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Preparation method for low-quality diesel hydrofining catalyst

A technology for hydrorefining and inferior diesel oil, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of reducing product yield, excessive cracking of alkane components, etc. The effect of hydrogenation saturation and high cetane number

Active Publication Date: 2014-07-23
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
  • Preparation method for low-quality diesel hydrofining catalyst
  • Preparation method for low-quality diesel hydrofining catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

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

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

Embodiment -2

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

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

Embodiment -3

[0034] Mix 40.0g HP-SAPO-5 molecular sieve, 194.0g pseudoboehmite (dry basis content 72%), 20.0g SB powder (dry basis content 75%), 6.0g squash powder and 6.0g methylcellulose Put it into the kneader and knead for 15 minutes, add 205g of acidic solution prepared by water, nitric acid, and citric acid into the dry powder one by one, knead it until it can be extruded, and then squeeze it through an empty plate and a cylindrical orifice plate with a diameter of 8mm. One time, and finally formed into four-leaf clover strips with a diameter of 1.5mm; the obtained wet strips were first cured in an oven at 30°C for 24 hours, then dried in an oven at 120°C for 12 hours, and finally placed in a muffle furnace and the temperature was raised to 550°C for roasting After 4 hours, the vector ZT-1 was obtained.

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

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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. technical background [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 1 wt%. 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 Patents(China)
IPC IPC(8): B01J29/85B01J29/84C10G45/12
Inventor 杨建国肖寒石芳刘红光于海斌张国辉赵训志
Owner CHINA NAT OFFSHORE OIL CORP
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