摘要:
Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise hydrogenating the olefins under conditions sufficient to form a fuel composition. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.
摘要:
Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock with a low-molecular-weight olefin or mid-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.
摘要:
Methods are provided for refining natural oil feedstocks. The methods comprise reacting the feedstock with a low-molecular-weight olefin or mid-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product comprising olefins and esters. In certain embodiments, the methods further comprise separating the olefins from the esters in the metathesized product. In certain embodiments, the methods further comprise transesterifying the esters in the presence of an alcohol to form a transesterified product.
摘要:
Methods are provided for producing a jet fuel composition from a feedstock comprising a natural oil. The methods comprise reacting the feedstock with a low-weight olefin in the presence of a metathesis catalyst under conditions sufficient to form a metathesized product. The methods further comprise hydrogenating the metathesized product under conditions sufficient to form a jet fuel composition.
摘要:
Methods are provided for producing a jet fuel composition from a feedstock comprising a natural oil. The methods comprise reacting the feedstock with oxygen under conditions sufficient to form an oxygen-cleaved product. The methods further comprise hydrogenating the oxygen-cleaved product under conditions sufficient to form a jet fuel composition.
摘要:
A method for preparing a ruthenium carbene complex precursor includes reacting a ruthenium refinery salt with a hydrogen halide to form a ruthenium intermediate, and reacting the ruthenium intermediate with an L-type ligand to form the ruthenium carbene complex precursor. A method for preparing a ruthenium vinylcarbene complex includes converting a ruthenium carbene complex precursor into a ruthenium hydrido halide complex, and reacting the ruthenium hydrido halide complex with a propargyl halide to form the ruthenium vinylcarbene complex. A method for preparing a ruthenium carbene complex includes converting a ruthenium carbene complex precursor into a ruthenium carbene complex having a structure (PR1R2R3)2Cl2Ru═CH—R4, wherein R1, R2, R3, and R4 are alike or different, and wherein covalent bonds may optionally exist between two or more of R1, R2, and R3.
摘要:
Processes for producing aromatic monomers useful for forming polyesters are disclosed. Cost effective steps employed in the processes permit small amounts of process-related materials typically removed from monomer to remain in an aromatic monomer product. In many cases, the presence of the process-related materials left in the monomer product by the cost effective process steps can enhance the performance of the monomer in certain applications. Aromatic monomer products and polymers produced therefrom having these advantages also are disclosed, as well as products such as pasteurizable bottles made from these polymers.
摘要:
Processes for producing aromatic monomers useful for forming polyesters are disclosed. Cost effective steps employed in the processes permit small amounts of process-related materials typically removed from monomer to remain in an aromatic monomer product. In many cases, the presence of the process-related materials left in the monomer product by the cost effective process steps can enhance the performance of the monomer in certain applications. Aromatic monomer products and polymers produced therefrom having these advantages also are disclosed, as well as products such as pasteurizable bottles made from these polymers
摘要:
Disclosed is a multi-layer sheet in a which a foamed thermpolastic core layer is extrusion coated with a multi-resin reclaim-containing layer, and an EVOH or acrylonitrile barrier layer is laminated to the multi-resin layer. The multi-resin layer is formulated to contain at least about 5 weight percent, and preferably about 8 to about 16 weight percent, based on the weight of the layer, of an adhesive resin to reduce the tendency of the barrier layer to delaminate from the multi-resin layer over time. The preferred adhesive is EMA.
摘要:
A polyamide composition comprising the following recurring units: ##STR1## in proportions such that the mole ratio of the dicarboxylic acid moieties in the A, B and C units is about 49.5-0.5/0-20/0.5-49.5 and wherein R is a divalent radical comprising ##STR2## in a mole ratio of about 0.5-50/49.5-0 and preferably having a glass transition temperature of 90.degree. C. or greater and an oxygen transmission rate of about 2.0 cc-mil/100 in.sup.2 -day-atm or less.