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公开(公告)号：US4430240A
公开(公告)日：1984-02-07
申请号：US338848
申请日：1982-01-12
IPC分类号： C09K3/18
CPC分类号： C09K3/185
摘要： De-icing chemicals intended primarily for de-icing pavement such as roads,ridges, and runways are prepared from polysaccharide sources (e.g. waste products such as sawdust) by reaction at elevated pressure and temperature with alkaline earth metal oxides or hydroxides in the presence of water. The de-icing chemicals are impure mixtures of alkaline earth metal salts of acetic acid, lactic acid and glycolic acid with the mixture being substantially free of alkaline earth metal salts of oxalic acid and formic acid. The de-icing chemicals are intended to be a substitute for the inorganic chloride salts (e.g. sodium chloride) commonly used for de-icing highways.
摘要翻译： 主要用于除冰路面，如道路，桥梁和跑道的除冰化学物质是通过在高压和高温下与碱土金属氧化物或氢氧化物反应而在多糖来源（例如废弃物如锯屑）中制备的 水。 除冰化学品是乙酸，乳酸和乙醇酸的碱土金属盐的不纯混合物，其混合物基本上不含草酸和甲酸的碱土金属盐。 除冰化学品旨在替代通常用于除冰公路的无机氯化物盐（如氯化钠）。
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公开(公告)号：US4664832A
公开(公告)日：1987-05-12
申请号：US655876
申请日：1984-09-28
IPC分类号： C09K3/18
CPC分类号： C09K3/185
摘要： Deicing chemicals intended primarily for decing pavement such as roads, bridges, and runways are prepared from polysaccharide sources (e.g., waste products such as sawdust) by reaction at a pressure of less than 600 psi and a temperature less than 200.degree. C. with a treating agent comprising alkali metal carbonates or bicarbonates or a mixture thereof and excess oxygen in the presence of water followed by the removal of oxalate and the treating agent. The reaction produces a liquid or a liquid/solid reaction product wherein the liquid contains the deicing chemical and the solid comprises a valuable pulp by-product. Calcium oxide or calcium hydroxide may be added to reduce the pressure resulting from the formation of large amounts of carbon dioxide during the reaction process and to aid in the removal of any oxalic acid formed during the reaction process. The deicing chemicals are impure mixtures of alkali metal salts of lower carboxylic acids substantially free of the alkali metal salt of oxalic acid, carbonic acid and of other organic compounds. The deicing chemicals are intended to be a substitute for the inorganic chloride salts (e.g, sodium chloride) commonly used for deicing highways.
摘要翻译： 主要用于道路，桥梁和跑道路面铺路的除冰化学品是通过在低于600psi的压力和低于200℃的温度下反应从多糖来源（例如，废木制品等）制备的，具有 处理剂包括碱金属碳酸盐或碳酸氢盐或其混合物和过量的氧，然后在水的存在下除去草酸盐和处理剂。 反应产生液体或液体/固体反应产物，其中液体含有除冰化学品，固体包含有价值的纸浆副产物。 可以加入氧化钙或氢氧化钙以减少在反应过程中由大量二氧化碳形成的压力，并有助于除去在反应过程中形成的任何草酸。 除冰化学品是基本上不含草酸，碳酸和其它有机化合物的碱金属盐的低级羧酸的碱金属盐的不纯混合物。 除冰化学品旨在替代通常用于除冰公路的无机氯化物盐（例如氯化钠）。
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