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High density zeolites and their production

a technology of high density zeolites and zeolites, which is applied in the direction of detergent compounding agents, physical/chemical process catalysts, inorganic non-surface active detergent compositions, etc., can solve the problem of the limit to which such particles can be subdivided in this manner, and achieves improved loading capability, high efficiency, and improved performance.

Inactive Publication Date: 2002-04-04
HU PATRICK C +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The process effectively increases the loading capability of zeolite while improving its performance by reducing particle size and alkalinity, achieving up to 20% improvement in packing density and maintaining zeolite properties for end-use applications.

Problems solved by technology

However, there is a limit to which such particles can be subdivided in this manner.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples 1-3

[0051] Samples of commercial type-A zeolite filter cake received from a commercial production plant were homogenized with a high speed agitator to form a soft paste. A portion of the paste (2500 grams) was transferred to a Hobart mixer. A 10 wt % aqueous solution of a treating agent of this invention was sprayed onto the sample while agitating the sample in the mixer. Then 2500 grams of dry commercial zeolite powder from the same commercial plant was blended with the sample. The resultant blend was transferred to a twin-shell blender equipped with a high speed mixing bar. The powder / treated paste mixture was thoroughly mixed in the blender to form a "wet" powder. About 1000 grams of the wet powder was then dried in an oven, either under air or under a carbon dioxide environment, at 115.degree. C. for 8 hours. The dried zeolite was milled by passing it once through a conventional 6-inch diameter laboratory hammer mill. Three samples of treated type-A zeolite were formed in this manne...

example 4

[0054] In order to demonstrate the extraordinary improvement in packing capability of the zeolites of this invention as compared to the zeolites from which they are made, a series of tapping experiments were carried out. In these tests, 30-gram samples of zeolites to be tested were dropped into a 100 mL graduated glass cylinder. The cylinders were then placed on a tapping machine which slowly elevates the cylinder by a prescribed distance (approximately 1 inch) and then followed by a free-drop. Each such cycle is counted by the machine. At periodic intervals during the test, the volume of the cylinder contents is recorded. The samples tested in this manner were separate portions of the respective zeolites of Examples 1-3. For comparative purposes, samples of the commercial zeolite as received, and also after milling were subjected to this tapping procedure. The results of these experiments in terms of grams of zeolite powder per mL are summarized in Table 3. Thus the greater the den...

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Abstract

Novel synthetic zeolite compositions of extremely small particle sizes that have increased loading capability, and process technology for producing such compositions are described. So far as is presently known, it has never been possible to form such compositions heretofore. The process technology involves, inter alia, contacting the zeolite cake formed in its production with a specified type of treating agent and then subjecting the treated zeolite to physical subdivision.

Description

REFERENCE TO RELATED APPLICATION[0001] This application is a continuation-in-part of commonly owned, co-pending U.S. application Ser. No. 09 / 344,467, filed on Jun. 25, 1999.REFERENCE TO OTHER COMMONLY-OWNED APPLICATIONS[0002] Reference is also made to commonly-owned copending Application Ser. No. 09 / 430,856, filed Oct. 29, 1999; Ser. No. 09 / 657,830, filed Sep. 8, 2000; and Ser. No. 09 / 698,790, filed Oct. 27, 2000. The entire disclosures of each of the foregoing three (3) applications to the extent not in conflict with the present application, are incorporated herein by reference.[0003] Type-A zeolite has been used for many years as a major component in powder detergents. It has long been known in the art that if the zeolite has an alkalinity above normal, such higher alkalinity can be easily addressed by adjusting the acidic compounds in spray dry crutch operations.[0004] It is common practice to ship type-A zeolite in powder form to the detergent manufactures by railcar. A long sta...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J29/06B01J29/60C01B39/02C01B39/14
CPCB01J29/06C01B39/14C01B39/02B01J29/60
Inventor HU, PATRICK C.LANGLOIS, CONRAD J. JR.GOINS, DIXIE E.COURY, JOSEPH E.
Owner HU PATRICK C