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- Optically active surfactants - I - The first synthesis and properties of sodium bis [(S) ethyl-2-hexyl] sulfosuccinates ('Aerosol OT')
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Optically pure (S) ethyl-2-hexan-1-ol (S)4 is prepared for the first time from (S) ethyl-2-hexanoic acid. Nucleophilic addition of sodium bisulfite on the bis [(S) ethyl-2-hexyl] maleate gives rise to an equimolar mixture of two optically active sodium bis [(S) ethyl-2-hexyl] sulfosuccinates diastereoisomers. The critical micelle concentration of these new optically active surfactants is almost identical to those of the well known racemic 'Aerosol OT'.
- Larpent,Chasseray
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p. 3903 - 3914
(2007/10/02)
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- Methods and compositions for treating viral infection
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Methods and compositions are provided for treating selected viral infections wherein the anti-virally active ingredient is a compound of the following formula: STR1 wherein R' and R are each independently a straight chain or branched chain alkyl group having from 5 to 8 carbon atoms, M is NH4, Na, K or Ca, and x is 1 when M is NH4, Na or K, and x is 2 when M is Ca.
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- Fungicidal carbamates of triazole ethanols (or ethenols)
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2-(Methoxycarbonylamino)-1H-benzimidazole-1-carboxylic acid esters such as with 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)-2-butanol are effective in controlling plant fungus diseases.
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