pyrolysis gasoline c 6 -c 8 Distillate hydrotreating catalyst and preparation method

A C6-C8, pyrolysis gasoline technology, applied in the field of pyrolysis gasoline second-stage refining treatment catalyst and preparation, can solve the problems of poor catalyst stability, low catalyst hydrogenation activity, and reduced catalyst activity selectivity, etc.

Active Publication Date: 2021-06-29
泉州市利泰石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1353168A discloses a catalyst suitable for the second-stage hydrofining of pyrolysis gasoline and its preparation method. The alumina precursor is used to add a high polymer and the IV subgroup metal to obtain a molded carrier after drying and roasting. Immerse in ammonia co-impregnation solution containing Mo, Co, and Ni active components, dry at 100-120°C, and activate at 400-700°C in air to obtain a catalyst, which can adjust the acidity and alkalinity of the carrier and inhibit the coking and deactivation speed of the catalyst. The low specific surface area of ​​the carrier leads to low hydrogenation activity of the catalyst
And pyrolysis gasoline when using Al 2 o 3 When used as a carrier, in the process of reducing nickel ions at high temperature, it is easy to cause the formation of nickel aluminate, thereby reducing the catalyst activity selectivity and poor catalyst stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1, prepare nickel-doped ferrite

[0020] Under stirring, 2.51 mol of nitrate was dissolved in 120 ml of water, and the mixture was dissolved in citric acid; then 4.79 mol iron nitrate was added, then 190 g of polyacrylate, then the aqueous solution containing 42 g of nickel nitrate was added, and stirring was stirred for 30 min. Dry, calcinate, ground to obtain ferrite.

[0021] 2, prepare silicon oxide-alumina support

[0022] 4.5 g of nickel doped ferride was added to citric acid alternate. 300 g of a thin aluminum powder and 25.0 g of Tianjing powder were added to the kneader, add nitric acid, add 40.2 g of the nitrate solution of polyacrylate, and mix well, then add nickel doped ferrite, mix well, obtained Alumina precursor. 5g of sodium polyacrylate is dissolved in nitric acid, then add 38 g of silicon fine powder and 50 g of a thin aluminum stone powder, stir well, to obtain a silicon fine powder-placed aqueous aluminum stone-polyacrylate mixture (briefly silicon-alum...

Embodiment 2

[0026] Preparation of nickel doped ferride, only 260 g of sodium polyacrylate, silicon oxide-alumina support, is added to Example 1, silicon oxide-alumina support contains 4.4% by weight silicon oxide, 5.7 wt % Nickel doped ferrite, 1.2 wt% magnesium, carrier mesh hole accounts for 63.8% of the total hole, and the large hole accounts for 25.9% of the total hole. Sodium polyacrylate in an alumina precursor is 3 times higher than sodium polyacrylate than the silicon source-organic polymer mixture. The method of preparing the catalyst 2 is in Example 1, the catalyst 2 molybdenum oxide content is 21.3%, the cobalt oxide content is 0.2%, the nickel oxide content is 4.2%, the potassium oxide content is 0.2%, the silicon oxide-alumina support content is 73.8 wt. %.

Embodiment 3

[0028] Preparation of nickel doped ferride, only 220 g of polyacrylic acid, silicon oxide-alumina support, the silicon oxide-alumina carrier contains 8.4% by weight of silica, 2.6% by weight Nickel doped ferrite, 2.1 wt% magnesium, carrier mesh hole accounts for 54.9% of the total hole, and the large hole accounts for 33.1% of the total hole. The unit content of the unit content of the alumina precursor is 3.3 times higher than the content of polyacrylic acid in the silicon source - organic polymer mixture. The method of preparing the catalyst 3 is in Example 1, the catalyst 3 molybdenum oxide content is 11.7%, the cobalt oxide content is 1.2%, the nickel oxide content is 7.1%, the potassium oxide content is 1.7%, the silicon oxide-alumina support content is 78.3 wt %.

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Abstract

The present invention relates to a kind of pyrolysis gasoline C 6 -C 8 Distillate hydrotreating catalyst, the catalyst uses molybdenum, cobalt, nickel, and potassium as active components, and uses silica-alumina as a carrier. Based on the total weight of the catalyst, the catalyst contains 6-22% of molybdenum oxide and 0.1-2.2% of cobalt oxide , nickel oxide 4.0-7.2%, potassium oxide content 0.1-3.0%, silica-alumina carrier content 75-88wt%, carrier mesopores account for 3-70% of total pores, macropores account for 1.5- 55%. The catalyst has good anti-colloid ability, strong anti-arsenic, anti-sulfur, and strong anti-water ability.

Description

Technical field [0001] The present invention relates to the field of refining chemicals, and is a 2-stage refining treatment catalyst and preparation method for cleavage gasoline. Background technique [0002] With the increase of ethylene production capacity, ethylene by-product cracking gasoline also increases, and cleave gasoline comprises C5-C10 fraction. The treatment of cleavage gasoline fractions is generally used in two cases of AC, and the lysis of gasoline is a selective hydrogenation, and the purpose is to generate the active component (such as alkyne, bisolehydrocarbons and alkylanyl aromatic hydrocarbons). The corresponding monoolefin and alkyl aromatic hydrocarbon use noble metal hydrogenation catalyst or non-metal Ni-based catalyst to saturate these active unsaturated components in the oil at lower temperatures to reduce the focus of the second catalyst bed, thereby To ensure the operation cycle of the device, the second section employs a non-precious metal catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01J35/04C10G45/08
CPCB01J23/002B01J23/8872B01J35/04B01J2523/00C10G45/08C10G2300/1037B01J2523/13B01J2523/22B01J2523/31B01J2523/3706B01J2523/41B01J2523/68B01J2523/842B01J2523/847
Inventor 陈明海施清彩陈新忠庄旭森
Owner 泉州市利泰石化科技有限公司
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