Modification method for improving catalytic activity of Y-type molecular sieve

A catalytic activity, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, catalytic cracking, etc., can solve problems such as affecting the catalytic activity of molecular sieves, unfavorable cracking of oil and gas molecules, blocking molecular sieve pores, etc., to improve patency and facilitate industrial production. , the effect of improving catalytic activity

Active Publication Date: 2019-02-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this patent, rare earth compounds and phosphorus compounds are added in the molecular sieve modification process, which is easy to form precipitates and deposit on the outer surface of the molecular sieve and block the pores of the molecular sieve, which is not conducive to the cracking of oil and gas molecules by the acid centers in the pores, and affects the catalytic activity of the molecular sieve.

Method used

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  • Modification method for improving catalytic activity of Y-type molecular sieve
  • Modification method for improving catalytic activity of Y-type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Get 300 grams of rare earth ultra-stable Y (dry basis), after beating with 1500 grams of deionized water, add 3 grams of diammonium hydrogen phosphate (in terms of phosphorus), and stir evenly; refinement treatment, the particle diameter of more than 90% of the molecular sieve slurry is If it is less than 3 μm, adjust the pH value to 4.0, raise the temperature to 75°C, and react for 2 hours, then add 2.3 grams of magnesium chloride (calculated as magnesium) to the above slurry for mixing and beating, and react at 95°C for 1 hour to obtain the modified molecular sieve Y1.

Embodiment 2

[0021] Get 300 grams of rare earth Y (dry basis), after beating with 600 grams of deionized water, add 0.3 grams of phosphoric acid (calculated as phosphorus), and stir evenly; refine treatment, the particle diameter of more than 90% of the molecular sieve slurry is less than 0.06 μm, adjust The pH value was 3.1, the temperature was raised to 90°C, and reacted for 1 hour, then 6 grams of magnesium nitrate (calculated as magnesium) was added to the above slurry for mixing and beating, and reacted at 100°C for 3 hours to obtain the modified molecular sieve Y2.

Embodiment 3

[0023] Get 172 grams of hydrogen Y (dry basis) and 128 grams of ultra-stable Y (dry basis), after beating with 1800 grams of deionized water, add 1.5 grams of ammonium phosphate (calculated as phosphorus) and 1.7 grams of phosphoric acid (calculated as phosphorus), stir Uniform; refinement treatment, the particle diameter of more than 90% of the molecular sieve slurry is less than 5 μm, adjust the pH value to 3.5, heat up to 50 ° C, react for 5 hours, then add 0.3 grams of magnesium sulfate (calculated as magnesium) and 0.3 gram of magnesium chloride (calculated as magnesium) was mixed and beaten, and reacted at 60° C. for 1.5 hours to obtain modified molecular sieve Y3.

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Abstract

The invention provides a modification method for improving the catalytic activity of a Y-type molecular sieve. The modification method comprises the following steps: adding a phosphorus-containing compound into Y-type molecular sieve slurry and mixing and pulping; carrying out refining treatment; then adjusting the pH (Potential of Hydrogen) value of the slurry and raising the temperature and reacting; finally, adding a magnesium-containing compound into the mixed slurry, and mixing and pulping; raising the temperature and exchanging to obtain the modified Y-type molecular sieve. By adopting the modification method, the catalytic activity and a pore structure of the molecular sieve can be remarkably improved and the process only needs a two-step exchange technology; high-temperature roasting is not needed; a modification process is simple and industrial production is easy to realize.

Description

technical field [0001] The invention relates to a modification method of a Y-type molecular sieve, and more specifically relates to a modification method for improving the catalytic activity of a Y-type molecular sieve. Background technique [0002] Fluid catalytic cracking technology (FCC) has become an important means of secondary processing of heavy oil due to its relatively low investment, strong feedstock adaptability, and simple operation. During the catalytic cracking process, the catalytic activity of the Y-type molecular sieve in the catalyst is likely to decrease, resulting in a decrease in the processing capacity of the device and a deterioration in product distribution. In order to maintain the catalytic activity of the balancer, the refinery maintains the conversion rate of the unit by increasing the unit consumption of fresh catalyst, resulting in an increase in the processing cost of the unit. [0003] In order to improve the catalytic activity of Y-type mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/084B01J2229/18C10G11/05
Inventor 张海涛潘志爽袁程远谭争国高雄厚张忠东李雪礼段宏昌黄校亮黄世英郑云锋孙书红张向阳
Owner PETROCHINA CO LTD
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