摘要:
A aromatic alkylation catalyst, processes for producing the catalyst, and aromatic alkylation processes employing the catalysts are disclosed. The catalyst comprises a UZM-8 zeolite and nitrogen, and the catalyst has a nitrogen to zeolite aluminum molar ratio of at least 0.015. In an exemplary alkylation process, the catalyst provides improved product yield.
摘要:
A process is disclosed using a new catalyst for use in the alkylation of benzene with a substantially linear olefin. The catalyst allows for cation exchange with a rare earth element to increase the alkylation of benzene, while reducing the amount of isomerization of the alkyl group. This is important for increasing the quality of the alkylbenzene by increasing the linearity of the alkylbenzene.
摘要:
The present invention is directed to a zeolite Y catalyst having a controlled macropore structure. The present invention is also directed to a zeolite Y catalyst composite and a process for preparing the catalyst composite. The catalyst composite exhibits reduced deactivation rates during the alkylation process, thereby increasing the life of the catalyst. The present invention is also directed to processes for the preparation of carbonated, overbased aromatic sulfonates, which processes comprise alkylation, carbonation of aromatic hydrocarbons with one or more olefins.
摘要:
A catalyst is described that comprises at least one IZM-2 zeolite and at least one matrix, said zeolite having a chemical composition, expressed on an anhydrous basis, in terms of moles of oxides, by the following general formula: XO 2 :aY 2 O 3 :bM n O in which X represents at least one tetravalent element, Y represents at least one trivalent element and M is at least one alkali metal and/or alkaline-earth metal, a and b respectively representing the number of moles of Y 2 O 3 and M n O and a is between 0.001 and 0.5, b is between 0 and 1 and n is between 1 and 2. Said catalyst is used in various processes for the conversion of hydrocarbon-based feedstocks.
摘要:
The present invention relates to a method for purifying alkyl aromatic compounds that is based on a system for percolating the fraction of the alkylate in which the chromophor precursors are concentrated using a selected clay placed in a fixed-bed reactor.
摘要:
The present invention refers to a procedure for obtaining a linear monoalkylaromatic compound, with adjustable 2-phenyl isomer content and an extremely low sulphonation color, in which a catalytic system is used based on highly stable and active solid catalysts and with a high selectivity for linear monoalkylaromatic compounds.
摘要:
The present invention relates to a process for obtaining a highly soluble linear alkylbenzene sulfonate with an adjustable 2-phenyl isomer content and an extremely low sulfonation color, in which a catalytic system based on highly stable solid catalysts and with a high selectivity for linear monoalkylated compounds is used.
摘要:
Integrated, energy efficient process for making detergent range alkylbenzenes use a combination of a low benzene to olefin feed ratio for alkylation, alkylbenzene refining system operation ( 138, 144, 150) and a transalkylation ( 168) of dialkylbenzene co-produced during alkylation is used to reduce energy costs per unit of alkylbenzene product.
摘要:
Spent benzene from a regeneration of a catalyst or solid sorbent in an alkylbenzene complex is subjected to a rough distillation and the benzene fraction from the rough distillation is used a at least a portion of the benzene for a unit operation in the alkylbenzene complex or is passed to a benzene distillation column in the crude alkylbenzene refining section. The processes of this invention can enhance the purity of the alkylbenzene product and can reduce energy consumption per unit of alkylbenzene product or can assist in debottlenecking the crude alkylbenzene refining section of the alkylbenzene complex.
摘要:
Continuous processes for monoalkylating aromatic compound with an aliphatic feedstock comprising aliphatic olefin of 8 to 18 carbon atoms per molecule are effected using at least 3 reaction zones (104, 106a, 106b) in series, each containing solid alkylation catalyst with effluent cooling between reaction zones (104, 106a, 106b), each of which reaction zones is supplied a portion of the fresh aliphatic feedstock, such that the Reaction Zone Delta T in each reaction zone (104, 106a, 106b) is less than 15°C. The overall aromatic compound to olefin molar ratio is less than 20:1. The alkylation product has desirable linearity and low amounts of dimers, dealkylated compounds and diaryl compounds even though a low aromatic compound to olefin molar ratio is used.