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    1.
    发明专利
    未知

    公开(公告)号：DK155588B

    公开(公告)日：1989-04-24

    申请号：DK456581

    申请日：1981-10-14

    Applicant: HOECHST AG

    Inventor： MAURER ALEXANDER ,  HEYMER GERO ,  STENZEL JUERGEN

    IPC: C09K21/02 ,  C01B25/40 ,  C09K21/12

    Abstract: The invention relates to a process for making long chain ammonium polyphosphate consisting essentially of crystalline modification II. To this end, a mixture of phosphorus pentoxide and ammonium orthophosphate in a molar ratio of 1:0.9 to 1:1.1 is reacted with 0.1 to 15 mol % of melamine or its condensation products selected from melam, melem or mellon, calculated as melamine, at a temperature within the range 50 DEG to 150 DEG C. in the presence of an excess of ammonia and the reaction product is heat-treated at temperatures within the range 200 DEG to 400 DEG C.

    2.
    发明专利
    未知

    公开(公告)号：DK149802B

    公开(公告)日：1986-10-06

    申请号：DK116980

    申请日：1980-03-18

    Applicant: HOECHST AG

    Inventor： MAURER ALEXANDER ,  SCHROEDTER KLAUS ,  HEYMER GERO

    IPC: C01B25/237 ,  B01J23/00 ,  B01J23/54 ,  C01B25/235 ,  B01J23/38

    Abstract: The invention relates to a process for freeing aqueous phosphoric acid solutions from organic contaminants. To this end, the solutions are admixed and reacted with hydrogen peroxide in the presence of a catalyst consisting of a noble metal or metal oxide being inert with respect to phosphoric acid or of a mixture of said noble metal and metal oxide.

    LINEAR, SUBSTANTIALLY WATER-INSOLUBLE AMMONIUM POLYPHOSPHATES AND PROCESS FOR MAKING THEM
    3.
    发明专利
    LINEAR, SUBSTANTIALLY WATER-INSOLUBLE AMMONIUM POLYPHOSPHATES AND PROCESS FOR MAKING THEM 未知

    公开(公告)号：CA1191329A

    公开(公告)日：1985-08-06

    申请号：CA421023

    申请日：1983-02-07

    Applicant: HOECHST AG

    Inventor： SCHRODTER KLAUS ,  MAURER ALEXANDER

    IPC: C01B25/40 ,  C01B25/28

    Abstract: LINEAR, SUBSTANTIALLY WATER-INSOLUBLE AMMONIUM POLYPHOS PHATES AND PROCESS FOR MAKING THEM The disclosure relates to a process for making linear, substantially water-insoluble ammonium polyphosphates of the general formula (NH4PO3)10-1000 by heating and continuously mixing phosphorus pentoxide and ammonium orthophosphate in the presence of ammonia and tempering the resulting reaction product over a period of several hours at 200 to 400.degree.C in the presence of ammonia. To this end, the phosphorus pentoxide and ammonium orthophosphate are subjected at 50 to 150.degree.C to the following successive operations which provide a) for them to be reacted with ammonia over a period of 5 to 15 minutes under an overpressure of 1 - 2 millibars, b) for them to be mixed under nitrogen for 10 to 60 minutes at atmospheric pressure while arresting the supply of ammonia c) for them to be reacted with ammonia over a period of 1 to 3 hours under a pressure 1 to 5 millibars lower than atmospheric pressure, and the reaction product is tempered, the ammonia being used in an overall stoichiometric excess of at most 20 mol%.

    PROCESS FOR MAKING GRANULATED CONDENSED PHOSPHATES
    4.
    发明专利
    PROCESS FOR MAKING GRANULATED CONDENSED PHOSPHATES 未知

    公开(公告)号：CA1171635A

    公开(公告)日：1984-07-31

    申请号：CA386367

    申请日：1981-09-22

    Applicant: HOECHST AG

    Inventor： WASEL-NIELEN HORST-DIETER ,  MAURER ALEXANDER ,  ADRIAN RENATE

    IPC: C01B25/38 ,  C01B25/39 ,  C11D3/06

    Abstract: The invention relates to a process for converting water-soluble, condensed phosphates of the following general formula (I) (I) in which M stands for sodium, potassium or Ammounium and n stands for a number between 4 and about 100, to granulate, wherein the pulverulent, water-soluble, condensed phosphate is thouroughly agitated and granulated in the presence fo water and of a phosphate salt other than the condensed phosphate. More specifically, the condensed phosphate of general formula (I) or a mixture of the phosphate with an anhydrous or partially hydrated alkali metal phosphate is thoroughly agitated and granulated in the presence of water and an ammonium polyphosphate of the following general formula (II) (II) in which n stands for an integral average value of 3 to 1000, m stands for a whole number of up to ? ? 2, and the m/n-ratio is between about 1.0 and 1.57.

    5.
    发明专利
    未知

    公开(公告)号：DK109583A

    公开(公告)日：1983-09-07

    申请号：DK109583

    申请日：1983-03-04

    Applicant: HOECHST AG

    Inventor： MAURER ALEXANDER ,  WASEL-NIELEN HORST-DIETER ,  ADRIAN RENATE

    IPC: C11D3/06 ,  C11D3/08 ,  C11D

    Abstract: The disclosure relates to an abrasion-resistant storable cogranulate consisting of particles with a size of about 0.2 to 2 mm and having an apparent density of 800 to 1100 g/liter, the cogranulate containing (a) about 14.3 to 79.9 weight % of pentasodium tripolyphosphate (b) about 10.9 to 79.9 weight % of an alkali metal silicate (c) about 0.1 to 7.7 weight % of an ammonium polyphosphate of the followiong general formula (I) H(n-m)+2(NH4)mPnO3m+1 (I) in which n stands for an integral average value of 10 to 1000, m stands for a whole number of at most n+2 and m/n stands for a value of about 1, and (d) about 0 to 99 weight % water bound to components (a) and (b), based on the possible maximum quantity of hydration water of the components (a) and (b).

    PROCESS FOR MAKING MIXED GRANULATES FROM CONDENSED PHOSPHATES AND BUILDER SALTS
    8.
    发明专利
    PROCESS FOR MAKING MIXED GRANULATES FROM CONDENSED PHOSPHATES AND BUILDER SALTS 未知

    公开(公告)号：CA1152844A

    公开(公告)日：1983-08-30

    申请号：CA399296

    申请日：1982-03-24

    Applicant: HOECHST AG

    Inventor： MERKENICH KARL ,  WASEL-NIELEN HORST-DIETER ,  MAURER ALEXANDER ,  ADRIAN RENATE

    IPC: C11D3/06

    Abstract: PROCESS FOR MAKING MIXED GRANULATES FROM CONDENSED PHOSPHATES AND BUILDER SALTS The disclosure provides a process for making mixed granulates from water-soluble condensed phosphates and at least one builder salt by subjecting the components making the granulate to granulation in the presence of of water. To this end, the disclosure provides: a) for water to be sprayed on to a mixture of the condensed phosphate, the builder salt and an ammonium polyphosphate as a binder, and for the mixture to be granulated, or b) for an aqueous solution or suspension of ammonium polyphosphate to be sprayed on to the mixture of condensed phosphate and builder salt, and for the mixture to be granulated.

    PROCESS FOR THE DEARSENIFICATION OF POLYPHOSPHORIC ACID
    9.
    发明专利
    PROCESS FOR THE DEARSENIFICATION OF POLYPHOSPHORIC ACID 未知

    公开(公告)号：ZA825909B

    公开(公告)日：1983-07-27

    申请号：ZA825909

    申请日：1982-08-16

    Applicant: HOECHST AG

    Inventor： MAURER ALEXANDER ,  HEYMER GERO ,  ERPENBACH MARKUS

    IPC: C01B25/24 ,  C01B

    Abstract: The disclosure relates to a process for the continuous dearsenification of polyphosphoric acid with the aid of hydrogen sulfide in a gas admission zone. To this end, the disclosure provides for the acid to be dearsenified in a gas admission zone subdivided so as to comprise at least two separate liquid matter-receiving zones, each zone being separated from the other by means of a separate gas zone; for the liquid in each of the liquid matter-receiving zones to be maintained at a level 0.1 up to 10 cm high, without admission of gas; for hydrogen sulfide which remained unreacted in the individual liquid matter-receiving zones to be collected in the respective gas zone and for it to be finely redispersed in the liquid matter-receiving zone directly upstream of the respective gas zone by allowing the hydrogen sulfide to flow through a plurality of openings into the acid, the latter being delivered from the respective liquid-matter-receiving zone into the next downstream liquid-matter-receiving zone, and introduced thereinto directly below the liquid matter level therein; for precipitated arsenic sulfide to be separated from the acid coming from the lower end of the gas admission zone, and for the filtrate obtained to be freed from gaseous hydrogen sulfide in excess.

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