Method for preparing a heteropolyacid catalyst from basic solvent treatments and method for preparing methacrylic acid using thererof
    91.
    发明授权
    Method for preparing a heteropolyacid catalyst from basic solvent treatments and method for preparing methacrylic acid using thererof 失效
    从碱性溶剂处理制备杂多酸催化剂的方法和使用该方法制备甲基丙烯酸的方法

    公开(公告)号:US07045482B2

    公开(公告)日:2006-05-16

    申请号:US10452220

    申请日:2003-06-03

    摘要: The present invention relates to a method for preparing a heteropolyacid catalyst and method for preparing methacrylic acid using thereof. More particularly, the present invention relates to a method for preparing heteropolyacid catalyst, which is produced by the recrystallization of a heteropolyacid and/or its salt dissolved in a basic organic solvent and heat-treatment, and further to a method for preparing metachrylic acid using thereof, wherein the use of the heteropolyacid catalyst increases the activity of oxidation reaction induced by the modified electronic properties of heteropolyanions and provides high efficiency production of methacrylic acid from methacrolein, since the basic property of solvent inhibits peculiar acidic property of heteropolyacid.

    摘要翻译: 本发明涉及一种制备杂多酸催化剂的方法及其制备方法。 更具体地说,本发明涉及一种制备杂多酸催化剂的方法,该方法是通过将杂多酸和/或其盐溶解在碱性有机溶剂中进行重结晶并进行热处理制备的,进一步涉及一种使用 其中杂多酸催化剂的使用增加了由杂多阴离子改性的电子性质引起的氧化反应的活性,并由甲基丙烯醛高效生产甲基丙烯酸,因为溶剂的碱性可以抑制杂多酸的特殊酸性。

    Fixed bed hydroprocessing methods and systems and methods for upgrading an existing fixed bed system
    92.
    发明申请
    Fixed bed hydroprocessing methods and systems and methods for upgrading an existing fixed bed system 有权
    固定床加氢处理方法及升级现有固定床系统的系统和方法

    公开(公告)号:US20050241992A1

    公开(公告)日:2005-11-03

    申请号:US11117203

    申请日:2005-04-28

    摘要: A fixed bed hydroprocessing system, and also a method for upgrading a pre-existing fixed bed hydroprocessing system, involves preliminarily upgrading a heavy oil feedstock in one or more slurry phase reactors using a colloidal or molecular catalyst and then further hydroprocessing the upgraded feedstock within one or more fixed bed reactors using a porous supported catalyst. The colloidal or molecular catalyst is formed by intimately mixing a catalyst precursor composition into a heavy oil feedstock and raising the temperature of the feedstock to above the decomposition temperature of the precursor composition to form the colloidal or molecular catalyst in situ. Asphaltene or other hydrocarbon molecules otherwise too large to diffuse into the pores of the fixed bed catalyst can be upgraded by the colloidal or molecular catalyst. One or more slurry phase reactors may be built and positioned upstream from one or more fixed bed reactors of a pre-existing fixed bed system and/or converted from one or more pre-existing fixed bed reactors.

    摘要翻译: 固定床加氢处理系统以及升级预先存在的固定床加氢处理系统的方法包括使用胶体或分子催化剂对一个或多个淤浆相反应器中的重油原料进行初步升级,然后将升级的原料进一步加氢处理 或更多的固定床反应器。 胶体或分子催化剂通过将催化剂前体组合物紧密地混合到重油原料中并将原料的温度升高到高于前体组合物的分解温度以形成原位形成胶态或分子催化剂而形成。 否则通过胶体或分子催化剂可以提高沥青质或其它烃分子,否则太大而不能扩散到固定床催化剂的孔中。 一个或多个淤浆相反应器可以建立并定位在预先存在的固定床系统的一个或多个固定床反应器的上游和/或从一个或多个预先存在的固定床反应器转化。

    Process for regeneration of carbon-supported, rhenium-containing catalysts
    95.
    发明授权
    Process for regeneration of carbon-supported, rhenium-containing catalysts 失效
    含碳载体的含铼催化剂的再生方法

    公开(公告)号:US06225477B1

    公开(公告)日:2001-05-01

    申请号:US09018823

    申请日:1998-02-04

    IPC分类号: C07D30756

    CPC分类号: B01J23/92 B01J38/48 B01J38/68

    摘要: This invention relates to a method of improving the catalytic performance of palladium or ruthenium, rhenium-on-carbon hydrogenation catalysts operating in aqueous media where loss of soluble rhenium may result in rapid catalytic failure. A rhenium-containing hydrogenation catalyst comprised of rhenium on a support material is regenerated by first treating the catalyst with aqueous perrhenic acid or potassium perrhenate followed by treating the catalyst under reducing conditions at elevated temperature and pressure. Treatment of the catalyst as described replenishes dispersed fresh finely divided rhenium which enhances the activity of the catalyst while at the same time allowing the operations to be carried out in situ in the hydrogenation reactor or in a side stream reactor with significant savings in reducing reactor down time and precious metal expenses.

    摘要翻译: 本发明涉及一种提高钯或钌,碳酸氢铼催化剂在水介质中的催化性能的方法,其中可溶性铼的损失可导致快速催化失效。 通过首先用高铼酸水溶液或高铼酸钾处理催化剂,然后在还原条件下在升高的温度和压力下处理催化剂,再生由载体材料上的铼组成的含铼氢化催化剂。 如上所述处理催化剂补充分散的新鲜细分的铼,其增强了催化剂的活性,同时允许操作在氢化反应器或侧流反应器中原位进行,显着节省了减少反应器的下降 时间和贵金属费用。

    Regeneration of inactive and poisoned platinum catalysts
    100.
    发明授权
    Regeneration of inactive and poisoned platinum catalysts 失效
    无活性和中毒铂催化剂的再生

    公开(公告)号:US4659683A

    公开(公告)日:1987-04-21

    申请号:US835271

    申请日:1986-03-03

    摘要: Noble metal catalyst, in particular platinum catalysts, which are applied on carriers and have become poisoned by metals as a result of being used for many years in the preparation of hydroxyl-ammonium salts by catalytic reduction of nitric oxide with hydrogen in an aqueous mineral acid are regenerated by a process in which the metallic impurities are dissolved using nitric acid or aqua regia, the solution is neutralized, the troublesome metals are precipitated from the neutralized solution by means of a selective precipitating reagent, and the purified platinum solution is reused for the preparation of the catalyst. Organic complexing agents which form insoluble or sparingly soluble complexes with the metallic impurities are preferably used as precipitating reagents.

    摘要翻译: 贵金属催化剂,特别是铂催化剂,其被应用在载体上并且由于在无机酸水溶液中用氢催化还原一氧化氮,在多年的使用中被用来制备羟基铵盐而被金属中毒 通过使用硝酸或王水溶解金属杂质的方法再生,溶液中和,通过选择性沉淀试剂从中和溶液中沉淀出麻烦的金属,并将纯化的铂溶液重新用于 制备催化剂。 与金属杂质形成不溶性或微溶性络合物的有机络合剂优选用作析出试剂。