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Middle fraction oil type hydrocracking catalyst

A middle distillate and hydrocracking technology, which is applied in molecular sieve catalysts, physical/chemical process catalysts, hydrocarbon oil cracking, etc., and can solve the problem of low reactivity

Active Publication Date: 2010-01-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN1123632C discloses a medium-oil type hydrocracking catalyst and its preparation and application. The catalyst uses amorphous silica-alumina and modified Y molecular sieve as the carrier, and Iran VGO as the raw material for evaluation. The reaction pressure is 15.7MPa and the volume space velocity is 0.92hr -1 , the volume ratio of hydrogen to oil is 1240:1, the reaction temperature is 404°C, the selectivity of medium oil is 83.9%, and the reactivity is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 4.000 grams of NaY molecular sieve (produced by Lanzhou Catalyst Factory, silicon-aluminum ratio 5.0, unit cell constant 2.468nm) and use 60ml concentration of 0.1M NH 4 NO 3 The aqueous solution was exchanged at 25°C for 6 hours, filtered, washed, and dried at 100°C for 10 hours. After repeated exchanges three times, hydrothermally treated at 800°C for 2 hours, then added 60ml of 0.1M nitric acid solution as a solvent, placed on a magnetic heating stirrer and heated to 100°C to reflux , and then drop 20ml of oxalic acid solution with a pH of 3 at a rate of 2ml / min for modification. After 6hr, the product was filtered with suction, washed to pH=7.0, and dried at 100°C for 16hr to obtain molecular sieve Y1. The SiO of the molecular sieve 2 / Al 2 o 3 The molar ratio is 14.46, the unit cell constant is 2.439nm, the infrared acid content is 0.393mmol / g, and the specific surface area is 601.6m 2 / g, the pore volume is 0.46ml / g.

Embodiment 2

[0034] Take by weighing 3.300 grams of tetraethylammonium hydroxide (Hangzhou Gelinda Chemical Reagent Co., Ltd. industrial product, concentration 35%), add 2.270 grams of H 2 O dilution, then add 0.264 grams of sodium metaaluminate (NaAlO 2 , Tianjin Jinke Institute of Fine Chemicals, chemically pure reagents, in which Al 2 o 3 45%) and 0.124 gram of sodium hydroxide (Beijing Chemical Reagent Factory, chemically pure reagent, purity>96%), dissolve to transparent solution at 70 ℃~80 ℃, add 5.000 gram of coarse-pore silica gel (Qingdao Ocean Chemical Co., Ltd., SiO 2 content 98%) and stir until uniform, the templating agent is uniformly distributed in the system, and the composition (by molar ratio) of each feed material of this synthesis system is: SiO 2 / Al 2 o 3 =70,TEA + / SiO 2 =0.096,Na 2 O / SiO 2 =0.033,OH - / SiO 2 =0.132,H 2 O / SiO 2 = 3.0. The homogeneously stirred material was transferred to a 50 ml autoclave, and crystallized at 140° C. for 18 hrs, followed...

example 3

[0036] The synthetic raw materials and specifications used in Example 3 are all the same as in Example 2, and the feed ratio is different due to the different silicon-aluminum ratios.

[0037] Weigh 3.570 g of tetraethylammonium hydroxide, add 2.090 g of H 2 Dilute with O, then add 0.185g of sodium metaaluminate and 0.140g of sodium hydroxide, dissolve to a transparent solution at 70°C to 80°C, add 5.000g of coarse-pore silica gel, stir until uniform, and the template is evenly distributed in the system State, the composition (by mole ratio) of each feed material of this synthetic system is: SiO 2 / Al 2 o 3 =100,TEA + / SiO 2 =0.104,Na 2 O / SiO 2 =0.031,OH - / SiO 2 =0.137,H 2 O / SiO 2 = 3.0. The homogeneously stirred material was transferred to a 50 ml autoclave, and crystallized at 140° C. for 18 hrs, followed by crystallization at 170° C. for 16 hrs. The obtained product is washed, filtered, dried, roasted and deammonized to obtain a β2 molecular sieve product.

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Abstract

The invention relates to a middle fraction oil type hydrocracking catalyst, which consists of amorphous silicon aluminum, alumina, adhesive, high-silicon Y and beta composite molecular sieve, VIB group metal oxide, VIII group metal oxide and IA group metal element. The catalyst is characterized in that a high-silicon beta molecular sieve efficiently synthesized by a plate micelle method and a modified Y molecular sieve are used as main acid components of the catalyst, and the IA group metal element is used for carrier modification, wherein the synthesis of the beta molecular sieve is characterized in that the beta molecular sieve is synthesized directly by one step and does not need post modification treatment; and the beta molecular sieve and the modified Y molecular sieve are compounded to play a good role in synergy and complementation and used for the heavy-oil hydrocracking catalyst. The catalyst shows high hydrocracking activity and middle fraction oil selectivity.

Description

technical field [0001] The invention relates to a hydrocracking catalyst containing composite molecular sieves and producing middle distillate oil. Background technique [0002] Hydrocracking technology is one of the important secondary processing methods for heavy oil lightening. Due to its wide range of processing raw materials, many types of products with good quality, high production flexibility and high yield of liquid products, it is widely used in refineries and play an important role in the production of clean fuels. At the same time, the worldwide demand for middle distillate oil continues to grow, and the requirements for oil product quality also continue to increase. The pressure on refineries to produce high-quality middle distillate oil products is increasing. Therefore, the medium-oil hydrocracking process capable of producing high-quality clean fuels has been more and more widely used, and the medium-oil hydrocracking catalyst is the core and key of this tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G47/16
Inventor 戴宝琴张学军王刚张志华潘惠芳刘欣梅田然于春梅孙发民赵野张庆武王甫村安东俊丁庆玉丛丽茹李淑杰王福生尹成红王东青马守涛吕倩
Owner PETROCHINA CO LTD
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