摘要:
The present invention provides new energy solutions that are sustainable both environmentally and economically. The invention relates to photo-biocatalytic (PBC) methods and systems designed to produce and isolate carbonaceous chemicals using carbon dioxide, sunlight, and genetically engineered photosynthetic microorganisms. The PBC system comprises of procedural, mechanical and biological components designed for the production of carbonaceous chemicals. In an exemplary embodiment, the system includes a photo-biochemical reactor designed to maintain the genetically modified photosynthetic microorganisms in the optimal condition to capture carbon dioxide and convert it into metabolic intermediates using energy from sunlight, convert the metabolic intermediates into isoprene using recombinant enzymes, allow for the release of isoprene from cells, capture, separate and concentrate isoprene, and ultimately collect the isoprene at levels and in a form that would serve as a viable alternative to petroleum-dependent energy.
摘要:
A process for the continuous isomerization of an alkane to produce an isomerized product through contacting the alkane with a simulated moving bed acting as a catalyst for isomerization and an adsorbent for the alkanes has been developed. The alkane may be n-butane and the isomerized product 2-methylpropane, the alkane may be n-pentane and the isomerized product 2-methylbutane or 2,2-dimethylpropane, the alkane may have from 6 up to about 8 carbon atoms with no more than one methyl branch and the isomerized product having the same number of carbon atoms and at least two methyl branches, or the reactant may be a mixture of the foregoing alkanes with the corresponding isomerized products being formed. In a zone of the simulated moving bed, the alkanes are catalytically isomerized to form the isomerized products. The unreacted alkanes are adsorbed, and the isomerized products are collected. In a subsequent zone of the simulated moving bed, the unreacted alkanes are desorbed using a desorbent and may be catalytically isomerized to form additional isomerized products which are also separated and collected. The catalyst used in the simulated moving bed may be platinum on tungstated zirconia, and the adsorbent used in the simulated moving bed may be EU-1, ZSM-12, SAPO-5, Y-82, faujasite, erionite, zeolite beta exchanged with sodium, lithium, potassium, barium, calcium, strontium or combinations thereof, zeolite X exchanged with calcium and strontium, mordenite exchanged with sodium, lithium, potassium, barium, calcium, strontium, or combinations thereof.
摘要:
A PROCESS FOR CONVERTING BUTANE AND HEXANE INTO ISOPENTANE WHICH COMPRISES: (A) AVERAGING A C6 RICH HYDROCARBON STREAM CONTAINING LESS THAN 1 P.P.M. SULFUR WITH BUTANE IN AN AVERAGING ZONE BY CONTACTING THE C6 AND BUTANE HYDROCARBONS WITH AN AVERAGING CATALYST HAVING A COMPONENT WHICH HAS CATALYTIC ACTIVITY FOR ALKANE DEHYDROGENATION AND A COMPONENT WHICH HAS CATALYTIC ACTIVITY FOR OLEFIN AVERAGING TO OBTAIN AN NC5 RICH AVERAGING EFFLUENT STREAM, AND (B) ISOMERIZING AT LEAST A PORTION OF THE NC5 IN THE AVERAGING EFFLUENT STREAM IN AN ISOMERIZATION ZONE BY CONTACTING THE NC5 WITH AN ISOMERIZATION CATALYST AT A HYDROGEN PARTIAL PRESSURE BETWEEN 10 P.S.I.G. AND 3,000 P.S.I.G. AND A TEMPERATURE BETWEEN 100*F. AND 900*F. TO OBTAIN AN IC5 RICH STREAM.
摘要:
The present invention is directed to renewable compositions derived from fermentation of biomass, and integrated methods of preparing such compositions.
摘要:
At least one olefin and at least one isoparaffin are converted to a diesel fuel blending component by contacting the olefin and the isoparaffin with a catalyst selected from MCM-22, MCM-36, MCM-49, and MCM-56 to provide a product containing a diesel fuel.
摘要:
This invention relates to novel organophosphorothiolates and phosphorodithioates of the formula: ##STR1## wherein R is a (C.sub.1 -C.sub.4) alkyl group;R' is a (C.sub.3 -C.sub.6) alkyl group;Y is an oxygen atom or a sulfur atom;X is a halogen atom, a (C.sub.1 -C.sub.5) alkyl group, a (C.sub.1 -C.sub.5) alkoxy group, a trifluoromethyl group, a cyano group, or a group of the formula: ##STR2## wherein R" is a hydrogen atom or a (C.sub.1 -C.sub.3) alkyl group; X' is a halogen atom, a nitro group, a (C.sub.1 -C.sub.5) alkyl group, a (C.sub.1 -C.sub.5) alkoxy group, a trifluoromethyl group, a cyano group, or a group of the formula: ##STR3## wherein R" is a hydrogen atom or a (C.sub.1 -C.sub.3) alkyl group; and M AND M' ARE THE SAME OR DIFFERENT AND ARE INTEGERS FROM 0 TO 3;To compositions containing them and to methods of using them to control pests.
摘要:
A process for disproportionating paraffinic hydrocarbons containing three to seven, four to five, carbon atoms in a hydrogen atmosphere to yield products containing iso-paraffinic hydrocarbons containing one more and hydrocarbons containing one less carbon fragment per molecule is disclosed. In the process, the paraffinic hydrocarbon is contacted in a hydrogen atmosphere at about 700* to 900* F. with a solid, acidic catalyst comprising a minor, catalytically effective amount of a platinum-group metal and containing a hydrogen or metal exchanged crystalline aluminosilicate having pores in the 8 to 15 A range and a mole ratio of silica-to-alumina of greater than about 2 to 1 and a solid oxide support. The catalyst can contain from about 1 up to about 85 weight percent of the crystalline aluminosilicate. A preferred oxide support is silica-alumina which can further contain a minor amount of alumina such as an activated alumina of the gamma family.
摘要:
The present disclosure relates generally to processes and systems for producing liquid transportation fuels by converting a feed stream that comprises both isopentane and n-pentane, and optionally, some C6+ hydrocarbons. Isopentane and smaller hydrocarbons are separated to form a first fraction while n-pentane and larger components of the feed stock form a second fraction. Each fraction is then catalytically-activated in a separate reaction zone with a separate catalyst, where the conditions maintained in each zone maximize the conversion of each fraction to olefins and aromatics, while minimizing the production of C1-C4 light paraffins. In certain embodiments, the first fraction is activated at a lower temperature than the second fraction. Certain embodiments additionally comprise mixing at least a portion of the two effluents and contacting with an alkylation catalyst to provide enhanced yields of mono-alkylated aromatics that are suitable for use as a blend component of liquid transportation fuels or other value-added chemical products.