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    • 30. 发明授权
    • Reactor for the gas phase nitration of cellulose
    • 反应器用于气相硝化纤维素
    • US4334060A
    • 1982-06-08
    • US202222
    • 1980-10-30
    • Marcel Blais
    • Marcel Blais
    • C08B5/02C08B17/04
    • C08B5/02C08B17/04
    • A continuous process is provided for the vapor phase nitration of cellulosen a novel reactor having a gas tight housing containing a table with a perforated surface. Cellulose in porous sheet form is continuously passed into the reactor over the perforated table while continuously introducing nitric acid vapor into the housing through the perforations to provide a cushion of nitric acid gas supporting the sheet and forcing nitric acid vapor through the porous sheet. Water vapor formed in the reaction and unreacted nitric acid vapor are continuously removed from the housing, together with the nitrocellulose sheet produced. The rate at which the cellulose sheet is passed through the reactor depends on the rate at which the nitric acid is introduced and the degree of nitration desired. The cellulose can be partially nitrated by the novel process and further nitrated with nitric acid in liquid phase. The process produces a uniform nitrocellulose product suitable for use in propellants.
    • 提供了一种用于在具有气密壳体的新型反应器中纤维素气相硝化的连续方法,该壳体包含具有穿孔表面的工作台。 多孔片形式的纤维素连续地通过穿孔台进入反应器,同时通过穿孔将硝酸蒸气连续地引入壳体,以提供支撑片材的硝酸气体衬垫并迫使硝酸蒸气穿过多孔片材。 反应中形成的水​​蒸汽和未反应的硝酸蒸气与所生产的硝酸纤维素片一起从壳体中连续除去。 纤维素片通过反应器的速率取决于硝酸的引入速率和所需的硝化程度。 纤维素可以通过新方法部分硝化,并进一步用硝酸在液相中硝化。 该方法产生适用于推进剂的均匀硝化纤维素产品。