US4239655A
Expired / Lapsed
US
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Process for the production of bonded zeolite bodies
Assignee: Toray Industries Inc
•
Filing: 1979-06-05
•
Granted: 1980-12-16
•
Expires: 1999-06-05
Abstract
Abstract Bonded zeolite bodies are produced from a mixture of zeolite, polycarboxylic acid and water.
Inventors
- 👤 Takehisa Inoue
- 👤 Kazuo Tsunoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
49 words
A process for the production of bonded zeolite bodies which comprises mixing zeolite with water and polycarboxylic acid having at least two carboxyl groups and not more than ten carbon atoms except those of carboxyl groups, forming the mixture into shaped bodies, and drying and calcining the shaped bodies.
Claim 2
Dependent Claim
49 words
A process for the production of bonded zeolite bodies which comprises mixing zeolite with water and polycarboxylic acid having at least two carboxyl groups and not more than ten carbon atoms except those of carboxyl groups, forming the mixture into shaped bodies, and drying and calcining the shaped bodies.
Claim 3
Dependent Claim
24 words
The process as described in claim 1 wherein said polycarboxylic acid is used in an amount of about 1-10 wt.% based on the zeolite.
Claim 4
Dependent Claim
26 words
The process as described in claim 1 wherein water is used in an amount of about 10-60 wt.% based on the total weight of the mixture.
Claim 5
Dependent Claim
14 words
The process as described in claim 1 wherein said polycarboxylic acid is hydroxy-polycarboxylic acid.
Claim 6
Dependent Claim
14 words
The process as described in claim 3 wherein said hydroxy-polycarboxylic acid is citric acid.
Claim 7
Dependent Claim
14 words
The process as described in claim 3 wherein said hydroxy-polycarboxylic acid is tartaric acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |