DLM-1 molecular sieve, process for preparing the same, and use thereof

Patent metadata

Field	Value
Publication number	US-12145137-B2
Application number	US-202017757998-A
Country	US
Kind code	B2
Filing date	Dec 24, 2020
Priority date	Dec 25, 2019
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A DLM-1 molecular sieve, a process for preparing the molecular sieve, and use thereof in treating an organic substance are provided. The DLM-1 molecular sieve is an Al-SBA-15 molecular sieve, and has a schematic chemical composition as represented by the formula “first oxide*second oxide”. The first oxide is silica, the second oxide is alumina, and the content by mass percent of alumina in the schematic chemical composition is 2% to 85%. The DLM-1 molecular sieve is suitable for the hydrodenitrogenation reaction of heavy distillate oil, and is favorable for improving the hydrodenitrogenation activity.

First claim

The invention claimed is:

1. A process for preparing a DLM-1 molecular sieve, which comprises a step of contacting an amorphous silica alumina, a P123 triblock copolymer and water under a crystallization condition to obtain a molecular sieve; and optionally, a step of calcining said obtained molecular sieve,
step 1) mixing an amorphous silica alumina and water to form a slurry;
step 2) formulating an acidic solution containing a P123 triblock copolymer; and
step 3) mixing the slurry and the acidic solution containing a P123 triblock copolymer under crystallization conditions to obtain the DLM-1 molecular sieve,
wherein in a mass ratio of the amorphous silica alumina, on a dry basis, to water is 10:90 to 30:70, in step 2), the acidic solution has a pH value of 1-5, a mass content of the P123 triblock copolymer in the acidic solution is 0.5% to 5.0%, and in step 3), a mass ratio of the slurry, on the dry basis of the amorphous silica alumina, to the acidic solution, based on said P123 triblock copolymer, is 0.5:1 to 5:1.

2. The process according to claim 1 , wherein the crystallization condition at least comprises a temperature of 80-120° C., preferably 90-110° C., a time of 10-35 hours, and the pH in the crystallization process of 2.0-5.0.

3. The process according to claim 1 , wherein the alumina mass content of the amorphous silica alumina, on a dry basis, is 10% or more and 85% or less, and/or, a specific surface area of the amorphous silica alumina is 400-650 m 2 /g, and/or,
a pore volume of the amorphous silica alumina is 0.52-1.8 mL/g, and/or,
a average pore diameter of the amorphous silica alumina is 6 nm to 12 nm, and/or,
an average particle size of the amorphous silica alumina is 15 μm to 150 μm, and/or,
a pore distribution of the amorphous silica alumina comprises: the pore volume of pores having a pore diameter of 4-15 nm is 85%-95% of the total pore volume, the pore volume of pores having a pore diameter of >15 nm is 5% or less of the total pore volume, and/or,
a water content of an amorphous silica alumina is 20-45 wt %, and/or,
a mass ratio of said amorphous silica alumina, on a dry basis, to the P123 triblock copolymer is 0.5:1 to 5:1.

4. The process according to claim 1 , wherein the amorphous silica alumina is an amorphous silica alumina dry gel in a powder form.

5. The process according to claim 2 , wherein the temperature is 90-110° C., the time is 16-24 hours, or the pH in the crystallization process is of 3.2-4.8.

6. The process according to claim 3 , wherein the alumina mass content of the amorphous silica alumina, on a dry basis, is 25% or more or 30% or more and 65% or less or 55% or less, and/or, the specific surface area of the amorphous silica alumina is 450-600 m 2 /g, and/or, the pore volume of the amorphous silica alumina is 0.85-1.5 mL/g, and/or, the average pore diameter of the amorphous silica alumina is 7 nm to 10 nm, and/or, the average particle size of the amorphous silica alumina is 40 μm to 60 μm, and/or, the water content of the amorphous silica alumina is 25-32 wt %, and/or, the mass ratio of the amorphous silica alumina, on a dry basis, to the P123 triblock copolymer is 1:1 to 5:1.

Assignees

• China Petroleum & Chem Corp
• Sinopec Dalian Res Inst Petroleum & Petrochemicals Co Ltd

Inventors

• Tang Zhaoji
• Fan Hongfei

Classifications

• B01J35/647

  2-50 nm · CPC title

• C10G47/20

  the catalyst containing other metals or compounds thereof · CPC title

• C10G45/12

  containing crystalline alumino-silicates, e.g. molecular sieves · CPC title

• C10G45/08

  in combination with chromium, molybdenum, or tungsten metals, or compounds thereof · CPC title

• B01J37/0203

  the impregnation liquid containing organic compounds · CPC title