Snow removal agent and preparation method thereof

Compositions – Frost-preventing – ice-thawing – thermostatic – thermophoric,...

Reexamination Certificate

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Details

C106S013000, C241S022000, C241S025000

Reexamination Certificate

active

07666324

ABSTRACT:
Disclosed is a preparation method of a snow removal agent comprising: a crushing step of crushing halite using a crusher; an aging step of aging the crushed halite; a first mixing step of mixing the aged halite with magnesium chloride in a stirring machine and stirring the mixture; and a second mixing step of adding sodium tripolyphosphate, sodium metasilicate and urea and stirring the resultant mixture. The snow removal agent prepared by the present invention is not hardened even when stored for a long period of time and is environment-friendly with no negative effects to plants, fish and shellfish.

REFERENCES:
patent: 2947603 (1960-08-01), Miller
patent: 4676918 (1987-06-01), Toth et al.
patent: WO 98/47978 (1998-10-01), None
patent: WO 2004/013250 (2004-02-01), None
Derwent-Acc-No. 2005-665572, abstract of Chinese Patent Specification No. CN 1618916A, (May 2005).
Derwent-Acc-No. 2006-232667, abstract of Chinese Patent Specification No. CN 1693407A, (Nov. 2005).
Translation of Chinese Patent Specification No. CN 1618916A (May 2005).
Translation of Chinese Patent Specification No. CN 1693407A (Nov. 2005).

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