摘要:
A wax isomerization catalyst is described which comprises a Group VIII hydrogenation metal component on fluorided alumina or material containing alumina which catalyst possesses a surface nitrogen content N/Al ratio of about 0.01 or less determined by X-ray photoelectron spectroscopy, a bulk fluorine content of between about 2 to 10 wt %, a surface fluorine content defined as the amount of fluorine in a layer extending from the outer surface to a depth of about 1/100 of an inch of less than about 3 wt % provided that the surface fluoride concentration is less than the bulk fluoride concentration and an aluminum fluoride hydroxide hydrate peak height of 60 or less determined as the relative amount of hydrate represented by a peak in the X-ray diffraction pattern at 2.theta.=5.66 .ANG. when a hydrate level of 100 corresponds to the XRD peak height exhibited by a standard material. Also described is a method for producing a slack wax isomerization catalyst said method comprising depositing a Group VIII hydrogenation metal on alumina or material containing alumina extrudate, calcining said metal loaded extrudate, fluoriding said material using an aqueous fluorine source solution having a pH of 3.5 to 4.5 to a bulk fluorine level of about 8 wt % or less followed by heating in an air oxygen containing atmosphere or inert gas from ambient to 350.degree. to 450.degree. C. within 3 hours and holding at the final temperature, if necessary, for a time sufficient to reduce the hydrate and nitrogen contents to the aforesaid levels. Alternatively the catalyst can be made using a fluorine solution of pH less than 3.5 to a bulk fluorine level of about 10 wt % or less followed by heating in air or an oxygen containing atmosphere, or inert atmosphere at about 350.degree. to 450.degree. C.
摘要:
An improved wax isomerization catalyst is described which is a hydrogenation metal on halogenated refractory metal oxide support catalyst characterized in that the catalyst is prepared by depositing the hydrogenation metal on the refractory metal oxide support followed by fluoriding using a low pH fluorine source such as aqueous HF. Thereafter the catalyst is crushed to expose inner surfaces, the crushed catalyst being sieved to remove fines, the catalyst charge having an average particle diameter of 1/32 inch and smaller across the longest continuous cross sectional dimension, preferably between 1/64 to 1/32". Alternatively, the catalyst is made by depositing a hydrogenation metal on a refractory metal support, crushing the material to a particle size of 1/32 inch and smaller across the longest continuous cross-sectional dimension and fluoriding said material using acidic fluorine source such as HF. Following sizing the sized catalyst is activated by heating in a hydrogen atmosphere.Isomerization using this "sized" catalyst is marked by the production of an isomerized dewaxed oil product having unexpectedly high VI and superior levels of selective conversion of wax to liquid isomerized product.
摘要:
A process for the preparation of novel highly active, highly selective hydrotreating catalysts. These catalysts are prepared, in bulk or in supported form, by contacting together and decomposing, in the presence of hydrogen, hydrocarbon, and sulfur, a catalyst precursor characterized by the formula B.sub.x [Mo.sub.3 S.sub.z ] where B is an ammonium ion, polyammonium ion, tertiary or quaternary phosphonium ion, or a hydrocarbyl substituted ammonium ion, hydrocarbyl substituted polyammonium ion, or hydrocarbyl substituted tertiary or quaternary phosphonium ion, x is 1 where B is a divalent cationic moiety, or 2 where B is a monovalent cationic moiety, [Mo.sub.3 S.sub.z ] is a divalent anionic moiety wherein z is an integer ranging from about 10 to about 46. A preferred precursor catalyst species is Mo.sub.3 (S.sub.2).sub.6 S.
摘要:
This invention relates to novel catalysts, of two distinct types, useful for the catalytic hydroconversion of the 1050.degree.F.+ hydrocarbon material contained in heavy crudes and residua such that the resulting product will be suitable for further processing in conventional refinery operations allowing maximization of clean liquid products. Catalysts, which include Group VIB and Group VIII metals, preferably in admixture, and preferably including a Group IVA metal, notably germanium, having certain critical ranges of physical characteristics inclusive of large uniform pore sizes, are used for the conversion, these having been shown to possess improved catalytic activity and selectivity for the hydroconversion of the 1050.degree.F.+ materials of the heavy feeds and residua. Novel methods are described for the preparation of such catalysts, as well as for use of such catalysts. One of the catalysts, i.e., one having properties inclusive of a large number of pores in the 100-275A pore size diameter range, is particularly suitable as a first stage catalyst and the other, which has properties inclusive of a large number of pores in the 100-200A pore size diameter, is especially suitable as a second stage catalyst for use in processing the effluent of said first stage.
摘要:
A fluorided platinum-on-alumina catalyst for wax isomerization wherein the platinum is substantially uniformly distributed throughout the catalyst in the form of relatively small crystallites, of the total fluoride present in the catalyst very little is located on the outer surface of the catalyst and a significant concentration of the fluoride within the catalyst is present as aluminum fluoride hydroxide hydrate. The catalyst is prepared by contacting a platinum-on-alumina with a solution having a relatively high concentration of fluoride and drying the fluorided platinum-on-alumina catalyst at temperatures not in excess of 650.degree. F.
摘要:
A process for selectively producing middle distillate fuel products from paraffin waxes such as slack wax and Fischer-Tropsch wax by hydroisomerizing the wax to convert 60-95 weight percent per pass of the 700.degree. F..sup.+ fraction contained in said wax. The catalyst employed is a fluorided Group VIII metal-on-alumina catalyst where the fluoride within the catalyst is present predominately as aluminum fluoride hydroxide hydrate. The preferred Group VIII metal is platinum.
摘要:
A process for the production of high octane gasoline, or high octane gasoline blending components from a sulfur and nitrogen-containing feed composition of wide boiling range rich in fused multi-ring aromatic hydrocarbons containing two, and three or more rings in the molecule. The feed is first hydrogenated to desulfurize, denitrogenate and saturate one ring of the two-ring molecular species, but insufficient to saturate the second ring of said molecular species. The product, as a feed, is then hydrocracked to crack fused multi-ring aromatic hydrocarbons containing three or more rings to the molecule, and to produce lower molecular weight, lower boiling components. The product of the hydrocracker is then split into blends which include (i) a blend rich in fused two-ring aromatic hydrocarbons and (ii) a blend rich in fused multi-ring aromatic hydrocarbons containing three or more rings to the molecule. Blend (i) is selectively hydrogenated and cracked over a catalyst comprised of elemental iron and one or more alkali or alkaline-earth metals to produce gasoline or gasoline blending components, and blend (ii) is hydrocracked to produce gasoline or gasoline blending components.
摘要:
A process for the preparation of novel highly active, highly selective hydrotreating catalysts. These catalysts are prepared, in bulk or in supported form, from a catalyst precursor characterized by the formula B.sub.x [Mo.sub.3 S.sub.z ] where B is an ammonium ion, polyammonium ion, tertiary or quaternary phosphonium ion, or a hydrocarbyl substituted ammonium ion, hydrocarbyl substituted polyammonium ion, or hydrocarbyl substituted tertiary or quaternary phosphonium ion, x is 1 where B is a divalent cationic moiety, or 2 where B is a monovalent cationic moiety, [Mo.sub.3 S.sub.z ] is a divalent anionic moiety wherein z is an integer greater than 15. The catalyst precursor is dispersed in an ammonium sulfide or dilute ammonium polysulfide solution and heated to remove sulfur from said catalyst precursor to provide a z value of 15 or less. Carbon is also removed from the catalyst precursor and, where B of the B.sub.x [Mo.sub.3 S.sub.z ] catalyst precursor is a non-carbon containing moiety, the finished catalyst will contain an atomic ratio of C/Mo of less than about 0.05. Decomposition of the catalyst precursor in the presence of hydrogen, hydrocarbon and sulfur forms the highly active hydrotreating catalyst.
摘要翻译:一种制备新型高活性,高选择性加氢处理催化剂的方法。 这些催化剂以体积或负载形式由特征为式Bx [Mo 3 S z]的催化剂前体制备,其中B是铵离子,聚铵离子,叔或季鏻离子或烃基取代的铵离子,烃基取代的聚铵 离子或烃基取代的叔或季鏻离子,x是1,其中B是二价阳离子部分,或2其中B是一价阳离子部分,[Mo 3 S z]是二价阴离子部分,其中z是大于15的整数。 催化剂前体分散在硫化铵或多硫化铵溶液中并加热以从所述催化剂前体中除去硫以提供15或更小的az值。 碳也从催化剂前体中除去,并且其中Bx [Mo3Sz]催化剂前体的B是不含碳的部分,成品催化剂将含有小于约0.05的C / Mo的原子比。 在氢,烃和硫存在下分解催化剂前体形成高活性加氢处理催化剂。
摘要:
A slurry hydrotreating process is described in which a hydrotreating catalyst of small particle size is contacted with a heavy fossil fuel. High catalyst activity is maintained by circulating the catalyst between a hydrotreating zone and a reactivating zone where the catalyst is hydrogen stripped.
摘要:
A novel slurry hydrotreating process is described which employs a hydrotreating catalyst of small particle size having a quantity of catalyst sites in excess of those required for reaction and/or adsorption of nitrogen compounds in the petroleum or synfuel feed being treated. The excess catalyst sites can therefore in effect be contacted with a low nitrogen or essentially zero nitrogen feed, allowing rapid hydrogenation of aromatics at low temperatures where equilibrium is favored. In a further aspect of the invention, the catalyst which contains adsorbed nitrogen is activated by high temperature denitrogenation.