26 results about "Glycolaldehyde" patented technology

Various processes for the pyrolysis of carbohydrates to prepare products such as glycolaldehyde are described. Also, various catalysts and processes for preparing catalysts useful for carbohydrate pyrolysis are described.

The invention discloses a glycolaldehyde synthetase mutant and application of the glycolaldehyde synthetase mutant in improving the thermal stability of glycolaldehyde synthetase, and belongs to the technical field of biological catalysis application. According to the glycolaldehyde synthetase mutant disclosed by the invention, on the basis of an amino acid sequence as shown in SEQ ID NO.1, the glycolaldehyde synthetase mutant has the following mutations: A381P / E509F, A381P / K290P, A381P, S61A, A381P / K290P / E509F, A381P / C49A, A381P / T100V, A381P / S61A or A381P / K290P / S61A. The mutant protein can catalyze formaldehyde to prepare hydroxyacetaldehyde (glycolaldehyde). In addition, the mutant protein can also improve the catalytic efficiency from formaldehyde to glycolaldehyde, and due to the improvement of the thermal stability, continuous catalysis of industrial enzyme in actual reaction is facilitated, so that the mutant has a good industrial application prospect.

The invention discloses an application of a Pd / TiO2 photocatalyst in preparation of glycolaldehyde by selective oxidation of glycerol, and in the Pd / TiO2 photocatalyst, the particle size range of Pd is 0.5-25 nm. The Pd / TiO2 photocatalyst is used for preparing glycolaldehyde through selective oxidation of glycerol, the particle size of Pd is regulated and controlled, then the adsorption configuration of glycerol molecules is regulated and controlled, selective fracture of C-C bonds is promoted, along with increase of the particle size of Pd, the glycerol conversion rate, the glycolaldehyde selectivity and the formation rate are in a remarkable rising trend, and the stability is good and is far superior to that of an existing reported catalytic system.

A process for the manufacture of ethyleneamines and ethanolamines, comprising the steps of (i) converting a glycolaldehyde derivative of formula (II), in which R2, R3 are—the same or different—hydrogen, alkyl, such as C1-6-alkyl, or cycloalkyl such as Cs-e-cycloalkyl; and an animating agent of formula (III); in which R1 is hydrogen (H), alkyl, such as C1-6-alkyl, or cycloalkyl such as C3-6-cycloalkyl, in the gas or liquid phase; (ii) feeding the reaction products obtained in step (i) into a hydrogenation reactor, where the reaction products are converted with hydrogen in the presence of a hydrogenation catalyst.

This invention discloses a mutant of glycolaldehyde synthase and its application in improving the thermostability of glycolaldehyde synthase, belonging to the field of biocatalysis application technology. The glycolaldehyde synthase mutant disclosed in this invention, based on the amino acid sequence shown in SEQ ID NO.1, contains the following mutations: A381P / E509F, A381P / K290P, A381P, S61A, A381P / K290P / E509F, A381P / C49A, A381P / T100V, A381P / S61A, or A381P / K290P / S61A. This mutant protein can catalyze the preparation of hydroxyacetaldehyde (glycoaldehyde) from formaldehyde. The mutant protein of this invention also improves the catalytic efficiency of the formaldehyde-to-glycoaldehyde conversion. Due to the improved thermostability, it is beneficial for continuous catalysis in actual industrial reactions, thus the mutant shows good prospects for industrial applications.

Various processes for preparing C4 aldoses and / or ketones thereof are described. Various processes are described for preparing C4 aldoses and / or ketones thereof from feed compositions comprising glycolaldehyde. Also, various processes for preparing useful downstream products and intermediates, such as erythritol and erythronic acid, from the C4 aldoses and / or ketones thereof are described.

An improved method for preparing polyethylene glycol acetal and aldehyde derivative, and the polyethylene glycol acetal derivative is represented by formula (1) or formula (2) used to preparing a series of linear and nonlinear polyethylene glycolaldehyde derivatives with a single aldehyde group or multiple aldehyde groups, and with high yield, high purity and high terminal substitution, using a small-molecule cyclic acetal derivative and a polyethylene glycol derivative as raw materials in the presence of a base reagent derivative.

The application discloses a formaldehyde lyase mutant and application thereof. The formaldehyde lyase mutant provided by the application can regulate the generation proportion of a two-carbon and three-carbon product generated by catalyzing formaldehyde condensation, has improved activity of catalyzing formaldehyde condensation into glycolaldehyde, and reduced activity of catalyzing formaldehyde condensation into 1,3-dihydroxyacetone, compared with formaldehyde lyase.

The present invention relates to a process for the pyrolysis of carbohydrates. Various methods for the pyrolysis of carbohydrates to produce a product, such as glycolaldehyde, are described. In addition, various catalysts and methods for preparing catalysts useful for the pyrolysis of carbohydrates are described.

The invention relates to a process for preparing (hetero)aromatic compounds substituted with a hydroxyethylamino group (B) from aromatic compounds bearing an amino group (A) in the presence i) of (di)(alkyl)glycolaldehyde dimer and ii) in a reduction medium, it being understood that step i) and ii) are performed simultaneously or as a "one pot" reaction.

The invention relates to a process for preparing (hetero)aromatic compounds substituted with a hydroxyethylamino group (B) from aromatic compounds bearing a nitro(so) group (A) in the presence i) of (di)(alkyl)glycolaldehyde dimer and ii) in a reduction medium, it being understood that step i) and ii) are performed simultaneously or as a "one pot" reaction.

A method for the production of 2,5-furandicarboxylic acid (FDCA) comprising contacting glucose with a catalyst composition under conditions suitable for the formation of glucarate; acidifying glucarate to form glucaric acid; dehydrating glucaric acid to form FDCA; and recovering FDCA. A method for the production of 2,5-furan dicarboxylic acid dimethyl ester (FDME) comprising contacting glucose with a catalyst composition under conditions suitable for the formation of glycolaldehyde; contacting glycolaldehyde with a transition metal oxidation catalyst under conditions suitable for the formation of glucaric acid; esterifying glucaric acid to form glucaric acid methyl ester; dehydrating the glucaric acid methyl ester to form FDME; and recovering FDME.

Various methods for the pyrolysis of carbohydrates to produce products such as glycolaldehyde are described. In addition, various catalysts and methods for making catalysts useful for the pyrolysis of carbohydrates are described.

The invention discloses a preparation method of glycolaldehyde dimer, which comprises the following step: in the presence of a titanium-silicon catalyst and an organic alkali assistant, carrying out contact reaction on hydrogen peroxide, a solvent and ethylene. According to the method disclosed by the invention, ethylene is used as a raw material, hydrogen peroxide is used as an oxidant, and a titanium-silicon catalyst and an organic alkali aid are used, so that the glycolaldehyde dimer with high added value can be generated through catalytic reaction. According to the method, the raw material ethylene is easy to obtain, the hydrogen peroxide is low in price, the supported titanium silicalite molecular sieve is cheaper than a rhodium catalyst and is not easy to inactivate, the solvent can be recycled, and the target product is high in selectivity.

A method for the production of glycolic acid comprising contacting ethylene glycol with an oxidase catalyst system under conditions suitable for the formation of glycolaldehyde; contacting glycolaldehyde with one or more metal oxidation catalysts under conditions suitable for the formation of glycolic acid; and recovering at least a portion of the glycolic acid. A method for the production of glycolic acid comprising contacting ethylene glycol with an oxidase catalyst system comprising galactose oxidase under conditions suitable for the formation of glycolaldehyde; contacting glycolaldehyde with an oxidation catalyst comprising gold on a carbon support under conditions suitable for the formation of glycolic acid; and recovering at least a portion of the glycolic acid.

The invention provides enzyme cross-linked polyvinyl protocatechuic aldehyde hydrogel as well as a preparation method and application thereof. The hydrogel is prepared from a cross-linked substance formed by a matrix and the balance of water or a phosphate buffer solution, the matrix is a polyvinyl protocatechuic aldehyde solution, and a cross-linking agent of the matrix is an enzyme catalysis system solution of horseradish peroxidase / hydrogen peroxide combination; the hydrogel has photo-thermal responsiveness to near infrared rays, and preferably, the hydrogel has photo-thermal responsiveness to near infrared rays with the wavelength of 808 nm. The hydrogel material is easy to prepare, green in synthesis and good in biological safety, the advantages of polyvinyl alcohol and protocatechualdehyde are combined, polyvinyl protocatechualdehyde is synthesized, and photo-thermal response type hydrogel is rapidly formed through catalysis of horseradish peroxidase / hydrogen peroxide. Extra photo-thermal corresponding materials do not need to be added, and the effects of rapidly killing bacteria at the wound part and promoting the wound to heal can be achieved by combining the characteristics of oxidation resistance, bacteria resistance and the like of the hydrogel and adopting a photo-thermal therapy method.

A process for the conversion of glycolaldehyde with an aminating agent in the presence of hy-5 drogen and of a catalyst, wherein the conversion is carried out in the gas phase.

The invention relates to phosphoketolase MaPKT and SzPKT with a function of catalyzing formaldehyde to synthesize acetyl phosphate and application of phosphoketolase MaPKT and SzPKT in CO2 biosynthesis of ethanol, and belongs to the technical field of enzyme mining and biological catalysis application. A phosphoketolase specific protein sequence database and an oligopeptide module sequence library are established through an oligopeptide module recognition (PPR) technology, two phosphoketolase PKTs capable of catalyzing formaldehyde to synthesize acetyl phosphate are efficiently and accurately excavated, further research finds that the formaldehyde tolerance of MaPKT is improved, and the catalytic efficiency of MaPKT on formaldehyde is 8 times that of glycolaldehyde. Based on this, the invention also constructs an efficient condensation approach for synthesizing ethanol by artificially biologically converting CO2, and has potential application prospects.

A method for the production of higher value chemicals comprising pyrolyzing one or more sugar oxidation products in the absence of oxygen under conditions suitable for the formation of a reaction mixture comprising from about 1 wt.% to equal to or greater than about 50 wt.% glycolaldehyde based on the total weight of the reaction mixture; and recovering at least a portion of the glycolaldehyde. A method for the production of higher value chemicals comprising; pyrolyzing reactants comprising glucodialdose, 2-keto-D-glucose or both in the absence of oxygen under conditions suitable for the formation of a reaction mixture comprising from about 1 wt.% to equal to or greater than about 50 wt.% glycolaldehyde; recovering at least a portion of the glycolaldehyde to obtain recovered glycolaldehyde; and purifying the recovered glycolaldehyde to obtain a purity of from about 70% to about 85% to obtain purified glycolaldehyde.

The present invention relates to a process for producing a foam, which comprises foaming a mixture, comprising one or more poly (amino acid) (A), one or more components (B) capable of reacting with said poly (amino acid) (A), wherein component (B) is selected from reducing sugars, 1,3-dihydroxyacetone, glycolaldehyde, glyceraldehyde or any mixture thereof and one or more blowing agents (F) and the foam obtainable by this process.

Selective hydrogenation processes are disclosed that can upgrade impure feeds, such as those obtained from biomass and containing a number of small (e.g., 2-6 carbon atom) molecules having aldehyde and / or ketone carbon atoms. For example, whereas glycolaldehyde and its methylated derivative, hydroxyacetone (acetol) are both high value intermediates for certain downstream processing reactions, they are normally recovered in a condensate from pyrolysis of carbohydrates (e.g., aldose-containing sugars) together with glyoxal and its methylated derivative, pyruvaldehyde. The selective hydrogenation of these compounds bearing two carbonyl carbon atoms, without over-hydrogenation to ethylene glycol and propylene glycol, can increase the concentration of the desired intermediates. These beneficial effects of selective hydrogenation may be achieved through the use of a hydrogenation catalyst comprising noble metals such as Ru and Pt.

Polymers and copolymers and compositions containing one or more such polymers and copolymers. The polymers and copolymers comprise two or more glycolaldehyde dimers of different structures as monomer units. Exemplary dimers are 2, 5-dihydroxy-1, 4-dioxane, (1, 2-hydroxyethoxy) acetaldehyde, 2-(hydroxymethyl)-1, 3-dioxolane-4-ol, 1, 1 '-oxybis (ethane-1, 2-diol), 2, 2'-oxybis (ethane-1, 1-diol), (1, 3-dioxetan-2, 4-diyl) dimethanol, and 2, 2 '-oxydiacetaldehyde. Copolymers containing two or more glycolaldehyde dimers have improved optical and mechanical properties.

Polymer and copolymers and compositions containing one or more of such polymers and copolymers. Polymers and copolymers comprise two or more structurally different glycolaldehyde dimers as monomer units. Exemplary glycolaldehyde dimers are 2,5-dihydroxy-1,4-dioxane; (1,2-hydroxyethoxy) acetaldehyde; 2-(hydroxymethyl)-1,3-dioxolan-4-ol; 1,1′-oxydi(ethane-1,2-diol); 2,2′-oxydi(ethane-1,1-diol); (1,3-dioxetane-2,4-diyl)dimethanol; and 2,2′-oxydiacetaldehyde). Copolymers containing one or more glycolaldehyde dimers and a second monomer that is not a glycolaldehyde dimer are also provided. Copolymers exhibit improved optical and mechanical properties.

The invention relates to a method for production of acetyl phosphate from renewable or next generation feedstocks, comprising enzymatically converting a non-phosphorylated carbohydrate into acetyl phosphate and a product, with a phosphoketolase. In embodiments, the phosphoketolase comprises at least one mutation in its active site preferably enabling an increased affinity and / or increased phosphoketolase activity for a non-phosphorylated carbohydrate, such as i) D-fructose, (ii) D-erythrulose or (iii) glycolaldehyde, compared to a wild- type phosphoketolase sequence. The invention further relates to a phosphoketolase enzyme comprising in its active site the mutation(s) H548N, N549D, H256Y, T2A:16T:H260Y:H548N, H548Y, H260Y:H548Y, H256Y:H260Y:H548Y, H142N:E153D and / or T2A:16T:H260Y:H548Y and its use for producing acetyl phosphate from a non-phosphorylated carbohydrate. The invention further relates to non-human organisms, preferably a microorganism, comprising a gene encoding and optionally expressing said phosphoketolase enzyme and compositions comprising the same.