Process for the disproportionation of alkylated aromatic primary amines
    3.
    发明授权
    Process for the disproportionation of alkylated aromatic primary amines 失效
    烷基化芳族伯胺歧化的方法

    公开(公告)号:US4801751A

    公开(公告)日:1989-01-31

    申请号:US913826

    申请日:1986-09-30

    IPC分类号: C07C209/68

    CPC分类号: C07C209/68

    摘要: Alkylated aromatic primary amines undergo disproportionation and transalkylation in the presence of a carbon-containing catalyst at a temperature between 200.degree. C. and 500.degree. C. The carbon-containing catalyst may have carbon as the only active component, or optionally, may also contain a Group VIIIA metal, such as platimum, palladium, nickel, cobalt or mixtures thereof.

    摘要翻译: 烷基化芳族伯胺在含碳催化剂存在下,在200℃至500℃的温度下进行歧化和烷基转移。含碳催化剂可以具有碳作为唯一的活性组分,或任选还可含有 ⅦA族金属,如铂,钯,镍,钴或其混合物。

    Synthesis of ethylidene bis-formamide using formic acid
    7.
    发明授权
    Synthesis of ethylidene bis-formamide using formic acid 失效
    用甲酸合成亚乙基双甲酰胺

    公开(公告)号:US4906777A

    公开(公告)日:1990-03-06

    申请号:US260090

    申请日:1988-10-19

    IPC分类号: C07C231/08

    CPC分类号: C07C231/08

    摘要: Ethylidene bis-formamide, a precursor for the monomer N-vinylformamide, is made in high yield by heating together formamide and acetaldehyde in a mol ratio of at least 3:1 and in a reaction mixture which is at least 20 weight percent formic acid. In a preferred procedure the acetaldehyde is added after the formamide has been preheated and formic acid is present. Yields of ethylidene bis-formamide of over 50%, based on the acetaldehyde, are obtained in relatively short reaction times, before loss of substantial amounts of recoverable formamide through hydrolysis.

    摘要翻译: 亚乙基双甲酰胺是单体N-乙烯基甲酰胺的前体,通过以至少3:1的摩尔比和在至少20重量%甲酸的反应混合物中加热甲酰胺和乙醛一起高产率地制备。 在优选的方法中,在甲酰胺已被预热并存在甲酸之后加入乙醛。 在相对较短的反应时间内,在通过水解失去大量可回收的甲酰胺之前,以乙醛为基础,获得超过50%的亚乙基双甲酰胺的产率。

    Modification of poly (vinylamine)
    8.
    发明授权
    Modification of poly (vinylamine) 失效
    聚乙烯胺改性

    公开(公告)号:US5324787A

    公开(公告)日:1994-06-28

    申请号:US977973

    申请日:1992-11-18

    CPC分类号: C08F8/00

    摘要: Poly(vinylamine) homopolymers and copolymers are hydrophobically modified by reaction of amine units present in the polymer with a saturated aliphatic or aromatic glycidyl ether compound. The resulting polymers are useful as flocculants in separating water from suspended solids and are especially effective in improving fines retention in papermaking. Poly(vinylamine hydrochloride) modified in this manner with butyl glycidyl ether is shown to be very efficient in retaining the paper product fines present in recycle paper pulps.

    摘要翻译: 通过聚合物中存在的胺单元与饱和脂族或芳族缩水甘油醚化合物的反应,聚(乙烯基胺)均聚物和共聚物被疏水改性。 所得聚合物可用作从悬浮固体中分离水中的絮凝剂,并且特别有效地改善造纸中的细粉保留。 以这种方式用丁基缩水甘油醚改性的聚(乙烯胺盐酸盐)显示出非常有效地保留存在于回收纸浆中的纸制品细粉。

    Process for the disproportionation of alkylated aromatic primary amines
    10.
    发明授权
    Process for the disproportionation of alkylated aromatic primary amines 失效
    烷基化芳族伯胺歧化的方法

    公开(公告)号:US4935545A

    公开(公告)日:1990-06-19

    申请号:US231751

    申请日:1988-08-12

    IPC分类号: C07C209/68

    CPC分类号: C07C209/68

    摘要: Alkylated aromatic primary amines undergo disproportionation and transalkylation in the presence of a catalyst comprising activated carbon or unmodified graphite and a Group VIIIA metal at a temperature between 200.degree. C. and 500.degree. C. Suitable Group VIIIA metals are selected from the group consisting of platinum, palladium, nickel, cobalt or mixtures thereof.

    摘要翻译: 烷基化芳族伯胺在200℃至500℃之间的温度下,在包含活性炭或未改性石墨和ⅦA族金属的催化剂存在下,进行歧化和烷基转移。合适的Ⅷ族金属选自铂 ,钯,镍,钴或其混合物。