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    • 5. 发明专利
    • DE2120126B2
    • 1980-09-18
    • DE2120126
    • 1971-04-24
    • EXXON RESEARCH AND ENGINEERING CO., LINDEN, N.J. (V.ST.A.)
    • GUERRE, ROBERT P., DOVERRULAND, ROSS R., HOPATCONG
    • F23C7/00F23D11/36
    • 1341253 Vortex burners ESSO RESEARCH & ENG CO 19 April 1971 [6 July 1970] 26452/71 Heading F4T A vortex-type burner for the combustion of oil or gas fuel from a gun 37 with air from an inlet and plenum chamber in the burner casing 12 comprises a swirl chamber in a casing 22 for receiving a predetermined fraction of the air inlet flow and setting up a vortex with the injected fuel, and annular refractory tiles 42 and 45 shaped so as to define a uniform annular air gap 39 between them and a second such gap 40 between the tile 45 and a support plate 49, the remainder of the inlet air being directed through these gaps 39 and 40 to shape and contain the flame without the use of a combustion chamber and to aid combustion by creating turbulences to recirculate hot gases to the combustion zone. The inlet air may be preheated or ambient and its speed of flow through gaps 39 and 40 can be changed by adjusting the gap widths by means of bolts, which air flowing in the gaps must comprise at least half of the inlet air. In a modification of this construction the upper surface 51 of tile 45 and the support plate 49 slope inwardly so that gap 40 is inclined to the horizontal. In an alternative embodiment only one air gap is provided which is formed between parallel surfaces of two annular tiles. The burner casing is lined with block insulation and a pilot system may be incorporated. The burner is described as being mounted on a furnace floor 11 or wall.
    • 7. 发明专利
    • DE2066059B1
    • 1980-05-14
    • DE2066059
    • 1970-01-29
    • EXXON RESEARCH AND ENGINEERING CO., LINDEN, N.J. (V.ST.A.)
    • PATTON, TAD L., BAYTOWN, TEX. (V.ST.A.)
    • C08G18/00C08G18/02C08G18/30C08G18/38C08G73/00C08G73/06C07C121/417C07C120/00
    • 1298521 1,3 - Imidazolidine - 1,3 - diyl - ring- containing polymers ESSO RESEARCH & ENG CO 19 Jan 1970 [3 Feb 1969 (2)] 2437/70 Heading C3R A polymer has a structure of alternating organic moieties (R) and 1,3-imidazolidine-1,3- diyl rings predominantly or both rings randomly or alternately distributed. The polymer is soluble in dipolar aprotic solvents. The moieties (R) may be aliphatic, alicyclic, and/or aromatic, or derivatives thereof containing functional groups which do not reach with an isocyanate group; such groups may be, e.g. alkyl, aryl, halogen, sulphoxy, sulphonyl, alkoxy, aryloxy, oxo, ester, alkylthio or nitro; but not carboxylic acid, phenol or amine. Moieties (R) may be all the same, or there may be 2 or more different (R), which may be randomly or alternately distributed. (R) may be one or more of the following, or a divalent group formed therefrom: diphenylmethane; diphenyl ether; tetramethylene, hexamethylene, dodecamethylene, or 2,2,4-trimethylhexamethylene, or dipropylether; m- or p-phenylene, biphenylene, 1,5-naphthalene, isophorone, 1,4-cyclohexane, toluene, durene, 4,41-diphenylmethane, 3,3 1 -dimethyl-4,4 1 -biphenylene, 4,4 1 - diphenyl-isopropylidene, m- or p-xylylene, 4,4 1 - methylenebis - (cyclohexyl), cyclohexylphenyl, or benzyl; diphenyl sulphone, diphenyl ether, dimethoxybiphenylene; tetrafluorophenylene; octafluorobiphenyl. The polymer is made by a reaction, initiated by an added CN- catalyst between: (a) HCN and diisocyanate(s); (b) dicyanoformamide(s) and diisocyanate(s); or (c) by polymerization of cyanofonnamidyl isocyanate(s). The catalyst may be NaCN. The dicyanoformamide(s) for (b), and the cyanoformamidyl isocyanate(s) for (c), may each be prepared by reacting diisocyanate(s) and HCN. The solvent is preferably a dipolar aprotic solvent, e.g. dimethyl formamide, dimethylacetamide, dimethyl sulphoxide, or N-methylpyrrolidone. It must be anhydrous. In all processes, the reaction may be initiated at 0-60‹ C. The temperature may be regulated to 140‹ C. After the polymerization reaction has subsided, a tertiary amine may be added which catalyses the ring-closure of cyanoformylurea groups to imidazolidine ring. Examples are triethylamine, trimethylamine, N- methyl morpholine, N-methyl piperidine, or triethylene triamine; or N,N-dialkylanilines, pyridine, picoline or lutidine. There may be 0À0005-0À05 molar equiv. of amine based on isocyanate groups. The solution temperature is preferably 20-90‹ C. Precipitation of the polymer. Before the polymer is pptd., an active solvent may be added, e.g. alcohol or primary or secondary amine, to eliminate the isocyanate groups, to prevent cross-linking with the heterocyclic imino groups. The polymer is then pptd. by pouring into either a non-reactive solvent, e.g. benzene, toluene or acetone, or into a reactive solvent which reacts with the terminal isocyanate groups, e.g. an alkanol, primary or secondary amine, H 2 O, or NH 4 OH. Use.-Films, fibres, foams, moulded objects, laminates or electrical insulators. Films may be made by forming under heat and pressure, or by casting from solution, e.g. in dimethyl formamide.