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AssigneesChina Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
InventorsPeng Yu, Jingsong Liu, Junfeng Rong, Changzhi Shi, Qiang Fu, Jin Wang, Wei Zhang, Xuhua Zhou
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A process for preparing polyoxymethylene dimethyl ethers from methanol is disclosed. For example, the process comprises contacting methanol with at least one oxidant in the presence of at least one catalyst wherein the at least one catalyst comprises at least one Group VIB metal component, such as in an amount of from about 0.5 to about 50 wt % (in terms of metal oxide) and at least one Group VIII metal component, such as in an amount of from about 0.2 to about 20 wt % (in terms of metal oxide), and at least one molecular sieve having acidic catalytic activity, such as in an amount of from about 40 to about 95 wt %, based on the total weight of the at least one catalyst for a time sufficient to obtain polyoxymethylene dimethyl ethers.
A process for preparing polyoxymethylene dimethyl ether from methanol, comprising contacting methanol with at least one oxidant in the presence of at least one catalyst, wherein the at least one catalyst comprises at least one Group VIB metal component, at least one Group VIII metal component, and at least one molecular sieve having acidic catalytic activity for a time sufficient to obtain polyoxymethylene dimethyl ether, wherein the metal components in the at least one catalyst are chosen from a group consisting of Group VIB metal components and Group VIII metal components, and wherein the at least one Group VIB metal component and the at least one Group VIII metal component are independently chosen from oxides, salts, and sulfides.
A gas-phase process of preparing polyoxymethylene dimethyl ethers (DMMx) from methanol, comprising mixing methanol and at least one oxidant to form a binary mixed gas of said methanol and said at least one oxidant, feeding the mixed gas into a reactor, and passing the mixed gas through a catalyst bed to form a product mixture containing DMMx, and adjusting the temperature of the reactor under controlled thermal conditions,
Dependencies are inferred from the claim text.