Manufacture of solid materials in a moving bed reactor |
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| 申请号 | US3630668D | 申请日 | 1969-06-09 | 公开(公告)号 | US3630668A | 公开(公告)日 | 1971-12-28 |
| 申请人 | CANADIAN IND; | 发明人 | COULTER-BLACK JOHN WRIGHT; MCIRVINE JOHN DOUGLAS; SIMPSON JOHN DUDLEY; | ||||
| 摘要 | A process for manufacturing solid materials employing a reactor containing a moving bed of the product particles having separate reaction and cooling zones. One of the reactants is gaseous. The process can be employed for the manufacture of ammonium metabisulphite, ammonium nitrate and ammonium phosphate. | ||||||
| 权利要求 | 2. A process as claimed in claim 1 wherein the material is ammonium metabisulfite, the bed temperature lies in the range 10* to 130* C., and the reactants are sulfur dioxide, ammonia and water vapor in such proportions that the molar ratio of sulfur dioxide to ammonia is at least 0.5:1.0 and the molar ratio of sulfur dioxide to water has a maximum value of 2.0:1.0 and a minimum value corresponding to the water content of the reactant gases, said water content approaching saturation with respect to saturated ammonium bisulfite solution. 2. maintaining a circulation of particles within the bed between the reaction zone and the cooling zone by passage of gas through the bed, thus transferring heat from the reaction zone to the cooling zone, 3. cooling the particles in the cooling zone so as to maintain the temperature of the particles in the reaction zone of the bed within the temperature range at which the reaction forming the material takes place, and 3. A process as claimed in claim 2 wherein the sulfur dioxide reactant is introduced into the Bed in admixture with the gas employed to circulate the bed particles. 4. A process as claimed in claim 3 wherein the sulfur dioxide reactant is introduced into the bed as a sulfur-dioxide-containing flue gas. 4. feeding the reactants to the reaction zone from at least two separate reactant inlets so that mixing of the reactants occurs in the reaction zone distant from the cooling zone, the proportions of the reactants being adapted to provide the material which deposits on the surface of the moving particles of the bed. 5. A process as claimed in claim 1 wherein the material is ammonium nitrate, the bed temperature lies in the range 40* to 85* C., and the reactants are ammonia and liquid nitric acid in equimolar proportions. 6. A process as claimed in claim 5 wherein the ammonia reactant is introduced into the bed in admixture with the gas employed to circulate the bed particles. 7. A process as claimed in claim 1 wherein the material is monoammonium phosphate and/or diammonium phosphate, the bed temperature lies in the range 50* to 90* C., and the reactants are ammonia and phosphoric acid in the stoichiometric proportions corresponding to the ammonium phosphate reaction product. 8. A process as claimed in claim 7 wherein the ammonia reactant is introduced into the bed in admixture with the gas employed to circulate the bed particles. 9. A process as claimed in claim 1 wherein the gas employed to circulate the bed particles is air or nitrogen. |
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