发明名称 |
PLATINVERBINDUNGEN, SOLE UND DARAUS ERHALTENE FEINVERTEILTE PLATINNIEDERSCHLAEGE SOWIE VERFAHREN ZU IHRER HERSTELLUNG |
摘要 |
1357494 Dihydroxy platinum sulphurous acid; platinum sols PROTOTECH CO 17 May 1972 [16 June 1971] 23113/72 Heading C1A [Also in Divisions B1 and H1] The invention comprises an acid of the formula H 3 Pt(SO 3 ) 2 (OH) 2 . The said acid may be prepared by adding NaHSO 3 to an aq. soln. of Na 2 PtCl 6 until the pH is 4, and then adding Na 2 CO 3 to the soln. until the pH is 7 thereby forming a ppt. of Na 6 Pt(SO 3 ) 4 OH, slurrying the ppt. in water, adding ¢ mole of an acid resin, e.g. sulphonated styrene divinyl benzene in H form, per mole of Na 2 PtCl 6 , filtering the mixture and then passing the filtrate through an ion exchange column of the resin. Alternatively the said acid may be prepared by dissolving cold H 2 Pt(OH) 6 in aq. H 2 SO 3 of conc. 6% (w./v.) at a pH<7 and then boiling soln. to remove SO 2 . A colloidal sol. containing Pt having an average particle size in the range 15-25 Š may be prepared from the acid by heating the acid at a temp. of 135‹ C. for an hour and then dispersing the product in water. The Pt particles may be impregnated into C or a refractory and used as a catalyst (see Division B1). |
申请公布号 |
DE2229331(A1) |
申请公布日期 |
1973.01.04 |
申请号 |
DE19722229331 |
申请日期 |
1972.06.13 |
申请人 |
PROTOTECH CO., BURLINGTON, MASS. (V.ST.A.) |
发明人 |
PETROW, HENRY G., CAMBRIDGE;ALLEN, ROBERT J., SAUGUS |
分类号 |
F23Q11/00;B01J23/40;B01J23/42;C01G55/00;H01M4/86;H01M4/90;H01M4/92 |
主分类号 |
F23Q11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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