摘要:
The present invention provides a catalytic cracking catalyst for heavy oil and preparation methods thereof. The catalyst comprises 2 to 50% by weight of a phosphorus-containing ultrastable rare earth Y-type molecular sieve, 0.5 to 30% by weight of one or more other molecular sieves, 0.5 to 70% by weight of clay, 1.0 to 65% by weight of high-temperature-resistant inorganic oxides, and 0.01 to 12.5% by weight of a rare earth oxide. The phosphorus-containing ultra-stable rare earth Y-type molecular sieve uses a NaY molecular sieve as a raw material. The raw material is subjected to a rare-earth exchange and a dispersing pre-exchange; the molecular sieve slurry is then filtered, washed with water and subjected to a first calcination to obtain a rare earth sodium Y molecular sieve which has been subjected to such “first-exchange first-calcination”, wherein the steps of rare earth exchange and dispersing pre-exchange are not restricted in sequence; and then the rare earth sodium Y molecular sieve which has been subjected to “one-exchange one-calcination” is subjected to “second exchange and second calcination” including ammonium exchange and a phosphorus modification, wherein the steps of the ammonium exchange and the phosphorus modification are not restricted in sequence. The steps of the ammonium exchange and the phosphorus modification can be conducted continuously or non-continuously, the second calcination is conducted after the ammonium exchange for reducing sodium, the phosphorus modification can be conducted before or after the second calcination. The catalyst provided by the invention has the characteristics of high heavy oil conversion capacity, high total liquid yield, and high yield of light oil.
摘要:
Mesoporous X and A zeolites and methods for production thereof are disclosed herein. Such mesoporous zeolites can be prepared by contacting an initial zeolite with an acid in conjunction with a mesopore forming agent. The initial zeolite can have a framework silicon-to-aluminum content in the range of from about 1 to about 2.5. Additionally, such mesoporous zeolites can have a total 20 to 135 Å diameter mesopore volume of at least 0.05 cc/g.
摘要:
In a process for carrying out a reaction, a liquid reaction mixture is contacted with a catalyst that includes silica and/or a silicate, in which process a silicon compound that is soluble in the liquid reaction mixture is added to the reaction mixture before being contacted with the catalyst. The aqueous reaction mixture suitably contains water, an alcohol or a mixture thereof.
摘要:
Solid mixed catalysts and methods for use in conversion of triglycerides and free fatty acids to biodiesel are described. A batch or continuous process may be used with the catalysts for transesterification of triglycerides with an alkyl alcohol to produce corresponding mono carboxylic acid esters and glycerol in high yields and purity. Similarly, alkyl and aryl carboxylic acids and free fatty acids are also converted to corresponding alkyl esters. The described catalysts are thermostable, long lasting, and highly active.
摘要:
A method is disclosed for making styrene and/or ethylbenzene by reacting toluene with a C1 source in the presence of a catalyst in a reactor sized and configured to provide for a moving catalyst bed therethrough to form a product stream including styrene and/or ethylbenzene.
摘要:
Compositions and methods for preparing mesoporous and/or mesostructured materials from low Si/Al zeolites. Various embodiments described herein relate to preparation of mesoporous and/or mesostructured zeolites via a framework modification step followed by a mesopore introduction step.
摘要:
The invention relates to a method for producing crude oil from biomass by direct liquefaction under atmospheric pressure, involving the following steps: introducing dried biomass into a reactor containing heavy oil to form a sump oil phase consisting of biomass and heavy oil; maintaining the temperature of the sump oil phase at a predetermined reaction temperature; condensing and collecting the volatile reaction products; and isolating and collecting the crude oil. Said method is characterized in that the heavy oil phase has at least 5 wt. % organically bound oxygen.
摘要:
The present invention is directed to catalytic cracking additives comprising a metals trapping material; and a high activity catalyst. The present invention is directed to processes for the catalytic cracking of feedstock comprising contacting said feedstock under catalytic cracking conditions with a composition comprising a bulk catalyst and a catalytic cracking additive, wherein the catalytic cracking additive comprises a metals trapping material; and a high activity catalyst. The invention is also directed to processes for increasing the performance of a bulk catalyst in the presence of at least one metal comprising contacting a feedstock with a catalytic cracking additive comprising a metals trapping material; and a high activity catalyst.
摘要:
A honeycomb structure includes a plurality of honeycomb units and an adhesive layer. Each of the plurality of honeycomb units has a longitudinal direction and includes zeolite, an inorganic binder, a first end face, a second end face, and a cell wall. The second end face is located opposite to the first end face in the longitudinal direction. The cell wall extends from the first end face to the second end face along the longitudinal direction to define cells. The adhesive layer includes zeolite and is provided between the plurality of honeycomb units to connect the plurality of honeycomb units. A ratio of a coefficient of thermal expansion of the adhesive layer to a coefficient of thermal expansion of each of the plurality of honeycomb units is in a range from approximately 0.8 to approximately 1.2.
摘要:
A material with a hierarchical porosity is described, constituted by at least two spherical elementary particles, each of said spherical particles comprising zeolitic nanocrystals having a pore size in the range 0.2 to 2 nm and a matrix based on silicon oxide, which is mesostructured, having a pore size in the range 1.5 to 30 nm and having amorphous walls with a thickness in the range 1 to 20 nm, said spherical elementary particles having a maximum diameter of 10 μm. the matrix based on silicon oxide may contain aluminium. The preparation of said material is also described.