[특허]Manganese dioxide

Manganese dioxide 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-004/88 C01G-045/02
출원번호	US-0024596 (1979-03-28)
발명자 / 주소	Mellors Geoffrey W. (North Royalton OH) Sheffield Glenn W. (Strongsville OH)
출원인 / 주소	Union Carbide Corporation (New York NY 02)
인용정보	피인용 횟수 : 38 인용 특허 : 0

초록

A homogeneous manganese dioxide composition having on a microscopic scale domains of alpha and delta manganese dioxide is manufactured by reacting a manganese-oxygen containing composition with a sodium containing composition at elevated temperature followed by acid treatment.

대표청구항 ▼

A method for producing a manganese dioxide composition for use as a battery cathode depolarizer comprising homogeneous manganese dioxide having domains of alpha and delta manganese dioxide as determined by X-ray diffraction patterns showing, at an intensity of I/I of 10 or more, “d”lines with at least the following values: about 6.91 to about 7.27, about 4.90 to about 4.98, about 2.40 to about 2.46 and about 1.41 to about 1.43, and having a combined sodium content of about 0.1 to about 2.0% by weight on a dry basis; and having sufficient electrochemical activity as a battery depolarizer according to the Kozawa and Powers test procedure to exhibit a voltage against a standard calomel electrode of at least +0.2 volt after a 30 milliamperehour discharge comprising the steps of: (a) reacting a sodium containing composition selected from the group consisting of sodium hydroxide, sodium carbonate, sodium oxide and mixtures thereof with a manganese-oxygen containing composition of a temperature in the range of from about 200°C. to about 600°C., in the mole ratio of sodium to manganese in the range of from about 0.3:1.0 to about 4.0:1.0; and (b) treating the reaction product with an aqueous acid in a concentration and amount sufficient to decrease the sodium content of the final manganese dioxide composition to an amount in the range of from about 0.1 to about 2.0% by weight on a dry basis. A manganese dioxide composition for use as a battery cathode depolarizer comprising homogeneous manganese dioxide having domains of alpha and delta manganese dioxide as determined by X-ray diffraction patterns showing, at an intensity of I/I. of 10 or more, “d”lines with at least the following values: about 6.91 to about 7.27, about 4.90 to about 4.98, about 2.40 to about 2.46 and about 1.41 to about 1.43, and having a combined sodium content of about 0.1 to about 2.0% by weight on a dry basis; and having sufficient electrochemical activity as a battery depolarizer according to the Kozawa and Powers test procedure to exhibit a voltage against a standard calomel electrode of at least +0.2 volt after a 30 milliamperehour discharge.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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이 특허를 인용한 특허 (38)

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