CONTROL OF IODIDES IN ACETIC ACID PRODUCTION

    公开(公告)号:US20240279144A1

    公开(公告)日:2024-08-22

    申请号:US18436505

    申请日:2024-02-08

    CPC classification number: C07C29/44 C07C29/94

    Abstract: A process for producing and recovering acetic acid in an acetic acid production system is disclosed, the process comprising contacting methanol and carbon monoxide in the presence of a liquid reaction medium comprising iodide under carbonylation conditions sufficient to form acetic acid. The liquid reaction medium comprises a carbonylation catalyst, water, and an additive comprising a bidentate phosphine dioxide, a tertiary arsine oxide, or a combination thereof. An aspect of the process includes a method for reducing water in an acetic acid production process.

    A METHOD OF PURIFYING RAW METHANOL
    4.
    发明公开

    公开(公告)号:US20230265031A1

    公开(公告)日:2023-08-24

    申请号:US18014128

    申请日:2021-06-17

    Applicant: ANDRITZ OY

    Inventor: Johan OLSSON

    CPC classification number: C07C29/80 C07C29/94

    Abstract: A method of purifying raw methanol obtained in chemical pulping, wherein heavy oil is admixed with the raw methanol to prevent precipitation, and the methanol mixture is distilled or evaporated to recover the methanol. The heavy oil is formed by mixing and heating raw methanol obtained from a side stream of chemical hardwood pulping with an acidic aqueous solution to vaporize low boiling point sulfurous compounds and provide acidified raw methanol. The acidified raw methanol is separated into a liquid top phase, a liquid aqueous middle phase, and a liquid bottom phase. The liquid bottom phase is extracted to obtain the heavy oil.

    System and Method For PH Control Of Lean MEG Product From MEG Regeneration and Reclamation Packages
    6.
    发明申请
    System and Method For PH Control Of Lean MEG Product From MEG Regeneration and Reclamation Packages 有权
    MEG再生和回收包精益MEG产品PH控制系统与方法

    公开(公告)号:US20160101403A1

    公开(公告)日:2016-04-14

    申请号:US14973443

    申请日:2015-12-17

    Abstract: A lean MEG stream having a first pH level is contacted with a CO2-rich gas stream to yield a lean MEG product having a second different and lower pH level preferably in a range of 6.5 to 7.0. The system and method can be readily incorporated into a slipstream MEG recovery package, with a source of the lean MEG stream being a MEG regeneration section of the package. The CO2-rich gas could be a vented CO2 stream from the MEG reclamation section of the package. Unlike hydrochloric and acetic acid overdosing, CO2 overdosing of the lean MEG stream does not lead to rapid acidification of the lean MEG product to be stored or injected.

    Abstract translation: 将具有第一pH值的贫MEG流与富含CO 2的气流接触以产生具有第二不同和较低pH值的贫MEG产物,优选在6.5至7.0的范围内。 该系统和方法可以容易地并入到滑流MEG回收包中,其中瘦MEG流的源是包装的MEG再生部分。 富含二氧化碳的气体可以是来自包装的MEG回收部分的排出的CO 2流。 与过量的盐酸和乙酸不同,稀释的MEG流过量的CO 2不会导致要被储存或注入的瘦MEG产物的快速酸化。

    1,2-ALKANE POLYOL-CONTAINING COMPOSITION
    7.
    发明申请
    1,2-ALKANE POLYOL-CONTAINING COMPOSITION 有权
    含1,2-亚烷基多元醇的组合物

    公开(公告)号:US20160045414A1

    公开(公告)日:2016-02-18

    申请号:US14879472

    申请日:2015-10-09

    Abstract: Provided is a composition containing, as an alkane polyol, a C4-18 1,2-alkane polyol in which the degradation over time of the C4-18 1,2-alkane polyol, which has inferior chemical stability and degrades easily, is suppressed, the composition being suitable for use in a cosmetic, an inkjet ink, a fiber or a coating material such as a paint. A composition containing 1,2-alkane polyol that can be used in a cosmetic, an inkjet ink, a raw material for fibers or a coating material, the alkane polyol being a C4-18 1,2-alkane polyol, and the composition containing a radical scavenger.

    Abstract translation: 本发明提供一种组合物,其含有作为烷烃多元醇的C4-18 1,2-烷烃多元醇,其中化学稳定性差并易于降解的C4-18 1,2-烷烃多元醇随时间的劣化被抑制 ,该组合物适用于化妆品,喷墨油墨,纤维或涂料等涂料。 可用于化妆品,喷墨油墨,纤维原料或涂料的1,2-烷烃多元醇的组合物,所述烷烃多元醇为C 4-18 1,2-链烷烃多元醇,所述组合物含有 一个激进的清道夫。

    METHOD FOR PREPARING HIGH-PURITY ANHYDROSUGAR ALCOHOL HAVING IMPROVED YIELD BY USING WASTE FROM CRYSTALLIZATION STEP
    8.
    发明申请
    METHOD FOR PREPARING HIGH-PURITY ANHYDROSUGAR ALCOHOL HAVING IMPROVED YIELD BY USING WASTE FROM CRYSTALLIZATION STEP 有权
    通过使用废水从结晶步骤制备具有改进的高熔点的高纯度无定形醇的方法

    公开(公告)号:US20150252054A1

    公开(公告)日:2015-09-10

    申请号:US14441444

    申请日:2013-11-06

    Abstract: The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, then distilling the converted liquid, and crystallizing the distilled liquid in a solvent, the technique removing a crystallization solvent from a crystallization mother liquor generated during a crystallization step and then introducing the resultant product together with the distilled liquid and the converted liquid into a distillation step, thereby being capable of improving the total distillation yield of the anhydrosugar alcohol, improving distillation efficiency by improving the mobility of a distillate, and further reducing the amount of generated waste and treatment costs and thus highly efficiently preparing the high-purity anhydrosugar alcohol at reduced costs.

    Abstract translation: 本发明涉及一种使用氢化糖作为原料制备脱水葡萄糖醇的技术,更具体地说,涉及通过向氢化糖(例如己糖醇)中加入酸来转化而制备高纯度脱水糖醇的技术 与脱水葡萄糖醇相同,然后蒸馏转化的液体,并将溶剂中的蒸馏液结晶,该技术从结晶步骤中产生的结晶母液中除去结晶溶剂,然后将所得产物与蒸馏液和 从而能够提高脱水葡萄糖的总蒸馏收率,通过提高馏出物的流动性来提高蒸馏效率,进一步减少产生的废弃物和处理成本,从而高效地制备高产率 纯度不溶性葡萄糖醇,降低成本。

    Alcohol fractionation
    9.
    发明授权
    Alcohol fractionation 有权
    酒精分馏

    公开(公告)号:US08273927B2

    公开(公告)日:2012-09-25

    申请号:US12858566

    申请日:2010-08-18

    Inventor: John E. Stauffer

    CPC classification number: C07C29/94 C07C29/86 C07C31/08 C07C31/10 C07C31/12

    Abstract: A process is provided for the recovery of alcohol from its aqueous solution by dissolving caustic in the solution to generate a phase separation. One layer contains the alcohol product and the other layer waste water. By recovering and recycling the caustic, a self-contained process is realized.

    Abstract translation: 提供了通过将苛性碱溶解在溶液中以产生相分离从其水溶液中回收醇的方法。 一层含有酒精产品和其他层废水。 通过回收和回收苛性碱,实现了一个独立的过程。

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