摘要:
There is disclosed a process for regenerating a deactivated catalyst containing a zeolite and a noble metal of group VIII of the Periodic Table supported thereon which comprises subjecting the deactivated catalyst to decoking treatment under reductive or oxidative condition and subsequently to contact treatment with a solution containing a halogen or a halogen-containing compound and thereafter calcining the deactivated catalyst. According to the above process, the catalytic activity of a deactivated catalyst is restored to the level comparable to that of a fresh catalyst by the use of an inexpensive regenerating agent and simplified steps. Thus, the regeneration process is expected to find effective use in petroleum refinery, petrochemical industry, etc.
摘要:
The aromatic hydrocarbons rich in benzene, toluene and xylene are prepared from a hydrocarbon feed having from 6 to 12 carbon atoms by feeding the hydrogen in admixture with hydrogen in a ratio ranging from 0 to less than 1 mole with respect to each mole of the hydrocarbon, into contact with a catalyst prepared by depositing at least one metal belonging to group VIII of the periodic table on a macroporous zeolite treated with a halogenated compound. The aromatic hydrocarbons rich in benzene, toluene and xylene are useful as a base for high octane number gasoline or as petrochemical raw materials.
摘要:
A process for alkylating an isoparaffin comprising reacting an isoparaffin with a monoolefin in the presence of a salt of a heteropoly-acid as a solid catalyst. The salt of the heteropoly-acid is a compound obtained by substituting a cation for a hydrogen ion of a heteropoly-acid of the formula H.sub.k.X.Y.sub.m.Z.sub.12-m.O.sub.40.nH.sub.2 O, wherein X is a hetero-atom selected from the group consisting of P, Si, Ge and As, each of Y and Z is a polyatom selected from the group consisting of W, Mo and V, k is 3 or 4, m is 0 or 1, and n is a positive number.
摘要:
An improved process for producing hydrocarbons which comprises bringing oxygen-containing compounds into contact with a catalyst, said catalyst being a crystalline aluminosilicate, when determined after calcination in the air at 550.degree. C., having a composition represented by the following formula (I):pM.sub.2/n O.Al.sub.2 O.sub.3.qSiO.sub.2 (I)(wherein M represents at least one element selected from hydrogen, alkali metals, and alkaline earth metals, n represents the valence of M, and p and q each represent a molar ratio and are chosen within the ranges of 0.05.ltoreq.p.ltoreq.3.0, 5.ltoreq.q.ltoreq.500) and has a principal X-ray diffraction pattern as set forth in Table 1.
摘要:
A crystalline aluminosilicate, ISI-6, having a composition represented by the general formula (I) after being calcined in air at 550.degree. C., .sub.p M.sub.2/n O.Al.sub.2 O.sub.3.q SiO.sub.2 . . . (I) wherein M represents at least one element selected from hydrogen, alkali metals, and alkaline earth metals, n represents the valence of M, and p and q are within the ranges of 0.05.ltoreq.p.ltoreq.3.0 and 60.ltoreq.q.ltoreq.500.
摘要:
A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
摘要翻译:一种催化重整方法,包括将烃催化转化成芳族化合物,所述方法包括在商业启动条件下处理含有第Ⅷ族金属的卤化沸石催化剂(氢氧化钾),然后重整烃,其中所述催化剂是通过洗涤结合的沸石 催化剂底物或结合的沸石催化剂。 优选的咪唑是通过包括以下步骤制备的非酸性Pt K L-沸石催化剂,所述方法包括制备煅烧二氧化硅结合的KL-沸石催化剂基质的步骤; 用包含水的液体洗涤所述结合的沸石催化剂基质; 并将含有氯和氟的Pt和含卤素的化合物掺入所述洗涤的催化剂基质中。 氯化铵和氟化铵是优选的卤化物源。
摘要:
A catalytic reforming process is disclosed using a catalyst containing a Group VIII metal, low amounts of bismuth, and a zeolite L. The catalyst is a non-acidic, monofunctional reforming catalyst. Preferably, the catalyst contains one or more halogens. Preferably, the feed includes C.sub.8 hydrocarbons. The addition of small amounts of bismuth increase or substantially maintain catalyst stability. Unexpectedly low dealkylation rates are achieved using the catalyst while reforming to produce aromatics, especially to produce xylenes such as paraxylene.
摘要:
A process for producing aromatic hydrocarbons comprising contacting at least one hydrocarbon of the paraffin series, olefin series, acetylene series, cyclic paraffin series or cyclic olefin series with a catalyst containing an L-type zeolite containing both platinum components and halogen components supported thereon, the catalyst having a peak intensity of 0.4 or less as determined by X-ray absorption near edge structure (XANES), and the amount of dealuminization in the zeolite is 3% by weight or less, based on the total amount of aluminum therein.
摘要:
A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
摘要:
There are herein disclosed an L-type zeolite catalyst which is obtainable by supporting a platinum component, one or more halogen components and one or more metal components selected from the group Ib of the periodic table on an L-type zeolite, the support amount of one or more metal components selected from the group Ib being in the range of 0.001 to 3% by weight based on the total weight of the catalyst in terms of the metal, a molar ratio of one or more metal components selected from the group Ib/platinum being in the range of 0.01 to 1; and a method for producing aromatic hydrocarbons or a gasoline having a high octane number which comprises the step of bringing one or more fractions selected from a C6 fraction, a C7 fraction, and a C8.sup.+ fraction into contact with this catalyst. According to the present invention, there are provided a catalyst containing an L-type zeolite as a carrier which is desirable as a catalyst for the production of aromatic hydrocarbons or a gasoline having a high octane number and which can inhibit a cracking activity and the formation of coke and can improve an aromatic selectivity and a liquid yield.