摘要:
The invention relates to a method of obtaining polyoxygenated organic compounds. The inventive method is characterized in that it comprises the oxidation reaction of a diether, preferably an acetal, with an oxygen source, in the presence of: one or more radical initiating agents, one or more additives that generate a basic reaction medium, and one or more catalysts.
摘要:
A process for the reduction of ketones or aldehydes to alcohols has been developed. The process involves contacting the ketone or aldehyde with a primary or secondary alcohol and a catalyst at reduction conditions. The catalyst is a molecular sieve having the empirical formula: (MwSnxTiySi1-x-y-zGez)O2 where M is a trivalent metal such as aluminum or boron. These molecular sieves have a microporous three dimensional framework structure of at least SiO2 and SnO2 tetrahedral units, a crystallographically regular pore system and the characteristic x-ray diffraction pattern of zeolite beta.
摘要:
The invention relates to a method for the epoxidation of an olefinic compound, which is characterised in that it comprises an oxidation reaction of at least one olefinic compound containing one or more double bonds C═C with oxygen in the presence of one or more reaction initiating agents, at least one catalyst containing at least one metal that is selected from a noble metal, a transition metal and mixtures of same, and at least one hydrocarbon that is selected from one or more branched alkanes, one or more alkyl cyclic or cyclic hydrocarbons, one or more alkyl aromatic or aromatic compounds and mixtures of same.
摘要:
The invention relates to a method for extracting biochemical products obtained from a process of hydrothermal carbonization of biomass, which includes feeding an aqueous mixture of biomass from a preheating tube for the aqueous mixture of biomass to a vertical reactor with a predetermined level of floatation and an area for accumulation of steam and gases in the upper part thereof, wherein said method for extracting biochemical products is characterized in that it includes (a) heating the aqueous mixture of biomass to, or above, evaporation temperature in said vertical reactor and/or in a previous stage of preheating the aqueous mixture of biomass, increasing the generation of stream and/or gases at the predetermined flotation level of the vertical reactor, (b) extracting the steam and/or gases generated in the previous stage and accumulated in the upper part of the vertical reactor, and (c) cooling the gases and/or condensing the steam extracted in the previous stage at different levels of temperature and pressure. The invention likewise relates to the biochemical product obtainable from said method, as well as to a system for implementing said method.
摘要:
The invention relates to an aldehyde conversion method comprising putting an aldehyde into contact with oxygenated water and with a catalyst, under oxidation conditions, wherein the catalyst is a molecular sieve with pores of a diameter of at least 0.52 nm and has an empirical formula in a calcined and dehydrated form of (SnxTiySi1-x-y-zGez)O2 wherein x is a molar fraction of the tin and has a value between 0.001 and 0.1; y is a molar fraction of titanium and has a value from zero to 0.1; and z is the molar fraction molar of the germanium and has a value from zero to 0.08.
摘要翻译:本发明涉及醛转化方法,其包括在氧化条件下将醛与含氧水和催化剂接触,其中催化剂是直径为至少0.52nm的孔的分子筛,并且具有经验式 煅烧和脱水形式的<?in-line-formula description =“In-line Formulas”end =“lead”?(Sn x x Ti x Si x Si α-in-line-formula description =“In-line Formulas”end =“tail”?>其中x(x,y) 是锡的摩尔分数,其值在0.001和0.1之间; y是钛的摩尔分数,其值为0至0.1; z是锗的摩尔分数摩尔,其值为零至0.08。
摘要:
Applicants have developed a process for the oxidation of ketones to esters. The process involves contacting the ketone with hydrogen peroxide and a catalyst at oxidation conditions. The catalyst is a molecular sieve represented by the empirical formula: (MwSnxTiySi1−x−y−zGez)O2 where M is a trivalent metal such as aluminum or boron. These molecular sieves have a microporous three dimensional framework structure of at least SiO2 and SnO2 tetrahedral units, a crystallographically regular pore system and the characteristic x-ray diffraction pattern of zeolite beta.
摘要:
The invention relates to a method for extracting biochemical products obtained from a process of hydrothermal carbonization of biomass, which includes feeding an aqueous mixture of biomass from a preheating tube for the aqueous mixture of biomass to a vertical reactor with a predetermined level of floatation and an area for accumulation of steam and gases in the upper part thereof, wherein said method for extracting biochemical products is characterized in that it includes (a) heating the aqueous mixture of biomass to, or above, evaporation temperature in said vertical reactor and/or in a previous stage of preheating the aqueous mixture of biomass, increasing the generation of stream and/or gases at the predetermined flotation level of the vertical reactor, (b) extracting the steam and/or gases generated in the previous stage and accumulated in the upper part of the vertical reactor, and (c) cooling the gases and/or condensing the steam extracted in the previous stage at different levels of temperature and pressure. The invention likewise relates to the biochemical product obtainable from said method, as well as to a system for implementing said method.
摘要:
The present invention relates to a process for preparing phosphorus containing zeolite type catalysts based on crystalline aluminosilicates, the catalysts of this process and the use of these catalysts for the conversion of methanol to olefins.
摘要:
The invention relates to a laminar microporous crystalline zeolite material known as ITQ-30 which, as when synthesized, has a chemical composition in the anhydrous state with the following molar relations: x (M1/n XO2):y YO2:SiO2:z R, wherein: x represents a value less than 0.1, which can be equal to zero; y has a value of less than 0.1, which can be equal to zero; z has a value of less than 0.1; M is selected from among H+, NH4+, one or more +n inorganic cations and combinations of same; X represents one or more +3 oxidation state chemical elements; Y represents one or more +4 oxidation state chemical elements; and R represents one or more organic compounds. The invention also relates to the method of preparing said zeolite, involving the use of one or more organic additives in a reaction mixture which is crystallized by means of heating, and to the use thereof in processes for the separation and transformation of organic compounds.
摘要:
A process for providing methylene-bridged polyphenyl polyamines from aniline and formaldehyde according to the invention comprises the subsequent steps ofa) condensing aniline and formaldehyde, providing a condensate, the molar ratio of aniline to formaldehyde being chosen in the range of 2 to 3.5;b) reacting, in a first catalytic reaction step, at a reaction temperature within the range of about 30° C. to about 100° C., said condensate over a solid catalyst being chosen from the group consisting of clays, silicates, silica-aluminas and ion exchange resins, whereby an intermediate mixture is provided, the intermediate mixture comprising amino benzyl amines;c) converting, in a subsequent catalytic reaction step, at a temperature within the range of about 70° C. to about 250° C., the reaction temperature in said subsequent catalytic reaction step is higher than the reaction temperature in said first catalytic reaction step, said intermediate mixture into methylene-bridged polyphenyl polyamines in presence of a subsequent solid catalyst being chosen from the group consisting of zeolites, delaminated zeolites and ordered mesoporous materials, thereby providing said methylene-bridged polyphenyl polyamines.