Basische Aluminiumchloride

Kohlschütter, H. W.; Hantelmann, P.; Diener, K.; Schilling, Heinz-Dieter

doi:10.1002/zaac.19412480403

Cited by 33 publications

(6 citation statements)

References 9 publications

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“…At temperatures above 80°C they found only poorly Our continuous titration experiments show the pH curve to be partitioned into two plateaus by three pH jumps. These characteristics, in particular the observed second plateau, were also noticed by Hantelmann and Kohlschtitter (18) in 1941 and in the fifties by Denk and his co-workers (22)(23)(24). Unfortunately their studies received but scant attention.…”

Section: Structure Of Precipitatessupporting

confidence: 69%

“…It is in turn again succeeded by a second inclined platform. This second plateau, which rises more steeply than the first one, went unnoticed (or was undetectable) in continuous titration experiments reported by other authors (17)(18)(19). In curve B this platform begins at a pH value of 4.2 and in curve C at a slightly higher value of 4.5.…”

Section: Urea Decomposition Methods At 90°cmentioning

confidence: 76%

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Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Vermeulen

Geus

Stol

et al. 1975

Journal of Colloid and Interface Science

110

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Acidified aluminum nitrate solutions were fitrated with alkali (NaOH or KOH) over a temperature range of 24°C to 90°C. A homogeneous distribution of added base was achieved by: (i) in situ decomposition of urea (90°C); and (ii) a novel method involving injection through a capillary submerged in the agitated salt solution.The experimental pH curves are characterized by two plateaus (or platforms) separated by a steep jump in pH. These characteristic features were not previously observed in continuous titration experiments. This is especially true of the second platform, which begins at an OH/A1 ratio larger than 2.5. Stable colloidal solutions or gels are formed on traversing this plateau. The hydrolysis-precipitation behavior was also followed by light scattering and x-ray diffraction measurements.A qualitative picture of the neutralization process is developed.

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Section: Structure Of Precipitatessupporting

confidence: 69%

Section: Urea Decomposition Methods At 90°cmentioning

confidence: 76%

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Vermeulen

Geus

Stol

et al. 1975

Journal of Colloid and Interface Science

110

View full text Add to dashboard Cite

show abstract

“…Hydrochloric acid represents an aggressive environment for Al, particularly Al alloys [13,16,22]. After Al 2 O 3 penetration by Cl − , the dissolution process continues as follows:…”

Section: Hydrochloric Acidmentioning

confidence: 99%

Corrosion Sensor Development for Condition-Based Maintenance of Aircraft

Rinaldi

Huber

McIntosh

et al. 2012

International Journal of Aerospace Engineering

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Aircraft routinely operate in atmospheric environments that, over time, will impact their structural integrity. Material protection and selection schemes notwithstanding, recurrent exposure to chlorides, pollution, temperature gradients, and moisture provide the necessary electrochemical conditions for the development and profusion of corrosion in aircraft structures. For aircraft operators, this becomes an important safety matter as corrosion found in a given aircraft must be assumed to be present in all of that type of aircraft. This safety protocol and its associated unscheduled maintenance requirement drive up the operational costs of the fleet and limit the availability of the aircraft. Hence, there is an opportunity at present for developing novel sensing technologies and schemes to aid in shifting time-based maintenance schedules towards condition-based maintenance procedures. In this work, part of the ongoing development of a multiparameter integrated corrosion sensor is presented. It consists of carbon nanotube/polyaniline polymer sensors and commercial-off-the-shelf sensors. It is being developed primarily for monitoring environmental and material factors for the purpose of providing a means to more accurately assess the structural integrity of aerospace aluminium alloys through fusion of multiparameter sensor data. Preliminary experimental test results are presented for chloride ion concentration, hydrogen gas evolution, humidity variations, and material degradation.

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“…Poly aluminum chloride was produced at the laboratory by dissolving 2.7 grams of aluminum powder (99.9%) in 100 ml of boiled hydrochloric acid solution of 0.1N. The total normality of the reactant solution would be around 1 N (Kohlschutter et al 1942;Alcoa World Chemicals 2001).…”

Section: Polyaluminum Chloride Productionmentioning

confidence: 99%

Preparation and Usage of Polyaluminum Chloride as a Coagulating Agent

Al-Dawery

Al-Joubori

2012

Jou. Eng. Res.

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Three different coagulating agents, Iraqi-produced alum, Swedish-produced alum, and laboratory- produced polyaluminum chloride (PAC) were used to clarify samples taken from Iraqi river water. A laboratory rig was built to produce PAC from the reaction between hydrochloric acid and aluminum powder. The results after raw water treatment showed that the dosage of PAC required for treatment was 98% less than that of alum when it was applied to water at a low turbidity and almost 90% less in the case of much higher turbidity. The application of PAC produced rapidly forming flocs and more compact sludge compared to that of alum. However, there were no significant changes in the pH of the solution. From the results obtained, the PAC agent performed better compared to alum and might be considered a good alternative to alum for raw water and waste water treatment.

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Basische Aluminiumchloride

Cited by 33 publications

References 9 publications

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Corrosion Sensor Development for Condition-Based Maintenance of Aircraft

Preparation and Usage of Polyaluminum Chloride as a Coagulating Agent

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