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Preparation method for low-quality diesel hydrofining catalyst

A technology for hydrofining and low-quality diesel oil, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as lower product yield and excessive cracking of alkane components, so as to prevent excessive cracking and promote Effect of hydrogenation saturation and excellent isomerization activity

Active Publication Date: 2013-01-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fly in the ointment is that the acidity of silica-alumina zeolite is too strong, and when it is used in diesel hydrogenation catalyst, it will cause excessive cracking of alkane components and reduce the yield of its products

Method used

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  • Preparation method for low-quality diesel hydrofining catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

[0022] Add 27.2 g of phosphoric acid to 86.4 g of deionized water and mix evenly, add 18.6 g of pseudo-boehmite, mix and react for a certain period of time, add 14.8 g of template agent triethylamine (TEA) and 5.0 g of acidic silica sol, mix evenly to form After the sol, add 25 g of 10 wt.% hexadecyltrimethoxyorganosilane ammonium chloride (TPHAC) ethanol solution to the above-mentioned sol system, and transfer the sol to the polytetrafluoroethylene reactor, at 185 o C. Constant temperature crystallization in a rotating oven for 16 h. The product is centrifuged, washed and dried to obtain the original SAPO-5 sub-sieve powder. Raw powder after 580 o C was calcined for 6 h to obtain a SAPO-5 molecular sieve with hierarchical channels, labeled as HP-SAPO-5.

[0023] Replace 5.0 g of acidic silica sol with 6.4 g of manganese oxalate, the crystallization time is 36 h, and the other reaction conditions are uniformly synthesized to obtain HI-SAPO-5, and the Mn-APO-5 molecular sieve...

Embodiment -2

[0027] Add 29.4 g of phosphoric acid to 93.3 g of deionized water and mix evenly, add 20.5 g of pseudo-boehmite, mix uniformly and react for a certain period of time, add 17.8 g of template agent triethylamine (TEA) and 5.9 g of acidic silica sol, mix evenly to form After the sol, the TPHAC ethanol solution of 25 g 10 wt.% was added in the above-mentioned sol system, and the sol was transferred to the polytetrafluoroethylene reactor, at 180 o C. Constant temperature crystallization in a rotating oven for 24 h. The product is centrifuged, washed and dried to obtain the original SAPO-11 sub-sieve powder. Raw powder after 600 o C was calcined for 6 h to obtain a SAPO-11 molecular sieve with hierarchical channels, labeled as HP-SAPO-11.

[0028] Replace 5.0 g of acidic silica sol with 7.5 g of cobalt oxalate, the crystallization time is 60 h, and the other reaction conditions are uniformly synthesized to obtain HI-SAPO-11, and the Co-APO-11 molecular sieve with multi-level chann...

Embodiment -3

[0034] Mix 40.0 g HP-SAPO-5 molecular sieve, 194.0 g pseudoboehmite (dry basis content 72%), 20.0 g SB powder (dry basis content 75%), 6.0 g squid powder and 6.0 g methylcellulose Then put it into the kneader and mix for 15 minutes, add 205 g of acidic solution prepared by water, nitric acid, and citric acid into the dry powder one by one, first mix and knead until it can be squeezed into a paste, and then pass through an empty plate and a cylindrical orifice plate with a diameter of 8 mm. Each is extruded once, and finally formed into a four-leaf clover strip with a diameter of 1.5 mm; o C oven for 24 h, and then at 120 o C in an oven for 12 h, and finally placed in a muffle furnace and programmed to heat up to 550 o C was calcined for 4 h to obtain the carrier ZT-1.

[0035] Dissolve 4.0 g of citric acid, 35.0 g of nickel nitrate hexahydrate, 40.0 g of ammonium metatungstate, and 24.0 g of ammonium heptamolybdate in 60 mL of deionized water, and dilute the impregnation sol...

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Abstract

The invention discloses a preparation method for a low-quality diesel hydrofining catalyst, which is characterized in that the low-quality diesel hydrofining catalyst comprises an active component, a carrier and an additive; the active component is composed of one or more than one metal of both VIB group and VIII group; the carrier is composed of a multi-orifice AFI, an AEL molecular sieve and a Gamma-Al2O3; the additive is one or more than one of SiO2, TiO2, F and P; and the weight contents of the components are respectively as follows: 5-30 wt percent of the multi-orifice AFI and the AEL molecular sieve, 12-25 wt percent of metals of the VIB group, 3-15 wt percent of metals of the VIII group, 0-15 wt percent of additive, and the balance Gamma-Al2o3. According to the method, the specific surface area is 200-300 m<2> / g, the pore size is 0.30-0.80 cm<3> / g, the average pore diameter is 6-15 nm, and the mechanical strength is not lower than 15 N / mm.

Description

technical field [0001] The invention relates to the technical field of catalysts, and relates to a preparation method of a low-quality diesel hydrofinishing catalyst, in particular to the preparation and application of a diesel hydrofinishing catalyst containing multi-stage porous molecular sieves. Background technique [0002] With the increasingly heavy and inferior crude oil in the world, at the same time, environmental protection regulations are increasingly light and clean diesel standards, especially the requirements for the content of sulfur and polycyclic aromatic hydrocarbons in diesel. In the future, the sulfur content in diesel will be lower than 10 μg / g, or even sulfur-free, and the content of polycyclic aromatic hydrocarbons will be lower than 1wt%. The production of clean diesel oil with low sulfur, low aromatics and high cetane number has become an urgent task for the petroleum processing industry. The development of deep hydrodesulfurization and dearomatizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J29/84C10G45/12
Inventor 杨建国肖寒石芳刘红光于海滨张国辉赵训志
Owner CHINA NAT OFFSHORE OIL CORP
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