19037-74-2Relevant articles and documents
Preparation of bis-quaternary ammonium salts from epichlorohydrin
Kim, Tae-Seong,Hirao, Toshikazu,Ikeda, Isao
, p. 67 - 71 (1996)
A novel bis-quaternary ammonium salt was prepared conveniently and almost quantitatively from N,N-dimethyldodecylamine, its hydrochloride, and epichlorohydrin. Reaction of N,N-dimethyldodecylamine with epichlorohydrin (in the presence of the amine hydrochloride) or various dichloro compounds was investigated by using 1H nuclear magnetic resonance. The reaction route was studied by examining the reactivity of reagents with the amine and the effect of reaction temperature. The ease of the reaction with epichlorohydrin was found to be due to the assistance of amine hydrochloride in opening the epoxide ring and to neighboring-group participation by the hydroxyl group of the intermediate mono-ammonium salt in the quaternization step. Neighboring-group participation by the hydroxyl group in these quaternization reactions is also discussed.
A gemini amphophilic phase transfer catalyst for dark singlet oxygenation
Borde, Cedric,Nardello, Veronique,Wattebled, Laurent,Laschewsky, Andre,Aubry, Jean-Marie
, p. 652 - 658 (2008)
A new gemini surfactant phase transfer catalyst, namely diethyl-ether-a,w-bis-(dimethyldodecylammonium molybdate) codified as 12-EO-12-Mo, was prepared by anion exchange from the analogous gemini dichloride (12-EO-12-Cl2). The physico-chemical properties of these compounds such as Krafft temperature, critical micelle concentration, surface activity and binary water-surfactant behavior were compared and the influence of the molybdate counterion was examined. Though both compounds are highly hydrophilic, the cmc of 12-EO-12-Mo (0.4 mmol L-1) is about five times lower than of its dichloride analogue (2.2 mmol L-1). Moreover, 12-EO-12-Mo exhibits an additional cubic liquid crystal phase between 53 and 64 wt%. The usefulness of 12-EO-12-Mo as an amphiphilic phase transfer catalyst for the dark singlet oxygenation was demonstrated with the peroxidation of two typical organic substrates: α-terpinene which reacts with 1O 2 according to a [4 + 2] cycloaddition and the less reactive β-citronellol, which provides two hydroperoxides according to the ene-reaction. 12-EO-12-Mo provides a simple reaction medium with only three components for the preparative peroxidation of hydrophobic substrates by chemically generated singlet oxygen. Copyright
Method for preparing diethyl ether-alpha, omega-double long-chain alkyl dimethyl ammonium chloride surfactant
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Paragraph 0041-0043; 0050-0052, (2019/01/21)
The invention relates to a method for preparing a diethyl ether-alpha, omega-double long-chain alkyl dimethyl ammonium chloride surfactant. A solvent and a basic catalyst are added to a reactor, dichloroethyl ether is added to a dropping funnel, when the dropping temperature is reached, the dichloroethyl ether is added dropwise to the reactor, the reaction is carried out under stirring condition to obtain the product diethyl ether-alpha, omega-double long-chain alkyl dimethyl ammonium chloride surfactant, the obtained liquid product is evaporated to remove the solvent, washed with diethyl ether, and then vacuum dried with acetone to obtain a product. The method has the advantages of short reaction time and high yield.
A treating agent temp.and for water treatment and preparation method thereof
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Paragraph 0034-0036, (2017/03/17)
The invention relates to a biological slime treating agent for water treatment and a preparation method of the biological slime treating agent. The biological slime treating agent comprises the following components in percentage by weight: 5-30% of 1-(2-thiocyano)ethyl-2-methyl-3-benzyl-5-nitroimidazole, 5-10% of N,N-bis(dodecyldimethyl)-3-oxa-1,5-pentadiammonium dichloride, 5-10% of dithiocyanomethane, 1-10% of isothiazolinone, 1-10% of organochlorine, 5-40% of a solvent and the balance of water. The preparation method of the biological slime treating agent is as follows: at room temperature, adding 1-(2-thiocyano)ethyl-2-methyl-3-benzyl-5-nitroimidazole, N,N-bis(dodecyldimethyl)-3-oxa-1,5-pentadiammonium dichloride and water into a reactor, adjusting the pH value to less than 6 with hydrochloric acid, adding an alcohol solvent, uniformly stirring, adding isothiazolinone and organochlorine and stirring until isothiazolinone and organochlorine are completely dissolved to obtain the biological slime treating agent. The biological slime treating agent has good bactericidal property, can be widely used in industrial circulating water treatment and especially can be suitable for controlling the breeding of bacteria such as SRB in an oily wastewater system of an oilfield.
