CAS: 4433-79-8; N-(4-Chloro-2,5-Dimethoxyphenyl)-3-Oxobutanamide

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CAS号91-94-1 3,3′-二氯联苯胺 | CAS号124236-34-6 2-[[2-chloro-4-...

双乙烯酮,4-氯-2,5-二甲氧基苯胺 以 乙醇 作为反应溶剂,化学反应 6.0H,以98.6%的收率获得产物乙酰乙酰-4-氯-2,5-二甲氧基苯胺
参考文献:一种4-氯-2,5-二甲氧基乙酰乙酰苯胺的制备 方法
标题:一种4-氯-2,5-二甲氧基乙酰乙酰苯胺的制备 方法
摘要:本发明涉及一种4‑氯‑2,5‑二甲氧基乙酰乙酰苯胺的制备方法,其实施过程如下:向反应容器中加入有机溶剂和4‑氯‑2,5‑二甲氧基苯胺,在温度10~100oc下,滴加双乙烯酮,约0.5~5小时加完,加毕,保温反应0.5~4小时,反应结束,冷却至0~10°C,放料压滤,结晶物即为4‑氯‑2,5‑二甲氧基乙酰乙酰苯胺,滤液循环套用.本发明方法所得产品质量好,且收率高,成本低,实现了废水零排放或微排放,符合绿色环保生产要求,操作简便,便于工业化.

专利信息

专利号:US-5389524-A
优先权日:1989-07-28
标 题:Method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium
发明人：LARSEN BJORN E H; VINTHER ARNE; MOLLER POUL; THORSSON JORN R; SOEBERG HENRIK; SORENSEN JESPER L; LARSEN LYKKE B
权利人:KOEGE KEMISK VAERK
摘要:PCT No. PCT/DK90/00196 Sec. 371 Date Mar. 24, 1992 Sec. 102(e) Date Mar. 24, 1992 PCT Filed Jul. 30, 1990 PCT Pub. No. WO91/02254 PCT Pub. Date Feb. 21, 1991.A method and apparatus for quantitatively monitoring a chemical component dissolved in a liquid medium utilize the creation, in a measurement cell, of an interface zone between the liquid medium and an analytical reagent or reference solution. The concentration or amount of the chemical component are determined by the measurement of a value of a measurement parameter in the interface zone, and the derivation from that value of the concentration or amount of the component in comparison with a baseline or reference value measured for the reagent or reference solution alone. Matrix effects and ghosting errors are avoided. The method and apparatus can be used advantageously for on-line optimization and control of industrial, chemical and biological processes, such as chemical reactions in progress, coupling reactions for the synthesis of azo compounds, and the monitoring of in vivo or in vitro biological systems as well as for conventional analytical purposes.