|
US4332687A
(en)
*
|
1978-09-21 |
1982-06-01 |
Pca International, Inc. |
Removal of complexed heavy metals from waste effluents
|
|
US4257986A
(en)
*
|
1979-02-02 |
1981-03-24 |
Air Products And Chemicals, Inc. |
Process for refining aqueous acid mixtures utilized in nitration of aromatics
|
|
JPS5832003A
(ja)
*
|
1981-08-13 |
1983-02-24 |
Mitsubishi Metal Corp |
着色濃硫酸の脱色方法
|
|
US4406760A
(en)
*
|
1981-11-25 |
1983-09-27 |
Exxon Research & Engineering Co. |
Electrolytic process for treating sulfuric acid streams
|
|
GB2110681B
(en)
*
|
1981-11-25 |
1985-08-07 |
Exxon Research Engineering Co |
Process for treating spent sulfuric acid streams from the olefin hydration reaction
|
|
SE464299B
(sv)
*
|
1988-11-16 |
1991-04-08 |
Boliden Contech Ab |
Foerfarande foer avfaergning av svavelsyra framstaelld enligt kontaktmetoden
|
|
EP0378873B1
(en)
*
|
1988-12-16 |
1993-02-03 |
ENICHEM SYNTHESIS S.p.A. |
Regeneration of exhausted sulfuric acid by means of hydrogen peroxide
|
|
DE3903661C2
(de)
*
|
1989-02-08 |
1999-02-04 |
Wolff Walsrode Ag |
Verfahren zur Aufbereitung von Salpeter- und Schwefelsäure enthaltender Abfallsäure aus der Cellulosenitratherstellung
|
|
IT1248696B
(it)
*
|
1990-06-05 |
1995-01-26 |
Enichem Sintesi |
Procedimento per la rigenerazione mediante acqua ossigenata di acido solforico spento da reazioni di nitrazione
|
|
US5124051A
(en)
*
|
1990-11-29 |
1992-06-23 |
Solarchem Enterprises Inc. |
Process for treatment of contaminated waste water or groundwater
|
|
FR2674843B1
(fr)
*
|
1991-04-04 |
1993-09-17 |
Emc Services |
Procede et dispositif de purification d'acide sulfurique concentre contamine par des impuretes organiques.
|
|
FR2687656B1
(fr)
*
|
1992-02-20 |
1994-06-17 |
Inst Francais Du Petrole |
Procede d'elimination des matieres organiques contenues dans un acide sulfurique impur. utilisation de l'acide resultant et traitement de l'effluent gazeux forme.
|
|
US5275701A
(en)
|
1993-03-15 |
1994-01-04 |
Air Products And Chemicals, Inc. |
Process for purification and concentration of sulfuric acid
|
|
SE503793C2
(sv)
*
|
1995-02-01 |
1996-09-09 |
Kvaerner Pulping Tech |
Förfarande vid behandling av kondensat
|
|
ES2105969B1
(es)
*
|
1995-07-14 |
1998-07-01 |
Gen Quimica S A |
Procedimiento para la recuperacion de acido sulfurico a partir de corrientes residuales de sulfurico de mediana concentracion contaminadas con materia organica.
|
|
DE19614642C2
(de)
*
|
1996-02-22 |
2002-05-16 |
Mcw Mueller Chemikalien Wertst |
Verfahren zur Aufarbeitung von Abfall-Schwefelsäure
|
|
CA2254612A1
(en)
*
|
1996-09-06 |
2000-05-27 |
Bayer Aktiengesellschaft |
A process for purifying and concentrating spent sulphuric acids
|
|
DE19636191B4
(de)
*
|
1996-08-02 |
2008-04-03 |
Bayer Materialscience Ag |
Verfahren zur Reinigung und Aufkonzentrierung von gebrauchten Schwefelsäuren
|
|
FR2772014B1
(fr)
*
|
1997-12-08 |
2000-01-07 |
Atochem Elf Sa |
Generation de trifluorure de bore et d'acide sulfurique a partir d'hydrate de trifluorure de bore
|
|
US7360550B2
(en)
*
|
2002-04-05 |
2008-04-22 |
Sony Corporation |
System for recycling spent sulfuric acid, method for recycling spent sulfuric waste liquid, and recycled sulfuric acid
|
|
US20060065542A1
(en)
*
|
2004-09-30 |
2006-03-30 |
Nemeth Laszlo T |
Synthesis of hydrogen peroxide
|
|
US7273599B2
(en)
*
|
2005-04-22 |
2007-09-25 |
Servicios Industriales Penoles S.A. De C.V. |
Method for decoloring sulfuric acid
|
|
JP4576312B2
(ja)
*
|
2005-10-03 |
2010-11-04 |
東北電力株式会社 |
四フッ化ケイ素の製造方法、及びそれに用いる製造装置
|
|
DE102005049084A1
(de)
*
|
2005-10-13 |
2007-04-26 |
Wacker Chemie Ag |
Verfahren zur Regenerierung von Schwefelsäure
|
|
DE102006022447A1
(de)
*
|
2006-05-13 |
2007-11-15 |
Bayer Materialscience Ag |
Verfahren zur gekoppelten Herstellung von Chlor und Isocyanaten
|
|
EP2053147A1
(en)
*
|
2007-10-23 |
2009-04-29 |
Teijin Aramid B.V. |
Method for spinning and washing aramid fiber and recovering sulfuric acid
|
|
JP2013095640A
(ja)
*
|
2011-11-01 |
2013-05-20 |
Mitsubishi Gas Chemical Co Inc |
有機物を含有する硫酸を連続的に再生する方法
|
|
TWI481550B
(zh)
|
2013-05-01 |
2015-04-21 |
Asia Union Electronic Chemical Corp |
高純度硫酸溶液之製備方法
|
|
US9278860B2
(en)
*
|
2014-07-22 |
2016-03-08 |
Taiwan Semiconductor Manufacturing Co., Ltd. |
Method and apparatus for recycling waste sulfuric acid
|
|
IL236365A0
(en)
*
|
2014-12-21 |
2015-04-30 |
Melodea Ltd |
Recycling of acid from acid-rich aqueous solutions
|
|
DE102020002434B4
(de)
|
2020-04-23 |
2022-09-01 |
Pfaudler Normag Systems GmbH |
Verfahren zur Reduzierung des Wasserstoffperoxid-Verbrauchs bei der Reinigung von mit organischen Verbindungen verunreinigter Abfallschwefelsäure durch oxidative Behandlung
|
|
CN112194103A
(zh)
*
|
2020-09-30 |
2021-01-08 |
宜宾海丰和锐有限公司 |
一种除去乙炔清净废硫酸臭味的方法
|
|
CN113045427A
(zh)
*
|
2021-03-19 |
2021-06-29 |
宁夏华御化工有限公司 |
能够降低废水中硝酸盐含量的硝基氯苯制备方法及系统
|