Process for the generation of .alpha., .beta.-unsaturated carboxylic
acids and esters using niobium catalyst
    2.
    发明授权
    Process for the generation of .alpha., .beta.-unsaturated carboxylic acids and esters using niobium catalyst 失效
    使用铌催化剂生成α,β-不饱和羧酸和酯的方法

    公开(公告)号:US5998657A

    公开(公告)日:1999-12-07

    申请号:US60468

    申请日:1998-04-15

    CPC分类号: C07C51/353 C07C67/343

    摘要: A process using a niobium catalyst includes the step of reacting an ester or carboxylic acid with oxygen and an alcohol in the presence a niobium catalyst to respectively produce an .alpha.,.beta.-unsaturated ester or carboxylic acid. Methanol may be used as the alcohol, and the ester or carboxylic acid may be passed over the niobium catalyst in a vapor stream containing oxygen and methanol. Alternatively, the process using a niobium catalyst may involve the step of reacting an ester and oxygen in the presence the niobium catalyst to produce an .alpha.,.beta.-unsaturated carboxylic acid. In this case the ester may be a methyl ester. In either case, niobium oxide may be used as the niobium catalyst with the niobium oxide being present on a support. The support may be an oxide selected from the group consisting of silicon oxide, aluminum oxide, titanium oxide and mixtures thereof. The catalyst may be formed by reacting niobium fluoride with the oxide serving as the support. The niobium catalyst may contain elemental niobium within the range of 1 wt % to 70 wt %, and more preferably within the range of 10 wt % to 30 wt %. The process may be operated at a temperature from 150 to 450.degree. C. and preferably from 250 to 350.degree. C. The process may be operated at a pressure from 0.1 to 15 atm. absolute and preferably from 0.5-5 atm. absolute. The flow rate of reactants may be from 10 to 10,000 L/kg.sub.(cat) /h, and preferably from 100 to 1,000 L/kg.sub.(cat) /h.

    摘要翻译: 使用铌催化剂的方法包括在铌催化剂存在下使酯或羧酸与氧和醇反应以分别产生α,β-不饱和酯或羧酸的步骤。 可以使用甲醇作为醇,并且酯或羧酸可以在含有氧和甲醇的蒸气流中通过铌催化剂。 或者,使用铌催化剂的方法可以包括在存在铌催化剂的情况下使酯和氧反应以产生α,β-不饱和羧酸的步骤。 在这种情况下,酯可以是甲酯。 在任一情况下,可以使用铌氧化物作为铌催化剂,其中铌氧化物存在于载体上。 载体可以是选自氧化硅,氧化铝,氧化钛及其混合物的氧化物。 催化剂可以通过使氟化铌与作为载体的氧化物反应而形成。 铌催化剂可以含有1重量%〜70重量%的范围内的元素铌,更优选在10重量%〜30重量%的范围内。 该方法可以在150至450℃,优选250至350℃的温度下操作。该方法可以在0.1至15atm的压力下操作。 绝对的,优选为0.5-5atm。 绝对。 反应物的流速可以为10〜10000L / kg(cat)/ h,优选为100〜1000L / kg(cat)/ h。

    Vapor phase carbonylation process using group 4 metal promoted iridium catalyst
    3.
    发明授权
    Vapor phase carbonylation process using group 4 metal promoted iridium catalyst 有权
    气相羰基化工艺使用第4族金属促进铱催化剂

    公开(公告)号:US06355837B1

    公开(公告)日:2002-03-12

    申请号:US09383124

    申请日:1999-08-25

    IPC分类号: C07C5112

    摘要: A method for producing esters and carboxylic acids from lower alkyl alcohols, ethers, esters and ester-alcohol reactant mixtures and includes the step of contacting a vaporous mixture of the reactants, carbon monoxide and a halide with a supported catalyst under vapor-phase carbonylation conditions. The catalyst includes iridium and a second metal selected from group 4 (titanium, zirconium, hafnium) metals of the periodic table of elements. Desirably, the iridium and secondary metal are deposited on activated carbon as a support material. In a preferred aspect of the invention, the vapor phase carbonylation process is useful for preparing acetic acid, methyl acetate or a mixture thereof.

    摘要翻译: 一种从低级烷基醇,醚,酯和酯 - 醇反应物混合物生产酯和羧酸的方法,包括在气相羰基化条件下使反应物,一氧化碳和卤化物的气态混合物与负载催化剂接触的步骤 。 催化剂包括铱和选自元素周期表第4族(钛,锆,铪)金属的第二种金属。 理想地,铱和二次金属作为载体材料沉积在活性炭上。 在本发明的优选方面,气相羰基化方法可用于制备乙酸,乙酸甲酯或其混合物。

    Group 5 metal promoted iridium carbonylation catalyst
    8.
    发明授权
    Group 5 metal promoted iridium carbonylation catalyst 有权
    第5族金属促进铱羰基化催化剂

    公开(公告)号:US06355595B1

    公开(公告)日:2002-03-12

    申请号:US09382957

    申请日:1999-08-25

    IPC分类号: B01J2300

    摘要: A solid supported catalyst suitable for the vapor phase carbonylation of lower aliphatic alcohols, ethers, ester, and ester-alcohol mixtures, and desirably, methanol, to produce acetic acid, methyl acetate and mixtures thereof. The solid supported catalyst includes an effective amount of iridium and at least one second metal selected from group metals of the periodic table of elements, their respective salts and mixtures thereof associated with a solid support material. Desirably, the support material is selected from carbon, activated carbon, pumice, alumina, silica, silica-alumina, magnesia, diatomaceous earth, bauxite, titania, zirconia, clay, magnesium silicate, silicon carbide, zeolites, ceramics and combinations thereof.

    摘要翻译: 适用于低级脂族醇,醚,酯和酯 - 醇混合物以及理想的甲醇的气相羰基化产生乙酸,乙酸甲酯及其混合物的固体负载型催化剂。 固体负载催化剂包括有效量的铱和至少一种选自元素周期表的族金属的第二金属,它们各自的盐和与固体支持材料的混合物。 理想地,载体材料选自碳,活性炭,浮石,氧化铝,二氧化硅,二氧化硅 - 氧化铝,氧化镁,硅藻土,铝土矿,二氧化钛,氧化锆,粘土,硅酸镁,碳化硅,沸石,陶瓷及其组合。