Continuous production of low molecular weight polyamides
    34.
    发明授权
    Continuous production of low molecular weight polyamides 失效
    连续生产低分子量聚酰胺

    公开(公告)号:US5674973A

    公开(公告)日:1997-10-07

    申请号:US578703

    申请日:1995-12-28

    CPC分类号: C08G69/16 C08G69/04

    摘要: A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting materials is heated in liquid phase in a first reaction zone until a conversion of at least 70% is reached, and undergoes adiabatic decompression and further polymerization in another reaction zone, wherein, in the first reaction zone, 0.5-7% by weight of water are employed, the temperature is increased to the range from 220.degree. to 310.degree. C., and polymerization is carried out until a conversion of at least 85% is reached and, in the second reaction zone, after the decompression further polymerization is carried out in the range from 215.degree. to 300.degree. C. without heat input.

    摘要翻译: PCT No.PCT / EP94 / 01998 Sec。 371日期1995年12月28日第 102(e)1995年12月28日PCT PCT 1994年6月20日PCT公布。 第WO95 / 01389号公报 日期1995年1月12日一种在聚酰胺形成条件下从至少一种内酰胺和水的混合物以及如果需要的话其它单体单元和/或常规添加剂和填料连续生产聚酰胺的方法,其中起始 材料在液相中在第一反应区中加热直到达到至少70%的转化率,并在另一个反应区进行绝热减压和进一步聚合,其中在第一反应区中为0.5-7重量%的水 ,温度升高到220℃至310℃,进行聚合直至达到至少85%的转化率,并且在第二反应区中,在进一步聚合进行进一步的聚合之后 在215〜300℃的范围内,无需热量输入。

    Carbon generator
    40.
    发明授权
    Carbon generator 失效
    碳发生器

    公开(公告)号:US4970055A

    公开(公告)日:1990-11-13

    申请号:US326321

    申请日:1989-03-21

    申请人: Harold E. Leggett

    发明人: Harold E. Leggett

    IPC分类号: B01J19/28 C09C1/48

    摘要: An apparatus and method for recovering carbon from a carbon-containing gas are provided. The apparatus comprises a burner assembly adapted to deposit carbon from the carbon-containing gas on the interior surface of a rotatable cylinder that is disposed in either a horizontal or inclined relation to a supporting surface. A device is provided for removing the deposited carbon from the interior surface of the rotatable cylinder, whereby the carbon deposited on the cylinder is recovered. Louvers having a series of baffles are mounted over the ends of the cylinder for regulating air flow into and flue gas flow from the cylinder, and elongate shafts having louvers therein are mounted to the ends of the cylinder for dissipating heat generated during operation by free or forced convection of air through the shaft louvers.

    摘要翻译: 提供了一种用于从含碳气体回收碳的装置和方法。 该装置包括燃烧器组件,其适于将碳从含碳气体沉积在可旋转气缸的内表面上,该可旋转气缸以与支撑表面水平或倾斜的关系设置。 提供了用于从可旋转圆筒的内表面去除沉积的碳的装置,由此回收沉积在圆筒上的碳。 具有一系列挡板的百叶窗安装在气缸的端部上,用于调节进入气流并从气缸排出气体的气流,其中具有百叶窗的细长轴安装在气缸的端部,以便在运行期间通过自由或 强制对流空气通过轴百叶窗。