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Tin bath

In pyrolysis employing molten tin, a flow of the urea on the surface is eventually converted to a sheet of cmde CA 15—20 mm thick. After reaching the edge of the tin bath, the moving sheet falls into a mill. The resultant powdered cmde CA (contaminated with tin metal) is subjected to acid hydrolysis to convert aminotriazines (30—40%) to CA. Tin losses can amount to 15 kg/1 product. [Pg.421]

Zinn-asche, /. tin ashes, stannic oxide, -dtzfarbe, /. (Cali o) tin discharge paste, -bad, n. tin bath, -beize, /. tin mordapt, tin spirit, -beizendruck, m. tin ordant printing, -bergwerk, n. tin mine, -blatt, fu tin foil. n. tin. plate, sheet tin. [Pg.531]

When the article has attained the temperature of the tinning bath, the flux cover is drawn to one side of the bath with a paddle and the article is immediately withdrawn through the flux-free area of the tin surface. The quality of the coating may be improved by dipping the tinned article into a second tinning pot in which the tin is covered with a layer of molten grease such as tallow, and is at a temperature of 240-270°C. [Pg.390]

An aqueous solution of zinc chloride, acidified with hydrochloric acid, may be used as a flux. A light flux cover is used on the tinning bath and this is normally produced and maintained by the carry-in of flux solution on the work. The bath temperature should be 250-260°C. Bright annealed copper wire may be fluxed in stannous chloride and tinned at 300° C excess tin is wiped off by pulling the emerging wire between lightly clamped rubber blocks. [Pg.391]

Tin baths are becoming increasingly important for the soldering of electronic components with printed circuits. [Pg.60]

Fig. 14. Effect of decationizing pretreatment on the liquefaction, (a I) First-stage noncata-lytic hydrogen-transferred Morwell coal in the two-stage hydrotreatment (4(X)°C-10 min, 20 atm N>, tube bomb and molten tin bath, rapid heating) 4HFI/coal = 3.0g/3.()g. (a2) Second-stage catalytic hydrotreated Morewell coal in the two-stage hydrotreatment (400°C-20 min, 50 cc autoclave, slow heating). Fig. 14. Effect of decationizing pretreatment on the liquefaction, (a I) First-stage noncata-lytic hydrogen-transferred Morwell coal in the two-stage hydrotreatment (4(X)°C-10 min, 20 atm N>, tube bomb and molten tin bath, rapid heating) 4HFI/coal = 3.0g/3.()g. (a2) Second-stage catalytic hydrotreated Morewell coal in the two-stage hydrotreatment (400°C-20 min, 50 cc autoclave, slow heating).
The use of mixed complex baths is interesting since the concentration of one free metal ion may be altered by varying the amount of one ligand. Thus, in a copper—tin bath, cyanide content may be varied to alter the activity of copper ions, with little or no effect on tin which is present as stannate or as a pyrophosphate complex. It is evident that some knowledge of the coordination chemistry will reduce the degree of empiricism in developing alloy plating baths. [Pg.13]

The newest tin baths, tin—lead baths, and lead baths recendy entering the market, are based on methanesulfonates. The higher makeup cost of tin methanesulfonate baths, about 1.6 times the cost of fluoborate baths, may be justified where restrictions on fluoborates and boric acid in wastes exist. [Pg.164]

Tin is rarely used as such, but is widely used for alloys such as bronze and lead-tin bath metal, and for tinning iron and copper equipment. [Pg.197]

Figure 3 shows the changes of the temperature and the pressure in the reaction vessel as it was immersed into the tin bath and moved into water bath. From this figure, the water reaches Tc after 15 sec, while for Pc, it takes only 6 sec. Therefore, supercritical condition of water can be achieved after 15 sec. Under such conditions, supercritical water treatment was made for about 5 sec against biomass samples and their cell wall components. [Pg.1341]

Fig. 4. HPLC chromatograms of the water-soluble portion from woods and their components as treated in supercritical water. (Tin bath 500 C)... Fig. 4. HPLC chromatograms of the water-soluble portion from woods and their components as treated in supercritical water. (Tin bath 500 C)...
Molten-Tin Process for Reactor Fuels (16). Liquid tin is being evaluated as a reaction medium for the processing of thorium- and uranium-based oxide, carbide, and metal fuels. The process is based on the carbothermic reduction of UO2 > nitriding of uranium and fission product elements, and a mechanical separation of the actinide nitrides from the molten tin. Volatile fission products can be removed during the head-end steps and by distilling off a small portion of the tin. The heavier actinide nitrides are expected to sink to the bottom of the tin bath. Lighter fission product nitrides should float to the top. Other fission products may remain in solution or form compounds with... [Pg.178]

H2O results in a darker and blacker colour. Copper gives a warmer and deeper colour. If the textile is placed in a tin bath after drying, the colour turns more yellow. It is assumed that the Sn(II) ions displace some of the calcium ions. This process is named aviveren in Dutch [20]. [Pg.670]

As with all immersion metal systems, the copper needs to be perfectly clean and textured before the tin plating step. A predip is used to main tain proper chemical balance in the tin bath and prevent contamination. The tin deposition is not a direct galvanic displacement, since tin is more electronegative than copper. Thiourea is used in tin chemical formulation to create a copper-thiourea complex on the surface. This complex becomes more electronegative than tin, and then participates in the immersion reaction. Because of the need to drive the reaction, the tin bath contains relatively high concentrations of chemicals, which must be thoroughly rinsed. Waste treatment of the system is comphcated due to high levels of thiourea. [Pg.762]


See other pages where Tin bath is mentioned: [Pg.160]    [Pg.200]    [Pg.774]    [Pg.1227]    [Pg.339]    [Pg.1617]    [Pg.160]    [Pg.82]    [Pg.414]    [Pg.1340]    [Pg.1343]    [Pg.81]    [Pg.295]    [Pg.214]    [Pg.1214]    [Pg.51]    [Pg.160]    [Pg.180]    [Pg.214]    [Pg.251]    [Pg.470]    [Pg.312]    [Pg.211]    [Pg.676]    [Pg.13]   
See also in sourсe #XX -- [ Pg.169 ]




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Bath tin/lead

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