Disposal and Utilization of Waste Acid with Special Reference to Waste Sulfuric Acid

A procedure is presented for detecting the more common vegetable gums in dairy products. Alginates are separated, in the presence of other gums, by precipitation as algenic acid and redissolving from the protein precipitate with a saturated solution of magnesium sulphate. Alginates are identified by their color reaction with ferric sulfuric acid reagent. The characteristics and test reactions to aid in the detection and differentiation of other gums are given. The various gums can be idenitied in concentrations as low as 0.1 gram per 100 grams of product.

Download Full-text

Inorganic ion compositions in the Ulvophyceae and the Rhodophyceae, with special reference to sulfuric acid ion accumulations

Phycological Research ◽

10.1111/j.1440-1835.2005.tb00360.x ◽

2005 ◽

Vol 53 (2) ◽

pp. 85-92 ◽

Cited By ~ 3

Author(s):

Hideaki Sasaki ◽

Akio Murakami ◽

Hiroshi Kawai

Keyword(s):

Sulfuric Acid ◽

Special Reference ◽

Inorganic Ion

Download Full-text

Cleaning Waste Sulfuric Acid from PVC Gas Analysis Scheme Design and Composition Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.675-677.280 ◽

2014 ◽

Vol 675-677 ◽

pp. 280-283

Author(s):

Xiao Ling Chen ◽

Kui Yu Gao ◽

Cheng Li

Keyword(s):

Sulfuric Acid ◽

Liquid Slag ◽

Weight Percent ◽

Solid Content ◽

Gas Analysis ◽

Composition Analysis ◽

Detection Scheme ◽

Scheme Design ◽

Analysis Scheme ◽

Waste Acid

HWasu Corporation produces an enormous amount of PVC acetylene gas to wash waste sulfuric acid every year, and the composition of waste acid impurity is complex. The stench restricts the reuse of waste sulfuric acid, This paper establishes the detection scheme which is divide int three parts,respectively: escaping of the exhaust gas, liquid slag washing and washing slag quantitative analysis.Burning waste acid solid content of 11.40%, light component is 97.18%, sulfuric acid content of 79.22%, after washing slag of weight percent is 7.30%, Washing liquid slag quality percentage of 4.10%.Escaping gases mainly contain acetylene, hydrogen chloride, sulfur oxide impurities. Washing slag liquids mainly contain phosphoric acid root, organophosphorus, chloride, calcium, magnesium,iron ions and sulfuric acid root ion. Washing slags mainly contain silicon dioxide, carbon, hydrogen, calcium oxide, magnesium oxide, ferric oxide,and etc. Finally through the balance calculation of data, We can figure out that the experimental data is accurate and reliable for comprehensive utilization of wast sulfuric acid to provide basic theory data.

Download Full-text

Preparation of Thin Cadmium Telluride Samples for Electron Microscope Studies

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052754 ◽

1974 ◽

Vol 32 ◽

pp. 548-549

Author(s):

T. J. Magee ◽

J. Peng ◽

J. Bean

Keyword(s):

Electron Microscope ◽

Sulfuric Acid ◽

Solid State ◽

Sample Preparation ◽

Cadmium Telluride ◽

Potassium Dichromate ◽

Optical Components ◽

The Past ◽

Solid State Devices

Cadmium telluride has become increasingly important in a number of technological applications, particularly in the area of laser-optical components and solid state devices, Microstructural characterizations of the material have in the past been somewhat limited because of the lack of suitable sample preparation and thinning techniques. Utilizing a modified jet thinning apparatus and a potassium dichromate-sulfuric acid thinning solution, a procedure has now been developed for obtaining thin contamination-free samples for TEM examination.

Download Full-text

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100093146 ◽

1976 ◽

Vol 34 ◽

pp. 636-637

Author(s):

R. E. Herfert ◽

N. T. McDevitt

Keyword(s):

Sulfuric Acid ◽

Salt Spray ◽

High Strength ◽

Environmental Stability ◽

Anodic Films ◽

Sodium Dichromate ◽

Corrosion Resistant ◽

Aerospace Applications ◽

Bond Strengths ◽

Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

Download Full-text