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First-stage selective hydrogenation catalyst for pyrolysis gasoline

A technology for pyrolysis gasoline and catalysts, applied in refining to remove heteroatoms, etc., can solve the problem of low selectivity of diene hydrogenation, achieve the effect of improving selectivity, improving the utilization rate of palladium, and suppressing side reactions

Inactive Publication Date: 2005-09-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcoming of low diene hydrogenation selectivity when single-component metal palladium is used in the previous literature, and to provide a new catalyst for one-stage selective hydrogenation of pyrolysis gasoline

Method used

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  • First-stage selective hydrogenation catalyst for pyrolysis gasoline

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Comparison scheme
Effect test

Embodiment 1～3

[0012] Pre-soak the carrier with deionized water, then filter to dry the water, impregnate the carrier with palladium chloride solution, then wash, dry, and roast in the air to obtain the catalyst A, B or C of the present invention respectively, and its physical properties are as shown in the table 1.

[0013] Table 1

[0014]

Embodiment 4

[0016] Carry out activity evaluation in 30 milliliters of isothermal trickle bed reactors with A, B, C catalyst described in embodiment 1~3 respectively, evaluation condition is: catalyst loading is 30 milliliters (bed height is 23.5~ 25 cm), the reaction pressure is 2.7-2.8MPa, the bath temperature is 52-56°C, and the raw material is C 5 ~C 9 Distillate, liquid space velocity 8.0 hours -1 , the hydrogen / oil ratio (volume / volume) is 60:1, and the inlet temperature is 44-45°C. The evaluation results are shown in Table 2.

[0017]

[0018] *g iodine / 100g oil

Embodiment 5

[0020] Carry out 1000 hour evaluations in 100 milliliters of adiabatic trickle-bed reactors with the B catalyst of embodiment 2, evaluation condition is: catalyst loading is 100 milliliters (bed height is 30 centimetres), reaction pressure is 2.7~2.8MPa, bath Temperature is 52~56℃, raw material is C 5 ~C 9 Distillate, fresh oil space velocity 3.0 hours -1 (volume), circulating oil space velocity is 8.8 hours -1 (volume), raw material is fresh oil plus circulating oil, hydrogen / fresh oil (volume / volume) = 110:1, inlet temperature is 44-45°C, see evaluation results table 3.

[0021] Cumulative reverse

[0022] *g iodine / 100g oil

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Abstract

The present invention relates to a catalyst for pyrolysis gasoline one-stage selective hydrogenation. Said invention utilizes the adoption of loading palladium on delta-phase alumina carrier, in which the pore volume of the carrier is 0.6-0.9 ml / g, specific surface area is 140-170 sq.m / g and the thickness of catalyst shell layer is 0.03-0.09 mm.

Description

technical field [0001] The invention relates to a catalyst for one-stage selective hydrogenation of pyrolysis gasoline. Background technique [0002] Pyrolysis gasoline is a liquid by-product C when light oil (naphtha, gas oil, etc.) is cracked to produce ethylene and propylene 5 ~C 10 The general term for fractions. The composition of pyrolysis gasoline is very complex, mainly including benzene, toluene, xylene, mono-olefins, di-olefins, straight-chain alkanes, cycloalkanes and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., a total of more than 200 components, of which Benzene, toluene, and xylene (collectively referred to as BTX) are about 50-80% aromatics, and 25-30% unsaturated hydrocarbons. Industrial production mainly cuts C 6 ~C 8 The distillate undergoes one-stage selective hydrogenation to remove highly unsaturated hydrocarbons, such as chain conjugated dienes, styrene, and cyclic conjugated diene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04
Inventor 刘仲能周生虎侯闽渤谢在库朱海燕
Owner CHINA PETROLEUM & CHEM CORP
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