Process for making improved zeolite catalysts from peptized aluminas

一种氧化铝、胶溶化的技术，应用在物理/化学过程催化剂、分子筛催化剂、化学仪器和方法等方向，能够解决沸石结构塌陷表面积、损失、裂化活性损失等问题

Active Publication Date: 2012-11-21
WR GRACE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, it is believed that lower pH values ​​in catalyst preparation slurries containing peptized alumina lead to leaching of alumina from the silica-alumina structure of the zeolite, thereby causing collapse of the zeolite structure and loss of surface area
Loss of surface leads to loss of cracking activity, thus requiring more frequent replacement of catalyst stocks

Method used

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  • Process for making improved zeolite catalysts from peptized aluminas
  • Process for making improved zeolite catalysts from peptized aluminas
  • Process for making improved zeolite catalysts from peptized aluminas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Catalyst 1 was prepared from the above yttrium solution and peptized alumina. Add 4735 grams (1141 g on a dry basis) of washed aqueous solution of USY zeolite, 9375 grams (1500 g on a dry basis) of peptized alumina, 625 grams (250 g on a dry basis) of colloidal dioxide Silicon, 2353 grams (2000 g on a dry basis) of clay, and 322 grams (73 g on a dry basis) of yttrium solution were mixed for about 10 minutes. The mixture was ground in a Drais mill to reduce particle size and spray dried in a Bowen spray dryer at an inlet temperature of 343°C. The spray dryer feed solids content was about 30% by weight. The spray-dried particles were calcined at 399°C. The calcined particles were then washed to reduce Na in the water bath 2 O, then filtered and rinsed with deionized water.

Embodiment 2

[0087] Catalyst 2 was prepared from the same lanthanum solution and peptized alumina as above. Add 4735 grams (1141 g on a dry basis) of washed aqueous solution of USY zeolite, 9375 grams (1500 g on a dry basis) of peptized alumina, 625 grams (250 g on a dry basis) of colloidal dioxide Silicon, 2353 grams (2000 g on a dry basis) of clay, and 389 grams (105 g on a dry basis) of the lanthanum solution were mixed for about 10 minutes. The mixture was ground in a Drais mill to reduce particle size and spray dried in a Bowen spray dryer at an inlet temperature of 343°C. The spray dryer feed solids content was about 30% by weight. The spray-dried particles were calcined at 399°C. Then, the calcined particles were washed to reduce Na in aqueous solution 2 O, then filtered and rinsed with deionized water.

Embodiment 3

[0089] Catalyst 3 was prepared from the yttrium solution described above and commercially available boehmite alumina. Add 5856 grams (1558 g, on a dry basis) of an aqueous solution of sodium subcarbonate USY zeolite, 3478 grams (800 g, on a dry basis) of polyaluminum chloride, and 947 grams (500 g, on a dry basis) of boehmite Alumina, 2471 grams (2100 g on a dry basis) of clay and 307 grams (70 g on a dry basis) of yttrium solution were mixed for about 10 minutes. The mixture was milled in a Drais mill to reduce particle size and spray dried in a Bowen spray dryer at an inlet temperature of 343°C. The spray dryer feed fixed content was about 38% by weight. The spray-dried particles were calcined at 593°C for 1 hour.

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Abstract

This invention relates to a process of preparing a catalyst from zeolite and peptized alumina. The invention comprises adding a yttrium compound to the zeolite, either prior to, during, or after its combination with the peptized alumina. The yttrium compound can be added to the zeolite via exchange of yttrium onto the zeolite prior to addition of peptized alumina, or the yttrium can be added as a soluble salt during the combination of the zeolite and peptized alumina. In either embodiment, the zeolite catalyst is then formed from the zeolite, yttrium and peptized alumina, optionally containing other inorganic oxide. This invention is suitable for preparing fluid cracking catalysts.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 61 / 315,304, filed March 18, 2010, the disclosure of which is hereby incorporated herein by reference. field of invention [0003] The present invention relates to a method for preparing zeolite-containing catalysts using peptized alumina. The method relates in particular to the preparation of catalysts suitable for use in fluid catalytic cracking processes. The invention also relates to reducing the loss of zeolite surface area and improving attrition resistance when the catalyst is used in a fluid catalytic cracking process. Background of the invention [0004] Catalytic cracking is a petroleum refining process that is commercially used on a very large scale. Most petroleum refined products are produced using the fluid catalytic cracking (FCC) process. The FCC process generally involves the cracking of heavy hydrocarbon feedstocks into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/06
CPCC10G11/18B01J35/002C10G11/05B01J2229/18B01J29/084B01J37/02B01J29/06B01J37/0045B01J29/061B01J29/088B01J2229/183B01J2229/42B01J35/30B01J29/405B01J37/0009B01J29/082B01J29/7049
Inventor Y.舒R.F.沃姆斯贝彻尔W-C.程
Owner WR GRACE & CO
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