CAS: 12018-01-8; Chromium Dioxide

上下游产品

(0) hexacarbonylchromium(0) hexacarbonyl1-(Phenylmethyl)-3-pyrrolidinemethanol

Chromium;Hexaperoxide 反应生成二氧化铬
参考文献:Meyer,Bernd;Steck,Werner;Boettcher,Bernhard;Jakusch,Helmut;Feser,Rai+
标题:Meyer,Bernd;Steck,Werner;Boettcher,Bernhard;Jakusch,Helmut;Feser,Rai+

专利信息

专利号:US-4084936-A
优先权日:1975-08-16
标 题 :Reducing corrosion in reactors used for the synthesis of chromium dioxide
发明人：OHLINGER MANFRED; WAGNER GERHARD; HONECKER GERHARD; STRITZINGER HEINZ; SPAEHN HEINZ
权利人:BASF AG
摘要:In order to reduce corrosion of the inside walls of a reactor made of iron or an iron alloy and used for the synthesis of chromium dioxide by hydrothermal conversion of chromium(VI) oxide with chromium oxides of lower valency, lead or bismuth is added at those points of the reactor at which an aqueous phase occurs during conversion and which do not contact the chromium oxides to be converted. The lead or bismuth may be used in metallic form or in the form of their oxides, hydroxides or salts.

专利号:US-7838694-B2
优先权日:2004-04-23
标题 :Semi-synthesis and isolation of taxane intermediates from a mixture of taxanes
发明人：NAIDU RAGINA; FOO SAMUEL SIANG KIANG
权利人:CHATHAM BIOTEC LTD
摘要:A process is provided for the semi-synthesis and isolation of taxane intermediates useful in the preparation of paclitaxel and docetaxel, in particular, the semi-synthesis and isolation of 10-deacetylbaccatin III, the semi-synthesis of a mixture of 10-deacetylbaccatin III and baccatin III, and protected derivatives thereof, from a mixture of taxanes.

专利号:US-7276226-B2
优先权日:2002-08-29
标题:Chromium dioxide (CrO2) and composites of chromium dioxide and other oxides of chromium such as CrO2/Cr2O3 and CrO2/Cr2O5) and process for manufacturing the same
发明人：BAJPAI ASHNA; NIGAM ARUN KUMAR
权利人:TATA INST OF FUNDAMENTAL RES
摘要:A novel process for preparing chromium dioxide of substantially high purity as well as composites of CrO 2 /Cr 2 O 3 and CrO 2 /Cr 2 O 5 following a sequence of simple steps. The process does not require pressure as a control parameter during the process of synthesis. No chemical modifier has been used to bring down the working pressure during synthesis. Fairly hard sintered pellets of CrO 2 can be obtained without introducing any detectable impurity phase that usually appears during the process of sintering. Further, CrO 2 /Cr 2 O 3 and CrO 2 /Cr 2 O 5 composites have also been prepared where the fraction of insulating Cr 2 O 3 or Cr 2 O 5 in metallic CrO 2 can be easily controlled. Significant negative magnetoresistance is found in pure CrO 2 (5% MR) as well as CrO 2 /Cr 2 O 3 (33% MR) composites near room temperature. The MR studies on the CrO 2 /Cr 2 O 5 composites have been done and significant negative MR (22%) has been found in CrO 2 /Cr 2 O 5 composites near room temperature.

专利号:US-5143583-A
优先权日:1991-04-02
标 题:Preparation and synthesis of magnetic fibers
发明人：MARCHESSAULT ROBERT H; RIOUX PATRICE; RICARD SERGE
权利人:MARCHESSAULT ROBERT H; RIOUX PATRICE; RICARD SERGE
摘要:Magnetic paper-forming fibers have a particulate magnetic material incorporated within the fibers, as distinct from between the fibers; this can be achieved by loading the lumens of cellulosic fibers with magnetic particles or by generating magnetic particles in situ in a paper-forming fiber which contains ionic groups effective for ion exchange with ferrous ions; the fibers can be employed to produce single layer or multi-layererd magnetic papers for information storage, security paper applications, paper handling, reprographic applications such as magnetographic printing substrate as well as for speciality uses such as electromagnetic shielding, magnetic separation of antibodies based on selective adsorption.

专利号:US-4769165-A
优先权日:1987-01-20
标 题:Process for synthesis of ferromagnetic chromium dioxide
发明人：CHEN HORNG-YIH; CRANDALL TERRY G; BERTONCINO JAMES W
权利人:DU PONT
摘要:Acetic acid is substituted for a portion of the chromic oxide employed in the hydrothermal reaction of chromium trioxide and chromic oxide to form ferromagnetic chromium dioxide.

专利号:US-4741895-A
优先权日:1986-03-25
标 题 :Preparation of chromium(III) oxide
发明人：MUELLER NORBERT; BOETTCHER BERNHARD; OHLINGER MANFRED; REINICKE HELMUT; HONECKER GERHARD
权利人:BASF AG
摘要:A process for the preparation of chromium(III) oxide by decomposing hydrated ammonium dichromate at elevated temperatures, an apparatus for carrying out this process and the use of the chromium(III) oxide thus prepared as a starting material for the synthesis of chromium dioxide.