Using ceramic membranes to recycle two nonionic alkaline metal-cleaning solutions

Chen, Abraham S. C.; Stencel, Nicholas; Ferguson, David

doi:10.1016/s0376-7388(99)00146-5

Cited by 4 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After each recycling run an a p p ropriate amount of a surfactant additive, such as Tu rco 4215-NCLT NI Additive, which is composed of 20% DGME, 25% AGE, 50% NPE, and <5% MBT, was used to replenish the recycled bath. The additive composition was very similar to that of the organic constituents in Tu rco 4215-NCLT, as determined using a gas chromatographic (GC) method developed for the previous bench-scale study [12].…”

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 71%

“…The membrane, however, also removed almost all nonionic surfactants (i.e., alkylpolyoxyalkylene glycol ether [AGE] and nonylphenolpolyethylene glycol ether [NPE]) [12]. Removal of these surfactants re q u i re s proper replenishment to the recycled solutions, which adds complexity and cost to the full-scale operation of this recycling process.…”

Section: Note: Mention Of Trade Names or Commercial Pro Ducts Does Nomentioning

confidence: 99%

“…The cleaner product tested was Tu rco 4215-NCLT, which is a white granular mix purported to be an exclusively nonionic cleaner for low-foaming or nonfoaming immersion cleaning [12][13]. For immersion parts washing in Tank C1-1, a solution of about 90 g/L (12 oz/gal) at about 60° C (140° F) was maintained under constant agitation.…”

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 99%

“…For immersion parts washing in Tank C1-1, a solution of about 90 g/L (12 oz/gal) at about 60° C (140° F) was maintained under constant agitation. Other information about the p roduct can be found in the previously published bench-scale paper [12]. After each recycling run an a p p ropriate amount of a surfactant additive, such as Tu rco 4215-NCLT NI Additive, which is composed of 20% DGME, 25% AGE, 50% NPE, and <5% MBT, was used to replenish the recycled bath.…”

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 99%

“…We recently reported [12] that a 0.05 µm ZrO2 u l t r afilter (7 mm i.d. x 750 mm-long tubular filter manufact u red by U.S. Filter) effectively removed O&G, including one synthetic ester oil, two polyalphaolefin (PAO)-based oils and greases, and two petroleum hydro c a rbon-based oils and greases, from two alkaline cleaning solutions (i.e., Tu rc o ® 4 2 1 5 -N C LT and Daraclean ® 282) containing nonionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Recycling a nonionic aqueous‐based metal‐cleaning solution with a ceramic membrane: Pilot‐scale evaluation

2001

View full text Add to dashboard Cite

I N T R O D U C T I O NAqueous alkaline cleaning solutions have been commonly used for metal cleaning since the phase-out of o rganic solvent vapor degreasers [1][2][3][4][5][6][7][8]. The cleaning solutions usually are composed of alkaline builders, surfactants, co-solvents, and additives that pro m o t e / enhance detergency and longevity of the solutions. Over time, the cleaning solutions can become contaminated with oil and grease (O&G) and suspended solids, and must be recycled or disposed of as hazardous wastes. Various recycling technologies exist, but few p roduce usable recycled products [7,[9][10][11].We recently reported [12] that a 0.05 µm ZrO2 u l t r afilter (7 mm i.d. x 750 mm-long tubular filter manufact u red by U.S. Filter) effectively removed O&G, including one synthetic ester oil, two polyalphaolefin (PAO)-based oils and greases, and two petroleum hydro c a rbon-based oils and greases, from two alkaline cleaning solutions (i.e., Tu rc o ® 4 2 1 5 -N C LT and Daraclean ® 282) containing nonionic surfactants. The O&G concentrations were reduced from >10,000 mg/L to near or below analytical limits of quantification. The ZrO2 membrane was effectively cleaned after repeated use during more than 13 test runs for a total run time of over 50 hours, as indicated by restoration of its clean water permeability (CWP) (i.e., permeability to 0.2 µm m e m b r a n e -p re f i l t e red deionized water) to gre a t e r than 75% of the initial value. Furtherm o re, the membrane allowed nearly complete passage of all alkaline salts; a co-solvent, diethylene glycol monobutyl ether (DGME); a corrosion inhibitor, 2-merc a p t o b e n z o t h i azole (MBT); and an unknown organic constituent. Note: Mention of trade names or commercial pro ducts does not constitute endorsement or re c o m m e n d ation for use.The membrane, however, also removed almost all nonionic surfactants (i.e., alkylpolyoxyalkylene glycol ether [AGE] and nonylphenolpolyethylene glycol ether [NPE]) [12]. Removal of these surfactants re q u i re s proper replenishment to the recycled solutions, which adds complexity and cost to the full-scale operation of this recycling process. Also, information pertinent to the system integration (e.g., batch vs. on-line) and p e rf o rmance of re c y c l e d / replenished baths for metal

show abstract

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 71%

Section: Note: Mention Of Trade Names or Commercial Pro Ducts Does Nomentioning

confidence: 99%

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 99%

Section: Cleaner Product and Cleaning Bathmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations