Stabilized (poly)ester/(poly)carbonate blend
    51.
    发明授权
    Stabilized (poly)ester/(poly)carbonate blend 失效
    稳定(聚)酯/(聚)碳酸酯混合物

    公开(公告)号:US4560722A

    公开(公告)日:1985-12-24

    申请号:US644781

    申请日:1984-08-27

    申请人: John A. Tyrell

    发明人: John A. Tyrell

    CPC分类号: C08K3/38 C08L67/02 C08L69/00

    摘要: Compositions comprising a diester or polyester, e.g., 1,4-butylene dibenzoate or poly(1,4-butylene terephthalate) in combination with an organic carbonate or polycarbonate, e.g., diphenyl carbonate or poly(bisphenol-A carbonate), are stabilized with boric acid.

    摘要翻译: 包含二酯或聚酯的组合物,例如1,4-丁烯二苯甲酸酯或与有机碳酸酯或聚碳酸酯结合的聚(1,4-丁二醇对苯二甲酸酯),例如碳酸二苯酯或聚(双酚A碳酸酯),用 硼酸。

    Preparation of pure dimethyl carbonate
    52.
    发明授权
    Preparation of pure dimethyl carbonate 失效
    纯碳酸二甲酯的制备

    公开(公告)号:US4162200A

    公开(公告)日:1979-07-24

    申请号:US871547

    申请日:1978-01-23

    CPC分类号: C07C68/065 C07C68/08

    摘要: Dimethyl carbonate is obtained pure, from its solutions in methanol, by extractive distillation carried out with a temperature of from 60.degree. C. at the top to 250.degree. C. at the bottom of the column and employing, as the extractant, an aprotic organic liquid which is substantially inert toward dimethyl carbonate, boils at above 100.degree. C. at standard pressure, is miscible with dimethyl carbonate in all proportions and has a dielectric constant .epsilon. of from 4 to 90 and a dipole moment .mu. of from 1.5 to 5 Debye.

    摘要翻译: 碳酸二甲酯从其甲醇溶液中通过萃取蒸馏得到,温度为60℃,塔顶至250℃,采用萃取剂为非质子有机物 对碳酸二甲酯基本上是惰性的液体在标准压力下在高于100℃下沸腾,与所有比例的碳酸二甲酯混溶,并且介电常数ε为4-90,偶极矩μ为1.5至5德拜 。

    Process and equipment for solvent extraction
    53.
    发明授权
    Process and equipment for solvent extraction 失效
    溶剂萃取的工艺和设备

    公开(公告)号:US3936489A

    公开(公告)日:1976-02-03

    申请号:US306059

    申请日:1972-11-13

    IPC分类号: B01D11/04 C07C51/48 C07C68/08

    CPC分类号: B01D11/0449

    摘要: Process for the solvent extraction of liquids mutually immiscible with each other and having different specific gravity, in which both the mother liquor and the solvent(s) are dispersed in a gas or vapour, thereafter the disperse state of the system is terminated by condensation, and the immiscible phases are separated from each other.

    摘要翻译: 溶剂萃取相互不混溶并具有不同比重的液体的溶剂萃取方法,其中母液和溶剂都分散在气体或蒸气中,此后系统的分散状态通过冷凝终止, 并且不混溶相彼此分离。

    Purification of oxygenated organic compounds
    54.
    发明授权
    Purification of oxygenated organic compounds 失效
    氧化有机化合物的纯化

    公开(公告)号:US3846450A

    公开(公告)日:1974-11-05

    申请号:US28780172

    申请日:1972-09-08

    申请人: DOW CHEMICAL CO

    发明人: STALKER G PEARCE R

    摘要: A method to remove impurities from the oxygenated organic compounds methylphenol ether, diethylcarbonate, butyrolactone and 4-methyl-1,3-dioxolan-2-one by selectively complexing the impurity with a halide of an alkaline earth metal and then removing the so-complexed impurity from the oxygenated compound.

    摘要翻译: 通过选择性地使杂质与碱土金属的卤化物络合,然后除去如此复合的杂质,从含氧有机化合物甲基酚醚,二乙基碳酸酯,丁内酯和4-甲基-1,3-二氧戊环-2-酮中除去杂质的方法 来自含氧化合物的杂质。