Solvents for cleaning

What IS a good solvent for cleaning equipment used to produce your product ... 

Acetone is an effective solvent for cleaning traces of sulfur chlorides from reaction vessels, but care is necessary, as the reaction is vigorous if more than a trace is present. 

Seddon, K. R., Room-temperature ionic liquids—neoteric solvents for clean catalysis, Kinet. Catal., 1996, 37(5), 693-697 Seddon, K. R. Room-temperature ionic liquids— neoteric solvents for clean catalysis, Kinet. Katal, 1996, 37(5), 743-748. 

Uses. Aerosol propellant refrigerant and blowing agent solvent for cleaning and degreasing... 

Uses. Solvent for cleaning electronic equipment and degreasing of machinery refrigerant dry cleaning agent... 

In the Trauzl test, the mixture produced an expansion of 24 cc./gram, which is indicative of a high energy reaction. Card gap tests were also positive the value at room temperature is approximately 25 cards. From these results it was concluded that a mixture of methylene chloride with nitrogen tetroxide constitutes a definite explosive hazard. This conclusion was not immediately apparent as a result of compatibility and impact testing alone. Methylene chloride was not recommended as a solvent for cleaning N2O4 systems instead, a water flush is used for this operation. 

Solvents for cleaning of painting equipment are widely used in the Egyptian industry, especially the automotive, pharmaceutical and printing industries. Unfortunately, there is a lack of proper and environmentally sound management of solvent wastes which are considered as hazardous wastes. 

In 1974, F. Sherwood Rowland and Mario Molina, who shared the 1995 Nobel Prize in Chemistry with Crutzen, showed that chlorine from photolyzed chlorofluorocarbons (CFCs) such as CF2C12 and CFCI3, which were used as supposedly inert refrigerants, solvents for cleaning electronic components, plastic foam blowing agents, and aerosol spray propellants, can also catalyze ozone loss. Subsequently, the chlorine monoxide molecule CIO, which is involved in the chlorine-catalyzed ozone destruction cycle, has been shown to be present in the holes in the ozone layer and to correlate inversely with... 

K. R. Seddon, in Room-Temperature Ionic Liquids Neoteric Solvents for Clean Catalysis , www http //www.ch.qub.ac.uk/resources/ionic/review/review.html (22.05.1997). 

One approach that was considered is based upon the solubility parameter theory of Hildebrand and Scott (36, 37). This approach attempts to determine the best solvent for cleaning resins as a function of the known resin contaminants. Hildebrand and Scott (36, 37) developed the solubility parameter (6) to describe the property of solvents ... 

MC was a popular solvent for cleaning of semiconductor and degreasing of metal parts, but due to its ozone depletion potential, it has beer phased out and its use is strictly controlled. We have studied the photocatalytic decomposition of this as a typical chlorinated saturated hydrocarbon. 

Coating the inside of a capillary tube requires pretreatment of the silica so that the liquid will wet the surface and stick to it.1112 Stable stationary phases have been attained recently by bonding the liquid to the silica and/ or crosslinking it, using a variety of methods including gamma irradiation.13 The crosslinked bonded phase OT columns are very stable and can even be washed with (liquid) solvents for cleaning. 

The basic tenet of cleaning is like dissolves like. Polar solutions dissolve polar materials and vice versa for nonpolar solutions. Crystals cannot dissolve in oils, and grease cannot be cleaned by water. Lubricants based on chlorofluorocarbons require chlorofluorocarbon solvents for cleaning. Thus, for effective cleaning, you must know what you are cleaning to have an effective plan of (cleaning) attack. 

Methylene chloride (CH2C12) and chloroform (CHC13) are also good solvents for cleaning and degreasing work. Methylene chloride was once used to dissolve the caffeine from coffee beans to produce decaffeinated coffee. Concerns about the safety of coffee with residual traces of methylene chloride prompted coffee producers to use liquid carbon dioxide instead. Chloroform is more toxic and carcinogenic than methylene chloride it has been replaced by methylene chloride and other solvents in most industrial degreasers and paint removers. 

Dioxane is an excellent solvent for cleaning the flasks and crocks used in this first step. 

Substance A Regulatory action indicator Medium threshold carcinogen and irritant some evidence genotoxicity Medium commonly used as a solvent for cleaning industrial equipment in all manufacturing sectors not contained in consumer products or professional products Medium evidence that the chemical can be commonly detected in environmental media, organisms or humans not persistent or bioaccumuladve substance has low substitute availability... 

Application of coatings should also be made in ventilated areas. If the coating comes into contact with the skin, do not use a solvent for cleaning purposes. Remove the coating with a piece of clean cloth, followed by cleaning with soap and water. In case of eye contact flush continuously with clean water for 10-15 minutes. Emergency cases should be referred immediately to a physician. 

The hazards pertaining to compounding are related mainly to the storage and handling of promoters and accelerators and the use of flammable solvents for clean-up. 

Use Solvent for cleaning precision instruments, metal degreasing, pesticide, textile processing. 

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