Benzene from pyrolysis gasoline
    81.
    发明授权
    Benzene from pyrolysis gasoline 失效
    苯酚从热解汽油

    公开(公告)号:US3625879A

    公开(公告)日:1971-12-07

    申请号:US3625879D

    申请日:1970-01-07

    CPC classification number: C10G69/08 C10G59/02

    Abstract: A process for the production and recovery of benzene from pyrolysis naphtha produced by high-temperature cracking of ethane, propane, naphtha or gas oil to produce ethylene. The process comprises the steps of hydrogenating a selected cut of pyrolysis naphtha to saturate olefins, reforming the hydrocarbon product from the hydrogenation step to convert benzene precursors to aromatic compounds and partially crack the nonaromatic hydrocarbons present and thereafter hydrodealkylating the hydrocarbon product from the reforming step to convert the alkyl aromatics to benzene and further crack nonaromatic compounds including those boiling at about the benzene boiling point, so that benzene may then be separated from the hydrodealkylation effluent by conventional distillation.

    Thermal hydrodealkylation process
    84.
    发明授权
    Thermal hydrodealkylation process 失效
    热水解工艺

    公开(公告)号:US3607960A

    公开(公告)日:1971-09-21

    申请号:US3607960D

    申请日:1970-06-18

    CPC classification number: C07C15/04 C07C4/00 C07C4/16 Y02P20/582

    Abstract: In a process for the thermal hydrodealkylation of an alkyl aromatic, such as toluene, to produce benzene, a mixture of diphenyls and high-boiling polymers is separated as bottoms from the effluent of a primary hydrodealkylation zone. This mixture is mixed with recycle hydrogen and flash vaporized, the vapor comprising polyphenyls and hydrogen being passed to an auxiliary reactor wherein the polyphenyls are converted to benzene. The flash vaporization selectively rejects substantially all of the high-boiling polymer compounds which would otherwise tend to form coke in the auxiliary reactor.

    Process for the preparation of alkylated 2,3-dihydrobenzo-furans and alkylated 2,3-dhydro-naphthofurans
    85.
    发明授权
    Process for the preparation of alkylated 2,3-dihydrobenzo-furans and alkylated 2,3-dhydro-naphthofurans 失效
    制备2,3-二氢吲哚酮和烷基2,3-二氢萘酚的方法

    公开(公告)号:US3598842A

    公开(公告)日:1971-08-10

    申请号:US3598842D

    申请日:1969-03-24

    Inventor: MARTINI JOSEPH C

    CPC classification number: C07D307/79 C07D307/92 C07D311/78

    Abstract: A PROCESS IS DEFINED FOR THE PREPARATION OF CYCLIC ETHERS BY THE CONDENSATION OF PHENOLICS, SUCH AS PHENOL, WITH CERTAIN ALDEHYDES CONTAINING TERTIARY CARBON ATOMS, SUCH AS ISOBUTYRALDEHYDE, USING A STRONG ACID CATALYST, SUCH AS H2SO4. THE SINGLE RING PHENOLICS PRODUCE ALKYLATED COUMARAN TYPE CYCLIC ETHERS SUCH AS 2,2-DIMETHYL COUMARAN. THE TWO CONDENSED RING PHENOLICS, SUCH AS BETANAPHTHOL, PRODUCE THE ALKYLATED NAPHTHOFURAN TYPE CYCLIC ETHERS. BETA-NAPHTHOL IS UNIQUE IN ALSO PRODUCING 3,4,5,6DINAPHTHO-2-ISOPROPYLPYRAN, A COMPOSITION OF MATTER USEFUL AS AN ULTRAVIOLET LIGHT ABSORBER. THE AQUEOUS HYDROGEN HALIDES ARE UNIQUE IN PROMOTING THE SELECTIVE CONDENSATION OF META-CRESOL WITH ISOBUTYRALDEHYDE FROM ADMIXTURE WITH PARA-CRESOL TO ALLOW FOR THE SEPARATION AND RECOVERY OF SUBSTANTIALLY PURE PARA-CRESOL.

    Telomerization of ethylene
    88.
    发明授权

    公开(公告)号:US3584071A

    公开(公告)日:1971-06-08

    申请号:US3584071D

    申请日:1968-03-01

    CPC classification number: C07F5/064 C07C2/88

    Abstract: IN THE POLYMERIZATION OF ETHYLENE TO ALPHA OLEFINS WITH A CATALYST COMPRISING TRIETHYLALUMINUM AND NICKEL THE PRESENCE OF DIPHENYL ETHER IS KNOWN TO INHIBIT PRODUCTION OF ALPHA OLEFINS OF CHAIN LENGTH REQUIRED FOR SYNTHESIS OF BIODEGRADABLE DETERGENTS. HOWEVER, WHEN ETHYLENE IS TELOMERIZED WITH A CATALYST COMPRISING ALKYL ALUMINUM SESQUICHLORIDE AND TITANIUM TETRACHLORIDE THE PRESENCE OF DIPHENYL ETHER IS SHOWN TO HAVE AN OPPOSITE EFFECT WHEREBY THE PRODUCTION OF ALKYL GROUPS OF CHAIN LENGTH REQUIRED FOR SYNTHESIS OF BIODEGRADABLE DETERGENTS IS INCREASED.

    Flat spray aspirating nozzle
    89.
    发明授权
    Flat spray aspirating nozzle 失效
    平喷喷嘴

    公开(公告)号:US3578249A

    公开(公告)日:1971-05-11

    申请号:US3578249D

    申请日:1969-03-05

    Inventor: DAVIS ORVIS A SR

    CPC classification number: F23D11/10

    Abstract: A flat spray nozzle utilizing two flows, which may be of two different fuels, or of a fuel and air, and one or both of which may be pressurized. The nozzle includes a front end nosepiece which creates a region of low pressure in its exit orifice, and the exit end of the liquid fuel supply is located at that lowpressure region to thereby cause aspiration of the fuel into the gas as it exits from the nozzle in a flat, fan-shaped spray.

    Bis(cyclopentadienyl) compounds of vanadium
    90.
    发明授权
    Bis(cyclopentadienyl) compounds of vanadium 失效
    BIS(CYCLOPENTADIENYL)VANADIUM的化合物

    公开(公告)号:US3577448A

    公开(公告)日:1971-05-04

    申请号:US3577448D

    申请日:1967-12-26

    Inventor: DEFFNER JOHN F

    CPC classification number: C07F17/00 C08F12/04 C08F4/68

    Abstract: B-DIKETONATOBIS(CYCLOPENTADIENYL)VANADIUM NITRATES AND PERCHLORATES AND B-DIKETONATOBIS (C1-C4 ALKYLCYCLOPENTADIENYL)VANADIUM NITRATES AND PERCHLORATES ARE DISCLOSED AS NEW COMPOUNDS USEFUL IN MODIFYING THE POLYMERIZATION OF AN OLEFIN SUCH AS STYRENE. EXAMPLES SHOW THAT POLYMERIZATION OF STYRENE IS ACCELERATED BY ACETYLACETONATOBIS(CYCLOPENTADIENYL)VANADIUM NITRATE; ACETYLACETONATOBIS(METHYLCYCLOPENTADIENYL)VANADIUM PERCHLORATE; 6METHYL-2,4-HEPTANEDIONATOBIS(METHYLCYCLOPENTADIENYL) VANADIUM NITRATE; AND 1,3-DIPHENY1-1,3-PROPANEDIONATOBIS (CYCLOPENTADIENYL)VANADIUM PERCHLORATE. POLYNMERIZATION OF STYRENE IS INHIBITED BY 3,5-HEPTANEDIONATOBIS(CYCLOPENTADIENYL)VANADIUM PERCHLORATE.

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