Cellulose ester compositions derived from recycled Cellulose ester content syngas
AssigneeEastman Chemical Company
InventorsFrederick Leslie Colhoun, Ronald Buford Sheppard, William Lewis Trapp
Life of this patent
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Abstract
A process for preparing a recycle cellulose ester and a recycle cellulose ester composition and articles made with such recycle cellulose esters comprising at least one cellulose ester having at least one substituent on an anhydroglucose unit (AU) derived from recycled cellulose ester content syngas are provided. The recycled cellulose ester content syngas can be obtained by gasifying feedstocks containing a solid fossil fuel such as coal, a cellulose ester, and water. The cellulose ester can be post-consumer or post-industrial cellulose ester.
Claims17
A process for preparing a recycle cellulose ester (Recycle CE) comprising:
- (1) preparing a recycled CE content syngas in a synthesis gas operation by gasifying a feedstock containing a solid fossil fuel source, at least some content of recycled CE, and optional recycled plastics, wherein the feedstock comprises the solid fossil fuel source in an amount of at least 80 wt %, based on the weight of solids in the feedstock, and comprises not more than 0.5 wt. % of any one of sewage sludge, waste paper, biomass, or a combination of two or more, each based on the weight of solids in the feedstock;
- (2) using the recycled CE content syngas as a feedstock in a reaction scheme to produce at least one cellulose reactant for preparing a Recycle CE;
- and (3) reacting said at least one cellulose reactant to prepare at least one Recycle CE, wherein the process comprises a closed loop process.
An integrated process for preparing a Recycle CE which comprises the processing steps of:
- (1) preparing a recycled CE content syngas in a synthesis gas operation utilizing a feedstock that contains a solid fossil fuel source and at least some content of recycled CE, wherein the feedstock comprises the solid fossil fuel source in an amount of at least 80 wt %, based on the weight of solids in the feedstock, and comprises not more than 0.5 wt. % of any one of sewage sludge, waste paper, biomass, or a combination of two or more, each based on the weight of solids in the feedstock;
- (2) preparing at least one chemical intermediate from said syngas;
- (3) reacting said chemical intermediate in a reaction scheme to prepare at least one cellulose reactant for preparing a Recycle CE, and/or selecting said chemical intermediate to be at least one cellulose reactant for preparing a Recycle CE;
- and (4) reacting said at least one cellulose reactant to prepare said Recycle CE;
- wherein said Recycle CE comprises at least one substituent on an anhydroglucose unit (AGU) derived from recycled CE content syngas, wherein the process comprises a closed loop process.
A process for preparing a recycle cellulose acetate composition (Recycle CA) comprising:
- (1) preparing a recycled CE content syngas in a synthesis gas operation by gasifying a feedstock containing a solid fossil fuel source and at least some content of cellulose acetate scrap, wherein the feedstock comprises the solid fossil fuel source in an amount of at least 80 wt %, based on the weight of solids in the feedstock, and comprises not more than 0.5 wt. % of any one of sewage sludge, waste paper, biomass, or a combination of two or more, each based on the weight of solids in the feedstock;
- (2) determining a recycled content value of the feedstock;
- (3) providing a cellulose acetate composition and determining a recycled content value for the composition to provide a recycle cellulose acetate composition (Recycle CA), wherein at least a portion of the composition recycled content value is associated with the feedstock recycled content value, and wherein the cellulose acetate scrap comprises cellulose acetate and/or cellulose diacetate.
Dependencies are inferred from the claim text.