Reference

Concentrated solutions of anthraquinone dyes for coloring of petroleum products

Concentrated solutions of anthraquinone dyes for coloring of petroleum products. Marangelli, Ugo; Ciocci, Giancarlo; Papa, Sisto Sergio (ACNA-Aziende Colori Nazionali Affini S.p.A., Italy). Eur. Pat. Appl. EP 95975 A1 7 Dec 1983, 8 pp. DESIGNATED STATES: R: BE, DE, FR, GB, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C10L001-22; C09B001-32. APPLICATION: EP 83-401041 25 May 1983. PRIORITY: IT 82-21506 27 May 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 51 Anthraquinone dyes (I; R, R1 = C8-20 alkyl) are prepd. as concd. (30-50 wt.%) blue-green solns. for coloring liq. petroleum products and org. solvents. 128-95-0 and 108-88-3 which are cas registry numbers are also used here. In addn. to their high soly., I are more difficult to ext. from fuels, etc. than homologous dyes in which R and R1 are H or Me. Thus, a mixt. of quinizarin [81-64-1] 0.1, leucoquinizarin [476-60-8] 0.05, H3BO3 0.675, and 4-n-dodecylaniline [104-42-7] 0.45 mol in 75 g isobutanol [78-83-1] was heated at 105° for several h, cooled to room temp., dild. with 100 g xylene [1330-20-7], washed with several 100-g portions of H2O, and sepd. from the aq. layer to give 250 g blue soln. contg. 40 wt.% dye [42887-22-9]. Other dye solns. were similarly prepd. .

Molecular aggregate with ordered structure

Kunitake, Toyoki; Okahata, Yoshio (Asahi Chemical Industry Co., Ltd., Japan). Ger. Offen. DE 2917131 15 Nov 1979, 67 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07C119-10; C07C093-06; C07C043-26; C11D003-00. PRIORITY: JP 78-49736 28 Apr 1978. DOCUMENT TYPE: Patent CA Section: 46 (Surface Active Agents and Detergents) Section cross-reference(s): 25 Seventeen surfactants with the structure I or II, where R = C7 or C12 alkyl or alkoxy, R1 = N+Me3Br-, O(CH2)nN+Me3Br- (n = 4 or 10), O(CH2CH2O)nH (av. n = 10 or 20), or OP(O)(OH)2, and Z = O, CO, CMe2, or a direct bond and 6 similar surfactants are prepd. Each surfactant mol. contains hydrophilic and hydrophobic groups sepd. by a rigid portion at least 1 nm long. In soln. the surfactants form mol. aggregates with ordered structures and are useful in selective permeation and retention processes and for accelerating or retarding chem. reactions. Thus, an equimolar mixt. of p-dodecylaniline [104-42-7] and p-(HCO)C6H4O(CH2)4N+Me3Br- [72617-53-9] in EtOH contg. HOAc was refluxed to give I [R = p-dodecyl, R1 = p-[Br-N+Me3(CH2)4O]] [72617-54-0]. Electron microscopy indicated the surfactant had an ordered structure in solns.