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公开(公告)号：DE3513744A1
公开(公告)日：1986-10-23
申请号：DE3513744
申请日：1985-04-17
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER DIPL ING , HAAS HANS DIPL CHEM DR , DAHMEN THEO , ERPENBACH MARKUS
Abstract: Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 320 g/l are made. To this end, an aqueous alkali metal orthophosphate solution and an aqueous solution of an inflating agent are simultaneously forced under a pressure of 6-40 bars into a fluidization zone; the two solutions are fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the two solutions and the fluidized solutions are sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.
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公开(公告)号：DE2860894D1
公开(公告)日：1981-11-05
申请号：DE2860894
申请日：1978-07-03
Applicant: HOECHST AG
Inventor： HARTLAPP GERHARD DR , KOWALSKI WERNER , QUECK ROBERT , DAHMEN THEO
Abstract: Hexagonal phosphorus pentoxide is made in an apparatus comprising a combustion chamber (1) which has a plurality of cooling pipes (10) disposed at its inside wall and is connected through a gas cooler (3) to a condensation chamber (4), the gas cooler (3) comprising a system of cooling pipes (5) which terminate, similarly to an open immersion tube, above the bottom portion of the condensation chamber (4), whose walls are provided with a cooling device (6).
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公开(公告)号：DE3682931D1
公开(公告)日：1992-01-30
申请号：DE3682931
申请日：1986-03-27
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER , HAAS HANS DR , DAHMEN THEO , ERPENBACH MARKUS
Abstract: Alkali polyphosphates (I) with hollow spherical granule structure and a bulk density of less than 320 g/l (pref. 200-300 g/l) are new. (I) are prepd. by spraying aq. alkali orthophosphate solns. (II) under a pressure of 6-40 bar through a flame zone in a spray tower. (II) is sprayed in conjunction with an aq. soln. (III) of a blowing agent by forcing a permanent gas (IV) in finely divided form into a vortex zone filled with these soln. and connected with the nozzles, this gas being under a higher pressure than (II) and (III). The blowing agent is alkali carbonate and/or bicarbonate and (IV) is compressed air, CO2 or N2. The (IV) pressure is at least 20% higher, than the pressure on (II) and the amt. of (IV) used is 1.5-40, pref. 2-6 Ncu.m/cu.m (II).
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公开(公告)号：DE3670825D1
公开(公告)日：1990-06-07
申请号：DE3670825
申请日：1986-03-27
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER , HAAS HANS DR , DAHMEN THEO , ERPENBACH MARKUS
Abstract: Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone peoduced inside the spray tower. Apparatus for carrying out the process.
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公开(公告)号：DE3513743A1
公开(公告)日：1986-10-23
申请号：DE3513743
申请日：1985-04-17
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER DIPL ING , HAAS HANS DIPL CHEM DR , DAHMEN THEO , ERPENBACH MARKUS
Abstract: Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone peoduced inside the spray tower. Apparatus for carrying out the process.
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Patent Agency Ranking
公开(公告)号：DK121786D0
公开(公告)日：1986-03-17
申请号：DK121786
申请日：1986-03-17
Applicant: HOECHST AG
Inventor： KLEE HELMUT , HAAS HANS , KOWALSKI WERNER , DAHMEN THEO
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公开(公告)号：CA1282573C
公开(公告)日：1991-04-09
申请号：CA506779
申请日：1986-04-16
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER , HAAS HANS , DAHMEN THEO , ERPENBACH MARKUS
Abstract: 23343-808 SPHEROIDAL ALKALI METAL POLYPHOSPHATES OF LOW APPARENT DENSITY, AND PROCESS AND APPARATUS FOR MAKING THEM Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.
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公开(公告)号：CA1270620A
公开(公告)日：1990-06-26
申请号：CA506780
申请日：1986-04-16
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER , HAAS HANS , DAHMEN THEO , ERPENBACH MARKUS
Abstract: SPHEROIDAL ALKALI METAL POLYPHOSPHATES OF LOW APPARENT DENSITY, AND PROCESS AND APPARATUS FOR MAKING THEM Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 320 g/l are made. To this end, an aqueous alkali metal orthophosphate solution and an aqueous solution of an inflating agent are simultaneously forced under a pressure of 6 - 40 bars into a fluidization zone; the two solutions are fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the two solutions and the fluidized solutions are sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.
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公开(公告)号：DE3614041A1
公开(公告)日：1987-11-05
申请号：DE3614041
申请日：1986-04-25
Applicant: HOECHST AG
Inventor： KOWALSKI WERNER DIPL ING , DAHMEN THEO , HAAS HANS DIPL CHEM DR , SCHIMMEL GUENTHER DIPL CHEM DR
Abstract: Hexagonal phosphorus pentoxide of diminished reactivity is made by burning liquid yellow phosphorus with a mixture of dry air and pure oxygen inside a combustion zone with the resulting formation of a gas stream containing phosphorus pentoxide; next, the gas stream coming from the combustion zone is passed initially through an intermediary zone indirectly cooled by means of fluidized matter and then through a condensing zone fitted with an immersion tube indirectly cooled by means of fluidized matter; the gas stream is passed through the immersion tube at a mean temperature of 450 DEG to 600 DEG C. and allowed to remain in the immersion tube over a period of 2 to 5 seconds.
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公开(公告)号：DE3509661A1
公开(公告)日：1986-09-25
申请号：DE3509661
申请日：1985-03-18
Applicant: HOECHST AG
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