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    35.
    发明专利
    未知

    公开(公告)号：DD201580A5

    公开(公告)日：1983-07-27

    申请号：DD23294181

    申请日：1981-09-01

    Applicant: HOECHST AG

    Inventor： DANIEL HELLMUTH ,  QUECK ROBERT ,  KUXDORF BERNHARD ,  PUESCHE HERBERT

    IPC: C01B25/12 ,  C01B25/20

    Abstract: The invention relates to process for making phosphorus pentoxide by subjecting elementary phosphorus to a combustion reaction with the aid of air, the reaction heat being utilized for the production of energy. To this end, the invention provides for the phosphorus to be subjected to combustion with dry air containing, per m3, 5 g down to 0.01 g of water, inside a combustion chamber of which the metallic walls are arranged so as to form a cooling system with cavities therein and for a liquid and liquid/steam-mixture, respectively, to be circulated through the cooling system under pressure within the range 1 to 150 bars, the liquid or mixture assuming a temperature of more than 150 DEG C. up to 500 DEG C. Steam which is formed in the cooling system is continuously taken therefrom and replaced by an equivalent proportion of fresh liquid.

    RECOVERY OF PYROLYTIC ENERGY IN THE PRODUCTION OF VINYL CHLORIDE BY SUBJECTING 1,2-DICHLOROETHANE TO AN INCOMPLETE THERMAL CRACKING REACTION
    36.
    发明专利
    RECOVERY OF PYROLYTIC ENERGY IN THE PRODUCTION OF VINYL CHLORIDE BY SUBJECTING 1,2-DICHLOROETHANE TO AN INCOMPLETE THERMAL CRACKING REACTION 未知

    公开(公告)号：CA1127669A

    公开(公告)日：1982-07-13

    申请号：CA345740

    申请日：1980-02-15

    Applicant: HOECHST AG

    Inventor： CZEKAY ARNO ,  HOLLER ERNST ,  KUXDORF BERNHARD ,  PUSCHE HERBERT ,  NEUSS HANS-WILHELM ,  SCHOLZ HARALD

    IPC: C07C17/25 ,  C07C21/06

    Abstract: RECOVERY OF PYRCLYTIC ENERGY IN THE PRODUCTION OF VINYL CHLORIDE BY SUBJECTING 1,2-DICHLOROETHANE TO AN INCOMPLETE THERMAL CRACKING REACTION Pyrolytic energy is recovered in the production of vinyl chloride, wherein liquid 1,2-dichloroethane is preheated under pressure, evaporated and introduced in gaseous form into a craking zone, subjected to an incomplete thermal cracking reaction therein, the resulting hot cracked gases maintained under pressure are cooled and succesively separated into their constituents in a plurality of distilling zones for removal of hydrogen chloride, vinyl chloride, and high boilers therefrom, and for recovery of unreacted 1,2dichloroethane. To this end, the hot cracked gases are cooled in at least one heat exchanger of which the jacket side has a heat transfer agent or coolant passed through it, the heat transfer agent or coolant with the heat absorbed therein being removed for use elsewhere in the process.

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