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Coked naphtha desilicification catalyst, and preparation method thereof

A technology for coking naphtha and catalyst is applied in the field of coking naphtha desiliconization catalyst and its preparation, and can solve the problems of decreased main refining activity, shortened operation period, waste of resources and the like

Active Publication Date: 2018-08-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cyclosiloxane is a poison in the main refining agent of coker gasoline, and long-term accumulation leads to a decrease in the activity of the main refining agent and shortens the operation cycle
[0004] Most domestic coking naphtha hydrogenation units do not use desiliconization catalysts, but use regular replacement of the main catalyst, resulting in waste of resources

Method used

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  • Coked naphtha desilicification catalyst, and preparation method thereof
  • Coked naphtha desilicification catalyst, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Get 200g pseudo-boehmite, add n-butyl titanate 1.4g (weight is expressed as TiO 2 meter), lanthanum nitrate 1.4g (weight is La 2 o 3meter), graphene 0.14g, mix well. Add 1.6g of scallop powder, mix evenly, dropwise add an aqueous solution containing 0.8g of nitric acid and 0.8g of citric acid, knead, extrude into a cylindrical strip of 1.5mm, freeze-dry, and then roast at 550°C for 4h to make a carrier. Then impregnate with an equal volume of impregnating solution prepared by nickel nitrate and ammonium molybdate, freeze-dry, and roast at 450°C for 6 hours to obtain catalyst A.

Embodiment 2

[0043] Get 200g pseudo-boehmite, add metatitanic acid 10g (weight is based on TiO 2 meter), lanthanum nitrate 10g (weight in La 2 o 3 meter), graphene 1g, and mix well. Add 8g of safflower powder, mix evenly, add dropwise an aqueous solution containing 4g of nitric acid and 4g of citric acid, knead, extrude into a clover shape of 1.5mm, freeze-dry, and then roast at 550°C for 4h to make a carrier. Then impregnate with an equal volume of impregnating solution prepared by nickel nitrate and ammonium molybdate, freeze-dry, and roast at 550°C for 4 hours to obtain catalyst B.

Embodiment 3

[0045] Get 200g pseudo-boehmite, add n-butyl titanate 10g (weight is expressed as TiO 2 meter), lanthanum nitrate 10g (weight in La 2 o 3 meter), graphene 1g, and mix well. Add 8g of safflower powder, mix evenly, add dropwise an aqueous solution containing 4g of nitric acid and 4g of citric acid, knead, extrude into a clover shape of 1.5mm, freeze-dry, and then roast at 550°C for 4h to make a carrier. Then impregnate with an equal volume of impregnating solution prepared by nickel nitrate and ammonium molybdate, freeze-dry, and calcinate at 550°C for 4 hours to obtain catalyst C.

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PUM

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Abstract

The invention discloses a coked naphtha desilicification catalyst. The coked naphtha desilicification catalyst comprises a carrier and main active metals; the main active metals are loaded onto the carrier; Ni and Mo are taken as the main active metals; Al2O3-TiO2-La2O3-graphene composite oxide is taken as the carrier; the specific surface area of the coked naphtha desilicification catalyst rangesfrom 250 to 500m2 / g, the pore volume ranges from 0.5 to 0.8mL / g. The invention also relates to a preparation method of the coked naphtha desilicification catalyst. The coked naphtha desilicificationcatalyst possesses a specific pore diameter, is large in pore volume, is capable of realizing high efficiency removing of organosilicon in coked naphtha, and is capable of protecting main hydrofinishing agents.

Description

technical field [0001] The invention relates to a coking naphtha desiliconization catalyst and a preparation method thereof, which is suitable for the desiliconization agent protecting the main refining agent in the coking naphtha hydrofining process in the petroleum refining field, and is used in the coking naphtha fraction Silicone removal. Background technique [0002] The silicon-containing defoamer is added in the delayed coking process, and the silicon-containing defoamer generates cyclosiloxane at high temperature, resulting in a high content of silicon in its product, coking naphtha. [0003] Cyclosiloxane is a poison in the main refiner of coker gasoline, and its long-term accumulation leads to the decrease of the activity of the main refiner and the shortening of the operation period. [0004] Most domestic coker naphtha hydrogenation units do not use desiliconization catalysts, but use regular replacement of the main catalyst, resulting in waste of resources. C...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J35/10B01J37/02C10G45/08
CPCC10G45/08B01J23/8871B01J37/0018B01J37/0201C10G2300/202C10G2300/70B01J35/635B01J35/615
Inventor 徐铁钢马宝利王丹温广明宋金鹤方磊谭明伟徐伟池王磊田然张全国丛丽茹孙发民王刚郭金涛郭立艳李彩霞宫福斌李实韩崇豹周世豪
Owner PETROCHINA CO LTD