Hydrogenation method of C9 < + > fraction for pyrolysis gasoline

A pyrolysis gasoline and distillate technology, which is applied in the field of hydrogenation of pyrolysis gasoline, can solve the problems of poor hydrogenation effect, achieve the effects of reducing energy consumption, reducing difficulty, and avoiding polymerization reactions

Active Publication Date: 2020-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its one-stage hydrogenation treatment, the hydrogenation effect is poor, and it is difficult to apply to cracking C with high colloid content. 9 + in the hydrogenation process

Method used

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  • Hydrogenation method of C9 &lt; + &gt; fraction for pyrolysis gasoline
  • Hydrogenation method of C9 &lt; + &gt; fraction for pyrolysis gasoline
  • Hydrogenation method of C9 &lt; + &gt; fraction for pyrolysis gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Step A. Preparation of the first catalyst

[0057] a) Al 2 O 3 / TiO 2 Preparation of composite oxide carrier

[0058] Take the specific surface area as 160m 2 / g, the pore volume is 0.58ml / g, the most probable pore size is 170g of clover alumina, placed in 106ml of tetraethyl titanate in cyclohexane (the mass concentration of tetraethyl titanate is 0.808ml / g), stirred for 15 minutes and dried at 120°C for 6 hours , Then calcined at 600°C for 4 hours to obtain Al 2 O 3 / TiO 2 Composite oxide support (named Z1). Among them, TiO 2 The content is 15.0%.

[0059] b) Load of active ingredients

[0060] Take 100g of the Z1 prepared in step a), and place it in 50ml of nickel nitrate aqueous solution (the mass concentration of nickel nitrate is 24g / 100ml in terms of nickel atoms) and immerse it for 2h. After dehydration treatment with compressed air for 20min, at 110 Drying at °C for 8 hours, and then calcining at 550 °C for 5 hours to prepare the first catalyst precursor (named NZ1)...

Embodiment 2

[0086] Step A. Preparation of the first catalyst

[0087] a) Al 2 O 3 / TiO 2 Preparation of composite oxide carrier

[0088] Take the specific surface area as 160m 2 / g, the pore volume is 0.58ml / g, the most probable pore size is 170g of clover alumina, placed in 100ml of tetraethyl titanate in cyclohexane (the mass concentration of tetraethyl titanate is 0.490ml / g), stirred for 15 minutes and dried at 120°C for 6 hours , Then calcined at 600°C for 4 hours to obtain Al 2 O 3 / TiO 2 Composite oxide support (named Z3). Among them, TiO 2 The content is 24.3%.

[0089] b) Load of active ingredients

[0090] Take 100g of the Z2 prepared in step a), and place it in 50ml of nickel nitrate aqueous solution (the mass concentration of nickel nitrate is 20g / 100ml in terms of nickel atoms) and soak for 2h. After dehydration treatment with compressed air for 20min, Drying at °C for 8 hours, and then calcining at 550 °C for 5 hours to prepare the first catalyst precursor (named NZ3).

[0091] Tak...

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Abstract

The invention discloses a hydrogenation method of a C9 < + > fraction for pyrolysis gasoline. By utilizing a hydrogenation process of carrying out staged hydrogenation and enabling one part of a firstproduct flow to be recycled back to a first reactor and one part of a second product flow to be respectively recycled back to a colloid separation tower, a first reactor and a second reactor, and cooperatively using a catalyst with high low-temperature activity, the operation stability of the device and the hydrogenation activity of the catalyst are improved. According to the method, the export bromine value of the finally prepared hydrogenation product can be reduced to below 3g bromine/100g oil, the export diene value reaches 0g iodine/100g oil, and the sulfur content is reduced to below 3mg/kg.

Description

Technical field [0001] The invention relates to the field of pyrolysis gasoline hydrogenation, in particular to a C for pyrolysis gasoline 9 + Hydrogenation method of distillate. Background technique [0002] Pyrolysis gasoline is the most important by-product produced during the production of ethylene, and its production is about 50% of ethylene production. Pyrolysis gasoline is the main source of aromatic hydrocarbons, and its composition contains about 50% aromatic hydrocarbons. C of pyrolysis gasoline 9 + Distillate (ie, hydrocarbons with C9 and above in pyrolysis gasoline, referred to as pyrolysis C 9 + The mass fraction of) is about 10%-20% of the ethylene output. In recent years, with the rapid development of my country’s petrochemical industry, especially the increase in ethylene production capacity, cracking C 9 + The output is increasing continuously. The full and reasonable utilization of this part of resources will have a significant impact on the improvement of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202
Inventor 杜周熊凯纪玉国张富春季静李正艳任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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