Process for alkyl transfer production of xylene from carbon nine or more aromatic hydrocarbon and benzene or the mixture of benzene and toluene
A technology of transalkylation and xylene, which is applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as short circuit, poor adaptability of radial reactors, and catalyst poisoning, and achieve good technical effects and improve The effect of effective utilization rate and conversion rate improvement
Active Publication Date: 2006-12-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the poor adaptability of using radial reactors in the above-mentioned documents, the catalyst basket is easy to be poisoned in a large area, which affects the life of the catalyst or in the previous axial radial reaction process, due to radial and axial settlement, there are The shortcoming that the reaction gas is easy to cause a short circuit provides a new method for the production of xylene by transalkylation of a mixed raw material of aromatics with carbon nine and above and benzene or benzene and toluene
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Embodiment 1
[0023] C 9 + The catalytic reaction between A and benzene in a hydrogen atmosphere is carried out with a set of equipment. The production block diagram is shown as figure 1 . Reactor adopts figure 2 In the reactor, the catalyst used is β zeolite. The diameter of the distribution cylinder in the reactor is 1000 mm, the radial thickness of the bed is 800 mm, and the total static height is 10,000 mm. The shape of the flange 29 at the junction of the axial section 26 and the radial section 25 of the inner distribution cylinder 31 of the reactor is triangular, the apex angle α of the triangle deep into the catalyst bed is 40 degrees, and the symmetry line of the apex angle is perpendicular to the inner distribution cylinder (That is, the β angle is 0), and the vertical height between the top of the flange and the inner distribution cylinder is 80 mm. The temperature at which the reaction materials enter the reactor is 360°C, the pressure is 3.0 MPa, and the aromatic hydrocarbon flow ...
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Abstract
The invention discloses a manufacturing method of xylene, which is characterized by the following: adopting C9 and aromatic hydrocarbons and benzene or benzene and toluene as raw material; adopting radial and axial reactor with axial segment on the radial segment; connecting a ring-shaped flange of deep catalyst layer on the inner segment wall of cylinder; avoiding gas short-circuit phenomenon; fitting for industrial manufacturing of aromatic hydrocarbons.
Description
Technical field [0001] The present invention relates to an aromatic hydrocarbon of carbon nine and above (hereinafter referred to as C 9 + A) A method for producing xylene by transalkylation with benzene or a mixed raw material of benzene and toluene. Background technique [0002] Xylene is the raw material for the production of p-xylene, and p-xylene is one of the main basic organic raw materials in the petrochemical industry. It has a wide range of uses in many chemical production fields such as chemical fiber, synthetic resin, pesticides, medicine, and plastics. The largest use of benzene is the production of styrene, cyclohexane and phenol, the three of which account for 80% to 90% of total benzene consumption, followed by nitrobenzene, maleic anhydride, chlorobenzene, and linear alkylbenzene. [0003] Increasing the production of xylene by using C9 aromatics is an effective way to increase the production of p-xylene. The traditional method of ut...
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IPC IPC(8): C07C15/08C07C6/12
Inventor 杨卫胜邵百祥张惠明李丽
Owner CHINA PETROLEUM & CHEM CORP