Foam based on an impact copolymer
    4.
    发明授权
    Foam based on an impact copolymer 失效
    基于影响共聚物的泡沫

    公开(公告)号:US5208265A

    公开(公告)日:1993-05-04

    申请号:US924492

    申请日:1992-08-04

    摘要: In foams having a density of from 0.01 to 0.2 g/cm.sup.3 and a cell count of from 2 to 1,000 cells/mm.sup.2 and based on an impact copolymer, the impact copolymer consists ofa) from 1 to 55% by weight of a block copolymer ofa.sub.1) from 35 to 65% by weight of ethylene anda.sub.2) from 35 to 65% by weight of propylene andb) from 45 to 99% by weight of a random copolymer ofb.sub.1) from 0.5 to 6% by weight of ethylene and from 94 to 99.5% by weight of propylene, or ofb.sub.2) from 0.5 to 12% by weight of but-1-ene and 88 to 99.5% by weight of propylene.

    摘要翻译: 在密度为0.01至0.2g / cm 3和细胞计数为2至1,000个/ mm 2并基于抗冲共聚物的泡沫中,抗冲共聚物由以下组成:a)1至55重量%的嵌段共聚物 的a1)35至65重量%的乙烯和a2)35至65重量%的丙烯和b)45至99重量%的无规共聚物,b1)0.5至6重量%的乙烯 和94〜99.5重量%的丙烯,或b2)0.5〜12重量%的丁-1-烯和88〜99.5重量%的丙烯。

    Process for the separation of hydrogen cyanide from gases and waste gases
    9.
    发明授权
    Process for the separation of hydrogen cyanide from gases and waste gases 失效
    从气体和废气中分离氢氰化物的方法

    公开(公告)号:US5200161A

    公开(公告)日:1993-04-06

    申请号:US878916

    申请日:1992-05-06

    摘要: A process is disclosed for the separation of hydrogen cyanide from gases and waste gases by a throughflow or circulation scrubbing, in which formaldehyde is added at a controlled rate to the aqueous scrubbing liquid to form glycol nitrile. This addition is controlled by measuring the HCN tension in a measuring stream which has been branched off and which is first treated with hydrogen peroxide so that free H.sub.2 O.sub.2 is still detectable after 1 to 100 seconds and the pH is adjusted to a constant value before measurement of the HCN tension is carried out. The process prevents overdosing with formaldehyde which could not always be prevented in previously known processes in which the addition of formaldehyde was regulated by measuring the cyanide specific redox potential.

    摘要翻译: 公开了一种通过通流或循环洗涤从气体和废气中分离氰化氢的方法,其中将甲醛以受控的速率加入到水洗涤液中以形成二醇腈。 该添加通过测量已经分支并且首先用过氧化氢处理的测量流中的HCN张力来控制,使得在1至100秒之后仍然可以检测到游离H 2 O 2,并且在测量之前将pH调节至恒定值 HCN张力进行。 该方法防止了甲醛过量,这在以前已知的通过测量氰化物特定的氧化还原电位来调节甲醛的方法中是不可避免的。

    Method of lowering the AOX content in water
    10.
    发明授权
    Method of lowering the AOX content in water 失效
    降低水中AOX含量的方法

    公开(公告)号:US5068038A

    公开(公告)日:1991-11-26

    申请号:US584081

    申请日:1990-09-18

    IPC分类号: C02F1/52 C02F1/72 C02F9/00

    摘要: The content of halo-organic pollutants in water is lowered to residual AOX values below 1 mg/l, preferably below 0.1 mg/l by adjusting the Fe.sup.2+ comtent of the water to 20 to 1000 mg/l, adding a precipitated or pyrogenic silicic acid, converting 20 to 1000 mg of the Fe.sup.2+ into Fe.sup.3+ by adding in an oxidation agent, preferably hydrogen peroxide, and separating the iron (III) hydroxy complexes formed and the silicic acid, which contain the halo-organic pollutants in an adsorbed state, at pH 5-10. The method can be controlled in a simple manner as regards the addition of Fe.sup.2+ and oxidation agent via the Fe.sup.2+ /Fe.sup.3+ redox potential.

    摘要翻译: 水中的卤代有机污染物的含量通过将水的Fe 2+添加到20至1000mg / l,降低至低于1mg / l,优选低于0.1mg / l的残余AOX值,加入沉淀或热解的硅酸 通过加入氧化剂,优选过氧化氢,将形成的铁(III)羟基络合物和含有卤素 - 有机污染物的硅酸以吸附状态分离,将20至1000mg的Fe 2+转化成Fe 3+, pH 5-10。 关于通过Fe2 + / Fe3 +氧化还原电位加入Fe 2+和氧化剂,可以简单地控制该方法。