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1.发明授权
公开(公告)号：US3841907A
公开(公告)日：1974-10-15
申请号：US24527172
申请日：1972-04-18
Applicant: BASF AG
Inventor： OHLINGER M , LEUTNER B , SCHWARZMANN M
CPC classification number: G11B5/70636 , C01G37/02
Abstract: The invention relates to ferromagnetic chromium dioxide crystals which are particularly suitable as magnetic pigments for magnetic recording media and which are stabilized by sparingly watersoluble metal compounds whose cations form sparingly watersoluble metal chromates (such as lead hydroxide, barium phosphate, lead silicate and calcium sulfate) applied to, and particularly precipitated onto, the surface thereof, and to a process for their production.
Abstract translation: 本发明涉及铁磁性二氧化铬晶体，其特别适用于磁记录介质的磁性颜料，并且其由阳离子形成微水溶性金属铬酸盐（例如氢氧化铅，磷酸钡，硅酸铅）的微溶于水的金属化合物稳定化 和硫酸钙），并且特别沉淀在其表面上，以及其制备方法。
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公开(公告)号：US3769087A
公开(公告)日：1973-10-30
申请号：US3769087D
申请日：1972-04-18
Applicant: BASF AG
Inventor： LEUTNER B , SCHWARZMANN M , OHLINGER M
CPC classification number: G11B5/70636 , C01G37/02 , C01P2004/84 , Y10S428/90 , Y10T428/31786
Abstract: The invention relates to ferromagnetic chromium dioxide crystals which are particularly suitable as magnetic pigments for magnetic recording media and whose surface, for the purpose of stabilization, is protected with antimony or arsenic compounds which are sparingly soluble in water, and to a process for the production of chromium dioxide crystals thus stabilized by the precipitation of antimony or arsenic compounds which are sparingly soluble in water.
Abstract translation: 本发明涉及铁磁二氧化铬晶体，其特别适用于磁记录介质的磁性颜料，其表面为稳定目的而用微溶于水的锑或砷化合物进行保护，以及生产方法 的二氧化铬晶体，通过沉淀出微溶于水的锑或砷化合物稳定。
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Patent Agency Ranking
公开(公告)号：SE412406B
公开(公告)日：1980-03-03
申请号：SE7602258
申请日：1976-02-24
Applicant: BASF AG
Inventor： HORN P , WURMB R , LEUTNER B , SEYDL W , THEYSOHN R , SCHLIMPER H-U
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公开(公告)号：DK526181A
公开(公告)日：1982-05-29
申请号：DK526181
申请日：1981-11-27
Applicant: BASF AG
Inventor： LEUTNER B , PURUCKER B , ROTHER E , JUERGENS G F , WAGNER D
Abstract: A multi-trace element fertilizer which contains magnesium as a further nutrient and in which the complex-forming trace elements are present in the form of anionic chelates with one or more N-carboxyalkylaminoacids is prepared by a process wherein the N-carboxyalkylaminoacids are reacted, in the presence of water, with the trace elements or trace element compounds in a molar ratio of N-carboxyalkylaminoacids to trace elements or trace element compounds of not less than 0.8:1, at least 20% by weight of the trace element compounds being oxides, hydroxides and/or carbonates. At the same time, or subsequently, the pH of the solution is brought to 3.5-6 by adding a member selected from the group consisting of magnesium oxide, hydroxide and carbonate. A maximum of 50 equivalent percent of the magnesium compound may however be replaced by a member selected from the group consisting of alkali metal oxides, hydroxides and carbonates and ammonia.
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公开(公告)号：SE7602258L
公开(公告)日：1976-09-22
申请号：SE7602258
申请日：1976-02-24
Applicant: BASF AG
Inventor： HORN P , WURMB P , LEUTNER B , SEYDL W , THEYSOHN R , SCHLIMPER H-U
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公开(公告)号：SE7602258A
公开(公告)日：1976-09-22
申请号：SE7602258
申请日：1976-02-24
Applicant: BASF AG
Inventor： HORN P , WURMB P , LEUTNER B , SEYDL W , THEYSOHN R , SCHLIMPER H-U
CPC classification number: C08K9/12 , C08K3/22 , C08K5/0066 , C08L77/00
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