Reference

Desulfurization of residua with sodamide-hydrogen and regeneration of sodamide

Desulfurization of residua with sodamide-hydrogen and regeneration of sodamide. Baird, William Chalmers, Jr.; Bearden, Roby, Jr.; Bollinger, Ralph Louis, Jr. (Exxon Research and Engineering Co., USA). U.S. US 4017381 12 Apr 1977, 12 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C10G023-00. NCL: 208143000. APPLICATION: US 75-571955 28 Apr 1975. DOCUMENT TYPE: Patent CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 49, 72 The desulfurization, conversion, and upgrading of whole or topped crude oils and petroleum residues in the presence of NaNH2 [7782-92-5] and H, were described. The Na2S was regenerated by conversion to a S-depleted Na polysulfide, NaNO3, or NaCl and electrolysis, in the presence of NH3, to form NaNH2. Thus, in hydrodesulfurization of 97.6 g of Safaniya atm. residue (4.0 wt. % S, Ni 20, V 77-101, Fe 4 ppm) over 10.4 g NaNH2 in H (500 psig) was obtained the product contg. 1.6 wt. % S, Ni 17, V 15, and Fe 2 ppm. The S compds. of Na were regenerated by electrolysis to NaNH2 and recycled to the process.

Poly(phosphonic acid amides)

Poly(phosphonic acid amides). Kauth, Hermann; Schmidt, Manfred; Freitag, Dieter; Rudolph, Udo; Kleiner, Frank (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3342637 A1 5 Jun 1985, 18 pp. (German). (Germany). CODEN: GWXXBX. CLASS: ICM: C07F009-44. APPLICATION: DE 83-3342637 25 Nov 1983. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) The polyphosphonamides [-P(O)(R1)N(R2)ZN(R3)-]n (R1 = C1-18 hydrocarbyl; R2, R3 = H, C1-4 alkyl, or together form a heterocyclic ring; Z = hydrocarbylene; n = 3-20), useful as fire retardants for fibers, plastics, and films, are prepd. by melt polymn. of the corresponding diamines with diaryl phosphonates at 50-350°. Thus, stirring MePO(OPh)2 7440, m-C6H4(CH2NH2)2 4080, and NaNH2 [7782-92-5] catalyst 0.3 g at 220° for 2 h, at 220-240°/350-150 mbar with PhOH distn. for 3 h, and at 240°/150-1 mbar for 4 h gave 5700 g polyphosphonamide [97917-30-1] with relative viscosity (m-cresol, 1 g/dL) 1.14, glass temp. 78°, and no.-av. mol. wt. 1500.