1250results about "Preparation by carbon monoxide reaction" patented technology

The present invention generally relates to biochemical and chemical industry, and more particularly to a method which can be used in fermenting carbohydrate substrates of plant origin for producing C₁-C₅ alcohols, and for synthesis of higher alcohols, other oxygen-containing compounds and hydrocarbons as well as for the production of motor fuel components from biomass. Since C₆ and higher alcohols, ethers, acetals, and higher hydrocarbons are not obtainable by a direct biochemical route, it is proposed to synthesize these using known chemical reactions, wherein by-products of fermentation are as raw materials for said synthesis.

The present invention relates to catalyst system for propylene hydrogenation and formylation and process of catalytically synthesizing butyl aldehyde. The catalyst system is triaryl phosphine-Rh(I) catalyst system with proper additive, such as bisphosphite ester, in proper amount. Compared with similar available catalyst, the catalyst system has obviously higher catalytic acitivity, higher selectivity, higher stability and raised n-butyl aldehyde/isobutyl aldehyde ratio in the catalytically synthesized product.

Low melting ionic compounds of the general formula (cation) (R′SO₄) in which R′ is a branched or linear, saturated or unsaturated, aliphatic or alicyclic functionalized or non-functionalized hydrocarbon chain with 3-36 carbon atoms are provided. These compounds can serve as ionic liquids, e.g. as solvents or solvent additives in chemical reactions, as extraction agents or as heat carriers. The compounds comprise a cation and anionic sulfate ester.

The invention relates to an olefin two-phase hydroformylation method, which consists of three parts: polyether guanidine mesylate ionic liquid (PGMILs) with room temperature solidifiable characteristics, complex catalysts (Rh-TPPTS) formed by RhCl3.3H2O or dicarbonylacetylacetonato rhodium and triphenylphosphine sodium trithionate (TPPTS), and reactants of C6-C14 straight chain 1-olefin, wherein the Rh-TPPTS is dissolved in the PGMILs to form a lower layer catalyst phase, the C6-C14 straight chain 1-olefin or product aldehyde forms an upper layer organic phase, the selectivity of high-carbon aldehyde is 85 to 99 percent, the mol ratio of normal aldehyde to isomerism aldehyde is 2.0 to 2.4, the PGMILs phase containing Rh-TPPTS can be cyclically used for 35 times, the activity and the selectivity are unchanged, the accumulated conversion number (TON) reaches higher than 30000, rhodium flowing to the product phase is 0.04 percent to 0.07 percent, and ultra-long-period catalysis activity and selectivity can be realized.

PCT No. PCT/EP96/00163 Sec. 371 Date Oct. 15, 1997 Sec. 102(e) Date Oct. 15, 1997 PCT Filed Jan. 17, 1996 PCT Pub. No. WO96/22265 PCT Pub. Date Jul. 25, 1996A dilute ethylene stream, e.g., one produced by steam cracking, is oxonated to yield propanal, without the need to separate other lower hydrocarbons.

Supported bis(phosphorus) ligands are disclosed for use in a variety of catalytic processes, including the isomerization, hydrogenation, hydroformylation, and hydrocyanation of unsaturated organic compounds. Catalysts are formed when the ligands are combined with a catalytically active metal, such as nickel.

A chemical processing microsystem useful for identifying and optimizing materials (e.g., catalysts) that enhance chemical processes or for characterizing and/or optimizing chemical processes is disclosed. The chemical processing microsystem comprises a plurality of microreactors 600 and, in a preferred embodiment, a plurality of microseparators 900 integral with the chemical processing microsystem 10. The microreactors 600 are preferably diffusion-mixed microreactors formed in a plurality of laminae that include a modular, interchangeable candidate-material array 100. The material array 100 comprises a plurality of different candidate materials (e.g., catalysts), preferably arranged at separate, individually addressable portions of a substrate (e.g., wafer). The microseparators 900 are similarly formed in a plurality of laminae that include a modular, interchangeable adsorbent array 700. The adsorbent array 700 comprises one or more adsorbents, preferably arranged at separate, individually addressable portions of a substrate to spatially correspond to the plurality of different candidate materials. Modular microfluidic distribution systems are also disclosed. The chemical processing microsystem can be integrated into a material evaluation system that enables a comprehensive combinatorial material science research program.

A process for the production of 4-hydroxybutyraldehyde is described. The process comprises reacting allyl alcohol with a mixture of carbon monoxide and hydrogen in the presence of a solvent and a catalyst system comprising a rhodium complex and a 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis[bis(3,5-di-n-alkylphenyl)phosphino]butane. The process gives high yield of 4-hydroxybutyraldehyde compared to 3-hydroxy-2-methylpropionaldehyde.

A modified activated carbon supported rhodium type catalyst for high carbene hydrocarbon hydrogen formylation reaction is provided. The preparation of the catalyst comprises the techniques such as carrier pretreatment-activity rhodium solid-phase bound reagent combination, and used for gas-liquid-solid three phase catalyst system, which is characterized in that: a certain amount of alkali or alkaline earth metal hydroxide and salt modification activated carbon is used as a carrier, and the supported rhodium catalyst is prepared by using multiple impregnation method. The catalyst of the present invention is high in activity and selectivity. The catalyst is easy to be separated from products after reaction, capable of being used repeatedly, stable in performance, and suitable for the production process of high carbene hydrocarbon or mixed olefin hydrogen formylation made high carbon aldehyde, which has good industrial application value.

An ionic liquid according to the invention is substantially halogen-free, has a low viscosity and is stable to hydrolytic degradation under test conditions. The ionic liquid is a compound of the formula (cation) (R′—O—SO₃), (cation) (R′—SO₃), or a mixture of the two compounds. It can be used in processes for the chemical conversion and separation of materials by employing the ionic liquid as a solvent, solvent additive, extraction agent or phase-transfer catalyst. It can also be used in a heat exchange device wherein the ionic liquid serves as a heat carrier or heat carrier additive.

Phosphinines of formula (I) can be combined with metal salts to prepare hydroformylation catalysts. The phosphinine complexes have two phosphorus centers that may be substituted with a variety of hetero atoms or alkyl substituents to modify the ligand characteristics of the phosphinine. Phosphinine metal complexes are employed under normal hydroformylation reaction conditions. The preparatory routes to the phosphinine ligands of formula (I) allow for their convenient synthesis.

The invention relates to a propylene hydroformylation catalyst system and a method for catalyzing synthesis of butyraldehyde. In the present invention, in the propylene hydroformylation reaction system catalyzed by triarylphosphine-Rh(I), by using appropriate types and quantities of additives, such as bisphosphite, the performance of the Rh(I)/triarylphosphine catalyst can be significantly improved The activity and the positive-iso ratio of butyraldehyde in the product (molar ratio of n-butyraldehyde/isobutyraldehyde>20), and significantly prolong the service life of the bisphosphite ligand, and significantly reduce the amount of triarylphosphine. This type of catalyst system is characterized by higher activity and selectivity than third-generation Rh(I)/triphenylphosphine catalysts and better stability than fourth-generation Rh(I)/bisphosphite catalysts, so The novel catalyst system provided by the present invention can overcome the shortcomings of the third and fourth generation catalysts, reduce the cost of industrialized production of propylene hydroformylation, and provide a new catalyst technology for its industrial application.

The invention relates to an oxo-synthesis reaction method, particularly a method for preparing pentanal from mixed butylenes by a two-stage hydroformylation reaction. The method comprises the steps that after a first-stage hydroformylation is carried out with mixed butylenes containing 1-butylene and 2-butylene as raw materials, the reaction product containing catalyst in the discharged material is separated; the unreacted material is subjected to a second-stage hydroformylation reaction; catalyst in the two-stage products is separated and returned to two reaction vessels according to a certain proportion. The method solves the problem of reaction difference of two olefins, improves olefin utilization efficiency and reduces production cost; and is applied in a petrochemical field.

A process for preparing aliphatic alcohols that includes cobalt-catalyzed hydroformylation of olefins, treatment of a hydroformylation mixture with oxygen-containing gases in the presence of acidic, aqueous cobalt(II) salt solutions, separation of a mixture into an aqueous phase comprising cobalt salts and an organic phase comprising the aliphatic aldehydes, and hydrogenation of an aldehyde-containing organic phase wherein the organic phase and treatment with an adsorbent to separate off cobalt compounds prior to hydrogenation.

The invention relates to a method for preparing aldehyde through linear chain olefin hydroformylation. According to the method, a continuous reaction mode is used for performing olefin hydroformylation reaction in a homogeneous catalyst system; a catalyst is a composite catalysis system composed of a rhodium complex, a biphenyl backbone or biphenyl backbone diphosphine ligands and triphenylphosphine or triphenyl phosphate monophosphorous ligands; a reaction solvent comprises butyraldehyde, valeraldehyde, toluene or isodecanol; when the catalyst system uses propylene or butene-1 as raw materials under the condition of a low molar ratio of the diphosphine ligands to the rhodium complex, contents of the aldehyde generated by hydroformylation of the propylene and the butene-1 is larger than 97% and 95% respectively; and when the catalyst system uses a mixture of the butene-1 and butene-2 as raw materials, and the content of n-valeraldehyde in hydroformylation reaction products can reach above 85%.

The invention discloses a high-selectivity method for preparing linear-chain aldehyde. According to the method disclosed by the invention, a phosphine-containing organic polymer self-loaded type high-dispersity metal catalyst is used, and olefin hydroformylation reaction is used for preparing the linear-chain aldehyde in a high-selectivity manner. The organic polymer self-loaded type catalyst takes one, two and three of metal Rh, Co, Pd, Ir and Rt as active components and a phosphine-containing organic polymer is used as a carrier, wherein the phosphine-containing organic polymer carrier is formed by co-polymerizing or self-polymerizing a multi-dentate organic phosphine ligand and a single-dentate organic phosphine ligand. The phosphine-containing organic polymer self-loaded type high-dispersity metal catalyst provided by the invention is applied to reactors including fixed beds, slurry beds, bubbling beds, trickle beds and the like. The method disclosed by the invention has very goodpresentation in the olefin hydroformylation reaction and can be used for producing a target product linear-chain aldehyde in the high-selectivity manner.