China Petroleum Chemical Corporation

Shanghai Research Institute of Petrochemical Technology, Sinopec

Other

Dejin Kong

Deqin Yang

Huaying Li

Qi Song

Weisheng Yang

Hongli Guo

Junlin Zheng

Xiangdong Jiang

Zhirong Zhu

Wei Zhang

Zaiku Xie

Qingling Chen

Xuan Xu

Min Hou

Jian Xiao

Xiaolan Qi

Weiyi Tong

Luping Zhong

Jingqiu Li

Yan Chen

Jian Ding

Weimin Yang

Wei Zou

Rong Zhang

Tian Ruan

Xuguang Li

Yanzi Guo

Zongshuang Wang

Xuemei Chen

Liangkai Wang

Sc Edman Tsang

Yongyan Lu

Ivo Teixeria

Dongmao Zhu

Wencai Cheng

Provided are a full conversion process and a device thereof for producing light aromatic hydrocarbon from LCO. The process includes the steps of: subjecting LCO stream to hydrofining and impurity separation, then performing selective conversion reaction, and separating the mixed aromatic hydrocarbons generated to sequentially separate out light aromatic hydrocarbons such as benzene-toluene and xylene, CA aromatic hydrocarbons, CA aromatic hydrocarbons and a bottom heavy tail oil; feeding the bottom heavy tail oil into a post-saturation selective reactor, subjecting to high-selectivity hydrogenation saturation under the conditions of low temperature and low pressure to provide a product having one benzene ring, and then returning the product back to the selective conversion reactor. The full-cut conversion of producing light aromatic hydrocarbon from LCO is achieved, resulting in the technical effects of high yields of monocyclic aromatic hydrocarbons such as benzene-toluene, xylene, CA aromatic hydrocarbons, CA aromatic hydrocarbons and the like.

Full conversion method and device for producing light aromatic hydrocarbons from light cycle oil

A method for processing a gasoline fraction includes the steps of: a) reacting the gasoline fraction in an aromatization unit, and separating the resulting reaction product to obtain a Ccomponent, a Ccomponent, a C-Ccomponent, a Ccomponent and a Ccomponent; b) reacting the resulting C-Ccomponent and the Ccomponent in a cracking and aromatics conversion unit, and separating the resulting reaction product to obtain a Ccomponent, a Ccomponent, a C-Ccomponent, a Ccomponent and a Ccomponent; and c) recycling at least a part of at least one of the C-Ccomponent and the Ccomponent from step b) to the cracking and aromatics conversion unit of step b) for further reaction. The method can convert the gasoline fraction into Caromatic hydrocarbon(s) and produce light olefins and a high-quality light gasoline as byproducts.

Method and system for processing gasoline fractions

A catalyst for producing light aromatics with heavy aromatics, a method for preparing the catalyst, and a use thereof are disclosed. The catalyst comprises a carrier, component (), and component (), wherein component () comprises one metal element or more metal elements selected from a group consisting of Pt, Pd, Ir, and Rh, and component () comprises one metal element or more metal elements selected from a group consisting of IA group, IIA group, IIIA group, IVA group, IB group, IIB group, IIIB group, IVB group, VB group, VIB group, VIIB group, La group, and VIII group other than Pt, Pd, Ir, and Rh. The catalyst can be used for producing light aromatics with heavy aromatics, whereby heavy aromatics hydrogenation selectivity and light aromatics yield can be improved.

Catalyst for producing light aromatics with heavy aromatics, method for preparing the catalyst, and use thereof

The present invention relates to a process for preparing an aromatic hydrocarbon, and processes for producing p-xylene and terephthalic acid. The process for producing said aromatic hydrocarbon comprises a step of contacting an olefin with a diene in the presence of a catalyst to produce an aromatic hydrocarbon, which is characterized in that, at least a part of said olefin is substituted with dienophile. The reaction pressure can be reduced and the xylene selectivity can be increased with the improvement of the present invention.

Processes for producing aromatic hydrocarbon, p-xylene and terephthalic acid

The present invention relates to a process for producing aromatics, a process for producing p-xylene and terephthalic acid, and a device for producing aromatics. The process for producing aromatics at least comprises a step of producing C8 olefin from a compound having a lactone group and a step of producing aromatics from the C8 olefin. The process for producing aromatics has the characters of high yield of aromatics and high selectivity to xylene.

Process for producing aromatics, p-xylene and terephthalic acid, and device for producing aromatics

The present invention relates to a process for producing aromatics, p-xylene and terephthalic acid. The process for producing aromatics comprises a step of contacting an oxygen-containing raw material with an aromatization catalyst, under aromatization reaction conditions, to produce aromatics. The process for producing aromatics has an advantage of high yield of carbon as aromatics.

Process for producing aromatics, p-xylene and terephthalic acid

The present invention discloses a catalyst for toluene shape selective disproportionation, comprising: a) 45 to 95 wt % of ZSM-5 molecular sieve having an average particle size of from 0.3 to 6 &#x3bc;m and a molar ratio of SiOto AlOof from 20 to 120; b) 0.01 to 30 wt % of at least one metal selected from the group consisting of Group IIB metals, Group IIIB metals, rare earth elements and Group VIII metals other than nickel, or oxide(s) thereof; c) 0 to 20 wt % of at least one metal selected from the group consisting of Group VA metals, Group VIB metals and alkaline earth metals, or oxide(s) thereof; d) 1 to 25 wt % of a silica inert surface coating derived from an organopolysiloxane; and e) 1 to 50 wt % of a binder. The present invention further discloses a process for shape selectively disproportionating toluene into p-xylene, comprising contacting a reaction stream containing toluene with the catalyst for toluene shape selective disproportionation under toluene disproportionation conditions.

Toluene selective disproportionation catalyst

Provided is a process for crystallization separating p-xylene, comprising: a) feeding a mixed xylenes stream comprising greater than or equal to 60% by weight, of p-xylene, such as 60% to 98% by weight of p-xylene, to a crystallization unit to perform cooling crystallization, to obtain a slurry comprising p-xylene crystals; and b) feeding the slurry to a filtration and purification unit, to obtain a mother liquor, washings, and p-xylene, wherein the filtration and purification unit uses a simulated moving bed or a combination of multiple moving beds.

Process for the crystallization separation of P-xylene

A process of making p-xylcne comprising processing a mixed feedstock containing benzene, toluene, Caromatic hydrocarbons, Cand higher aromatic hydrocarbons, and non-aromatic hydrocarbons through a series of operations and various units, including a Cand higher aromatic hydrocarbon dealkylation unit, a toluene selective disproportionate unit, an adsorption separation unit, an isomerization unit, and a crystallization separation unit.

Integrated process for the production of P-xylene

The present invention relates to a process for the manufacture of catalysts used for producing para-xylene by toluene shape selective alkylation. The invention is primarily used for solving the problems in the old technology, e.g., high requirements on the environment and great treatment of waste water containing organic amines when synthesizing ZSM-5 molecular sieves by using an organic amine as the template agent; small and non-homogeneous particles of the molecular sieves when synthesizing ZSM-5 molecular sieves by using an alcohol or ether as the template agent, such that the catalyst prepared thereby has low catalytic selectivity and low toluene conversion rate, etc. Said problems are better solved in the present invention by synthesizing ZSM-5 molecular sieves using the combination of organic amines and alcohols or ethers as the template agents (having a weight ratio of organic amines/alcohols=0.05-150, and organic amines/ethers=0.05-150), and modifying with organosilicon so as to obtain the catalysts. Said catalysts can be used in the industrial production of para-xylene manufactured by toluene shape selective alkylation.

Process for the manufacture of catalysts used for producing para-xylene by toluene shape selective alkylation

A process for the disproportionation and transalkylation of toluene and the heavy aromatics comprises: subjecting a first stream of toluene, and a stream enriched in aromatics of nine carbon atoms to toluene disproportionation and transalkylation reactions in the presence of hydrogen in a first reaction zone to produce a first product mixture comprising benzene, aromatics of eight carbon atoms and heavy aromatics of ten and more carbon atoms; subjecting a second stream of toluene, and a stream enriched in heavy aromatics of ten and more carbon atoms to transalkylation reaction in the presence of hydrogen in a second reaction zone to produce a second product mixture comprising benzene, aromatics of eight carbon atoms and aromatics of nine carbon atoms; and isolating and recovering benzene and aromatics of eight carbon atoms from the first and second product mixtures.

Process for the disproportionation and transalkylation of toluene and heavy aromatics

A complete new process for producing p-xylene is provided to solve the problems in the prior arts of the great amount of benzene as a by-product and the requirement of low content of Cheavy aromatics in the feedstock. The process comprises first subjecting benzene and Caromatics to alkyl transfer reaction to produce toluene and Caromatics, then conducting toluene selective disproportionation, and molecular sieve adsorptive separation and isomerization of Caromatics, to obtain p-xylene.

Process for producing p-xylene

The present invention relates to a process for the selective disproportionation of toluene and the disproportionation and transalkylation of toluene and C aromatics to mainly solve the problems in the prior arts of the great amount of recycle stream, high energy consumption or harsh requirement for the reaction feedstocks. The present invention has better solved these problems by the technical solution using a process for selective disproportionation of toluene to produce mixed xylenes containing a high concentration of p-xylene, and subsequent disproportionation and transalkylation of C aromatics and toluene to produce benzene and the mixed xylenes which are in the thermodynamic equilibrium. The process is applicable to the industrial production.

Process for selective disproportionation of toluene and disproportionation and transalkylation of toluene and C9&plus; aromatics

The present invention relates a catalyst for the conversion of aromatic hydrocarbons, comprising by weight 20 to 90 parts of a crystalline aluminosilicate zeolite with a SiO /Al O molar ratio of 10 to 100, 0.05 to 10 parts of metal bismuth or oxides thereof supported on the zeolite, 0 to 5 parts of one or more types of metal(s) M or oxides thereof, M being selected from the group consisting of molybdenum, copper, zirconium, strontium, lanthanum, rhenium, iron, cobalt, nickel and silver, and 10 to 60 parts of alumina as an adhesive. The present invention also relates to a process for the conversion of aromatic hydrocarbons using the catalyst of the present invention and uses thereof in the production of aromatic hydrocarbons.

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Shanghai, China

Dejin Kong