摘要:
A method for the transalkylation of a heavy reformate is provided. The heavy reformate is contacted with a transalkylation catalyst and hydrogen gas in a transalkylation reactor to selectively convert the heavy reformate to a xylenes-rich product stream. Light alkanes produced during the reaction can be supplied to a steam cracker where they are converted to light olefins.
摘要:
The invention relates to a selective dismutation process of toluene and to a dismutation and transalkylation process of toluene and aromatic hydrocarbons of C9 and 9C+, which solve the problems in the prior art, such as large circulation in aromatics disposal, high energy consumption and critical requirement of raw materials, etc. In this invention, toluene is selectively dismutated to produce the mixed xylene with high concentration of p-xylene, toluene and aromatic hydrocarbons of C9 and C9+ are dismutated and transalkylated to obtain benzene and mixed xylene in thermodynamic equilibrium, by which the problems mentioned above can be overcame. These processes can be carried out in commercial scale.
摘要:
This disclosure relates to a process for manufacturing a mono-alkylaromatic compound, said process comprising contacting a feedstock comprising an alkylatable aromatic compound and an alkylating agent under alkylation reaction conditions with a catalyst comprising EMM-12, wherein said EMM-12 is a molecular sieve having, in its as-synthesized form and in calcined form, an X-ray diffraction pattern including peaks having a d-spacing maximum in the range of 14.17 to 12.57 Angstroms, a d-spacing maximum in the range of 12.1 to 12.56 Angstroms, and non-discrete scattering between about 8.85 to 11.05 Angstroms or exhibit a valley in between the peaks having a d-spacing maximum in the range of 10.14 to 12.0 Angstroms and a d-spacing maximum in the range from 8.66 to 10.13 Angstroms with measured intensity corrected for background at the lowest point being not less than 50% of the point at the same XRD d-spacing on the line connecting maxima in the range of 10.14 to 12.0 Angstroms and in the range from 8.66 to 10.13 Angstroms.
摘要:
This disclosure relates to a process for manufacturing a mono-alkylaromatic compound, said process comprising contacting a feedstock comprising an alkylatable aromatic compound and an alkylating agent under alkylation reaction conditions with a catalyst comprising EMM-12, wherein said EMM-12 is a molecular sieve having, in its as-synthesized form and in calcined form, an X-ray diffraction pattern including peaks having a d-spacing maximum in the range of 14.17 to 12.57 Angstroms, a d-spacing maximum in the range of 12.1 to 12.56 Angstroms, and non-discrete scattering between about 8.85 to 11.05 Angstroms or exhibit a valley in between the peaks having a d-spacing maximum in the range of 10.14 to 12.0 Angstroms and a d-spacing maximum in the range from 8.66 to 10.13 Angstroms with measured intensity corrected for background at the lowest point being not less than 50% of the point at the same XRD d-spacing on the line connecting maxima in the range of 10.14 to 12.0 Angstroms and in the range from 8.66 to 10.13 Angstroms.
摘要:
A synthetic porous cystalline material has the structure of ZSM-5 and a composition involving the molar relationship: X2O3:(n)YO2, wherein X is a trivalent element; Y is a tetravalent element; and n is less than 25, and wherein the slope of the nitrogen sorption isotherm of the material at a partial pressure of nitrogen of 0,4 to 0,7 and a temperature 77 °K is greater than 30. The material has a mesoporous surface area (MSA) greater than 45 m2/g and is useful as a catalyst in the liquid phase isomerization of xylene.
摘要:
The invention relates to a catalytic method for the transalkylation/dealkylation of organic compounds, consisting in bringing a supply comprising organic compounds into contact with a catalyst containing a first zeolitic component that is selected from among: a) one or more zeolites having crystalline structure ITQ-13; b) one or more zeolites having crystalline structure ITQ-13, which are modified either by means of selectivation or with the incorporation of one or more metals, or both; and c) a mixture of a) and b). The invention also relates to a catalyst comprising one or more modified zeolites having crystalline structure ITQ-13.