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    • 162. 发明授权
    • Purification of acetic acid from wood acetylation process using extraction
    • 使用提取从木材乙酰化工艺中纯化乙酸
    • US08168824B2
    • 2012-05-01
    • US12806349
    • 2010-08-11
    • R. Jay WarnerMelchior A. Meilchen
    • R. Jay WarnerMelchior A. Meilchen
    • C07C51/42
    • C07C51/48C07C53/08
    • There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid:water of at least 1:1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.
    • 显示了一种纯化含有萜烯和萜类杂质的冰醋酸的方法。 将含有萜烯和萜类杂质的基本干燥的乙酸与水和与乙酸和水基本上不混溶的合适的有机溶剂结合形成分离复合萃取介质,其重量比为乙酸:水至少为1: 1。 将组分分离成有机相和酸性水相,萜烯和萜类杂质浓缩在有机相中,并且酸水相含有纯化的萜烯和萜类杂质。 回收纯化的含水酸相,干燥纯化的乙酸。
    • 163. 发明授权
    • Acetic anhydride and acetate ester co-production
    • 乙酸酐和醋酸酯共同生产
    • US07199263B2
    • 2007-04-03
    • US10920688
    • 2004-08-18
    • R. Jay Warner
    • R. Jay Warner
    • C07C67/08C07C51/54
    • C07C51/56C07C45/89C07C67/08C07C49/88C07C53/12C07C69/14
    • A method of co-producing acetic anhydride and an acetate ester includes pyrolizing acetic acid at elevated temperature to produce a first ketene stream, the first ketene stream being a vapor phase stream comprising ketene, acetic acid and water; cooling the first ketene stream to condense acetic acid and water therefrom, thereby generating (i) a weak acid aqueous stream and (ii) a ketene feed stream; feeding the ketene feed stream to an acetic anhydride reactor where the ketene is reacted with acetic acid to produce acetic anhydride; concurrently with step (c), feeding the weak acid aqueous stream to an esterification reactor wherein acetic acid in the weak acid stream is reacted with an organic alcohol to produce an acetate ester. Preferably, the organic alcohol is selected from organic alcohols which (i) form acetate esters which esters and optionally alcohols provide azeotropic mixtures with water and (ii) wherein the azeotropic mixtures have a water content greater than the amount of water generated by reaction of the alcohol with acetic acid to facilitate azeotropically separating the acetate ester from the reaction mixture.
    • 共生产乙酸酐和乙酸酯的方法包括在升高的温度下热解乙酸以产生第一乙烯酮流,第一乙烯酮流是包含乙烯酮,乙酸和水的气相物流; 冷却第一个乙烯酮流以从其中冷凝乙酸和水,从而产生(i)弱酸水流和(ii)乙烯酮进料流; 将乙烯酮进料流进料到乙酸酐反应器中,其中乙烯酮与乙酸反应生成乙酸酐; 与步骤(c)同时,将弱酸性水流进料到酯化反应器中,其中弱酸流中的乙酸与有机醇反应以产生乙酸酯。 优选地,有机醇选自(i)形成乙酸酯的有机醇,其酯和任选的醇与水提供共沸混合物,和(ii)其中共沸混合物的水含量大于通过反应产生的水的量 乙醇与乙酸共沸以促进乙酸酯与反应混合物的共沸分离。
    • 165. 发明授权
    • Continuous process for the production of carboxylic acid esters of alkylene glycol monoalkyl ethers
    • 用于生产亚烷基二醇单烷基醚的羧酸酯的连续方法
    • US06444842B1
    • 2002-09-03
    • US09529899
    • 2000-04-19
    • H. Robert GerberichR. Jay Warner
    • H. Robert GerberichR. Jay Warner
    • C07C6702
    • C07C67/54C07C67/58C07C69/003C07C69/14
    • The present invention provides an improved method for the preparation of carboxylic acid esters of alkylene glycol monoalkyl ethers by the acid catalyzed esterification of the monoalkyl ether with a carboxylic acid. In a preferred embodiment of the invention, the carboxylic acid and alcohol are reacted in a reactor/column and the resulting ester product is distilled into an overhead decanter/extractor as a single phase. A small amount of solvent, preferably a hydrocarbon is added to the mixture causing the resulting distillate to separate into two phases, one phase containing the desired product, the other containing primarily water. The process described is applicable to both batch and continuous operation and is not constrained by the difficulty of separating closely boiling azeotropes and results in substantially higher production rates than achieved by current processes.
    • 本发明提供了通过单烷基醚与羧酸的酸催化酯化来制备亚烷基二醇单烷基醚的羧酸酯的改进方法。 在本发明的优选实施方案中,羧酸和醇在反应器/塔中反应,所得酯产物作为单相蒸馏成塔顶馏分/萃取器。 向混合物中加入少量溶剂,优选烃,使所得馏出物分离成两相,一相含有所需产物,另一相主要含水。 所描述的方法适用于批次和连续操作,并且不受分离紧密沸腾的共沸物的困难的限制,并且导致比通过当前方法实现的生产率显着更高的生产率。