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    • 2. 发明授权
    • Organic recycling with a pipe-cross or tubular reactor
    • 用管道交叉或管状反应器进行有机回收
    • US07534281B2
    • 2009-05-19
    • US11522083
    • 2006-09-15
    • Gary L. DahmsGary D. Greer
    • Gary L. DahmsGary D. Greer
    • C05C9/00
    • C05B7/00C05F7/00Y02A40/213C05B19/00C05C3/00C05G3/0058
    • The invention is directed to a process for enhancing the plant nutrient value of relatively low analysis organic waste material (e.g. sewage sludge) involves treating the waste material with an acid and base in a pipe-cross reactor or tubular to form a melt; spraying the melt onto a recycling bed of fines in a granulator and flashing off the water contained in the melt as steam; rolling the melt onto recycled fine particles in a granulator to form granulated particles; and drying these granulated particles in a to form an enhanced plant nutrient value composition (e.g. a fertilizer or soil conditioner having a greater NPK value than the original relatively low analysis organic waste material). The process further includes drawing off the fumes from the granulator, passing them through a dryer with the granulated particles, and subsequently oxidizing the fumes to eliminate volatile organic compounds and/or gaseous hydrocarbon pollutants be converting such into carbon dioxide and water vapor.
    • 本发明涉及一种用于增强相对低分析的有机废物(例如污水污泥)的植物营养价值的方法,其涉及在管交叉反应器或管中用酸和碱处理废料以形成熔体; 在造粒机中将熔体喷射到细粉的再循环床上,并将其作为蒸汽从包含在熔体中的水闪烁; 在造粒机中将熔体滚动到再循环的细颗粒上以形成造粒颗粒; 并且在a中干燥这些造粒颗粒以形成增强的植物营养价值组合物(例如具有比原始相对较低分析的有机废物材料更大的NPK值的肥料或土壤调理剂)。 该方法还包括从成粒机中除去烟雾,将其通过具有造粒颗粒的干燥器,随后氧化烟气以消除挥发性有机化合物和/或气态烃污染物转化为二氧化碳和水蒸气。
    • 4. 发明授权
    • Separation of lactams from a medium coating concentrated sulphuric trioxide in combination with the preparation of phosphate fertilizers
    • 从中等涂层浓缩的三氧化硫与制备磷酸盐肥料的组合中分离纤维素
    • US3820972A
    • 1974-06-28
    • US24972872
    • 1972-05-02
    • STAMICARBON
    • DE ROOIJ A
    • C05B11/06C07D201/16C05B11/08
    • C07D201/16C05B11/06C05B11/08C05B19/00
    • A process for the recovery of lactams from a Beckmann rearrangement mixture of lactams and sulphuric acid or sulphur trioxide, with the production of a phosphate-containing fertilizer is disclosed. The Beckmann rearrangement mixture is partially neutralized by the addition of ammonium or alkali metal hydroxide, sulphate or carbonate in an amount such that the molar ratio between the sulphate formed and the sum of the sulphate formed and the free sulphuric acid is at least 1/8:1. Thereafter, the resulting partially neutralized solution is extracted by a substantially water-immiscible, organic lactam solvent to separate lactam from the remainder of said mixture, and the remainder of said mixture after such extraction is used for the decomposition of rock phosphate with formation of gypsum and of a free phosphoric acid-containing solution. This latter solution, after removal of gypsum and neutralization of the solution with ammonia or alkali liquor is converted into a dihydrogen phosphate-containing solution from which dihydrogen phosphate, suitable for use in fertilizers, is recovered after evaporative concentration. The process provides for the ready separation of lactams from a Beckmann rearrangement reaction mixture, while at the same time producing, as a by-product, dihydrogen phosphate or a valuable dihydrogen phosphate containing fertilizer.