Slurry Bed Reaction Process for Aromatic Alkylation

A technology for alkylation and alkylation reaction of aromatic hydrocarbons, applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve problems such as serious side reactions of alkylation, low utilization rate of methanol, poor catalyst stability, etc., and achieve The effect of reducing reaction temperature rise, suppressing side reactions, and promoting heat transfer

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of serious alkylation side reactions, low methanol utilization rate and poor catalyst stability in the prior art, and provides a new slurry bed reaction method for alkylation of aromatic hydrocarbons, which has alkyl The advantages of less chemical side reactions, high utilization rate of methanol and high catalyst stability

Method used

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  • Slurry Bed Reaction Process for Aromatic Alkylation
  • Slurry Bed Reaction Process for Aromatic Alkylation
  • Slurry Bed Reaction Process for Aromatic Alkylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] in such as figure 1 In the reaction device shown, the geometric volume of the reactor is 10L, and the charging coefficient is 0.6. Toluene is used as the raw material of aromatic hydrocarbons, methanol is used as the alkylation reagent, and hydrogen is used as the circulating carrier gas. shape-selective methylation catalyst content for the alkylation reaction. Two hours after the reaction ran smoothly, samples were taken for analysis. The specific evaluation conditions and data results are listed in Table 1. The xylene selectivity in Table 1 refers to the ratio of xylene products in all aromatic products.

[0028] Table 1

[0029]

Embodiment 2

[0031] in such as figure 1 In the shown reaction device, the geometric volume of the reactor is 10L, and the charging coefficient is 0.6. Toluene is used as the aromatic hydrocarbon raw material, and methanol is used as the alkylation reagent. Alkylation reaction was carried out by changing the type of circulating carrier gas. Two hours after the reaction ran smoothly, samples were taken for analysis. The specific evaluation conditions and data results are listed in Table 2. The calculation method of each performance index is the same as Example 1.

[0032]Table 2

[0033]

Embodiment 3

[0035] in such as figure 1 In the reaction device shown, the geometric volume of the reactor is 10L, and the filling coefficient is 0.6. Toluene is used as the raw material of aromatic hydrocarbons, methanol is used as the alkylation reagent, and hydrogen is used as the circulating carrier gas. 5000g of toluene and 125g of shape-selective Methylation catalyst, change the ratio of toluene and methanol for alkylation reaction. Two hours after the reaction ran smoothly, samples were taken for analysis. The specific evaluation conditions and data results are listed in Table 3. The calculation method of each performance index is the same as Example 1.

[0036] table 3

[0037]

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Abstract

The invention relates to an aromatic hydrocarbon alkylation slurry bed reaction method, and mainly solves the technical problems of multiple side reactions, low utilization ratio of the alkylation reagent, poor catalyst stability and the like in the existing aromatic hydrocarbon alkylation production method. The method comprises the following steps: part of liquid aromatic hydrocarbons and an alkylation catalyst are premixed and arranged in a slurry bed reactor, and the gasified alkylation reagent and a carrier gas are together introduced into the slurry bed reactor through the reactor bottom to perform alkylation reaction; the liquid product is discharged via the lower part of the reactor and separated from the alkylation catalyst, and enters an aromatic hydrocarbon separation system, and meanwhile, the separated alkylation catalyst and a fresh aromatic hydrocarbon material are together introduced into the slurry bed reactor via the upper part to perform alkylation reaction; and low-carbon hydrocarbons generated after the reaction and the carrier gas are discharged via the top of the reactor and are separated, and the separated carrier gas is recycled. The technical scheme solves the problems of multiple side reactions, low utilization ratio of the alkylation reagent, catalyst deactivation and the like, and can be used in industrial production of the alkylated aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a slurry bed reaction method for alkylation of aromatic hydrocarbons. Background technique [0002] As an important basic petrochemical raw material, p-xylene is widely used in the fields of polyester fiber, medicine, pesticide, dyestuff and solvent. Due to the excellent performance and rapid development of polyester fiber, it has already leapt to the top of synthetic fibers, and it is expected to have greater development in the future. According to statistics, the worldwide annual demand growth rate of p-xylene, which is the main raw material of polyester products, has exceeded the annual growth rate of GNP, reaching 8.5%. It is estimated that the annual production capacity of p-xylene will increase by 14 million tons in the next 10 years To meet the global demand for polyester products. At present, the most commonly used p-xylene production method in industry is disproportionation of toluene and transalkylation of C9 aromat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/08C07C2/86B01J29/40B01J29/70
CPCY02P20/52
Inventor 孔德金夏建超邹薇姜丽燕
Owner CHINA PETROLEUM & CHEM CORP
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