Method for producing benzene aromatic hydrocarbon from crude benzole

A technology for benzene-based aromatics and crude benzene, which is applied in the production of bulk chemicals, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems of low yield of aromatic products and large loss of aromatics. , to achieve the effect of high yield, low equipment investment and high purity

Active Publication Date: 2007-01-24
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an unavoidable defect in these three crude benzene hydrogenation processes, that is, some aromatics in crude benzene are hydrogenated into naphthenes or alkanes, resulting in a large loss of aromatics and a low yield of aromatics products

Method used

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  • Method for producing benzene aromatic hydrocarbon from crude benzole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Crude benzene and catalytic heavy gasoline are mixed in a certain proportion, and their properties are shown in Table 1. After mixing with hydrogen, it enters the hydrogenation reactor 1. The reaction conditions are shown in Table 2. The catalyst is a molybdenum-nickel-tungsten-phosphorus hydrogenation catalyst. The gas-liquid mixture discharged from the hydrogenation reactor enters the gas-liquid separator 2, and the obtained liquid phase is called hydrogenation. The properties of hydrogen oil and hydrogenated oil are shown in Table 2.

[0027] Cut the hydrogenated oil into a distillate with a dry point less than 180°C, and send the distillate to the pre-hydrogenation reactor 4. The pre-hydrogenation reaction conditions are: temperature 320°C, hydrogen pressure 1.2MPa, liquid space velocity 2.0h -1 , the ratio of hydrogen to oil is 1200:1, and the catalyst is molybdenum-cobalt hydrogenation catalyst.

[0028] The pre-hydrogenated refined oil enters the reforming react...

Embodiment 2

[0034] Crude benzene and coker gasoline are mixed in a certain proportion, and their properties are shown in Table 4. See Table 5 for hydrogenation reaction conditions, properties and family composition of hydrogenated oil. Other reaction conditions, reaction steps are with embodiment 1. The properties of the reformate are shown in Table 6. The product properties are shown in Table 9.

[0035]

[0036] Test raw material

[0037] Test raw material

Embodiment 3

[0039] Crude benzene and catalytic diesel are mixed in a certain proportion, and the hydrogenated oil is cut to produce a distillate with a dry point of less than 180°C. The properties of the distillate and the hydrogenation reaction conditions are shown in Table 7. Other reaction conditions, reaction steps are with embodiment 1. The properties of the reformate are shown in Table 8. The product properties are shown in Table 9.

[0040] Test raw material

[0041] color / smell

[0042] project

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Abstract

The present invention relates to process of producing benzene series arene with crude benzole. Whole fraction crude benzole and other hydrocarbon oil are mixed, and the mixed oil is produced into high purity benzene, toluene and xylene through the process including hydrorefining, reforming, solvent extracting, distilling, rectifying and other steps. The present invention has the features of no arene loss, total arene yield over 100 %, high purity of arene products over 99.9 %, low S and N impurity content in arene products less than 1 ppm and long operation period of the processing apparatus. The present invention is especially suitable for use in refinery possessing hydrogenation equipment and reforming equipment.

Description

1. Technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for converting crude benzene by-produced in coal coking and coal gasification processes into petroleum-grade benzene, toluene and xylene in a petrochemical enterprise. 2. Background technology [0002] Benzene, toluene, and xylene are all important organic chemical basic raw materials, and they mainly come from petroleum processing. Crude benzene is a light distillate oil recovered from coal coking crude gas, and its main component is single-ring aromatic hydrocarbons. The content of benzene, toluene and xylene in crude benzene accounts for more than 90%, of which benzene accounts for about 70%, toluene 8%-25%, and xylene 2%-5%. Benzene, toluene, and xylene obtained from crude benzene can be used to make up for the shortage of benzene-based products in the market. [0003] At present, there are two main methods for producing benzene-series aromatics from crude benzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/148C07C7/08C07C15/04C07C15/06C07C15/08B01J23/28B01J23/75B01J23/755
CPCY02P20/52
Inventor 佘喜春朱方明李庆华郭朝辉
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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