A refrigerator oil for use with an HFC refrigerant containing HFC-134a and/or HFC-125, comprises an alkylbenzene oil containing at least 60% by weight of alkylbenzenes having a molecular weight of 200 to 350. The use of such an oil prevents a refrigerating compressor from undergoing seizure.

The learning game is of the domino type and has a number of bricks, which are made of different wood types. The brick (1) front sides show two symbols (2a, 2b) which have a connection with the wood type of which the actual brick is made. The symbols can e.g. by a picture of a leaf from the wood type or a picture of a typical usage of the wood type, e.g. a house or a boat. The brick front side even...

L'invention concerne des mélanges non azéotropiques contenant en masse environ 10 à 22% de difluorométhane, 4 à 8% de trifluorométhane et 72 à 82% de 1,1,1,2-tétrafluoroéthane. Ces mélanges ont pour objet de remplacer le chlorodifluorométhane dans les systèmes de réfrigération ou de conditionnement d'air. L'invention vise également l'utilisation desdits mélanges comme fluide frigorigène.; A non-az...

A method for purifying flue-gases and other hot, oxidative waste gases originating from industrial installations, combustion furnaces, engines and the like, whereby the hot gas to be purified is passed through at least one spraying chamber or -area and is contacted therein with a gas washing liquid, which is sprayed into the hot gas flow and cools the gas to below 100 DEG C, whereby residual liqui...