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    • 9. 发明授权
    • Process for the production of a spray-dried nonionic washing aid
    • 用于生产喷雾干燥的非离子洗涤助剂的方法
    • US4661281A
    • 1987-04-28
    • US750807
    • 1985-06-28
    • Wolfgang SeiterIngo WegenerHerbert Reuter
    • Wolfgang SeiterIngo WegenerHerbert Reuter
    • C11D1/72C11D3/12C11D11/02B01J2/04C11D3/075C11D17/06
    • C11D11/02C11D1/72C11D3/128
    • A free-flowing washing powder of low specific gravity (powder density 300 to 500 g/l) and containing large quantities of nonionic surfactants is produced by spray-drying an aqueous suspension containing on the spray-dried basis (A) from 15 to 30% by weight of nonionic tensides, (B) from 8 to 18% by weight of sodium silicate, (C) from 25 to 55% by weight of finely crystalline zeolite, (D) from 0 to 25% by weight of sodium tripolyphosphate, (E) no more than 3% by weight of soap and synthetic anionic tensides, and from 35 to 50% by weight of water. The suspension, which has a temperature of from 75.degree. C. to 90.degree. C., is sprayed through nozzles into a drying zone under a pressure of from 35 to 100 bar. The drying gas flowing in countercurrent has an entry temperature of from 160.degree. C. to 240.degree. C. and an exit temperature of from 80.degree. C. to 95.degree. C. The spray-dried product contains from 9 to 16% by weight of water which is removable at a drying temperature of 130.degree. C.
    • 通过将含有喷雾干燥基(A)的水性悬浮液喷雾干燥15〜30秒,制备低比重(粉末密度为300〜500g / l),含有大量非离子表面活性剂的自由流动洗涤粉 (B)8〜18重量%的硅酸钠,(C)25〜55重量%的细晶沸石,(D)0〜25重量%的三聚磷酸钠, (E)不超过3重量%的皂和合成的阴离子表面活性剂,以及35至50重量%的水。 将温度为75℃至90℃的悬浮液在35至100巴的压力下通过喷嘴喷射到干燥区中。 流向逆流的干燥气体的入口温度为160℃至240℃,出口温度为80℃至95℃。喷雾干燥产物含有9至16重量%的 在干燥温度为130℃时可以除去的水