摘要:
The invention includes a method of dehydration of a sugar using a dehydration catalyst and a co-catalyst within a reactor. A sugar is introduced and H2 is flowed through the reactor at a pressure of less than or equal to about 300 psig to convert at least some of the sugar into an anhydrosugar product. The invention includes a process for producing isosorbide. A starting material comprising sorbitol is flowed into a reactor. H2 is counter flowed through the reactor. The starting material is exposed to a catalyst in the presence of a co-catalyst which comprises at least one metal. The exposing is conducted at a hydrogen pressure of less than or equal to 300 psig within the reactor and the hydrogen removes at least some of any water present during the exposing and inhibits formation of colored byproducts.
摘要翻译:本发明包括使用反应器内的脱水催化剂和助催化剂使糖脱水的方法。 引入糖,并且H 2 O 2以小于或等于约300psig的压力流过反应器,以将至少一些糖转化为脱水糖产物。 本发明包括制备异山梨醇的方法。 将含有山梨醇的原料流入反应器。 H 2反向流过反应器。 在包含至少一种金属的助催化剂的存在下,将原料暴露于催化剂。 暴露在反应器内在小于或等于300psig的氢气压力下进行,并且氢去除暴露期间存在的任何水中的至少一些,并且抑制着色副产物的形成。
摘要:
Disclosed are methods for producing dimethyl ether (DME) from methanol and for producing DME directly from syngas, such as syngas from biomass. Also disclosed are apparatus for DME production. The disclosed processes generally function at higher temperatures with lower contact times and at lower pressures than conventional processes so as to produce higher DME yields than do conventional processes. Certain embodiments of the processes are carried out in reactors providing greater surface to volume ratios than the presently used DME reactors. Certain embodiments of the processes are carried out in systems comprising multiple microchannel reactors.
摘要:
The invention includes a method of treating a solid acid catalyst. After exposing the catalyst to a mixture containing a sugar alcohol, the catalyst is washed with an organic solvent and is then exposed to a second reaction mixture. The invention includes a process for production of anhydrosugar alcohol. A solid acid catalyst is provided to convert sugar alcohol in a first sample to an anhydrosugar alcohol. The catalyst is then washed with an organic solvent and is subsequently utilized to expose a second sample. The invention includes a method for selective production of an anhydrosugar. A solid acid catalyst is provided within a reactor and anhydrosugar alcohol is formed by flowing a starting sugar alcohol into the reactor. The acid catalyst is then exposed to an organic solvent which allows a greater amount of additional anhydrosugar to be produced than would occur without exposing the acid catalyst to the organic solvent.
摘要:
The invention includes methods of producing dianhydrosugars. A polyol is reacted in the presence of a first catalyst to form a monocyclic sugar. The monocyclic sugar is transferred to a second reactor where it is converted to a dianhydrosugar alcohol in the presence of a second catalyst. The invention includes a process of forming isosorbide. An initial reaction is conducted at a first temperature in the presence of a solid acid catalyst. The initial reaction involves reacting sorbitol to produce 1,4-sorbitan, 3,6-sorbitan, 2,5-mannitan and 2,5-iditan. Utilizing a second temperature, the 1,4-sorbitan and 3,6-sorbitan are converted to isosorbide. The invention includes a method of purifying isosorbide from a mixture containing isosorbide and at least one additional component. A first distillation removes a first portion of the isosorbide from the mixture. A second distillation is then conducted at a higher temperature to remove a second portion of isosorbide from the mixture.
摘要:
The invention describes combustors and steam reformers and methods of combustion and steam reforming. For example, integrated combustion reactors are described in which heat from combustion is transferred to an endothermic reaction. Thermally efficient reactors and methods of alcohol steam reforming are also described. Also described is an integrated combustor/reformer containing a methanation catalyst.
摘要:
Carbon monoxide (CO) is selectively reacted with hydrogen (H2) over a ruthenium (Ru) on alumina catalyst at a temperature of about 210 to about 290° C. To be a viable option for micro catalytic fuel processing devices, highly active, selective, and stable catalysts must be demonstrated with as large a temperature window for feasible operation as possible. We have studied the effects of metal loading, preparation method, pretreatment conditions, and choice of support on the performance of Ru-based catalysts for such applications. Catalyst testing results and catalyst characterization using XRD and BET are discussed. In one example, operating at a gas hourly space velocity (GHSV) of 13,500 hr−1, a 3% Ru/Al2O3 catalyst yielded CO outputs less than 100 ppm in a temperature range from 240° C. to 285° C., while not exceeding a hydrogen consumption of 10%. This catalyst was further successfully demonstrated in a microchannel device.
摘要翻译:在约210至约290℃的温度下,一氧化碳(CO)在氧化钌催化剂上的钌(Ru)上选择性地与氢(H 2 O 2)反应。作为微催化剂的可行选择 燃料处理装置,高活性,选择性和稳定的催化剂必须用尽可能大的温度窗口进行演示,以实现可行的操作。 我们研究了金属负载的影响,制备方法,预处理条件以及对这种应用中Ru基催化剂性能的支持选择。 讨论了使用XRD和BET的催化剂测试结果和催化剂表征。 在一个实施例中,以13,500小时-1的气时空速(GHSV)操作3%Ru / Al 2 O 3 催化剂在240℃至285℃的温度范围内产生小于100ppm的CO输出,而不超过10%的氢消耗。 该催化剂在微通道装置中进一步成功地证明。
摘要:
A computer system comprises a keyboard with a plurality of touchbands, each of which is a narrow multi-touch touchpad, a display device and a computer touchband device application program executable on the computer processor configured to manage a multi-level context-dependent cascading menu interface wherein each menu item includes a plurality of drag-control functions, a plurality of tap commands and a plurality of submenu items; specify a plurality of menu operations, a plurality of control-drag operations and a plurality of command-tap operations from the multi-touch gestures on the touchbands; move the highlight in the menu structure based on the menu operations and display highlighted menu item contents under the active menu layer; change the value of the specified drag-control function listed for the highlighted menu item when detected a control-drag operation; trigger the specified tap command listed for the highlighted menu item when detected a command-tap operation.
摘要:
The present invention discloses the Theory and Method of Unified Internet Integration (UII) which is characterized in followings: the foundation theory of internet map/platform iconology, a series of conceptual definitions, specifications, standards and methods including a complete theoretical system and methodology invented to integrate all the Internet and other local area networks such as GIS, IoT, Block Chain etc into a whole. Especially, the present invention proposed a new concept of Positioning Oriented Architecture (POA) first time in the world and in computer science, and proposed a data structure of POA to organize all different types of icon positioning resources with other IP Address resources and service resources in a uniformed data format to form an icon positioning object to be transferred and used in all network platforms. This is impossible by all current traditional internet and network's theories and technologies.