摘要:
A catalytic cracking catalyst having a rich mesoporous structure and a preparation method therefor. The catalyst, on a dry basis, comprises: 10-35% by weight of a meso and macro pore aluminum oxide based on aluminum oxide, 5-30% by weight of an acidifying binder based on oxide, 2-20% by weight of a second binder based on oxide, 20-60% by weight of a zeolite, and 5-50% by weight of a clay; the meso and macro pore aluminum oxide is an aluminum oxide with a pseudo boehmite structure, which has a total pore volume of 0.5-2.0 mL/g, an average pore size of 5-30 nm, and a specific surface area of 250-450 m 2/g, wherein the pore volume of 5-100 nm pores accounts for 80% or more of the total pore volume; the weight ratio of the acidifying binder to the meso and macro pore aluminum oxide is 0.5-1.0. The catalytic cracking catalyst according to the present invention has a rich mesopore structure, a total pore volume not less than 0.200 mL/g, the pore volume of 2-100 nm meso and macro pores accounting for 70% or more of the total pore volume, and the pore volume of 4-50 nm mesoporous pores accounting for 60% or more of the total pore volume, as measured by a low-temperature nitrogen adsorption method. Therefore, it has a great attrition resistance strength, an enhanced heavy oil conversion capacity, a significantly improved coke selectivity.
摘要:
According to the present invention, a molded catalyst for use in the production of methyl methacrylate can be provided. The molded catalyst comprises synthetic faujasite-type zeolite and a layered magnesium silicate compound, wherein the sulfur content in the layered magnesium silicate compound is 0.10% by weight or less. According to the present invention, a method for producing methyl methacrylate can also be provided. The method is characterized by comprising a step of carrying out a gas-phase catalytic reaction of methyl ±-hydroxyisobutyrate using the above-mentioned molded catalyst for use in the production of methyl methacrylate.
摘要:
The invention relates generally to a sodium faujasite catalyst, and in particular the use of the sodium faujasite catalyst in producing acrylic acid. In particular, the invention relates to the use of the sodium faujasite catalyst in catalytic dehydration of lactic acid and 3-hydroxypropionic acid (3-HP) to produce acrylic acid.
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:
The present invention provides an improved fluidized catalytic cracking process coupled with a two stage regeneration process in which the activity of the circulating catalyst is independently controlled for cracking hydrocarbon feedstocks or the vapors at low severity to produce maximum light cycle oil/distillate in one riser whilst cracking recycle streams comprising heavy cycle oil (HCO), light cracked naphtha (LCN) etc. in a second riser operating at high severity to produce LPG.
摘要:
The present invention is related to a producing method of monocyclic aromatic hydrocarbons in which reaction products including monocyclic aromatic hydrocarbons are produced by bringing an oil feedstock and an aromatic production catalyst into contact with each other, the oil feedstock having a 10 volume % distillation temperature of more than or equal to 140°C and a 90 volume % distillation temperature of less than or equal to 380°C, the method including the steps of: introducing the oil feedstock into a cracking and reforming reaction apparatus (10) housing the aromatic production catalyst; bringing the oil feedstock and the aromatic production catalyst into contact with each other at the inside of the cracking and reforming reaction apparatus (10) housing the aromatic production catalyst; heating the oil feedstock in advance before introducing the oil feedstock into the cracking and reforming reaction apparatus (10) and forming a two-phase gas-liquid stream; separating the two-phase gas-liquid stream into a gas fraction and a liquid fraction; and introducing the gas fraction and the liquid fraction at different positions of the cracking and reforming reaction apparatus (10).