Process for removing pure aromatics
    1.
    发明授权
    Process for removing pure aromatics 失效
    去除纯粹的芳香物质的方法

    公开(公告)号:US5059306A

    公开(公告)日:1991-10-22

    申请号:US541555

    申请日:1990-06-21

    CPC分类号: C07C7/14875

    摘要: In the removal of pure aromatics from aromatic-containing hydrocarbon mixtures by liquid-phase extraction or extractive distillation using a selective solvent, the specific cost of separation can be reduced at the same yield of aromatics or the yield of aromatics can be increased at the same specific cost of separation if the liquid-phase extraction or the extractive distillation is carried out in the presence of a reactive solid. At the same time, substantially aromatic-free raffinates are obtained.

    摘要翻译: 在通过使用选择性溶剂的液相萃取或萃取蒸馏从含芳烃的烃混合物中除去纯芳烃时,可以以相同的芳族化合物产率降低分离的具体成本,或者相同的芳族化合物的产率可以提高 如果在反应性固体的存在下进行液相萃取或萃取蒸馏,则具体的分离成本。 同时,获得基本上无芳香族的残余物。

    Process for the preparation of pure tert.-olefins
    2.
    发明授权
    Process for the preparation of pure tert.-olefins 失效
    制备纯叔烯烃的方法

    公开(公告)号:US4409421A

    公开(公告)日:1983-10-11

    申请号:US385225

    申请日:1982-06-04

    摘要: Pure tert.-olefins are prepared from mixtures of hydrocarbons, which contain at least one such tert.-olefin, by reaction with an alkanol to give the corresponding alkyl tert.-alkyl ethers, and subsequent cleavage of these ethers back to the corresponding pure tert.-olefins and the alkanol, and the separation of the pure tert.-olefin from the alkanol. For this, the alkanol present after the cleavage of the ether is separated from the tert.-olefin to the extent of 60 to 99% by weight by distillation, and the residual amount of alcohol in the olefin fraction is removed by adsorption from this fraction onto a synthetic ion exchanger as an absorber resin. The admixture of the alkanol to the mixture of hydrocarbons with at least one tert.-olefin is carried out partly by using the alkanol fraction arising from the separating off of the pure tert.-olefin, and partly by desorption of the alkanol from the absorber resin with the aid of the mixture of hydrocarbons containing at least 1 tert.-olefin.

    摘要翻译: 纯的叔烯烃由含有至少一种这样的叔烯烃的烃的混合物通过与烷醇反应得到相应的烷基叔烷基醚,随后将这些醚分解回到相应的纯 - 叔烯烃和链烷醇,以及从链烷醇中分离出纯的叔烯烃。 为此,通过蒸馏将醚裂解后存在的链烷醇与叔烯烃分离至60至99重量%,通过从该馏分中吸附除去烯烃馏分中的醇的残留量 作为吸收树脂的合成离子交换剂。 烷烃与烃与至少一种叔烯烃的混合物的混合物部分地通过使用由纯的叔烯烃分离产生的烷醇馏分部分地进行,部分地通过链烷醇从吸收塔中的解吸 借助于含有至少1个叔烯烃的烃的混合物来提供树脂。

    Process for the production of polyisocyanates
    5.
    发明授权
    Process for the production of polyisocyanates 失效
    多异氰酸酯的制备方法

    公开(公告)号:US4745216A

    公开(公告)日:1988-05-17

    申请号:US715716

    申请日:1985-03-25

    CPC分类号: C07C263/10 C07C263/20

    摘要: Polyisocyanates are produced by reacting a polyamide solution with a phosgene solution. After the product polyisocyanate has been recovered, the solvent or a portion of the solvent employed is treated with crosslinked polymers insoluble in the solvent which polymers contain primary and/or secondary alcoholic hydroxyl groups and/or primary and/or secondary amino groups. After treatment, the polymer and any reaction products are removed. The solvent may then be reused. Preferred solvents are chlorobenzene and o-dichlorobenzene. The preferred polymers are bead polymers or bead copolymers of (meth)acrylic acid or styrene/divinyl benzene copolymer.

    摘要翻译: 聚异氰酸酯通过聚酰胺溶液与光气溶液反应制备。 在产物多异氰酸酯已被回收之后,溶剂或所用溶剂的一部分用不溶于溶剂的交联聚合物处理,该聚合物含有伯和/或仲醇羟基和/或伯和/或仲氨基。 处理后,除去聚合物和任何反应产物。 然后可以重新使用溶剂。 优选的溶剂是氯苯和邻二氯苯。 优选的聚合物是(甲基)丙烯酸或苯乙烯/二乙烯基苯共聚物的珠粒聚合物或珠粒共聚物。

    Process for recovering gallium
    9.
    发明授权
    Process for recovering gallium 失效
    回收镓的方法

    公开(公告)号:US4943420A

    公开(公告)日:1990-07-24

    申请号:US337585

    申请日:1989-04-13

    IPC分类号: C22B58/00 C01G15/00

    摘要: In the process for recovering gallium from aqueous, alkaline solutions by adsorption of the gallium on to bead-polymerized synthetic resins impregnated with 8-hydroxyquinolines and elution thereof with aqueous acids, the synthetic resins employed according to the invention are macroporous polydivinylbenzene or macroporous divinylbenzene copolymers which have been obtained by bead polymerization of divinylbenzene or mixtures of aromatic mono-, di- and/or trivinylbenzenes containing at least 50% by weight of divinylbenzene, in the presence of methyl isobutyl ketone, and which have been loaded with 160-190 g of Kelex 100 per liter of resin; in addition the resin is washed with sodium hydroxide solution after the elution step and before the commencement of each individual service cycle.

    摘要翻译: 在通过将镓吸附到用8-羟基喹啉浸渍的珠光聚合的合成树脂上并用含水酸洗脱的水性碱性溶液中回收镓的方法中,根据本发明使用的合成树脂是大孔聚二乙烯基苯或大孔二乙烯基苯共聚物 其通过二甲基苯的珠聚合或含有至少50重量%的二乙烯基苯的芳族单,二和/或三乙烯苯的混合物在甲基异丁基酮的存在下获得,并且已经装载了160-190g 的Kelex 100每升树脂; 此外,在洗脱步骤之后和在每个单独的使用周期开始之前,用氢氧化钠溶液洗涤树脂。