904results about "Ether preparation" patented technology

Improved processing for the production of light olefins via oxygenate conversion processing is provided. Synthesis gas conversion such as to produce an effluent including at least methanol can be integrated with oxygenate conversion processing such as to produce an oxygenate conversion reactor effluent including at least light olefins and dimethyl ether. At least a portion of the oxygenate conversion reactor effluent can be contacted with such produced methanol to effect recovery of dimethyl ether from the oxygenate conversion reactor effluent.

The invention relates to a method for preparing an aromatic compound by direct catalytic cracking of lignin. Under the combined action of a catalyst and a solvent, industrial lignins such as natural lignin, sodium lignin sulfonate, alkali lignin and dealkalized lignin are used as raw materials and are selectively cracked into the aromatic compound derived from C6-C9 phenolic group, guaiacol group or syringyl through the catalytic process. The conversion rate of the raw materials reaches over 50%, and the guaiacol group and the syringyl aromatic compound account for over 90% in a cracking product. The method has the characteristics of cheap raw materials, high conversion rate, high yield of the aromatic compound and mild reaction condition.

The present invention is directed generally to a method of production of biobased chemicals, biofuels, and lignin residues from lignin sources, including waste lignin. This method may allow for selectively producing biobased chemicals, biofuels, and lignin residues from lignin sources using certain processing methods. The methods for production of these biobased chemicals, biofuels, and lignin residues may be provided by chemical-induced processing, catalytic oxidative lignin depolymerisation processing, and catalytic hydroprocessing. Further, the catalytic hydroprocessing from processes including catalytic reduction processing, catalytic hydrodeoxygenation processing, and/or catalytic/dehydrogenation processing may also be used. The method described herein also provides a means in which waste from the process(es) may be reduced and/or recycled.

The present invention relates to a method for synthesizing dimethyl ether by high-effectively cleanly utilizing biomass. It utilizes the gasified gas produced by catalytic gasification of biomass air-water vapor, and makes the gasified gas undergo the process of methane reformation to prepare synthetic gas, and utilizes the synthetic gas to directly synthesize clean fuel dimethyl ether.

The invention relates to hydrocracking of lignin, and specifically relates to a method for applying a tungsten-based catalyst to catalyze lignin hydrocracking for producing an aromatic compound. The catalyst comprises a main active component of non-zero-valent tungsten, and a second metal component of a small amount of one or more transition metals selected from zero-valent nickel, cobalt, ruthenium, iridium, palladium, platinum, iron, and copper. According to the method, raw materials such as lignin, biomass hydrolysis residue, lignosulfonate, and alkaline lignin are subject to catalytic hydrogenation under a hydrothermal condition with a temperature of 120 to 450 DEG C and a hydrogen pressure of 1 to 20MPa; the raw materials are cracked into C6-C9 phenolic compounds with high selectivity. A maximal phenol yield reaches 55.6%. Compared to existing technologies, according to the invention, renewable natural biomasses are adopted as raw materials, such that the raw materials are cheap, and have wide sources; inorganic acid and alkali are not required, such the production of a large amount of alkaline solution in traditional lignin catalysis is avoided; the tungsten-based catalyst is cheap; the reaction process is green, and has atom economical characteristics.

Alcohols, ethers, aldehydes, and olefins are manufactured from alkanes by mixing an alkane and a halogen selected from the group including chlorine, bromine, and iodine in a reactor to form alkyl halide and hydrogen halide. The alkyl halide only or the alkyl halide and the hydrogen halide are directed into contact with metal oxide to form an alcohol and/or an ether, or an olefin and metal halide. The metal halide is oxidized to form original metal oxide and halogen, both of which are recycled.

New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.

A method for preparing single benzene ring phenolic compounds by catalytic conversion of alkali lignin. Hydrogen is added into water phase to degrade alkali lignin into single benzene ring phenolic compound, under a reaction temperature of 90-180 DEG C, a hydrogen pressure of 1.0-10.0MPa and under effect of a metal nanoparticle catalyst; and alkali compound is added into the reaction. The metal nanoparticle catalyst is one or more selected from Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au in any ratio. The method has mild reaction conditions, low energy consumption, low costs, high operating safety and easily separated products.

The invention discloses a catalyst with active component nano particles embedded in a molecular sieve to crystallize. The catalyst comprises metal active component nano particles and a molecular sieve, the catalyst comprises metal active component nano particles are embedded and dispersed in the molecular sieve, the content of the active component nano particles in the catalyst is 2-70wt%, the particle size of the active component nano particles is 4-200nm, the crystal grain size of the molecular sieve is 1-10mu m; and the invention further discloses a preparation method and an application of the catalyst. The active metal in the catalyst disclosed by the invention is embedded and dispersed in the molecular sieve, the particle size is small; the metal active centre is effectively matched with an acid centre, the heavy constituent product can be effectively cracked; the catalytic activity is high, the metal reducibility is high, and the methane selectivity is low; the Fischer-Tropsch reaction activity cannot be reduced; the preparation process is simple, the cost is recued, and the catalyst is suitable for large industrial application; and the molecular sieve cannot break due to the difference of thermal coefficients of expansion, and the mechanical strength is high.

This invention describes the use of resveratrol and curcumin, representatives of naturally occurring polyphenols, in their native form, after hydrogenation, and as their respective allyl derivatives, individually, in combination with themselves and other commercial monomers, to make representative varieties of polymers, e.g., polycarbonates (PC), polyurethanes (PU), co-polymers and biodegradable polymers.

The invention relates to regenerative, solid sorbents for adsorbing carbon dioxide from a gas mixture, including air, with the sorbent including a modified polyamine and a solid support. The modified polyamine is the reaction product of an amine and an epoxide. The sorbent provides structural integrity, as well as high selectivity and increased capacity for efficiently capturing carbon dioxide from gas mixtures, including the air. The sorbent is regenerative, and can be used through multiple cycles of adsorption-desorption.

A process for preparing hydrofluoroether features the reaction between one of trifluoroethene, tetrafluoroethene, hexafluoro propene, etc and one of trifluoroethanol, trifluoropropanol, metanol, etc in organic solvent (DMF or DMSO). Its advantages are high output rate and easy purifying and separating.

The invention relates to a method for depolymerizing lignin into aromatic compounds under the conditions of no additional hydrogen. According to the method, biomass-base alcohol compound reformation hydrogen production reaction and lignin hydrodepolymerization reaction are combined; and in the reaction process, the biomass-base alcohol compounds are subjected to in-situ reformation hydrogen production, and meanwhile, the hydrogen is used for hydroepolymerizing lignin. The lignin is selectively cracked into C6-C9 aromatic compounds of phenolic group, guaiacol group, lilac group or other derivatives under the action of the catalyst. The conversion rate of the raw materials is up to higher than 50%, and the content of the guaiacol-group and lilac-group aromatic compounds in the cracked product can reach higher than 90%. The method uses the hydrogen prepared by biomass-base alcohol in-situ reformation as the hydrogen source, and avoids using high-pressure hydrogen in the preparation route; and thus, the method has the characteristics of high safety coefficient in the reaction process, high yield of the aromatic compounds, and mild reaction conditions.

An organosolv process for producing bio-products by decomposing lignocellulosic materials comprises providing an initial lignin solvent with water, an acid, and a lignin dissolving chemical comprising at least one of an organic ester, butyl acetate, an organic furan, and furfural. The process also includes placing the lignin solvent in contact with a biomass to form a circulation solvent, and recycling at least a portion of the circulation solvent by circulating the circulation solvent back into contact with the biomass. The circulating of the circulation solvent occurs for a period of time, after which, the process then includes separating material such as chemicals and lignin from the circulation solvent. The chemicals can be recycled as new solvent or sold while lignin can be used as natural and renewable colorant for polymers such as poly lactic acid.

The invention relates to a household garbage treatment method. According to the household garbage treatment method, the household garbage is subjected to thermal cracking to form mixed combustible gases containing carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), methane (CH4), nitrogen (N2) and inert argon (Ar) by a full gasification process; and the mixed combustible gas flow is purified and separated and then are used for synthesizing methanol and/or dimethyl ether, generating electricity and synthesizing urea. The household garbage treatment method comprises eight steps of: performing pyrolysis gasification, cooling, removing dust, performing deacidification and desulfuration, performing transformation reaction, adjusting the ratio of components, compressing and synthesizing. By adopting the method, the optimal ratio of the components required by the synthesis reaction can be adjusted, in particular the CO, the CO2, the H2 and the N2 can be comprehensively utilized, the N2 of an air separation device and the H2 of a purification system are synthesized to generate NH3, and the NH3 and the CO2 are synthesized to generate urea; biomass gas is used for generating electricity, so the heat efficiency can reach 30 to 40 percent; and by adopting the method, reclamation and zero emission of the household garbage can be realized.

The invention provides a method for preparing phenolic chemicals through the thermo-chemical conversion of industrial lignin. The method is as follows: under the common functions of solid acid catalyst and hydrogen supply solvent, industrial lignin performs atmospheric thermo-chemical conversion in high boiling point organic reaction medium to prepare homogeneous low molecular weight organic matter with rich phenolic compounds such as phenol, methoxyphenol, dimethoxyphenol and 2-methoxy-4-methylphenol, and the organic reaction medium is recycled through the technologies such as vacuum distillation. The method has simple process, good stability and low production cost; and the yield of the prepared phenolic compounds is more than 54%. The method plays an important role in the high-valued comprehensive utilization of the renewable resource, namely ndustrial lignin; and the converted phenolic chemicals can be used to synthesize phenolic resin, prepare high efficiency cement water-reducing agent and further separate, purify and prepare bio-chemicals. Particularly, by adopting the method, the lignin in papermaking black liquid and preparation residue of biological fuel ethanol prepared from cellulose can be converted to phenolic chemicals; and the method has wide application prospect.

The invention is based on the discovery that certain well-defined compounds derived from pentacyclopentadecane dimethanol are useful components in adhesive formulations. In particular, the invention compounds described herein provide high Tg values and low shrinkage. Compounds of the invention are useful as adhesives for use in the semiconductor packaging industry.

The present invention is directed generally to a method of production of value-added, biobased chemicals from lignin sources, including waste lignin. A method of using a depolymerization of lignin to create a tiered production of biobased aromatic chemicals and biofuels is also described herein. The method described herein may also allow for the selective production of the biobased aromatic chemicals and biofuels. Additionally, a reduction of waste products may also be provided from the present method.

The invention provides for a process for the depolymerization of lignin in an inert atmosphere to result in substituted phenolic monomer compounds. The process is catalysed by heterogeneous solid acid catalysts and is carried out in batch or continuous mode.

The present invention provides processes for selectively producing ethanol from syngas. In some variations, the process comprises converting biomass-derived syngas to dimethyl ether, carbonylating the dimethyl ether to methyl acetate, hydrogenating the methyl acetate to methanol and ethanol, and recovering the ethanol product. The methanol is preferably recycled by converting to hydrogen and carbon monoxide for introduction back into the process at distinct points. In certain variations of this invention, fresh syngas feed is introduced downstream of the first unit operation in the sequence. High yields of ethanol from biomass can be achieved according to the disclosed processes.

A method for utilizing woody biomass components, namely cellulose, hemicellose, and lignin, and converting them to value-added biobased chemical products is described herein. The present method provides treatments to obtain a plurality of component streams from woody biomass for producing derivative products while minimizing waste products.

A hydrogenation catalyst and a method of hydrogenating a hydrocarbon compound as a substrate using the same are provided. The hydrogenation catalyst includes inorganic nanoparticles and a nitrogen-doped reduced graphene oxide support for supporting the inorganic nanoparticles, and the hydrocarbon compound is derived from a biomass and contains a functional group. Therefore, the hydrogenation catalyst which exhibits a high conversion rate and high selectivity, is stable, and can be easily separated after a hydrogenation reaction, and whose catalytic activities are not significantly altered even when recovered and repeatedly recycled can be provided. The method of hydrogenating a hydrocarbon compound in which hydrogen can be directly produced in a reactor using formic acid as a hydrogen source without supplying additional hydrogen gas and simultaneously be used under normal pressure can also be provided.

The invention provides a comprehensive utilization method for coal. The coal is transformed into methane and other clean energy chemical products and/or clean power by integrating a multi-region coal gasification sub-method, a coal-based poly-generation sub-method, a composite power source hydrogen production sub-method and/or an algae carbon absorption sub-method, and an ecological cycle mode for development and utilization of coal resources is formed, wherein in the multi-region coal gasification sub-method, methane-containing gas flow is produced in the presence of a catalyst and a gasification agent by putting coal powder into a gasification furnace comprising a partial pyrolysis region, a catalytic gasification region and a residue gasification region. The invention also provides a system for implementing the comprehensive utilization method for coal.