Hydrogen type ZSM-35/EU-1 eutectic zeolite, aromatic isomerization catalyst, preparation method and application

A ZSM-35, eutectic zeolite technology, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of high non-aromatic hydrocarbon content, affecting the yield and energy consumption of aromatic hydrocarbon complexes, and reducing the purity of benzene And other issues
CN112299435AActive Publication Date: 2021-02-02PETROCHINA CO LTD
12 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2021-02-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a hydrogen type ZSM-35 / EU-1 eutectic zeolite, an aromatic isomerization catalyst containing the eutectic zeolite, a preparation method and applications thereof, the zeolite isprepared by the following steps: 1) adding a certain amount of EU-1 zeolite to a NaOH solution, uniformly stirring, adding a template agent, a silicon source and water, and uniformly stirring; and 2)transferring the solution to a stainless steel kettle, crystallizing at 100-300 DEG C for 12-36 hours, taking out, cooling to room temperature, washing with water to neutrality, carrying out suctionfiltration, and drying to obtain the ZSM-35 / EU-1 eutectic zeolite. The aromatic isomerization catalyst is prepared from the following components in percentage by weight: 10.0 to 80.0 percent of hydrogen type ZSM-35 / EU-1 eutectic zeolite, 15.0 to 90.0 percent of binding agent and 0.1 to 5.0 percent of VIIB group metal rhenium in the periodic table of elements. The catalyst can be applied to an ethylbenzene dealkylation type C8 aromatic hydrocarbon isomerization catalytic reaction process, and hydrogenation side reactions after ethylbenzene dealkylation are effectively reduced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an aromatic hydrocarbon isomerization catalyst. It can be applied to the xylene isomerization unit of the aromatics complex, isomerize the raffinate after separating the target product p-xylene (or o-xylene) into a product of xylene close to thermodynamic equilibrium, and at the same time part of the raw material Ethylbenzene is converted to benzene. Background technique

[0002] Since the boiling point of ethylbenzene is only 2.2°C different from that of PX, it is very difficult and uneconomical to separate ethylbenzene from xylene by rectification. Therefore, ethylbenzene must be converted during the xylene isomerization process. According to the different ways of ethylbenzene conversion, industrial C8 aromatics isomerization technology can be divided into two types: ethylbenzene conversion type and ethylbenzene dealkylation type. Ethylbenzene dealkylation-type C8 aromatics isomerization technology can reduce the investment...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More