An aerosol propellant comprises a methylene-chloride-in-water water/out emulsion comprising water, methylene chloride and a surfactant and a propellant gas soluble in methylene chloride.
The crystalline biphenyl acrylic acid is separated from methylene chloride by filtration, the filter cake is washed with methylene chloride and is dried.
Very soluble in water and in methylene chloride.
In its turn, it becomes unnecessary too to use methylene chloride.
The organic solvent is preferably methylene chloride.
The methylene chloride recuperation is carried out in two steps according to the thermal method, during the heating of the absorbent used.
Copolymers of lactide and glycolide with high glycolide content. the average glycolate block length is less then about 3, allows the copolymer to be soluble in slightly polar solvents such as methylene chloride.
A mixture of pentafluoropropionic acid and methylene chloride and a mixture of p-toluene sulphonic acid and methane sulphonic acid are particularly suitable as solvents.
The process uses heated recirculated ultra-pure water for wax liquefaction, and therefore eliminates methylene chloride from the process.
The residue is then dissolved in a third solvent comprising tertiary butanol and methylene chloride to form a third solution.
Processes, apparatus, and materials for the microbiological degradation of methylene chloride to carbon dioxide and hydrogen chloride are described.
The compositions avoid the use of methylene chloride, phenol, corrosives and caustics, methanol, toluol or acetone.
Said solvent is preferably selected from the group consisting of acetone, methylene chloride, toluene and carbon disulfide.
The paint stripper composition of the present invention is free from methylene chloride and does not contain monoethanol amine.
The generated methylene chloride vapor, water vapor, and occasionally surfactant vapor penetrate into a waste synthetic resin film (W).
The present invention relates to a method for oxidation of sulfide analog with sodium hypochlorite in methylene chloride, and also an improved process for the purification of pantoprazole sodium sesquihydrate.