中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

73 records (took 0.022 seconds)

    METHOD OF PHOSPHOROUS PENTA-OXIDE PRODUCTION BY MEANS OF AIR COMBUSTION OF ELEMENTARY PHOSPHORUS
    1.
    发明专利
    METHOD OF PHOSPHOROUS PENTA-OXIDE PRODUCTION BY MEANS OF AIR COMBUSTION OF ELEMENTARY PHOSPHORUS 未知

    公开(公告)号：CS257754B2

    公开(公告)日：1988-06-15

    申请号：CS650381

    申请日：1981-09-03

    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.

    PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT
    2.
    发明专利
    PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT 未知

    公开(公告)号：CA1210563A

    公开(公告)日：1986-09-02

    申请号：CA450208

    申请日：1984-03-22

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  LUHR PETER ,  WERNER HUGO ,  THUMMLER URSUS ,  DORN FRIEDRICH-WILHELM

    IPC: B01J19/00 ,  C01B25/12 ,  C01B25/20

    Abstract: PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT The disclosure relates to a process for making phosphorus pentoxide by subjecting elemental yellow phosphorus to combustion with dried air inside a steel-made combustion chamber with utilization of the reaction heat for the production of energy. To this end, the disclosure provides for the combustion to be effected inside a combustion chamber of which the walls are arranged so as to form a cooling system with cavities therein; for a liquid or liquid/steam-mixture as a heat carrier abstracting the reaction heat to be circulated through the cooling system, the liquid or liquid/steam-mixture assuming an increased temperature being preferably so circulated under increased pressure; for steam formed in the cooling system to be continuously taken therefrom; for an equivalent proportion of fresh liquid to be introduced into the cooling system; for hot P2O5 issuing in vapor form from the combustion chamber to be condensed or worked up into desirable final product, the combustion chamber being a cylindrical vessel with a height/diameter-ratio of 2.5 : 1 to 5 : 1 and having 1 to 10 burners disposed axisymmetrically in its circular base plate. The disclosure also relates to an apparatus for carrying out the process (Figure 1).

    PROCESS FOR MAKING 1,2-DICHLOROETHANE
    3.
    发明专利
    PROCESS FOR MAKING 1,2-DICHLOROETHANE 未知

    公开(公告)号：CA1204787A

    公开(公告)日：1986-05-20

    申请号：CA411777

    申请日：1982-09-20

    Applicant: HOECHST AG

    Inventor： HUNDECK JOACHIM ,  SCHOLZ HARALD ,  HENNEN HANS ,  KUXDORF BERNHARD ,  PUSCHE HERBERT ,  VOMBERG HEINZ ,  LINK GERHARD

    IPC: C07C19/045 ,  C07C17/02 ,  C07C17/38 ,  C07C17/383

    Abstract: PROCESS FOR MAKING 1,2-DICHLOROETHANE The disclosure relates to a process for making and decontaminating 1,2-dichloroethane by reacting ethylene and. chlorine in a reaction zone having a liquid medium containing chlorinated C2-hydrocarbons circulated therein. To this end, the disclosure provides: a) for approximately equimolar proportions of ethylene and chlorine to be introduced into the circulated liquid medium; for the whole to be reacted in a reaction zone at a temperature of about 75 up to 200.degree.C under a pressure of about 1 up to 15 bars, the mean sojourn time of the reaction mixture in the mixing zone and reaction zone being equal to about 1 to 15 hours; b) for a portion of liquid reaction mixture to be removed from the reaction zone and subdivided into two streams, for one of these streams to be passed through a heat exchanger for the abstraction of calorific energy and reduction of its initial temperature, and for it to be recycled to the mixing and reaction zone; for the second stream to by introduced into at expansion vessel and for a proportion corresponding to the quantity of reaction product formed in the reaction zone to be evaporated therein; for resulting vaporous matter to be introduced into a fractionating column, unevaporated liquid matter of the second stream being recycled into the liquid medium circulated in the mixing and reaction zone; and c) for 1,2-dichloroethane to be distillatively separa ted from the vaporous matter introduced into the fractionating column with the use of a portion of the heat energy transferred inside the heat exchanger and for the 1,2-dichloroethane to be removed overhead.

    PROCESS FOR MAKING PHOSPHORUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT
    5.
    发明专利
    PROCESS FOR MAKING PHOSPHORUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT 未知

    公开(公告)号：ZA843135B

    公开(公告)日：1984-12-24

    申请号：ZA843135

    申请日：1984-04-27

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  LUHR PETER ,  THUEMMLER URSUS ,  WERNER HUGO ,  KLEMM WALTER

    IPC: C01B25/12 ,  C01B25/20 ,  F22B33/18 ,  F22D1/02 ,  C01B ,  F22B

    Abstract: The disclosure relates to a process for making phosphorus pentoxide by subjecting elemental yellow phosphorus to combustion with dried air inside a steel-made combustion chamber with utilization of the reaction heat for the production of energy. To this end, the disclosure provides for the combustion to be effected inside a combustion chamber of which the walls are arranged so as to form a cooling system with cavities therein; for water or a water/steam-mixture as a heat carrier abstracting the reaction heat to be circulated through the cooling system, the water or water/steam-mixture assuming an increased temperature being circulated, preferably under increased pressure; for steam formed in the cooling system to be continuously taken therefrom; for an equivalent proportion of fresh desalted water to be introduced into the cooling system; for hot gaseous phosphorus pentoxide issuing from the combustion chamber to be condensed or worked up into phosphoric acid; for the steam taken from the cooling system to be passed through a steam delivery pipe disposed in the upper portion of the combustion chamber, or through a delivery conduit for product gas containing phosphorus pentoxide; for the steam to be heated therein to a temperature of 400 DEG to 600 DEG C. under constant pressure, and for the steam so superheated to be used.

    PROCESS FOR MAKING 1,2-DICHLOROETHANE
    6.
    发明专利
    PROCESS FOR MAKING 1,2-DICHLOROETHANE 未知

    公开(公告)号：ZA826877B

    公开(公告)日：1983-08-31

    申请号：ZA826877

    申请日：1982-09-20

    Applicant: HOECHST AG

    Inventor： HUNDECK JOACHIM ,  SCHOLZ HARALD ,  HENNEN HANS ,  KUXDORF BERNHARD ,  PUESCHE HERBERT ,  VOMBERG HEINZ ,  LINK GERHARD

    IPC: B01J27/00 ,  C07B61/00 ,  C07C17/00 ,  C07C17/02 ,  C07C17/383 ,  C07C19/045 ,  C07C67/00 ,  C06C ,  C07C

    Abstract: The disclosure relates to a process for making 1,2-dichloroethane by reacting ethylene and chlorine in a reaction zone having a liquid medium containing chlorinated C2-hydrocarbons circulated therein. To this end, the disclosure provides: (a) for approximately equimolar proportions of ethylene and chlorine to be introduced into the circulated liquid medium; for the whole to be reacted in a reaction zone at a temperature of about 75 DEG up to 200 DEG C. under a pressure of about 1 up to 15 bars, the mean sojourn time of the reaction mixture in the mixing zone and reaction zone being equal to about 1 to 15 hours; (b) for a portion of liquid reaction mixture to be removed from the reaction zone and subdivided into two streams, for one of these streams to be passed through a heat exchanger for the abstraction of calorific energy and reduction of its initial temperature, and for it to be recycled to the mixing and reaction zone; for the second stream to be introduced into an expansion vessel and for proportions corresponding to the quantity of reaction product formed in the reaction zone to be evaporated therein; for resulting vaporous matter to be introduced into a fractionating column, unevaporated liquid matter of the second stream being recycled into the liquid medium circulated in the mixing and reaction zone; and (c) for 1,2-dichloroethane to be distillatively separated from the vaporous matter introduced into the fractionating column with the use of a portion of the heat energy transferred inside the heat exchanger and for the 1,2-dichloroethane to be removed overhead.

    PROCESS FOR THE CONTINUOUS ELIMINATION OF RESIDUAL HYDROCARBONS FROM POLYOLEFINS, AND APPARATUS FOR CARRYING OUT THE PROCESS
    7.
    发明专利
    PROCESS FOR THE CONTINUOUS ELIMINATION OF RESIDUAL HYDROCARBONS FROM POLYOLEFINS, AND APPARATUS FOR CARRYING OUT THE PROCESS 未知

    公开(公告)号：DE3061698D1

    公开(公告)日：1983-03-03

    申请号：DE3061698

    申请日：1980-01-07

    Applicant: HOECHST AG

    Inventor： KAISER KARL DR ,  WILLMS ROBERT ,  KUXDORF BERNHARD

    IPC: C08F6/00 ,  C08F6/06 ,  C08F6/10 ,  C08F10/00

    Abstract: The invention relates to an improved process, wherein polyolefins are freed from saturated liquid residual hydrocarbons with the aid of water and steam. The improvement comprises A. introducing the hydrocarbon-containing polyolefin into an aqueous emulsifier-containing solution having a surface tension at 20 DEG C. of about 50 to 60 dynes/cm with respect to air; stirring the resulting mixture and converting it to a homogeneous dispersion, the aqueous dispersion containing about 10 to 40 weight % of the polyolefin; B. introducing the dispersion into the upper portion of a column provided with 5 to 30 sieve plates and overflow weirs and contacting the dispersion in countercurrent fashion with steam of about 100 DEG to 120 DEG C.

Patent Agency Ranking