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| Number | Title | Issue Date |
| 5928613 | Apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 07/27/1999 |
| 5869646 | Method and apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 02/09/1999 |
| 5770726 | Process for preparing a cellllose acetoacetate alkanoates The present invention relates to a process for preparing a substituted cellulose acetoacetate alkanoate without using a carboxamide/lithium chloride solvent system. The process involves contacting cellulose in a carboxylic acid diluent with an acetylating... | 06/23/1998 |
| 5608050 | Process for the manufacture of cellulose acetate The specification discloses a process for the manufacture of cellulose acetate. The process reacts, at a temperature suitable for acetylation, an acetic acid activated pretreated cellulose raw material containing 100 parts cellulose by dry weight, and 0.5... | 03/04/1997 |
| 5294703 | Process for preparing -D-cellobiose octaacetate Provided is a novel improved process for the preparation of -D-cellobiose octaacetate via the acetylative degradation of cellulose or cellulose acetate. The title compound is provided in high yield and quality in a facile one-pot process, amenable ... | 03/15/1994 |
| 4906579 | New catalytically oxidized polyglucosic units and methods of making same leading to aldehyde groups on the C-6 position of polyglucosic product and new products therefrom A method to selectively oxidize a polyglucose, on the oxygen of the hydroxy groups of the C-6 position of the glucose rings, while substantially maintaining the degree of polymerization of the polyglycosidic units, comprising heating a 6-sulfonyl polygluc... | 03/06/1990 |
| 4697007 | Preparation of microcrystalline triacetylcellulose The preparation of microcrystalline triacetylcellulose by acid-catalyzed acetylation of microcrystalline cellulose, perfluoroalkanesulfonic acids with 1 to 8 carbon atoms are used as the catalyst, resulting in a non-hazardous process and high yields of ex... | 09/29/1987 |
| 4480090 | Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75° C. and about 110° C. a cellulose compound having esterifiable hydroxyl groups with an esterifyi... | 10/30/1984 |
