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    LINEAR, SUBSTANTIALLY WATER-INSOLUBLE AMMONIUM POLYPHOSPHATES AND PROCESS FOR MAKING THEM
    1.
    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%.

    4.
    发明专利
    未知

    公开(公告)号：MX144528A

    公开(公告)日：1981-10-23

    申请号：MX16798777

    申请日：1977-02-09

    Applicant: HOECHST AG

    Inventor： SCHRODTER KLAUS ,  SCHEIBITS WOLFGANG ,  EHLERS KLAUS PETER

    IPC: B01D11/04 ,  C01B25/22 ,  C01B25/234 ,  C01B25/46

    Abstract: For extracting phosphates with alcohol in the presence of water and a strong mineral acid, with the resultant formation of an alcoholic phosphoric acid solution and an aqueous salt phase, a plurality of mixing settlors are arranged one upon another, so that the bottom outlet for the aqueous salt phase of each mixing settlor serves as the feeder for the next mixing settlor below and the outlet for the alcoholic solution of each settlor is connected with the feed pipe for this solution of the next mixing settlor above. Each mixing settlor is subdivided by means of two partitions into a mixing chamber A, a separating chamber B and a settling chamber C. The said two partitions do not extend to the bottom of the mixing settlor and are arranged so that the three chambers A, B and C communicate with one another.

    5.
    发明专利
    未知

    公开(公告)号：MX151894A

    公开(公告)日：1985-05-02

    申请号：MX18303080

    申请日：1980-07-03

    Applicant: HOECHST AG

    Inventor： GRADD REINHARD ,  SCHRODTER KLAUS ,  EHLERS KLAUS PETER

    IPC: B01D11/04 ,  C01B25/46 ,  C22B3/02 ,  C22B3/26

    Abstract: The present invention relates to a mixer/settler-type apparatus for continuous liquid-liquid extraction. The apparatus is comprised of a separating vessel with an inclined bottom portion and an agitator-provided mixing vessel. The mixing vessel is tightly mounted to the inclined bottom portion of the separating vessel, the latter being formed with an upper outlet and a lower outlet and having a level indicator LI for determining phase boundary surface area installed therein. The lower outlet is passed through the separating vessel near its lowermost level and the upper outlet is passed therethrough near its upper end. The level indicator LI is connected to a regulator giving adjustment instructions to a structural element permitting the phase boundary surface area to be established in the separating vessel, distinctly above the upper end of the mixing vessel.

    PROCESS AND APPARATUS FOR RECOVERING ALCOHOLIC PHOSPHORIC ACID SOLUTIONS FROM ACID PHOSPHATES
    8.
    发明专利
    PROCESS AND APPARATUS FOR RECOVERING ALCOHOLIC PHOSPHORIC ACID SOLUTIONS FROM ACID PHOSPHATES 未知

    公开(公告)号：CA1086474A

    公开(公告)日：1980-09-30

    申请号：CA271123

    申请日：1977-02-04

    Applicant: HOECHST AG

    Inventor： SCHRODTER KLAUS ,  SCHEIBITZ WOLFGANG ,  EHLERS KLAUS-PETER

    IPC: B01D11/04 ,  C01B25/22 ,  C01B25/234 ,  C01B25/46 ,  C01B25/18 ,  B01J1/00

    Abstract: Alcoholic phosphoric acid solutions are produced from acid phosphates or phosphate mixtures in the presence of water and a strong mineral acid by extraction with water. To this end, an aqueous phosphate solution or suspension is contacted countercurrently and thereby mixed with a mixture of at least one alcohol having from 3 to 8 carbon atoms and a strong mineral acid,the alcohol or alcohol mixture and the phosphate solution or suspension being used in a ratio by volume of 2 : 1 to 20 : 1, and the mineral acid being used in the quantity just necessary to transform the phosphates approximately quantitatively to phosphoric acid. The alcohol or alcohol mixture, mineral acid and phosphate solution or suspension contain the quantity of water necessary to ensure the formation of a mixture consisting of an alcoholic phase and a separate flowable salt phase, which is separated from the alcoholic phase.

    10.
    发明专利
    未知

    公开(公告)号：MX152984A

    公开(公告)日：1986-07-14

    申请号：MX18303880

    申请日：1980-07-03

    Applicant: HOECHST AG

    Inventor： GRADL REINHARD ,  SCHRODTER KLAUS ,  EHLERS KLAUS-PETER ,  SCHEIBITZ WOLFGANG

    IPC: C01B25/234 ,  C01B25/46

    Abstract: The invention relates to the decontamination of wet-processed phosphoric acid with the use of organic solvents in a plurality of extraction zones, of which each is comprised of a mixing zone and a separating zone, the solvent being immiscible or partially miscible with water. Resulting organic phase and the aqueous phase are contacted countercurrently with respect to one another, the organic solvent phase being dispersed in the aqueous phase. To this end, the invention provides for the aqueous phase to be admitted to the mixing zone at the onset of the extraction, and for organic phase and aqueous phase to be continuously admitted in a volume ratio of at least 2.5:1 to the respective extracting zones in an overall quantity sufficient to provide, in the mixing zones of the extraction zones, a volume ratio of organic phase to aqueous phase of at most 1:1, which is maintained therein.

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