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Atomizing molding method of TS-1 titanium silicalite molecular sieve catalyst

A titanium-silicon molecular sieve, TS-1 technology, used in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that the cavity cannot cause channel holes, and achieve extended service life, strong mechanical strength and The effect of abrasion resistance

Inactive Publication Date: 2013-03-27
DALIAN LIGONG QIWANGDA CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned pore-forming agents are either small in size and cannot form through-type pores, or they are granular substances that can only cause cavities but not channel pores.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Mix micron TS-1 molecular sieve powder, white carbon black powder and boric acid in proportion so that boric acid accounts for 0.2% of the molded product, and the silica content of the silica sol is 15% to make a uniform slurry. The catalyst was molded by hydrocarbon-ammonia column molding method, dried at 40°C for 3 hours, then dried at 100°C for 1 hour, and heated at a rate of 20°C / hour to 350°C in a nitrogen atmosphere with an oxygen content of 10%. Carry out roasting, obtain spherical catalyst product D, the ratio of its macropore volume to total pore volume has increased by 13.3% compared with product A, and its mechanical strength is tested as 12N.

Embodiment 2

[0042] Repeat Example 1, but change the amount of boric acid added to the mass fraction of TS-1 molecular sieve powder (dry basis) to 0.5%, 2%, 5%, and 10%, and other conditions are consistent with Example 1, and the obtained spherical catalyst product The ratio of macropore volume to total pore volume increased by 13.8%, 13.6%, 12.5%, and 11.9% compared with product A.

Embodiment 3

[0044] Repeat Example 1, but the heating rate of the calcination is 25°C / min, 40°C / min, 50°C / min, the calcination time is constant, and the ratio of the macropore volume of the obtained spherical catalyst product to the total pore volume is equivalent to that of product A.

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Abstract

The invention provides an atomizing molding method of a TS-1 titanium silicalite molecular sieve catalyst. The atomizing molding method is characterized by comprising the steps of preparing TS-1 raw powder, silica sol and boric acid into uniform slurry according to a ratio; adopting the atomizing molding method to mold the catalyst; and drying and roasting to obtain the TS-1 catalyst. In a molding process, the boric acid is introduced and the mechanical strength and the wear-resisting degree of the molded catalyst are improved after the catalyst is roasted; abrasion caused by impact and fluid flowing, which are generated in transportation, filling and utilization processes, can be effectively resisted; and according to the atomizing molding method, the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of petrochemical catalysts, and relates to a molding method of a titanium-silicon molecular sieve catalyst. Background technique [0002] Titanium silicalite-1 is a new heteroatom molecular sieve with MFI structure developed in the early 1980s, referred to as TS-1. TS-1 molecular sieve has great application potential in the field of selective oxidation. The following patents and publications describe applications of TS-1: [0003] Such as CN1376151A(2000-08-08), CN1314348A(2001-03-30), CN1387948A(2002-02-05), CN1534030A(2003-03-28), CN1651405A(2004-11-04), CN1769277A(2005- 11-14), CN1810772A(2006-01-24), CN101172970A(2007-10-12), Journal of Catalysis, 25(2004)49-54; Molecular Catalysis, 19(2005)7-11; Journal of Petroleum (Petroleum Processing ), 22(2006) 72-77; Applied catalysis A: General, 246(2003) 69-77; Journal of molecular catalysis A: c hrological, 210(2004) 171-178; Journal of molecular catalysis A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89
Inventor 郭洪臣胡阳贾玉华李海龙张立兴
Owner DALIAN LIGONG QIWANGDA CHEM TECH
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