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公开(公告)号：CA1035543A
公开(公告)日：1978-08-01
申请号：CA202384
申请日：1974-06-13
Applicant: HOECHST AG
Inventor： SCHRODTER HERMANN , STEPHAN HANS-WERNER , HEYMER GERO
Abstract: 1446260 Ammonium polyphosphates HOECHST AG 10 April 1974 [14 June 1973] 15885/74 Heading C1A Linear ammonium polyphosphates, where n=10-1000, being water-insoluble or having a controlled water-insolubility, are prepared by reacting equimolecular proportions of ammonium orthophosphate and phosphorus pentoxide with gaseous ammonia at 170-350 C. while continuously and simultaneously mixing, kneading and comminuting the reactants. The water-insolubility of the final product may be predetermined by the use of a certain reaction temperature, the water-insolubility increasing with increased temperature (e.g. watersolubility is 22% at 200 C., 13% at 210 C, 9% at 230 C., 6% at 250 C. and 2-3% at 270 C.). The preparation may be carried out in an apparatus, Fig. 1, in which the solid reactants are delivered from reservoirs 1 and 1 1 , via weighing means 2 and 2 1 , through a conduit 3 to a reactor 4. The latter is a closed trough provided with a heating jacket through which a heating medium is circulated through an inlet 6 and outlet 6 1 . Ammonia is introduced at 4 by a supply tube 7 and distributed across the surface of the reaction mass, preferably by means of a tube provided with a plurality of small perforations. Excess ammonia escapes via 9. Implements 10 (normally two double Z-shaped blades) mix, knead and comminute the reaction material. The reaction product is delivered via 14 and cooling means 11 to a sieving or screening mechanism 12. Oversize material may be returned to the reactor.
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公开(公告)号：PT93412A
公开(公告)日：1990-11-07
申请号：PT9341290
申请日：1990-03-12
Applicant: HOECHST AG
Inventor： SCHRODTER HERMANN , BRAUN ALBERT , SCHOLZ HARALD
Abstract: An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gas-evolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.
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公开(公告)号：CA2011380A1
公开(公告)日：1990-09-13
申请号：CA2011380
申请日：1990-03-02
Applicant: HOECHST AG
Inventor： SCHRODTER HERMANN , BRAUN ALBERT , SCHOLZ HARALD
Abstract: HOE 89/H 010 Agent and process for desulfurizing molten metals An agent for desulfurizing molten metals, in particular molten iron, comprises a CaC2/CaO crystal blend with a maximum of 62% by weight of CaC2, gas-evolving substances and 0 to 44% by weight of metallic magnesium as the components. For desulfurizing molten metals, in particular molten iron, using this agent, either the mixture comprising both the CaC2/CaO crystal blend and gas-evolving substances, and the magnesium, are fluidized separately and the two fluidized products are combined immediately before they enter the melt, or the CaC2/CaO crystal blend, gasevolving substances and magnesium components are fluidized together and the fluidized product is introduced into the melt.
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4.发明专利
公开(公告)号：ES2012038B3
公开(公告)日：1990-03-01
申请号：ES86113501
申请日：1986-10-01
Applicant: HOECHST AG
Inventor： SCHRODTER HERMANN , BRAUN ALBERT , KAMPMANN FRIEDRICH-WILHELM
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