# US 4,396,576 A · Alloy for occlusion of hydrogen

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- Number: US 4,396,576 A
- Document ID: US4396576A
- Status: Granted
- Kind: A
- Application number: 06/276,833
- Filed: 1981-06-24
- Granted: 1983-08-02
- Earliest claimed: 1980-07-04
- Assignees: Agency of Industrial Science and Technology; Ministry of International Trade & Industry
- Inventors: Yasuaki Osumi; Hiroshi Suzuki; Akihiko Kato; Keisuke Oguro; Masanori Nakane
- Web page: https://patentgrep.com/patent/US4396576A

## CPC

- F17C 11/00: Use of gas-solvents or gas-sorbents in vessels {(absorbing compositions for acetylene C10L3/04; absorbing compositions for hydrogen C01B3/0005)}
- C01B 3/0057: {and nickel}
- Y02E 60/32: Hydrogen storage
- Y10S 420/90: Hydrogen storage
- F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An alloy having a composition of the general formula, MmNi.sub.5-x A.sub.x-y B.sub.y, wherein Mm is misch metal, A is one member selected from the group consisting of Al, Cu, and Mn and B is one member selected from the group consisting of Al, Co, Cu, Fe, Mn, and Si, providing that both A and B do not represent one same compound, is useful for the occlusion of hydrogen.

## Claims

### Claim 1

A quaternary alloy for the occlusion of hydrogen under low pressure, exhibiting low dissociation pressure of hydride and high speed of hydrogen release, the alloy having a composition represented by the following general formula:
MmNi.sub.5-x A.sub.x-y B.sub.y
wherein, Mm stands for misch metal, A for one element selected from the group consisting of Al, Cu, and Mn, B for one element selected from the group consisting of Al, Co, Cu, Fe, Mn, and Si, x for a numerical value in the range of from 0.1 to 2, y for a numerical value in the range of from 0.01 to 1.99, providing that both A and B do not represent the same element and the numerical value of x is greater than that of y.

### Claim 2 (depends on 1)

The alloy according to claim 1, wherein A is an element selected from the group consisting of Al and Mn, B is an element selected from the group consisting of Al, Co, Fe, and Mn, x is a numerical value falling within the range of from 0.5 to 1.0, and y is a numerical value falling within the range of from 0.1 to 0.9.

### Claim 3 (depends on 1)

The alloy according to claim 1, wherein the misch metal is mainly composed of 25 to 35% by weight of lanthanum, 40 to 50% by weight of cerium, 1 to 15% by weight of praseodymium, 4 to 15% by weight of neodymium, 1 to 7% by weight of samarium+gadolinium, 0.1 to 5% by weight of iron, 0.1 to 1% by weight of silicon, 0.1 to 2% by weight of magnesium, and 0.1 to 1% by weight of aluminum.