Process for the preparation of 1,3-dichloropropane
    1.
    发明授权
    Process for the preparation of 1,3-dichloropropane 失效
    1,3-二氯丙烷的制备方法

    公开(公告)号:US06423189B1

    公开(公告)日:2002-07-23

    申请号:US09580562

    申请日:2000-05-30

    申请人: Manfred Kaufhold

    发明人: Manfred Kaufhold

    IPC分类号: B01D300

    摘要: A process for the preparation of 1,3-dichloropropane by reacting bis(3-hydroxypropyl)ether with hydrogen chloride, optionally in the presence of tertiary basic nitrogen compounds or other tertiary aliphatic bases as catalysts, distilling off the 1,3-dichloropropane and the water of reaction and working up the two phases.

    摘要翻译: 一种通过使双(3-羟丙基)醚与氯化氢反应制备1,3-二氯丙烷的方法,任选在叔碱式氮化合物或其它叔脂族基团作为催化剂的存在下,蒸除1,3-二氯丙烷和 反应的水和两个阶段的工作。

    Process for preparing cyclopropyl alkyl ketones and
4,5-dihydroalkylfurans
    2.
    发明授权
    Process for preparing cyclopropyl alkyl ketones and 4,5-dihydroalkylfurans 失效
    制备环丙基烷基酮和4,5-二氢烷基呋喃的方法

    公开(公告)号:US5629455A

    公开(公告)日:1997-05-13

    申请号:US589952

    申请日:1996-01-23

    CPC分类号: C07D307/28 C07C45/676

    摘要: The invention relates to a novel process for the simultaneous preparation of cyclopropyl alkyl ketones and 4,5-dihydroalkylfurans from 3-acyltetrahydrofuran-2-ones using a metal salt according to the diagram ##STR1## In the reaction, N-alkyllactams and/or N-acylmorpholines which are high-boiling and only slightly miscible with water are used. By charging the solvent, the metal salt and the 3-acyltetrahydrofuran-2-one in a molar excess with respect to the metal salt, heating the mixture to 160.degree. to 220.degree. C. and metering in further 3-acyl-tetrahydrofuran-2-one, the desired products are obtained in high yields. The metal salt can moreover be recovered in a simple manner by washing with water.

    摘要翻译: 本发明涉及一种根据图中使用金属盐从3-酰基四氢呋喃-2-酮同时制备环丙基烷基酮和4,5-二氢烷基呋喃的新方法。在反应中,N - 烷基内酰胺和/或N-酰基吗啉,它们是高沸点且仅与水轻微混溶。 通过将溶剂,金属盐和3-酰基四氢呋喃-2-酮相对于金属盐摩尔过量地加入,将混合物加热至160℃至220℃,并进一步计量3-酰基 - 四氢呋喃-2 - 一种,以高产率获得所需的产物。 此外,金属盐可以通过用水洗涤以简单的方式回收。

    Method of manufacturing chlorine-free cyclopropanecarboxylic acid methyl
ester
    4.
    发明授权
    Method of manufacturing chlorine-free cyclopropanecarboxylic acid methyl ester 失效
    无氯环丙烷甲酸甲酯的制备方法

    公开(公告)号:US5371270A

    公开(公告)日:1994-12-06

    申请号:US59319

    申请日:1993-05-11

    CPC分类号: C07C67/317

    摘要: A method of manufacturing chlorine-free cyclopropanecarboxylic acid methyl ester is described wherein a first portion of alkali methoxide is added to a high-boiling solvent, followed by a second portion of methoxide with an equimolar portion of 4-chlorobutyric acid. The ester product can be readily hydrogenated catalytically to the corresponding carbinol.

    摘要翻译: 描述了制备无氯环丙烷甲酸甲酯的方法,其中将第一部分碱金属甲醇加入到高沸点溶剂中,然后加入第二部分甲醇与等摩尔份的4-氯丁酸。 酯产物可以容易地氢化成相应的甲醇。

    Process for the production of technically pure, chlorine-free
cyclohexadecadiene
    5.
    发明授权
    Process for the production of technically pure, chlorine-free cyclohexadecadiene 失效
    用于生产技术上纯的无氯环己烷的方法

    公开(公告)号:US4772758A

    公开(公告)日:1988-09-20

    申请号:US37891

    申请日:1987-04-13

    申请人: Manfred Kaufhold

    发明人: Manfred Kaufhold

    CPC分类号: C07C13/02 C07C7/14875

    摘要: A process for producing technically pure, chlorine-free cyclohexadecadiene by purifying the product mixture obtained preferably from the metathesis of cyclooctene by first removing by distillation the low boiling C.sub.6 hydrocarbons and any water that may be present, then treating the sump product with a solution of a strongly alkaline compound at about 100.degree.-250.degree. C. After separation of the thus-formed salts, the thus-pretreated product mixture may be subjected to fractional distillation in the usual way.

    摘要翻译: 通过首先通过蒸馏除去低沸点C 6烃和可能存在的任何水来纯化优选从环辛烯的复分解得到的产物混合物来生产技术上纯的无氯环己烷的方法,然后用溶液 在约100-250℃下是强碱性化合物。在分离如此形成的盐之后,如此预处理的产物混合物可以以常规方式进行分馏。

    Process for the recovery of pure methylal from methanol-methylal mixtures
    6.
    发明授权
    Process for the recovery of pure methylal from methanol-methylal mixtures 失效
    从甲醇 - 甲缩醛混合物中回收纯甲缩醛的方法

    公开(公告)号:US4385965A

    公开(公告)日:1983-05-31

    申请号:US342975

    申请日:1982-01-26

    CPC分类号: C07C41/58

    摘要: In a process for recovering pure methylal from methanol-methylal mixtures, which can optionally contain still further compounds, the separation conducted in a rectification device comprising two rectifying columns. In the first rectifying column, the mixture to be separated is rectified under a pressure lower than that in the second column, into a methylal-rich, methanol-poor distillate, and into a practically methylal-free, methanol-rich sump product. The methylal-rich distillate of the first rectification is then separated in a second rectifying column, operated under a higher pressure than the first rectification column, into a compound stream containing methanol and methylal, which is then recycled to the first rectifying column, and into pure methylal as the sump product. In a specific refinement, the first rectification is preferably operated under a pressure of 1-22 bar absolute and the second rectification preferably under a pressure of 9-30 bar absolute, with the second rectification being operated under a pressure which is at least 8 bar higher than that of the first rectification.

    摘要翻译: 在从可以任选地含有其它化合物的甲醇 - 甲缩醛混合物中回收纯甲缩醛的方法中,在包括两个精馏塔的精馏装置中进行分离。 在第一精馏塔中,将待分离的混合物在低于第二塔的压力下进行精馏,成为富含甲缩醛的不饱和甲醇的馏出物,并进入实际上无甲醛的富含甲醇的油槽产物。 然后将第一精馏的甲缩醛馏出物在比第一精馏塔高的压力下操作的第二精馏塔中分离成含有甲醇和甲缩醛的复合物流,然后将其再循环至第一精馏塔,并进入 纯甲缩醛作为贮槽产品。 在特定的改进中,第一精馏优选在1-22巴绝对压力下操作,优选在9-30巴绝对压力下进行第二次精馏,第二次精馏在至少8巴的压力下操作 高于首次整改。

    Process for preparing cyclopropanecarboxylates of lower alcohols
    7.
    发明授权
    Process for preparing cyclopropanecarboxylates of lower alcohols 失效
    制备低级醇的环丙烷羧酸酯的方法

    公开(公告)号:US06730804B1

    公开(公告)日:2004-05-04

    申请号:US09141163

    申请日:1998-08-27

    IPC分类号: C07C6974

    CPC分类号: C07C67/08 C07C69/74

    摘要: Cyclopropanecarboxylates of lower alcohols are prepared by esterification of the corresponding cyclopropanecarboxylic acids with the corresponding lower alcohols in the presence of an acid catalyst, while maintaining a considerable stoichiometric excess of the cyclopropanecarboxylic acid with respect to the lower alcohol, keeping the temperature at from 100 to 200° C. and distilling off the cyclopropanecarboxylate together with the water of reaction and small amounts of alcohol. Cyclopropanecarboxylates of lower alcohols are valuable intermediates in the pharmaceutical and agrochemical sectors.

    摘要翻译: 低级醇的环丙烷羧酸酯通过相应的环丙烷羧酸与相应的低级醇在酸催化剂存在下酯化而制备,同时相对于低级醇维持相当大的化学计量过量的环丙烷羧酸,保持温度为100至 200℃,并与反应水和少量酒精一起蒸馏出环丙烷羧酸酯。 低级醇的环丙烷羧酸盐是制药和农业部门的有价值的中间体。

    Method for the continuous production of esters of thermally unstable
acids
    8.
    发明授权
    Method for the continuous production of esters of thermally unstable acids 失效
    连续生产热不稳定酸酯的方法

    公开(公告)号:US5902895A

    公开(公告)日:1999-05-11

    申请号:US851070

    申请日:1997-05-05

    申请人: Manfred Kaufhold

    发明人: Manfred Kaufhold

    CPC分类号: C07C67/08

    摘要: A method for the continuous production of esters of thermally unstable acids by the esterification, with or without a catalyst, of the acids with alcohols is provided. The method involves esterification at temperatures of approximately 80.degree. C. to approximately 130.degree. C., essentially in a single reaction zone, to which the acid and an excess of alcohol are continuously supplied and from which a vapor stream containing alcohol and water produced by the esterification reaction are removed, while at the same time removing an ester-rich liquid reaction mixture from the single reaction zone, from which the ester is obtained.

    摘要翻译: 提供了一种用醇连续生产不稳定酸的酯的方法,该方法是用醇与酸进行酯化反应。 该方法包括在约80℃至约130℃的温度下酯化,基本上在单个反应区中,向其中连续供应酸和过量的醇,并从其中由含有醇和水的蒸气流由 除去酯化反应,同时从单一反应区除去富含酯的液体反应混合物,从中获得酯。

    Process for preparing 4-acylamino-2,2,6,6-tetramethylpiperidines
    9.
    发明授权
    Process for preparing 4-acylamino-2,2,6,6-tetramethylpiperidines 失效
    4-酰基氨基-2,2,6,6-四甲基哌啶的制备方法

    公开(公告)号:US5728836A

    公开(公告)日:1998-03-17

    申请号:US704863

    申请日:1996-08-30

    申请人: Manfred Kaufhold

    发明人: Manfred Kaufhold

    IPC分类号: C07D211/58 C07D211/98

    CPC分类号: C07D211/58

    摘要: Preparation of 4-acylamino-2,2,6,6-tetramethylpiperidines from 4-amino-2,2,6,6-tetramethylpiperidine and acid anhydrides carried out in the presence of carboxylic acids, whereupon the carboxylic acid is eliminated, using water at elevated temperature, from the initially formed carboxylate salt of the 4-acylamino-2,2,6,6-tetramethylpiperidine. In this process, no salt-like by-products arise.

    摘要翻译: 在羧酸存在下,由4-氨基-2,2,6,6-四甲基哌啶和酸酐制备4-酰氨基-2,2,6,6-四甲基哌啶,然后用水除去羧酸 在升高的温度下,从最初形成的4-酰氨基-2,2,6,6-四甲基哌啶的羧酸盐。 在这个过程中,不会产生盐类副产物。

    Process for the preparation of 5-chloro-2-pentanone
    10.
    发明授权
    Process for the preparation of 5-chloro-2-pentanone 失效
    5-氯-2-戊酮的制备方法

    公开(公告)号:US4990682A

    公开(公告)日:1991-02-05

    申请号:US439688

    申请日:1989-11-21

    CPC分类号: C07D317/20 C07C45/59

    摘要: A process for the preparation of 5-chloro-2-pentanone starting from a ketal of a levulinic ester, followed by hydrogenation, and then reaction with hydrochloric acid. The process involves first purifying the ketal of the levulinic ester by distillation, making the hydrogenation catalysts for the ketal alkaline, and reacting the 3-(2-methyl-1,3-dioxolan-2-yl)propan-1-ol formed in this hydrogenation with hydrochloric acid to obtain 5-chloro-2-pentanone.

    摘要翻译: 从乙酰丙酸酯的缩酮开始制备5-氯-2-戊酮,然后氢化,然后与盐酸反应的方法。 该方法首先通过蒸馏纯化乙酰丙酸酯的缩酮,制备用于缩酮的氢化催化剂为碱性物质,并使3-(2-甲基-1,3-二氧戊环-2-基)丙-1-醇 用盐酸进行氢化,得到5-氯-2-戊酮。