摘要:
The present invention relates to a process for the preparation of an organic composition which contains a functional component chosen from the group consisting of a thermoplastic polymer, an enzyme, a setting agent, a paraffin, an oil, a colouring agent and a hair or skin care substance, comprising as process steps of providing an n-nonyl ester as an additive, which is obtainable by reaction of an n-nonyl alcohol component with a further component which is capable of reacting with the n-nonyl alcohol component to form an n-nonyl ester, and the functional component, and optionally at least one further additive; and mixing of the n-nonyl ester, the functional component. and optionally the at least one further additive.
摘要:
The present invention concerns a method for the production of carboxylic acid esters containing the steps: a. Supplying of a component containing carboxylic acid and an alcohol; b. Bringing the component containing carboxylic acid in contact with the alcohol in a container for a conversion to carboxylic acid esters by means of esterification or transesterification, characterized in that the container is moved over a distance of at least 1 kilometer during the esterification or the transesterification. The present invention also concerns the use of a ship.
摘要:
Oligoglycerol esters of fatty acids, preferably of unsaturated fatty acids, can be used as thickeners in oil-based drilling mud compositions. The oligoglycerides are preferably employed in invert drilling muds, the oily phase of which contains paraffins.
摘要:
A spinning rotor for an open-end spinning device is proposed which is provided with a smooth surface at the critical locations in order to avoid deposits within the spinning rotor at its inner surface. The ring-shaped zone of the inner surface of the spinning rotor near its edge as well as the area of its bottom may for instance be made especially smooth by polishing.
摘要:
A method of recovering copper from oxidic and/or silicate copper ores by way of pyrometallurgy. With this method, the copper ores are melted in a reaction zone heated by plasma jets and maintained at a temperature of at least 1,500.degree. C. At this high temperature, the thermal decomposition of the oxidic or silicate copper compounds occurs, whereas no such decomposition of accompanying metal oxides takes place. The furnace used to perform this method includes a refractory lining of carbonless material. The reaction furnace and, thus, the reaction zone are sealed relative to the atmosphere to prevent oxygen from entering thereinto. An inert gas is used as plasma gas.
摘要:
In order to melt particulate material in an electric furnace with the help of at least one electric arc burning between a burner electrode arranged in the lid of the furnace and a bottom electrode arranged in the bottom of the furnace, the material is introduced into a space surrounding the electric arc. It is melted by the radiation heat of the electric arc and is collected in a melt bath covering the bottom part of the furnace. In order to attain a high energy exploitation and to prevent the material to be melted from being extracted, a fixed bed of the material to be melted is formed in the space surrounding the electric arc, which takes its root on the bottom part of the furnace and peripherally surrounds the electric arc. The material is melted on the side of the fixed bed facing the electric arc. The fixed bed is moved approximately radially towards the center of the furnace to an extent corresponding to the melted material volume. The material to be melted is charged between the fixed bed and a shell externally surrounding the fixed bed.
摘要:
A method of manufacturing a combined yarn which includes feeding staple fibers to the collection groove of an open-end spinning rotor, twisting the staple fibers into a staple fiber yarn, combining the staple fiber yarn with a continuous filament yarn which is also fed into the spinning rotor and then twisting the continuous filament yarn and the staple fiber yarn together to form a balanced ply yarn.
摘要:
Hydrogen chloride gas obtained as a by-product in the production of chloroacetic acid by subjecting acetic acid to a catalytic chlorination reaction with chlorine gas in the presence of acetic anhydride and/or acetyl chloride is purified. The prepurified by-product still contains 0.1-3 vol % acetyl chloride and up to 0.1 vol % chloroacetyl chloride. For purification, the hydrogen chloride gas is passed through two zones series-connected together and scrubbed in countercurrent fashion. More particularly, it is scrubbed in the first zone with concentrated hydrochloric acid and in the second zone with concentrated sulfuric acid.
摘要:
A ski has an elongated body part, a polyethylene bottom layer arranged on the body part, and a roughening provided on a sliding surface of the bottom layer over a supporting length of the ski and including a plurality of projections each formed as an elongated tooth from polyethylene of the bottom layer and inclined in its entirety toward the rear end of the body part, wherein the teeth are arranged with a density of between 1000 and 4000 teeth per cm.sup.2. The inventive ski is manufactured by dry grinding of the sliding surface of the polyethylene bottom layer with a relatively high efficiency.
摘要:
An air intake filter for internal combustion engines designed to prevent the escape of fuel fumes to the atmosphere, the filter cartridge including a rectangular block-shaped filter body folded of filter paper with horizontal top and bottom fold edges, the fold cavities on the downstream side of the cartridge being filled with activated carbon which is retained by a cover layer of fiber fleece. The outer edges of the filter body and of the cover layer are embedded in a resilient sealing collar. The longitudinal extremities of the fold cavities are closed by fold pockets.