Deicing chemicals and their preparation from polysaccharide sour

Details Deicing chemicals and their preparation from polysaccharide sour Deicing chemicals and their preparation from polysaccharide sour

1984-09-28

1987-05-12

Bashore, S. Leon

Compositions

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

162 16, C09K 318

Patent

active

046648321

ABSTRACT:
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.

REFERENCES:
patent: 2233185 (1941-02-01), Smith
patent: 2673148 (1954-03-01), Harris
patent: 2686120 (1954-08-01), Marshall et al.
patent: 2750414 (1955-06-01), Chesley et al.
patent: 3640768 (1972-02-01), Eickemeyer
patent: 3756956 (1973-09-01), Panusch
patent: 3764464 (1973-10-01), Samuelson
patent: 3769152 (1973-10-01), Samuelson et al.
patent: 4108669 (1978-08-01), Otrhalek et al.
patent: 4351669 (1982-09-01), Nielsen
patent: 4374743 (1983-02-01), Stockel
patent: 4377488 (1983-03-01), Gancy
patent: 4400285 (1983-08-01), Gancy
patent: 4430240 (1984-02-01), Sandvig et al.
patent: 4448702 (1984-05-01), Kaes
Abstract 132336e (Czech. Pat. No. 148,730), 1973.
Abstract 132337f (Czech. Pat. No. 148,729), 1973.
Abstract 147836s (Jap. Pat. No. 73 05,673), 1973.
Abstract 68269f (Jap. Pat. No. 73 17,482), 1973.
Abstract 168222n (Ger. Pat. No. 2,107,558), 1972.
Abstract 55786u (Czech. Pat. No. 134,189), 1969.
Abstract 132602q (U.S.S.R. Pat. No. 272,462), 1970.
Abstract 59388f (French Pat. No. 1,509,475), 1968.
Abstract 19019a (French Pat. No. 1,401,440), 1965.
Gilbert et al., "Hydrolysis of Wood", Jul. 1952, Industrial and Engineering hemistry.
Mahood et al., "Reaction Products of Alkali-Sawdust Fusion Acetic, Formic, and Oxalic Acids and Methyl Alcohol" Journal of Ind. Eng. Chem., vol. 11, No. 7, 7/1979.
Melander, "Ligninundersokningar" 1921.
Othmer et al., "Oxalic Acid from Sawdust" Ind Eng Chem, Mar. 1942.
Minor et al., "Oxygen Pulping of Shortleaf Pine with Sodium Carbonate" Tappi vol. 58, No. 3, Mar. 1975.
Jamieson et al., "Oxygen-sodium Bicarbonate Pulping of White Birch" Tappi vol. 58, No. 2, Feb. 1975.
Marton et al., "Oxygen Pulping of Thermomechanical Fiber" Tappi vol. 58, No. 2, Feb. 1975.
Hata et al., "Oxygen-alkali Semichemical, Pulping of Wood Chips" Tappi vol. 58, No. 2, Feb. 1975.
Sarkanen et al., "Use of Oxygen in Pulping" AICHE Symposium Series, vol. 72, No. 157 (1976).
Bjorksten Research Laboratories, Inc., "Unsolicited Proposal Deicing Chemicals from Cellulosic Waste" P-3050-1.
National Cooperative Highway Research Program Report No. 19, 1965.
Federally Coordinated Program of Highway Research and Development Report.
Othmer et al., "Continuous Fusion Process" Ind Eng Chem, Mar. 1942.

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