Battelle-institut E.v.

Battelle Institute E.v.

Battelle Ingenieurtechnik Gmbh

Peter Schwerdt

Rolf Eggersdorfer

Jurgen Wittekind

Karl-Heinz Scherer

Rolf-Erhard Schmitt

Juergen Wittekind

A neutralizing agent for effective but mild mass de-acidification of books and other paper products, consisting of a solution of one or more kinds of double alkoxides, each with one alkoxide of a metal promoting solubility, such as group IV metals, aluminum or tin, and one alkoxide of a metal binding the acids in the paper, such as alkali or alkaline earth metals, wherein a non-polar solvent can be used, which exhibits good compatibility with the archive materials.

Neutralizing agent for paper products

Solvents for agents or neutralizing media known in and of themselves for efficient, environmentally safe mass deacidification of books and other paper products, in the form of methylsiloxanes having at least two and maximally four silicon atoms, are a replacement for the previously used, environmentally unfavorable solvents such as chlorofluorohydrocarbons, whereby these special organosiloxanes are suitable to the same degree for use as solvents as well as for application in the recommended, efficient process and cause as little damage as possible to the books.

Solvents for agents to mass deacidify books and other paper products in

Process and device for the nonpolluting mass deacidification of books and other printing and paper products with the predrying of these products by high-frequency radiation in a vacuum, then the application of a neutralization treatment with solutions for deacidification and the subsequent drying of solvents used also by high-frequency radiation in a vacuum. Preferably a single treatment chamber (1) for predrying, neutralizing and drying is used. The interior space of the treatment chamber can be exposed to high-frequency/microwave radiation of a generator (2), to which devices (4, 8, 9; 10 to 19 and 5) combined into a closed movable unit with chamber (1) are connected for the supply and removal of the solutions, for the evacuating of air and for the environmentally favorable separation of vapors when drying the accumulated exhaust air. The process and the device make possible a quick and efficient, as well as nonpolluting, mass deacidification with nearly complete recovery of the solvents.

Process and device for nonpolluting mass deacidification of books and

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Frankfurt am Main, Germany

Peter Schwerdt