Abstract: The present invention relates to a process for the preparation of solutions of aluminum salts, characterized in that an aluminate of an alkali metal and/or alkaline earth metal is dissolved in an acid solution to the formation of a solution which is used as such or is diluted to a suitable concentration.

Abstract: A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers and cationic starch on a wire or fabric, characterized in that the forming and dewatering takes place in the presence of an alkali metal silicate and a phenolic resin added at the same point into the suspension, and polyethylene oxide added at a subsequent point into the suspension. The amount of alkali metal silicate is 0.1 kg per ton to 50 kg/ton based on silica content per ton of dry fibers. The amount of phenolic resin is 0.01 kg/ton to 5 kg/ton based on weight of resin in the as-supplied material per ton of dry fibers. The amount of polyethylene oxide is 0.01 to 2.0 kg/ton based on weight of polyethylene oxide per ton of dry fibers.

Abstract: The present invention relates to a process for the preparation of a coagulant for water purification, in particular purification of sewage water, for pulp and paper manufacture, for dewatering organic matter, for concentrating minerals, and containing a metal salt and silicate, whereby a solid zeolite is dissolved in a solution of trivalent metal salt in a molar ratio Me.sup.3+ :Si of >2:1, preferably 2-500:1, as well as a coagulant.

Abstract: The present invention relates to a process for the elimination of heavy metals from a closed white water system within the pulp and paper industry, wherein one adjusts the pH of the white water to between 5 and 11, and that one subsequently precipitates the resins present using a flocculation agent, whereby by a simultaneous elimination of the heavy metals is obtained.

Abstract: The present invention relates to a process for the preparation of polyaluminum hydroxychloride complexes having the general formula Al(OH).sub.x Cl.sub.y in solution or in solid form and intended to be used as flocculants and coagulants for water purification, sludge dewatering, plant dewatering and paper production, whereby one reacts aluminum chloride in solution with aluminum hydroxide, or aluminumoxide hydrates at a temperature of 120.degree.-170.degree. C. at an elevated pressure for 1.5-5 hrs, whereby the relationship AlCl.sub.3 :Al(OH).sub.3 is thus adjusted that the relationship OH:Al in the renewing compound Al(OH).sub.x Cl.sub.y becomes 0.5 to 1.5, preferably 0.8 to 1.2.