摘要:
A process is described for pretreating lignocellulosic biomass. The process comprises swelling the lignocellulosic biomass with an aqueous liquid. The pretreated lignocellulosic biomass may be used as a feedstock for the enzymatic conversion to ethanol, or in a thermal conversion. process to produce bio-oil. The pretreatment results in a greater yield and, in the case of a thermal conversion process, a better quality of the bio-oil. The pretreatment process may be used to adjust the composition and amount of inorganic material present in the lignocellulosic biomass material.
摘要:
A process is disclosed for converting a biomass material to a stabilized bio-oil. The process comprises converting the biomass to a pyrolytic oil having suspended therein particles of metal compounds, and removing at least part of the suspended metal compounds to obtain a stabilized bio-oil.
摘要:
The present invention relates to the conversion of solid biomass to liquid fuels and specialty chemicals. The process utilizes an activating step to make the biomass more susceptible to conversion, that is the biomass is broken down such that the components of the biomass are dissociated. Subsequently, the activated biomass undergoes a reaction to convert it to a bio-oil.
摘要:
A composition comprising FCC catalyst particles and additive particles suitable for the reduction of NOx emissions from a FCC regenerator, said additive particles comprising a Mg and Al-containing anionic clay or solid solution, a rare earth metal oxide, alumina and/or silica-alumina, and Y-type zeolite. The invention further relates to a process for preparing such a composition and its use for reducing NOx emissions.
摘要翻译:一种包含FCC催化剂颗粒和适用于从FCC再生器中还原NO x x排放的添加剂颗粒的组合物,所述添加剂颗粒包含含Mg和Al的阴离子粘土或固溶体,稀土金属氧化物 ,氧化铝和/或二氧化硅 - 氧化铝和Y型沸石。 本发明进一步涉及一种制备这种组合物的方法及其用于减少NO x排放的用途。
摘要:
A process for the preparation of a metal-doped pentasil-type zeolite comprising the steps of: a) preparing an aqueous precursor mixture comprising a silicon source and an aluminum source, at least one of these sources being doped with a rare earth metal or a transition metal of Groups Vb–VIIIb, Ib, or IIb of the Periodic System, and b) thermally treating the precursor mixture to form a metal-doped pentasil-type zeolite. With this process, metal-doped pentasil-type zeolites can be prepared while the risk of precipitation of the dopant as a separate phase is minimized.
摘要:
The invention pertains to a continuous process for the conversion of inorganic solid starting particles which either are amorphous or possess a degree of order into inorganic solid product particles which (a) when the starting particles are amorphous, possess a degree of order, or (b) when the starting particles possess a degree of order, possess a different order, a different degree of order, or no order, which product particles are suitable for use in or as a catalyst, in or as a carrier, or in or as an adsorbent, in which process the starting particles are dispersed in a liquid thus forming a suspension. The suspension flows through at least two separate conversion vessels (3) which are connected in series and the suspension is agitated in each of these vessels (3). The invention furthermore relates to an apparatus suitable for carrying out the process according to the invention. This invention allows the processing of suspension with a high Solids to Liquid Ratio.
摘要:
A process for the preparation of a composition comprising a pentasil-type zeolite, which process comprises the following steps:a) hydrothermally treating an aqueous slurry comprising an aluminium source, a silicon source, a seeding material, and optionally a divalent metal source, thereby forming a pentasil-type zeolite and at least one other compound, andb) shaping the product of step a). Examples of the at least one other compound are anionic clay, cationic clay, Si—Al cogel, and (pseudo)boehmite.
摘要:
The present invention provides new compositions of matter, referred to as quasi-crystalline carboxylates (QCCs), their preparation and use. The materials comprise a quasi-crystalline hydrated magnesium-aluminium hydroxy carboxylate and are characterised by the presence of at least a strong reflection in the powder X-ray diffraction pattern at a basal spacing in the range of 5 to 15 Å. The invention further relates to a process for preparing the QCCs, Mg—Al solid solutions and anionic clays under acidic conditions. The QCC is prepared by aging an acidic mixture of a magnesium carboxylate and an aluminium source. Calcination of the QCC results in a Mg—Al solid solution; rehydration of this solid solution gives an anionic clay.
摘要:
A process for preparing molecular sieves of type Y faujasite structure is described, as well as pre-shaped bodies of faujasite structure type Y molecular sieves. The process comprises preparing a precursor gel from a source of silica-alumina or a source of alumina and a source of silica with a template agent at a SiO2/Al2O3 greater than 7 and suitable for forming a type Y zeolite, drying the precursor gel and contacting the dried precursor gel with steam, optionally followed by caustic washing, without the formation of crystalline phases other than type Y zeolite being observed. Advantageously, the pre-shaped bodies prepared with the precursor gel of Y zeolite, when subjected to the process of the invention, will have their outer surface covered by type Y zeolite crystals. The molecular sieves so obtained may be employed as catalysts or adsorbents in various processes of the chemical or oil industry.
摘要翻译:描述了制备Y型八面沸石结构的分子筛的方法,以及Y型分子筛的八面沸石结构体的预制体。 该方法包括从二氧化硅 - 氧化铝源或氧化铝源和二氧化硅源以二氧化硅/ Al 2 O 3大于7的模板剂制备前体凝胶并适于形成Y型沸石,干燥前体凝胶和 使干燥的前体凝胶与蒸汽接触,任选地随后进行苛性碱洗涤,而不形成除Y型沸石以外的结晶相。 有利的是,当用Y沸石的前体凝胶制备的预制体在进行本发明的方法时,其外表面将被Y型沸石晶体覆盖。 如此获得的分子筛可用作化学或石油工业的各种方法中的催化剂或吸附剂。
摘要:
This invention relates to catalysts containing crystalline alumino-silicate zeolite, hydrothermally treated silica-alumina cogels and the employment of the same as cracking catalysts.