In one embodiment, the reaction solvent is aqueous. The resulting product stream comprises a high density zinc bromide solution. According to the MSDS the density of Zinc Bromide is 4.22g/ml and this is where I am getting turned around I need to make a solution of Zinc Bromide that has a specific gravity of 2.4. The product stream 70 can be split so that a portion of the product stream is recycled back to the tank 50 until the desired concentration of zinc bromide is achieved. The mixing vessel was fed 3.9 g/min bromine and 2.4 g/min water and allowed to mix with recycled zinc bromide solution containing 59.5% zinc bromide. Using the American Public Health Association color standard (APHA), the color index for resulting zinc bromide was approximately APHA 60. This direct reaction can be accomplished with relatively straightforward equipment in a rapid, safe and efficient manner. The reaction vessel can comprise either a one stage or a multiple stage reactor. 13. Assuming 75% of that light falls onto your desk, how many photons per second are striking your desktop if the light has a wavele, calculate the number of moles of oxygen in 2.00L at 24 degrees celcius and 750 torr. Broadly, the method for making zinc bromide according to this invention comprises: (a) dissolving bromine in a reaction solvent comprising a metal halide salt; and (b) contacting metallic zinc with the resulting bromine solution to form a zinc bromide solution. The recycle rate was approximately 232 ml/min. 1,483,852 to Rosenstein discloses the production of zinc chloride by reacting lead-zinc alloy in water with chlorine gas. The product is essentially color free. During this method, bromine 54 is dissolved in the reaction solvent in a feed mixing tank 50. A method for making zinc bromide from metallic zinc and bromine comprising contacting zinc with bromine dissolved in a reaction solvent containing a metal halide salt. Heat from the reaction causes water to evaporate as steam. TETRA INVESTMENT HOLDING CO., INC., TEXAS, Free format text: Somewhere I am missing the calculation concept that will allow me to find the mass of zinc bromide (solids) to add to 1 liter of water to get the specified specific gravity? The column used for this experiment was a commercially available 12-inch tall column having an inside diameter of 1 inch. Alternatively, the reaction vessel comprises at least two stages and the reaction solvent is recirculated after the first stage. JPMORGAN CHASE BANK, N.A., TEXAS, Free format text: Alternatively, the reaction solvent initially comprises aqueous calcium bromide alone or in combination with zinc bromide. Preferably, the bromine is added continuously at such a rate so as to maintain the reaction temperature below about 60° C. or the boiling point of bromine. U.S. Pat. The reaction of metallic zinc with halides to produce a zinc halide was reported over 150 years ago. For the purpose of illustration, reference is made for convenience hereafter to aqueous zinc bromide as the reaction solvent with the understanding that other suitable reaction solvents may also be used. FIG. These reactions did not include solvent, were conducted at high temperatures and were accompanied by the presence of excess quantities of free bromine. Production of Zinc Bromide Solution from Zinc Metal, Bromine and Water Using Higher Bromine Concentration. 17. This zinc bromide as produced is essentially color free. The recycle rate was approximately 232 ml/min. The method of claim 12 wherein the reaction solvent comprises a base metal halide. Assignors: TETRA PRODUCTION TESTING SERVICES, LLC, TETRA TECHNOLOGIES, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Wahl et al., U.S. Pat. A preferred temperature range is from about 30° C. to about 60° C. although temperatures below 30° C. are within the scope of this invention. Another preferred method for making zinc bromide comprises: (a) dissolving bromine in a reaction solvent; (b) feeding the reaction solvent to a reaction vessel containing metallic zinc; (c) contacting the metallic zinc with the reaction solvent to form a zinc bromide solution; (d) obtaining a zinc bromide product stream from the reaction vessel; and (e) recirculating at least a portion of the zinc bromide solution back to the reaction vessel as the reaction solvent in (a)-(c). The method of claim 1 wherein the temperature of the method is controlled by continuously adding bromine to the reaction solvent at a rate that maintains the reaction temperature below the boiling point of bromine. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). The mixing vessel was a commercially available round bottom flask sitting on a magnetic stir plate. The system can also be operated without the mixer 50. Fr., [4], 39, 195-201 (1926) teaches that bromine and zinc do not react with each other directly and require the formation of the intermediates ZnO and HBr. Zinc bromide solution can be concentrated until zinc bromide is precipitated. This is typical solvent/solute behavior. More recently, zinc bromide was prepared by the addition of moist bromine to hot zinc as disclosed in R. Pajeau, Bull Chim. Bromine has a noxious, acrid odor, and the maximum health and safety exposure limit is currently 1 ppm in the air. Therefore, it is reasonable to include that products from this invention containing lower concentrations of bromine should also have lower bromine odor. During this method, the heat of formation of zinc bromide is easily dissipated with limited cooling of the system. In the practice of the method of this invention, the preferred reaction temperature is maintained at less than about 60° C. Bromine can be added continuously to the reaction solvent. The preferred halide ions can comprise bromide or chloride, but iodide ions are also within the scope of this invention. What is the number of molecules of water that ionize for every 10^10 molecules of water at 25 degrees C? Because commercial usage of zinc bromide is increasing, large-scale production of the compound is necessary. 2. TETRA TECHNOLOGIES INC., TEXAS, Free format text: 2 or a two-stage vessel 40 illustrated in FIG. MERGER;ASSIGNOR:TETRA-CHLOR, INC.;REEL/FRAME:011149/0327, Owner name: Fr. The solution was cooled to 51.5° C. by the heat exchanger and fed to the column at the rate of 237 ml/min. A method for making zinc bromide comprising: (a) dissolving bromine in an aqueous reaction solvent; (b) feeding the reaction solvent resulting from step (a) to a reaction vessel containing metallic zinc; (c) contacting the metallic zinc with the reaction solvent to form a zinc bromide solution; (d) obtaining a zinc bromide product stream essentially free of bromine from the reaction vessel; (e) recirculating at least a portion of the zinc bromide product stream back to the reaction vessel as the reaction solvent in (a)-(c).