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公开(公告)号：DE3145712A1
公开(公告)日：1983-05-26
申请号：DE3145712
申请日：1981-11-19
Applicant: BASF AG
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公开(公告)号：DE2516361A1
公开(公告)日：1976-10-28
申请号：DE2516361
申请日：1975-04-15
Applicant: BASF AG
IPC: C07F9/50
Abstract: PPh3 prepn. by reacting PH3PCl2 with white P and recovering reaction products PCl3 and PPH3 from reaction mixt. by distn. takes place by process in which reaction and distn. steps are effected in the presence of granulated coal, pref. coke, esp. having av. particle dia. 1-20 mm. PPh3 is used for ylide-syntheses, e.g. for industrial prepn. of vitamin A. Presence of coal allows conversion of resinous by-products to a form in which they do not impair PPh3 recovery. Process enables PPh3 to be obtd. economically and obviates need for burning Ph3PO. Granulated coal quantity is pref. 0.3-1 kg/kg white P.
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公开(公告)号：DE2312848A1
公开(公告)日：1974-09-26
申请号：DE2312848
申请日：1973-03-15
Applicant: BASF AG
Inventor： STRITZINGER HEINZ DIPL ING , HARTMANN JOB-WERNER DIPL CHEM , BALZ WERNER DIPL CHEM DR , OSTERTAG WERNER DIPL CHEM DR
Abstract: Aluminium or Al alloy discs coated with a magnetic layer contg. 3-9, pref. 4-6 wt.% corundum powder, where pref. 40-60 wt.% of the corundum has a particle size of 110-200% of the thickness of the final ground magnetic layer, the remainder having a size =110% of this thickness. A corundum paste is prepd. by mixing sharp-edged corundum, size 1-10 mu with an epoxy resin having an epoxide equiv. wt. of 1000-2000 made from epichlorohydrin and 2,2-bis(4-hydroxyphenyl)-propane dissolved in toluene and ethylene glycolmonoethylether-monoacetate (I) to form a resin soln. (II). This paste is added to a mixt. of needle-shaped gamma Fe2O3 (average particle length 0.8 mu) with a further amt. of (I) and (II) plus a hardenable melamine-formaldehyde and sprayed on one or both sides of the Al disc (which may first be coated with a laquer) to form a film 3.9-4.4 mu thick. After curing, the surface is ground with rotating discs of porous polyvinyl alcohol sponge using diamond powder (7 mu) and a press. of 0.4 kg/cm2, followed by polishing with felt and diaminod powder (1) mu). The final magnetic layer is 3.8-4.1 mu thick.
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公开(公告)号：DE3003352A1
公开(公告)日：1981-08-06
申请号：DE3003352
申请日：1980-01-31
Applicant: BASF AG
Abstract: To prepare a colored pigment which has a metallic luster and consists of a metallic core whose surface is at least partially covered with an iron oxide, iron pentacarbonyl is oxidized with oxygen in a fluidized bed of the metallic cores at above 100 DEG C. The amount of iron pentacarbonyl vapor introduced into the fluidized bed must not exceed 5% by volume, based on the total gases introduced into the fluidized bed over the same period of time.
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公开(公告)号：DE2829739A1
公开(公告)日：1980-01-24
申请号：DE2829739
申请日：1978-07-06
Applicant: BASF AG
Inventor： OSTERTAG WERNER DIPL CHEM DR , ERTL GERT DIPL CHEM DR , BITTLER KNUT DIPL CHEM DR , HETZEL ECKHARD DIPL ING , SALADIN GUENTER DIPL ING , APPL MAX DIPL CHEM DR , VOELKL ERFRIED DIPL CHEM DR , PFORR GERHARD DIPL PHYS DR , WUNSCH GERD DIPL CHEM DR
IPC: C01F7/60
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Patent Agency Ranking
公开(公告)号：DE3135281A1
公开(公告)日：1983-03-24
申请号：DE3135281
申请日：1981-09-05
Applicant: BASF AG
Abstract: Yellow pigments containing bismuth vanadate and having the composition BiVO4.xBi2MoO6.yBi2WO6 where x is from 0.6 to 2.25 and y is from 0 to 0.1, are prepared by a process in which a solution containing a bismuth(III) salt, a vanadate and a molybdate is acidified until the pH is
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8.发明专利
公开(公告)号：DE2748781A1
公开(公告)日：1979-05-03
申请号：DE2748781
申请日：1977-10-31
Applicant: BASF AG
Inventor： ERTL GERT DIPL CHEM DR , AUTZEN HORST DIPL CHEM DR , KIENER VOLKER DIPL CHEM DR , OSTERTAG WERNER DIPL CHEM DR , WUNSCH GERD DIPL CHEM DR
Abstract: The cpd. of formula Na2S2O5.HCOONa (I) is new. It is made by concn. of an aq. soln. contg. Na pyrosulphate and Na formate (mole ratio 1:1-1:4) at 60-110 degrees C, then cooling to 10-30 degrees C and sepg. crystals formed. Treatment of an aq. slurry of (I) with acid gives Na dithionite in high yields. Compared with the formate method for dithionite prodn. this method does not require pure SO2 and (I) is relatively stable (to moisture and air) and not spontaneously flammable.
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公开(公告)号：DE3221338A1
公开(公告)日：1983-12-08
申请号：DE3221338
申请日：1982-06-05
Applicant: BASF AG
Abstract: Pigments of the composition BiVO4xxBi2MoO6xyBi2WO6, in which x and y have values from 0 to 3, are prepared by acidifying a joint solution of a bismuth(III) salt, a vanadate and a molybdate to a pH of less than 0, and increasing the pH of the acidic solution at temperatures of 20 to 95 DEG C to values of 0.1 to 3.5 by means of alkaline solutions which may contain a tungsten(VI) compound dissolved therein. The precipitation product and the reaction solution are allowed to stand at temperatures of 50 to 100 DEG C for 30 to 120 minutes before the precipitation product is separated off from the reaction solution, washed, and, if desired, dried and treated at temperatures of 300 to 800 DEG C.
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