Recovery of trialkylamines and methyl formate from mixtures obtained in
the preparation of trimethylolalkanes
    1.
    发明授权
    Recovery of trialkylamines and methyl formate from mixtures obtained in the preparation of trimethylolalkanes 失效
    三氯甲烷制备中获得的混合物中的丙烯酰胺和甲基丙烯酸的回收

    公开(公告)号:US5149861A

    公开(公告)日:1992-09-22

    申请号:US664463

    申请日:1991-03-01

    CPC分类号: C07C29/88 C07C67/03

    摘要: Trialkylamines and methyl formate are recovered from reaction mixtures obtained in the preparation of trimethylolalkanes by reaction of n-alkanals with from 2.2 to 4.5 moles of formaldehyde in aqueous solution in the presence of from 0.6 to 3 mole of trialkylamine, each quantity based on 1 mole of alkanal, and subsequent hydrogenation in a process wherein the crude reaction mixturea) is heated to from 100.degree. to 200.degree. C., the water present in the reaction mixture is substantially separated off by distillation, together with any excess free trialkylamine, the trialkylamine present in the form of a trialkylammonium formate is freed to form a trimethylolalkane formate, the trialkylamine is distilled off and the trimethylolalkane formate is transesterified with methanol to trimethylolalkane and methyl formate in the presence or absence of a catalytic amount of an alkali metal alkoxide or alkaline earth metal alkoxide, orb) is substantially dewatered, any excess free trialkylamine being removed at the same time, the trialkylamine present in the form of a trialkylammonium formate is separated off by admixing the remaining mixture with methanol and heating the admixture to from 100.degree. to 200.degree. C. to form methyl formate and trialkylamine.

    摘要翻译: 三烷基胺和甲酸甲酯从制备三羟甲基烷烃得到的反应混合物中回收,通过在0.6至3摩尔三烷基胺存在的情况下,正链烷与2.2至4.5摩尔甲醛在水溶液中的反应,每个量基于1摩尔 然后在将粗反应混合物a)加热至100至200℃的过程中随后进行氢化,反应混合物中存在的水通过蒸馏与任何过量的游离三烷基胺基本上分离出来, 以三烷基铵甲酸盐形式存在的三烷基胺可以形成甲酸三羟甲基烷烃,在存在或不存在催化量的碱金属醇盐的条件下,将三烷基胺蒸馏除去,甲醇三甲氧基链烷烃甲酯与甲醇酯交换为三羟甲基烷烃和甲酸甲酯,或 碱土金属醇盐或b)基本脱水,任何过量游离的三烷基胺为 同时除去以三烷基甲酸铵形式存在的三烷基胺,通过将剩余的混合物与甲醇混合并将混合物加热至100至200℃以分离,形成甲酸甲酯和三烷基胺。

    Separation of isobutene non-reacted during polymerization of isobutene
    3.
    发明授权
    Separation of isobutene non-reacted during polymerization of isobutene 有权
    在异丁烯聚合反应时异丁烯的分离

    公开(公告)号:US07105616B2

    公开(公告)日:2006-09-12

    申请号:US10473595

    申请日:2002-04-10

    申请人: Heinz Auer

    发明人: Heinz Auer

    IPC分类号: C08F4/06

    CPC分类号: C08F6/003 C08L23/20

    摘要: A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and, if required, an inert diluent, is described. Problems with foam formation when the unconverted isobutene is being distilled off are avoided if the heated reaction discharge is let down into a flash container and/or not more than 900 m3/h of vapor are expelled per square meter of liquid surface and/or the resulting foam is destroyed, for example in a wet cyclone.

    摘要翻译: 描述了基本上包含聚异丁烯,未转化的异丁烯和如果需要的惰性稀释剂的异丁烯的阳离子聚合的液体反应排放的方法。 当蒸发掉未转化的异丁烯时,如果将加热的反应物排出物放入闪蒸容器中,并且/或不超过900m 3 / h的蒸气排出每平方 液体表面和/或所得泡沫破坏,例如在湿式旋风分离器中。

    Polyisobutene composition
    4.
    发明授权
    Polyisobutene composition 有权
    聚异丁烯组成

    公开(公告)号:US07049383B2

    公开(公告)日:2006-05-23

    申请号:US10482807

    申请日:2002-07-02

    IPC分类号: C08F110/10

    摘要: A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight Mmax of from 3 500 to 8 000 is described, which comprises at least one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.

    摘要翻译: 描述了在分子量M max> 3 000至8 000时具有总分子量分布曲线的全局最大值的聚异丁烯组合物,其包含至少一个局部最大值,分子量为 存在的异丁烯低聚物作为流动改进剂和沸腾助剂。 将它们加入到较高分子量的异丁烯聚合物中,优选在蒸馏之前或在蒸馏过程中,用于除去未转化的异丁烯和/或惰性稀释剂。

    Method for the manufacture of solid electrolyte capacitors
    6.
    发明授权
    Method for the manufacture of solid electrolyte capacitors 失效
    固体电解电容器的制造方法

    公开(公告)号:US4984342A

    公开(公告)日:1991-01-15

    申请号:US296800

    申请日:1989-01-13

    摘要: A method for manufacturing solid electrolyte capacitors is provided. Pursuant to the method, pores in formed sintered members composed of a valve metal are first nearly filled with manganese dioxide that is produced by pyrolysis of solutions that contain manganese nitrate. Following thereupon, the sintered members are immersed into a dry melt of manganese nitrate that may comprise an additive of manganese dioxide and/or silicon dioxide powder. Subsequently, the members are introduced into a furnace, and heated to approximately 100.degree. C. in dry air. Subsequently, fine drops of water are applied onto the surface of the heated sintered members and the pyrolysis is ended at temperatures of approximately 200.degree. to about 350.degree. C. in a mist of water vapor that flows by.

    摘要翻译: 提供了制造固体电解质电容器的方法。 根据该方法,由阀金属构成的成形烧结体中的孔首先接近充满由含有硝酸锰的溶液热分解产生的二氧化锰。 随后,将烧结构件浸入可能包含二氧化锰和/或二氧化硅粉末的添加剂的硝酸锰的干燥熔体中。 随后,将构件引入炉中,并在干燥空气中加热至约100℃。 随后,将微滴水施加到加热的烧结构件的表面上,并且在大约200℃至大约350℃的温度下,在流过的水蒸汽雾中结束热解。

    Method for producing highly reactive polyisobutenes
    7.
    发明授权
    Method for producing highly reactive polyisobutenes 有权
    生产高反应性聚异丁烯的方法

    公开(公告)号:US06987165B2

    公开(公告)日:2006-01-17

    申请号:US10451743

    申请日:2002-01-07

    IPC分类号: C08F6/06

    摘要: A process for the preparation of highly reactive polyisobutenes is described, in which isobutene is polymerized in the presence of a complex of boron trifluoride and at least one cocatalyst in a liquid organic phase at a reaction temperature of from −60 to −4° C. and water is added in two stages to the organic phase for catalyst deactivation and catalyst extraction.

    摘要翻译: 描述了制备高反应性聚异丁烯的方法,其中异丁烯在-60至-4℃的反应温度下在液态有机相中在三氟化硼与至少一种助催化剂的配合物存在下聚合。 并将水分两步加入到有机相中用于催化剂失活和催化剂萃取。