IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0268163
(1994-06-27)
|
우선권정보 |
DE-4322781 (1993-07-08) |
발명자
/ 주소 |
- Czerny Thomas (Glashtten DEX) Jostes Rainer (Hattersheim DEX)
|
출원인 / 주소 |
- Varta Batterie Aktiengesellschaft (Hannover DEX 03)
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
0 |
초록
▼
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate and excess lead oxide, is returned directly to production of the active mass paste. The mother liquor,
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate and excess lead oxide, is returned directly to production of the active mass paste. The mother liquor, after a possible use as cleaning water, is subjected to another neutralization with lead oxide, separate from the wastewater received from the electrode washing procedure in view of its possible content of impurities. The resulting lead sulfate is sent to a metal-processing facility for recycling. The neutral mother liquor, after the removal of lead residues by conventional precipitation methods and filtration, is discharged as treated water.
대표청구항
▼
A process for the treatment of sulfuric acid wastewater accumulated during washing of charged electrodes, whereby a plurality of products, including active lead mass paste, processed effluent suitable for lead recycling and purified water, are separately obtained, the process comprising the steps of
A process for the treatment of sulfuric acid wastewater accumulated during washing of charged electrodes, whereby a plurality of products, including active lead mass paste, processed effluent suitable for lead recycling and purified water, are separately obtained, the process comprising the steps of neutralizing the sulfuric acid wastewater with an excess of lead oxide, thereby forming a neutralized precipitate of a tribasic or tetrabasic lead sulfate and excess lead oxide in an alkaline mother liquor, separating the lead sulfate together with the excess lead oxide, from the alkaline mother liquor and collecting the lead sulfate and the excess lead oxide as a mixture, as a first product, for production of an active lead mass paste, neutralizing the alkaline mother liquor with lead oxide, the step of neutralizing the mother liquor being conducted separate from, but, concurrent with, the step of neutralizing the sulfuric acid wastewater, thereby obtaining a neutralized mother liquor and effluent product, separating the neutralized mother liquor from the effluent product, processing the effluent product to obtain a mixture of lead sulfate and lead oxide, as a second product, while subjecting the neutralized mother liquor to a precipitation to obtain purified water, as a third product, thereby obtaining the plurality of products including, the active lead mass paste, the mixture of lead sulfate and lead oxide, and the purified water.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.