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1. 发明专利

JPH03285029A METHOD FOR RECOVERING AND REFINING RHODIUM 失效
公开(公告)号：JPH03285029A
公开(公告)日：1991-12-16
申请号：JP8357090
申请日：1990-03-30
申请人： TANAKA PRECIOUS METAL IND
发明人： ICHIISHI TOMOSHI , SHIBAZAKI TAKUO
IPC分类号： C22B11/00
摘要： PURPOSE:To simply recover low concn. Rh at a high recovering rate and high purity by adding SnCl2 to a rhodium-hydrochloric acid soln. having specified hydrochloric acid concn. and adsorbing Rh by a dialkyl sulfide-impregnated porous resin. CONSTITUTION:Hydrochloric acid is added to a rhodium-hydrochloric acid soln. including large amounts of base metals and having low Rh concn. to regulate the hydrochloric acid concn. to 1 to 6N. Next, SnCl2 is added to this soln. The amt. of the SnCl2 to be added is preferably regulated to 10 to 50 times, by molar ratio, to Rh. After that, this soln. is brought into contact with a porous resin impregnated with preferably >=50wt.% dialkyl sulfide to absorb Rh. Then, the porous resin adsorbed with Rh is washed by dilute hydrochloric acid of 0.5 to 1 stipulation to remove Sn or the like and is thereafter baked at about 800 deg.C. The obtd. partially oxidized metallic Rh is reduced by a hydrogen gas and is perfectly metallized. After that, this Rh is mixed with NaCl, in which a Cl2 gas is blown, and chlorination is executed at 800 to 950 deg.C for >= one hr. In this way, Rh hardly including base metals can be recovered at approximately 100% recovering rate in the shape of soluble sodium salt of chlorhodic acid.

2. 发明专利

JPH0733444A HIGH PURITY HEXAHYDROXOPLATINIC (IV) ACID AND METHOD FOR EVALUATING THE SAME 失效
公开(公告)号：JPH0733444A
公开(公告)日：1995-02-03
申请号：JP19888293
申请日：1993-07-16
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00
摘要： PURPOSE:To provide high purity hexahydroxoplatinic (IV) acid not contg. traces of Cl and other impurities and to provide a method for evaluating the acid. CONSTITUTION:When this high purity hexahydroxoplatinic (IV) acid, sodium hydroxide and sodium chloride are dissolved in water in 1:6:6 molar ratio so as to regulate the concn. of platinum to 1.5g/l, the resulting aq. soln. has 1.2-1.9 absorbance at 300nm wavelength and 2.3-3.5 absorbance at 250nm wavelength. This high purity hexahydroxoplatinic (IV) acid is evaluated as a good product in the case of 1.2-1.9 absorbance at 300nm and 2.3-3.5 absorbance at 250nm.

3. 发明专利

JPH0725621A PRODUCTION OF HEXAHYDROXOPLATINIC (IV) ACID 失效
公开(公告)号：JPH0725621A
公开(公告)日：1995-01-27
申请号：JP19428293
申请日：1993-07-09
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00
摘要： PURPOSE:To provide a process capable of stably producing hexahydroxoplatinic (IV) acid having a low impurity content in a high yield. CONSTITUTION:Hexahydroxoplatinic (IV) acid is produced by adding an aqueous solution of sodium hydroxide to an aqueous solution of hexachloroplatinic (IV) acid, boiling the mixture and neutralizing with acetic acid. In the above process, the mixing molar ratio of platinum to sodium hydroxide is adjusted to 1:(8-16), the platinum concentration in the total reaction liquid at the start of the reaction is 5-20g/L, the boiling time is >=6hr and the pH of the mixture at the neutralization with acetic acid is 4-7.

4. 发明专利

JPH1192150A PREPARATION OF PLATINUM NITRATE SOLUTION 失效
公开(公告)号：JPH1192150A
公开(公告)日：1999-04-06
申请号：JP25475497
申请日：1997-09-19
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , B01J23/42
摘要： PROBLEM TO BE SOLVED: To easily prepare a platinum nitrate soln. having stability over a long period of time by adding nitric acid having a specified concn. to hydroxyplatinic acid by the sum of the amt. required to dissolve the hydroxyplatinic acid and the amt. required to stabilize the resultant platinum nitrate and dissolving the hydroxyplatinic acid. SOLUTION: Acetic acid is added to a hexahydroxopotassium platinum soln. and a formed precipitate is separated by filtration and washed to prepare hydroxyplatinic acid. Nitric acid having ∞300 g/L concn. is added to the hydroxyplatinic acid by about 8 times (mol) the amt. of platinum as the sum of about 6 times (mol) the amt. of platinum as the amt. required to dissolve the hydroxyplatinic acid and about 2 times (mol) the amt. of platinum as the amt. required to stabilize the resultant platinum nitrate soln. They are heated to about 50-100 deg.C under atmospheric pressure and the hydroxyplatinic acid is perfectly dissolved by stirring. After cooling, nitric acid is properly added to attain a prescribed concn. and the objective platinum nitrate soln. causing no change in the state even after storage for >=1 month is obtd.

5. 发明专利

JPH10218624A PRODUCTION OF TETRAAMMINE PLATINUM (II) DICHLORIDE CRYSTAL 失效
公开(公告)号：JPH10218624A
公开(公告)日：1998-08-18
申请号：JP2259097
申请日：1997-02-05
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , B01J23/42
摘要： PROBLEM TO BE SOLVED: To obtain an impurity-free tetraammine platinum (II) dichloride crystal by adding aqueous ammonia to an aqueous solution of tetraammine platinum (II) dichloride, concentrating the solution, as its ammonia alkalinity is maintained, filtering and drying the precipitate. SOLUTION: In an autoclave, chloroplatinic acid or its salt is allowed to react with aqueous ammonia at 110-130 deg.C for 16-18 hours. Hydrochloric acid is added to the resultant tetraammine Pt(II) dichloride and they are heated under reflux for 17-19 hours to precipitate trans-dichlorodiammine Pt(II). This precipitate is filtered, washed, combined with aqueous ammonia to effect the reaction at 75-85 deg.C for 1-2 hours to prepare an aqueous solution of tetraammine Pt(II) dichloride. Then, aqueous ammonia is added to the tetraammine Pt(II) dichloride solution, the mixture is concentrated with heat, as it is kept ammonium-alkal side, then subjected to filtration and drying.

6. 发明专利

JPH0797221A PRODUCTION OF HEXAHYDROXOPLANTIC (IV) ACID 失效
公开(公告)号：JPH0797221A
公开(公告)日：1995-04-11
申请号：JP26188393
申请日：1993-09-25
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00
摘要： PURPOSE:To readily and inexpensively produce hexahydroxoplantic (IV) acid by a process not to contain an organic substance and by carrying out waste liquid treatment only by neutralization. CONSTITUTION:Hexahydroxoplantic (IV) acid is produced by neutralizing sodium hexahydroxoplantinate by ion exchange by bringing sodium hexahydroxoplantinate into contact with an inorganic acid through a cation exchange resin. In this case, the neutralization is done by exchange of only Na of sodium ehxahydroxoplantinate with H in the inorganic acid without inclusion of an anion.

7. 发明专利

JPH10218625A PRODUCTION OF TETRAAMMINE PLATINUM (II) DICHLORIDE CRYSTAL 失效
公开(公告)号：JPH10218625A
公开(公告)日：1998-08-18
申请号：JP2259197
申请日：1997-02-05
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , B01J31/22
摘要： PROBLEM TO BE SOLVED: To obtain an impurity-free tetraammine platinum (II) dichloride crystal by adding aqueous ammonia to an aqueous solution of dichlorodiamine platinum (II), concentrating the solution, as its ammonia alkalinity is maintained, filtering and drying the precipitate. SOLUTION: Chloroplatinic acid or its salt is allowed to react with aqueous ammonia at 60-80 deg.C. Hydrochloric acid is added to the resultant tetraammine Pt(II) dichloride and they are heated under reflux to precipitate trans- dichlorodiammine Pt(II). This precipitate is filtered and washed with water to collect dichlorodiammine Pt(II) ammonia. Then, aqueous ammonia is added to this dichlorodiammine Pt(II) in an amount of about 5-fold equivalents needed for the reaction, the mixture is placed in a pressure tightly sealable reaction vessel, heated at 60-80 deg.C, then cooled down, the precipitate is filtered and dried. Thus, the objective tetraammine Pt(II) dichloride can be produced in the form of crystals, which has excellent operability and stability and is useful as a catalyst carrier.

8. 发明专利

JPH07138025A PRODUCTION OF TETRAAMMINE PLATINUM (II) DICHLORIDE 失效
公开(公告)号：JPH07138025A
公开(公告)日：1995-05-30
申请号：JP30740293
申请日：1993-11-12
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00 , C07F15/00
摘要： PURPOSE:To provide a process for the production of tetraammine platinum(II) dichloride with decreased number of steps and reduced ammonia water consumption in high purity to dispense with the post-purification operation. CONSTITUTION:Hexachloroplatinic(IV) acid solution is mixed with a reducing agent to reduce the platinum to bivalent state. Ammonia water is added to the product to form the crystal of Magnus salt. The crystal is collected by filtration, washed with water and reacted with ammonia water in an autoclave to obtain the objective compound. Impurities are removed by the washing of the Magnus salt with water, the production of impurity is inhibited since the Magnus salt is reacted exclusively with ammonia water and the reaction of the Magnus salt with ammonia water is performed in a closed system.

9. 发明专利

JPH03285030A METHOD FOR RECOVERING AND REFINING RHODIUM 失效
公开(公告)号：JPH03285030A
公开(公告)日：1991-12-16
申请号：JP8357190
申请日：1990-03-30
申请人： TANAKA PRECIOUS METAL IND
发明人： ICHIISHI TOMOSHI , SHIBAZAKI TAKUO
IPC分类号： C22B11/00
摘要： PURPOSE:To simply recover low concn. Rh at a high recovering rate and high purity by adding SnCl2 and CuCl2 to a rhodium-hydrochloric acid soln. having specified hydrochloric acid concn. and absorbing Rh by dialkyl sulfide- impregnated resin. CONSTITUTION:Hydrochloric acid is added to a rhodium-hydrochloric acid soln. including base metals and having low Rh concn. to regulate the hydrochloric acid concn. to 1 to 6 N. Next, SnCl2 and CuCl2 are added to this soln. The amounts of the SnCl2 and CuCl2 to be added are preferably regulated to 10 to 50 times respectively, by molar ratio, to Rh. After that, this soln. is brought into contact with porous resin impregnated with preferably >=30wt.% dialkyl sulfide to adsorb Rh. Next, this porous resin adsorbed with Rh is washed by dilute hydrochloric acid of 0.5 to 3 N. to remove Sn, Cu or the like and is thereafter baked at about 800 deg.C. The obtd. rhodium oxide is reduced by a hydrogen gas, is thereafter mixed with NaCl, in which a Cl2 gas is blown, and chlorination is executed at 800 to 950 deg.C for >= one hr. In this way, high purity Rh can be obtd. at approximately 100% recovering rate in the shape of soluble sodium salt of chlorhodic acid.

10. 发明专利

JPH0797222A PRODUCTION OF POTASSIUM HEXAHYDROXOPLATINATE 失效
公开(公告)号：JPH0797222A
公开(公告)日：1995-04-11
申请号：JP26188493
申请日：1993-09-25
申请人： TANAKA PRECIOUS METAL IND
发明人： SHIBAZAKI TAKUO
IPC分类号： C01G55/00
摘要： PURPOSE:To produce high-purity potassium hexahydroxoplatinate without gener ating ethanol-containing waste liquid. CONSTITUTION:Potassium hydroxide is added to hexahydroxoplatinic (IV) acid to generate only water except potassium hexahydroxoplatinate.

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