Sulfamic Acid Cleaning of Electron Tube Parts

2009 ◽  
pp. 162-162-4
Author(s):  
Robert W. Etter
Keyword(s):  
Sulfamic Acid ◽  
Electron Tube ◽  
Acid Cleaning

The Scaling Preventable Measures of Multi-Effect Distillation Plants

2014 ◽  
Vol 955-959 ◽  
pp. 605-609
Author(s):  
Ming Luo ◽  
Shu Zhong Wang ◽  
Jian Ping Yang
Keyword(s):  
Heat Recovery ◽  
Sulfamic Acid ◽  
Scale Inhibitor ◽  
Scale Removal ◽  
Acid Cleaning ◽  
Scale Inhibition ◽  
Liaohe Oilfield ◽  
Removal Technology ◽  
Removal Technologies ◽  
Performance Scale

The multi-effect distillation (MED) process is one of the oldest process in desalination of seawater. This technology has been used for water and heat recovery from the petroleum waste in Liaohe Oilfield. However, the scale formation is one of the main problems that encountered in the operation of different plants. The temperature of the first stage of the MED evaporation is higher than 138 °C. Therefore, both the scale inhibition and removal technologies should be adopted. The Belgard EV 2050 scale inhibitor produced by Ciba-Geigy is recommended to be used to inhibit the scale due to the excellent scale inhibiting performance. Scale removal technology also needs to be adopted regularly for device descaling in addition to the scale controlling technology. The sulfamic acid (concentration of 5% -10%) can be selected as the acid cleaning agent with a certain amount of inhibitor added.

scholarly journals Sulfamic Acid Cleaning Solution for 4,4′-Methylene-bis-orthochloroaniline (MOCA)

AIHAJ ◽  
1975 ◽  
Vol 36 (3) ◽  
pp. 181-186 ◽  
Author(s):  
C. R. SCHMITT ◽  
G. W. CAGLE
Keyword(s):  
Sulfamic Acid ◽  
Acid Cleaning ◽  
Cleaning Solution

Corrosion behavior of additive manufactured Ti-6Al-4V in sulfamic acid cleaning solution

2021 ◽  
Vol 45 (6) ◽  
pp. 2967-2973
Author(s):  
Wenbin Qiu ◽  
Yongqiang Wei ◽  
Aijun Chen ◽  
Hao Deng ◽  
Lvjun Zhou ◽  
...  
Keyword(s):  
Phase Composition ◽  
Corrosion Behavior ◽  
Sulfamic Acid ◽  
Acid Cleaning ◽  
Cleaning Solution ◽  
Corrosion Behaviors

The specific microstructural features and phase composition lead to different corrosion behaviors of SPS and additive manufactured Ti-6Al-4V alloys.

Comparison of Acrylamide and Agar Gels by Freeze-Etching

1977 ◽  
Vol 35 ◽  
pp. 606-607
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe
Keyword(s):  
Electron Microscope ◽  
Sodium Hydroxide ◽  
Sodium Hypochlorite ◽  
Chromic Acid ◽  
Distilled Water ◽  
Thin Sheets ◽  
Acid Cleaning ◽  
Agar Gels ◽  
Freeze Etching ◽  
Water Cut

Thin sheets of acrylamide and agar gels of different concentrations were prepared and washed in distilled water, cut into pieces of appropriate size to fit into complementary freeze-etch specimen holders (1) and rapidly frozen. Freeze-etching was accomplished in a modified Denton DFE-2 freeze-etch unit on a DV-503 vacuum evaporator.* All samples were etched for 10 min. at -98°C then re-cooled to -150°C for deposition of Pt-C shadow- and C replica-films. Acrylamide gels were dissolved in Chlorox (5.251 sodium hypochlorite) containing 101 sodium hydroxide, whereas agar gels dissolved rapidly in the commonly used chromic acid cleaning solutions. Replicas were picked up on grids with thin Foimvar support films and stereo electron micrographs were obtained with a JEM-100 B electron microscope equipped with a 60° goniometer stage.Characteristic differences between gels of different concentrations (Figs. 1 and 2) were sufficiently pronounced to convince us that the structures observed are real and not the result of freezing artifacts.

High Resolution Stereography of Complementary Freeze-Fracture Replicas Reveals the Presence of Depressions Opposite Membrane Associated Particles of Split Membranes

1971 ◽  
Vol 29 ◽  
pp. 442-443
Author(s):  
Russell L. Steere
Keyword(s):  
High Resolution ◽  
Cardiac Muscle ◽  
Electron Micrographs ◽  
Chromic Acid ◽  
Freeze Fracture ◽  
Distilled Water ◽  
Fine Scale ◽  
Acid Cleaning ◽  
Cleaning Solution

Complementary replicas have revealed the fact that the two common faces observed in electron micrographs of freeze-fracture and freeze-etch specimens are complementary to each other and are thus the new faces of a split membrane rather than the original inner and outer surfaces (1, 2 and personal observations). The big question raised by published electron micrographs is why do we not see depressions in the complementary face opposite membrane-associated particles? Reports have appeared indicating that some depressions do appear but complementarity on such a fine scale has yet to be shown.Dog cardiac muscle was perfused with glutaraldehyde, washed in distilled water, then transferred to 30% glycerol (material furnished by Dr. Joaquim Sommer, Duke Univ., and VA Hospital, Durham, N.C.). Small strips were freeze-fractured in a Denton Vacuum DFE-2 Freeze-Etch Unit with complementary replica tooling. Replicas were cleaned in chromic acid cleaning solution, then washed in 4 changes of distilled water and mounted on opposite sides of the center wire of a Formvar-coated grid.

Identification of acid-insoluble filter-plugging compounds and optimal acid-washing procedures for tubular backpulse pressure filters

TAPPI Journal ◽  
2011 ◽  
Vol 10 (1) ◽  
pp. 17-23
Author(s):  
KEVIN TAYLOR ◽  
RICH ADDERLY ◽  
GAVIN BAXTER
Keyword(s):  
Calcium Sulfate ◽  
Membrane Filter ◽  
Sulfamic Acid ◽  
Xrd Analysis ◽  
Metal Sulfides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gypsum Formation ◽  
Acid Washing ◽  
Hydrolysis Of

Over time, performance of tubular backpulse pressure filters in kraft mills deteriorates, even with regular acid washing. Unscheduled filter replacement due to filter plugging results in significant costs and may result in mill downtime. We identified acid-insoluble filter-plugging materials by scanning electron microscope/energy-dispersion X-ray spectroscopy (SEM/EDS) and X-ray diffraction (XRD) analysis in both polypropylene and Gore-Tex™ membrane filter socks. The major filter-plugging components were calcium sulfate (gypsum), calcium phosphate (hydroxylapatite), aluminosilicate clays, metal sulfides, and carbon. We carried out detailed sample analysis of both the standard acid-washing procedure and a modified procedure. Filter plugging by gypsum and metal sulfides appeared to occur because of the acid-washing procedure. Gypsum formation on the filter resulted from significant hydrolysis of sulfamic acid solution at temperatures greater than 130°F. Modification of the acid-washing procedure greatly reduced the amount of gypsum and addition of a surfactant to the acid reduced wash time and mobilized some of the carbon from the filter. With surfactant, acid washing was 95% complete after 40 min.

Determination of Most Effective Acid Cleaning Methodfor Reuse of Waste Ark Shell

2019 ◽  
Vol 20 (3) ◽  
pp. 147-152
Author(s):  
Ha Na Seo ◽  
Yu Gyung Kim ◽  
Yeong Seon Park ◽  
Byeong Wook Kong ◽  
Deog Gwan Ra ◽  
...  
Keyword(s):  
Acid Cleaning ◽  
Ark Shell
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