Production Of Cyclopentadiene From Furfural

    公开(公告)号:US20210188735A1

    公开(公告)日:2021-06-24

    申请号:US17077327

    申请日:2020-10-22

    Abstract: The application relates to processes and systems that use a furfural compound for producing five-membered carbocyclic rings that are unsaturated, such as cyclopentene and cyclopentadiene. Examples methods for conversion of furfural compounds may include converting a furfural compound to at least a five-membered, saturated carbocyclic ring, and converting the five-membered, saturated carbocyclic ring in a presence of a catalyst to at least a five-membered, unsaturated carbocyclic ring.

    Fused-ring alkane fuel and photocatalytic preparation process thereof

    公开(公告)号:US20200181040A1

    公开(公告)日:2020-06-11

    申请号:US16498386

    申请日:2018-07-09

    Abstract: A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than −50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.

    Method of preparing a calcium phosphate catalyst
    5.
    发明授权
    Method of preparing a calcium phosphate catalyst 失效
    磷酸钙催化剂的制备方法

    公开(公告)号:US4246247A

    公开(公告)日:1981-01-20

    申请号:US66495

    申请日:1979-08-14

    CPC classification number: B01J27/18 C07C1/247 C07C2527/167

    Abstract: Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting a calcium salt with a phosphoric acid salt in aqueous ammonia, separating the precipitate resulting from the reaction mixture thus obtained, suitably shaping said precipitate, drying it, and subjecting it to heat treatment within a temperature range of 450.degree. to 600.degree. C. in the presence of steam mixed with at least one of the components selected from the group consisting of an inert gas, air, phosphoric an acid, aldehyde, an oxygen-containing heterocyclic compound, an alcohol, and a diene hydrocarbon.The reaction of calcium salts with phosphoric acid salts in aqueous ammonia is effected with the starting reactants taken in the molar ratio of 1.5:1 if no phosphoric acid treatment is used, or with the starting reactants in a molar ratio within the range of 1.5:1 to 5.0:1 if the reaction mixture is treated with a phosphoric acid solution to a pH of from 5.0 to 7.0.

    Abstract translation: 公开了一种制备磷酸钙催化剂的方法,其包括使钙盐与磷酸盐在氨水中反应,将由此得到的反应混合物得到的沉淀物分离,适当地使所述沉淀物形成,干燥并使其加热 在与至少一种选自惰性气体,空气,磷酸,醛,含氧杂环化合物的组分混合的蒸汽存在下,在450℃至600℃的温度范围内进行处理 ,醇和二烯烃。 钙盐与磷酸盐在氨水中的反应是用起始反应物以1.5:1的摩尔比进行的,如果不使用磷酸处理,或起始反应物的摩尔比在1.5:1的范围内, 如果反应混合物用磷酸溶液处理至5.0至7.0的pH,则为1至5.0:1。

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