Abstract: Process for the separation of a mixture of chloroacetyl chloride and dichloroacetyl chloride by extractive distillation. The mixture of chloroacetyl chloride and dichloroacetyl chloride is treated with n-dodecane, which is a saturated aliphatic hydrocarbon extraction agent. Lower levels of dichloroacetyl chloride contaminant are achieved than by prior art processes.

Abstract: A process for the production of a monohaloacetylhalide characterized in that a ketene is reacted with a halogen in the presence of a diester of phosphonic acid of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different alkyl or aryl, or R.sub.1 and R.sub.2 are the same or different alkyl or aryl and R.sub.3 is --COOR or --CH.sub.2 COOR, wherein R is alkyl or aryl. The diester is a solvent which impedes or prevents the formation of polyhaloacylhalides and which keeps the formation of acylhalides to a minimum.

Abstract: A tablet-form preparation for the prevention of lime deposits in water systems. The table-form preparation contains (a) citric acid and at least one member selected from the group consisting of acetylsalicylic acid, boric acid and nicotinic acid, or (b) nicotinic acid. The tablet-form preparation contains 0.05 to 1 percent by weight of a formaldehyde resin condensation product when the preparation is citric acid and at least one member selected from the group consisting of acetylsalicylic acid and boric acid. A process of using the tablet-form preparation in a water system to prevent the formation of lime deposits in such water system, e.g., a humidifier. A process of tableting a preparation which comprises (a) citric acid and at least one member selected from the group consisting of acetylsalicylic acid, boric acid and nicotinic acid, or (b) nicotinic acid.

Abstract: A process for recovering copper and noble metals from organic precipitates, residues and polymerizates which involves subjecting the organic components to a slow, low-temperature carbonization process without the use of any additional heat supplying elements. The metals remain in the ash in the form of salts. Normally the metals in the resulting solution are not separated out but can be recycled directly to the process as active components. No additional components need be added. Typically, the burning process takes place with a conversion rate of approximately one percent per hour. Preferably the burning process takes place at a temperature between 300.degree. and 500.degree.C. The ash is obtained in a form in which it almost completely dissolves in suitable acids, preferably hydrochloric acid. Preferably the process is used to burn the copper and palladium chloride containing residues obtained from the process of the oxidation of ethylene to form acetaldehyde.