34results about How to "Low hydrolysis temperature" patented technology

The invention relates to a preparation method of a biological enzyme, particularly relates to a biological enzyme preparation method of natural brassinolide. The method includes: steps of inoculationfermentation, pressure filtration, ultrafiltration, emulsification, enzymolysis, extraction, pressure filtration, concentration, resin absorption, concentration crystallization, vacuum filtration, drying and packaging. The invention has advantages of simple process method, low energy consumption in production process, high product purity and environmental conservation.

The invention discloses carbon microsphere solid acid formed by one-step fructose hydrothermal synthesis and applied to a catalyzed hydrolysis process of cellulose, and belongs to the field of conversion and utilization of biomass resources and energy. A carbon microsphere solid acid catalyst disclosed by the invention has the molecular formula of CH0.0847O0.523S0.00840. The preparation conditions of the catalyst are mild; through one-pot reaction of fructose and sulfo salicylic acid under the hydrothermal condition of 150 DEG C, the preparation of solid microspheres and the loading of sulfo groups are realized simultaneously; the defects that a large amount of concentrated sulfuric acid is used and a large amount of sulfuric acid waste liquid is produced in a conventional process of preparing the solid acid by soaking the concentrated sulfuric acid by using activated carbon are overcome. The prepared carbon microsphere solid acid has high the catalytic activity on the hydrolysis of the cellulose. The solid acid catalyst has mild preparation conditions, no pollution, no corrosion and high activity, and can be used repeatedly for the hydrolysis of the cellulose. The carbon microsphere solid acid is prepared from the fructose and is applied to efficient hydrolysis of the cellulose; a new way is provided for the high value of the biomass resources.

A method for preparing D-glucosamine hydrochloride includes the steps: placing chitin into a reaction tank, adding hydrochloric acid with stirring and heating the reaction tank for hydrolysis; uninterruptedly leading hydrochloric acid gas into hydrolysate in backflow hydrolysis; obtaining a solid crude product after cooling, precipitating and leaching the hydrolysate; adding deionized water and activated carbon into the crude product for decolorization prior to filtering so that faint yellow liquor is obtained; and the hydrochloric acid is recovered by means of vacuum concentration, obtaining a wet refined product by centrifugally dewatering concentrated materials and washing the wet refined product in alcohol prior to vacuum drying so that finished product crystals are obtained. Since the hydrochloric acid gas is led into the hydrolysate, the concentration of the hydrochloric acid of the hydrolysate is kept stable, a hydrolysis process is accelerated, and time for hydrolysis reaction is shortened. Besides, by the aid of increase of the hydrochloric acid concentration, the hydrolysis temperature can be decreased, and decomposition of the D-glucosamine hydrochloride is reduced. By the aid of the method, yield is increased, quality of the D-glucosamine hydrochloride is improved, and energy consumption and production cost are reduced.

The invention relates to the field of medical chemistry, in particular to a preparation method of narrow-distribution medium-molecular-weight hydroxyethyl starch. The method comprises the following steps of: dispersing wax corn starch with purified water, and hydrolyzing with an inorganic acid; performing gradient temperature change control and controlling the hydrolyzing degree by using dynamic viscosity; and performing hydroxyethylation, carbon removing filtration, ultrafiltration and spray drying on a hydrolysate to obtain a narrow-distribution medium-molecular-weight hydroxyethyl starch raw material. According to the method, the weight average molecular weight of the medium-molecular-weight hydroxyethyl starch is controlled more accurately, and the molecular weight distribution is more concentrated.

The invention discloses a new hair hydrolyzing process comprising three steps, i.e. hair treatment before hydrolysis, acid hydrolysis and alkali neutralization for adjusting isoelectric point so as to precipitate corresponding amino acid. The method is characterized in that the conditions for the acid hydrolysis are as follows: acid solution is trichloroacetic acid aqueous solution, acid concentration is 3-8 mol / L, the temperature of the acid hydrolysis is 60-80 DEG C, the time of the acid hydrolysis is 7-9 h, and the mass ratio of the hair and the trichloroacetic acid is 0.1-3. The conditions for the acid hydrolysis not only realizes the aim of obtaining the amino acid during hair hydrolysis, but also can obtain clear and transparent hair hydrolysa, thereby solving the problem that black hydrolysa in the prior art affects the accurate control and adjustment of the isoelectric point of various amino acids after hydrolysis. In addition, the temperature of the acid hydrolysis is low, thereby not only saving energy during production but also avoiding the generation of a few secondary reactions, and not only improving the yield rate but also being favorable for the separation and purification of the amino acid.

The invention discloses a method for preparing butyl alcohol by using green soy bean straws, and belongs to the technical field of biomass energy. The butyl alcohol is prepared by the steps of drying, crushing, pretreating, hydrolyzing and fermenting the green soy bean straws. The method disclosed by the invention is wide in raw material source and low in cost of preparing butyl alcohol, has a high glucose conversion rate, and generates a small amount of residues, so that the method is a green and environment-friendly process. Compared with fuel prepared by a petroleum refining method, the biofuel, namely butyl alcohol, prepared by the method disclosed by the invention has a significant environmental protection effect and can effectively reduce the emission of room temperature gases. Meanwhile, the method also provides a new solution for solving the problem of shortage of energy.

The invention discloses a method of preparing butanol from corn straw, and belongs to the technical field of biomass energy. The butanol is obtained through the following steps: drying corn straws, grinding, and carrying out pretreatment, hydrolysis, and fermentation. The raw material sources are wide, the preparation cost is low; the sugar conversion rate is high, the generated residue amount is little, the technology is green and environment-friendly; compared with the fuel obtained through petroleum refining, the biological fuel namely butanol has a prominent environment-friendly effect, and the discharge of greenhouse gas is effectively reduced. At the same time, the problem of energy shortage is solved.

The present invention relates to a continuous process method for preparing hydroquinone. The method comprises the following steps: (1) adding a sodium nitrite aqueous solution to a sulfuric acid solution of para-aminophenol in a dropwise manner to carry out a diazotization reaction to obtain a dark brown diazo solution; (2) continuously feeding methyl isobutyl ketone from the bottom, continuously feeding a copper sulfate solution from the middle part, collecting extraction residue water from the bottom, collecting an extraction oil layer from the upper overflow port, adjusting flow and in-out balance, and then continuously feeding a diazo solution from the middle part, wherein the extraction oil layer is subjected to precipitation, decoking and crystallization to obtain the hydroquinone finished product.

The invention discloses a new hair hydrolyzing process comprising three steps, i.e. hair treatment before hydrolysis, acid hydrolysis and alkali neutralization for adjusting isoelectric point so as to precipitate corresponding amino acid. The method is characterized in that the conditions for the acid hydrolysis are as follows: acid solution is trichloroacetic acid aqueous solution, acid concentration is 3-8 mol / L, the temperature of the acid hydrolysis is 60-80 DEG C, the time of the acid hydrolysis is 7-9 h, and the mass ratio of the hair and the trichloroacetic acid is 0.1-3. The conditions for the acid hydrolysis not only realizes the aim of obtaining the amino acid during hair hydrolysis, but also can obtain clear and transparent hair hydrolysa, thereby solving the problem that blackhydrolysa in the prior art affects the accurate control and adjustment of the isoelectric point of various amino acids after hydrolysis. In addition, the temperature of the acid hydrolysis is low, thereby not only saving energy during production but also avoiding the generation of a few secondary reactions, and not only improving the yield rate but also being favorable for the separation and purification of the amino acid.

The invention discloses a method for preparing butanol by rice straws, and belongs to the technical field of biomass energy. The rice straws are dried, crushed, pretreated, hydrolyzed and fermented to obtain the butanol. Raw material sources are extensive, and butanol preparation cost is low. The method is simple in preparation process, less in investment and suitable for large-scale popularization and application. The bio-fuel butanol prepared by the method has a remarkable environment-friendly effect as compared with a fuel prepared by a petroleum refining method, and emission of greenhouse gas can be effectively reduced. Besides, a novel scheme is provided for solving the problem of energy shortage.

The invention relates to the technical fields of leather making chemistry and engineering, and provides a method for preparing a modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather shavings. The method of leather filler can reduce the environmental pollution caused by tanning, solve the problem of difficulty in handling leather scraps in enterprises, and at the same time can save resources, save the cost of tanning, and improve the economic benefits of enterprises; the modified collagen polypeptide prepared by the method The tanning filler has moderate molecular weight, high hydrolysis yield, positive electricity and antibacterial and mildew resistance. It can avoid the discoloration of leather when applied in the tanning process, and can promote the absorption of other anionic materials in the tanning process. Moldy.

The invention discloses a double-circulation furfural production system, and technology. The technology comprises following steps: 1, corn cob and low concentration acetic acid are subjected to hydrolysis reaction so as to obtain a mixed solution of xylose and acetic acid, wherein the concentration of the low concentration acetic acid is controlled to be 1 to 2%, v / v; 2, acetic acid, sodium chloride, and o-nitroanisole are added into the mixed solution of xylose and acetic acid obtained in step 1, wherein the acetic acid concentration is controlled to be 3 to 6%, v / v, the sodium chloride concentration is controlled to be 5 to 10% by mass, the volume ratio of o-nitroanisole to the mixed solution is controlled to be 1:0.8-1.2, and in the reaction process, the reaction system is stirred continuously; 3, after reaction, the obtained reaction system is allowed to stand for a preset time period for layering, an upper layer water phase is recycled back into the step 1 to provide an acidic environment for corn cob hydrolysis, and a lower layer extracted phase is conveyed into a distillation column for separation of crude furfural and o-nitroanisole; and 4, the o-nitroanisole obtained through separation is recycled back into the step 3.

The invention discloses a method for utilizing rosa banksiae to co-produce ethyl alcohol, acetone and butanol and belongs to the technical field of biomass energy. The ethyl alcohol, the acetone and the butanol are prepared through the steps of rosa banksiae drying, smashing, pretreatment, hydrolysis, fermentation and the like. The raw material is wide in source, and the cost for co-producing the ethyl alcohol, the acetone and the butanol is low. The glucose conversion rate of the butanol prepared by means of the method is 92.22%-92.93%, the yield of the butanol is 66.54%-67.57%, the purity of the butanol is 99.59%-99.71%, it is shown that the glucose conversion rate and the yield of the butanol are high, and the high-yield ethyl alcohol, acetone and butanol can be achieved by means of the method. By the adoption of the method, a variety of new energy resources can be co-produced, and a new solution is provided for the energy shortage problem.

The invention discloses a method for preparing ethyl alcohol from Chinese gooseberry stems, and belongs to the technical field of biomass energy. The ethyl alcohol is prepared from the Chinese gooseberry stems through the steps of drying, pulverization, pretreatment, hydrolysis, fermentation and the like. The uncertainty of a microbial enzyme fermentation sugar making process can be avoided, and the technical risk is lowered. The glucose conversion rate is high; the generated residue quantity is small; the method belongs to a green and environmentally-friendly process. The preparation process is simple; the investment is low; the method is suitable for large-scale popularization and application.

The invention discloses a method for washing a CPF-PT series type melt filters and aims at solving the defects in the prior art that solvents are used for washing the filters in an existing method for washing the CPF-PT series type melt filters, so that the pollution to the environment is caused and a certain risk is caused; due to the application of vacuum calcinations, the destructive influence on the filters is caused, and thus the service life of filter elements is shortened. By virtue of the method, a polymer is quickly hydrolyzed in the presence of high-temperature steam so as to generate compounds which are low in molecular weight, so that the macromolecular compounds are high in viscosity and adhesion, and can be separated from the polluted filter elements to be washed, and the purpose of washing the filter elements can be achieved. The method is convenient to operate and has almost no pollution to the environment; the method is an economical and applicable method for washing the filter elements; moreover, the hydrolysis temperature is lower than the calcinations temperature of a calcinations furnace; the hydrolysis time can be used for adjusting the washing time according to the factors such as the size and the number of the washed filter elements, and the like.

The invention discloses a method for preparing ethanol from loofah stems, and belongs to the technical field of biomass energy. The ethanol is prepared by conducting such steps as drying, crushing, pre-processing, hydrolyzing and fermenting the loofah stems and the like. With the application of the method provided by the invention, the uncertainty of a microbial enzyme fermentation sugar making process can be avoided, so that technical risks are reduced; the method provided by the invention, as a green and environment-friendly process, is high in sugar conversion rate and low in the amount of generated residues; and the method provided by the invention is relatively low in hydrolysis temperature, low in energy consumption and is conducive to the popularization and application of related technologies.

The invention discloses carbon microsphere solid acid formed by one-step fructose hydrothermal synthesis and applied to a catalyzed hydrolysis process of cellulose, and belongs to the field of conversion and utilization of biomass resources and energy. A carbon microsphere solid acid catalyst disclosed by the invention has the molecular formula of CH0.0847O0.523S0.00840. The preparation conditions of the catalyst are mild; through one-pot reaction of fructose and sulfo salicylic acid under the hydrothermal condition of 150 DEG C, the preparation of solid microspheres and the loading of sulfo groups are realized simultaneously; the defects that a large amount of concentrated sulfuric acid is used and a large amount of sulfuric acid waste liquid is produced in a conventional process of preparing the solid acid by soaking the concentrated sulfuric acid by using activated carbon are overcome. The prepared carbon microsphere solid acid has high the catalytic activity on the hydrolysis of the cellulose. The solid acid catalyst has mild preparation conditions, no pollution, no corrosion and high activity, and can be used repeatedly for the hydrolysis of the cellulose. The carbon microsphere solid acid is prepared from the fructose and is applied to efficient hydrolysis of the cellulose; a new way is provided for the high value of the biomass resources.

The invention discloses a method for co-producing ethyl alcohol, acetone and butanol through boston ivies and belongs to the technical field of biomass energy. The ethyl alcohol, the acetone and the butanol are prepared through the steps of boston ivy drying, smashing, pretreatment, hydrolysis, fermentation and the like. The source of the raw material is wide, and the cost of co-producing of the ethyl alcohol, the acetone and the butanol is low. The sugar yield is 92.26%-92.97%, the butanol yield is 66.58%-67.61%, the butanol purity is 99.59%-99.69%, it states that the sugar conversion rate and the butanol yield are high, and by means of the method, the ethyl alcohol, the acetone and the butanol can be produced in a high yield mode. By means of the method, multiple new energy resources can be co-produced, and a new solution is provided for the energy shortage problem.

The invention discloses an environment-friendly separation process for valuable components in biomass materials. The environment-friendly separation process comprises the following steps of crushing the biomass materials; adding water for pulverizing-leaching treatment on the crushed biomass materials; activating the pulverized and leached materials in a stirring device; conveying the activated materials to a reaction kettle for pyrohydrolysis, wherein the temperature is controlled to 150-220 DEG C and the pressure is controlled to 0.5-3MPa during pyrohydrolysis; filtering a reaction product after pyrohydrolysis, wherein filter liquor mainly comprises hydrolysis components of hemicellulose in the biomass materials, filter residue can be subsequently treated, a lignin degradation component, cellulose and other components can be further separated through subsequent oxydative degradation. The method has the advantages of convenient operation, low equipment investment, low-price and easily obtained materials, environment friendliness, circular using of biomass resource and the like.

The invention discloses a method for preparing ginsenoside Rh1. Although the acid-hydrolysis method is applied to the preparation of total saponins and preparation thereof from ginsenoside, the complex procedure is needed for deacidification after acid-hydrolysis and no reports indicate that the special method for preparing high-purity Rh1 exists. The invention provides a method for preparing ginsenoside Rh1, which is characterized by comprising the steps of adding glacial acetic acid in protopanaxtriolsaponins for hydrolysis, obtaining Icariside part enriched with ginsenoside Rh1 by chromatography deacidification of macroporous resin column, carrying out purification by reversed-phase medium-pressure column chromatography, and finally obtaining the ginsenoside Rh1 with the purity of morethan 90%. The method adopts the macroporous resin column for chromatography deacidification, ensures high metastasis rate of the total saponins, has moderate hydrolysis condition and short reaction period, effectively saves cost and energy resource, is easy for industrial production, thus ensuring the high yield of Rh1 and improving purity.