276results about How to "Increase hydrolysis rate" patented technology

The invention provides a hydrolyzing and separation device of methyl acetate and a technique method thereof, which more particularly relates to a novel technique to catalyze and hydrolyze methyl acetate by a reaction bulkhead distillation tower, which can organically combine reaction process, product separation and recovery of no reactant into the tower. A separator extending from the upper part of the tower to the lower part of the tower is arranged on the vertical direction in the conventional distillation tower, the upper part of one side of which is covered and the other side of which is filled with a catalyst; therefore, the inner space of the reaction bulkhead distillation tower is divided into five regions with different functions. The hydrolyzing and separation device of methyl acetate can fully unleash the advantage of bulkhead tower and reaction distillation, and can cause hydrolysis reaction, product separation and recovery of non reactant to be realized in the same tower. The device provided by the invention and the technique process thereof can obtain the methyl acetate with 60 percent to 99.99 percent hydrolysis rate and products with high purity, restrain side effect effectively, reduce the volume of equipment markedly, simplify process, and reduce energy consumption and operation cost.

For the continuous hydrolysis of organochlorosilane, a reaction system comprising at least three stages of hydrolysis is used. Each stage includes a reactor and a phase separator wherein hydrolysis is effected to form a hydrolysis mixture which is separated into a hydrolyzate and a hydrogen chloride-containing aqueous medium. The separated aqueous medium is circulated to the reactor. The hydrolyzate is conveyed to the reactor of the subsequent stage. The organochlorosilane is fed into the first stage reactor, the aqueous medium containing an amount of water corresponding to the consumption in one stage is fed into one stage reactor from the subsequent stage, and an amount of water corresponding to the consumption in the overall reaction system is fed in the last stage. Then the entire amount of hydrogen chloride generated in multiple stages of hydrolysis is recovered as anhydrous hydrogen chloride from the first stage. The entire amount of the aqueous media separated in the phase separators is retained in the reaction system.

The invention relates to a method for producing a soybean peptide. In the method, fermented soybean meal is taken as a raw material and then animal-derived protease is utilized to produce the soybean peptide. The method comprises the following steps of: 1) enzymolyzing liquid, namely mixing the fermented soybean meal and water in a weight ratio of 1:(4-8), adding trypsinase, and preserving heat and enzymolyzing; 2) killing enzyme at high temperature; 3) filtering, namely filtering and separating enzymatic hydrolysate to obtain crude soybean protein; 4) decolorizing and deodorizing; 5) refining; and 6) spray-drying, and sterilizing to obtain a finished product, wherein the decolorization and deodorization are realized through filtration by a pretreated macroporous resin. The method has theadvantages that: 1) the fermented soybean meal is taken as the raw material, so that a protease inhibitor in the raw material is eliminated; 2) the prehydrolysis of soybean protein in the fermented soybean meal can be completed; and 3) the amount of the additional enzyme is reduced greatly, so that the cost is effectively reduced and the higher hydrolysis rate is obtained.

The invention provides biocompatible resorbable polymers, comprising monomer units having formula (I), formula (II), formula (III) or formula (IV). The polymers degrade over time when implanted in the body, and are useful as components of implantable medical devices.

The invention discloses a method for preprocessing lignocellulose, which comprises: installing the lignocellulose into a recycle reactor, injecting diluted acid, opening a circulating pump to carry out cyclic reaction under the temperature of 50DEG C-200DEG C, acid-removing and filtering hydrolyzate which is obtained after finishing the reaction, and using the hydrolyzate to ferment. The invention also discloses a system which is applied in the method. The method of the invention can effectively increase the conversion rate of hemicellulose and the conversion rate of cellulase hydrolysis in the lignocellulose, fermentation inhibiting products are reduced, simultaneously, the time for preprocessing also can be shortened, and the energy consumption is lowered.

This invention discloses a method for preparing high-purity xylooligosaccharide from straw by using enzyme and membrane technology. The method comprises: steam-exploding straw, adding xylanase, hydrolyzing, centrifuging or filtering to obtain supernatant, performing nanofiltration or vacuum-concentration, acid-treating, centrifuging or filtering to obtain supernatant, performing active carbon adsorption, ultrafine filtration and ion exchange resin column adsorption, and concentrating or spray-drying to obtain high-purity xylooligosaccharide slurry or powder (xylooligosaccharide content is up to 70-95%). The residues of straw produced during xylooligosaccharide preparation can be used for papermaking, thus is environmentally friendly. Straw has an abundant resource, thus the cost is low. The method has such advantages as high treatment quantity, integrated operation, simple process, and high efficiency.

The invention discloses a bagasse pretreatment method. The bagasse pretreatment method comprises the following steps of: drying, crushing and screening the bagasse, then pretreating the bagasse by using sodium hydroxide and hydrogen peroxide to obtain the pretreated bagasse. According to the pretreated bagasse material, the maximum removal rates of the hemicellulose and lignin respectively reach 78.18 percent and 94.56 percent, the maximum enzyme hydrolysis rate of the cellulose is 64.37 percent, and the enzymolysis efficiency is improved by 60.67 percent compared with that of untreated raw bagasse. Therefore, the pretreatment method breaks through wrapping of the hemicellulose and lignin to the cellulose, the hydrolysis rate of the cellulose is increased, the enzymolysis resistance property of the bagasse is improved, the obtained bagasse material can be used for converting high added value products, such as ethanol through microbial fermentation after being subjected to enzymolysis, and thus biomass resources, such as bagasse are effectively utilized.

The invention discloses a preprocessing method for a lignocellulose raw material, which comprises the following steps: (1) fully mixing the crashed lignocellulose raw material with water, and then standing for 2-4 hours, and transferring a mixture into a high-pressure reactor; heating the high-pressure reactor from room temperature to 180-240 DEG C under the protection of inert gases, and then immediately and quickly cooling the reactor to the room temperature through condensate water, wherein the strength factor is 2.40-4.17 and the pressure is a saturated vapor pressure at 1.19-3.45MPa at corresponding temperature; and (2) performing solid-liquid separation on the product obtained in the step (1), thereby obtaining a solid-phase product and a liquid-phase product. The preprocessing method for the lignocellulose raw material has the advantages of low cost, no pollution to environment, low energy consumption, high hydrolysis rate of hemicellulose, high recovery rate, and the like.

The invention discloses a preparation method of enzyme hydrolysis pearl powder, comprising the following steps of: superfine pulverizing and wet grinding the pearl until more than 90 percent of the particles have a diameter less than 0.5 micron, mixing the pearl powder with water into turbid liquid, heating the turbid liquid to 40 to 60 DEG C, adding neutral protease for enzyme hydrolysis and enzyme destruction, and drying by spraying to obtain the enzyme hydrolysis pearl powder. The technical method is simple, the proteolysis ratio of the pearl is high, and the special flavour and effective constituent of the pearl powder are maintained to the maximum. The pearl powder can be easily digested and absorbed by a human body, can be easily absorbed by the skin and is applicable to medicine, nutrition and skin-care product as an additive.

The invention relates to a low-lactose milk preparation method which comprises the following steps: (1) mechanical impurities of raw milk are removed by milk purification technique; (2) raw milk after purification is sterilized at ultra-temperature or pasteurized and then cooled to temperature below 8 DEG C; (3) milk compound is prepared; (4) the prepared milk compound is sterilized at ultra-temperature or pasteurized and cooled; (5) lactase preparation is added under aseptic condition; (6) the milk is bottled sterilely. The milk compound in step (3) also comprises: 0.1-10 wt parts of dietary fiber for increasing the health care function of the milk and further comprises essence less than 2 parts by wt. The method of the invention overcomes the shortcoming of low lactose hydrolysis rate of the prior technique. The product prepared by the method of the invention has good stability, and is particularly suitable for people with severe lactose intolerance symptom. The invention is also added with dietary fiber in the formula.

The invention belongs to the field of microbial fermentation and in particular relates to a method for preparing taste-active peptides and delicious amino acids by using aspergillus oryzae fermented peanut meal and application thereof. The method comprises the following steps: performing ultraviolet mutagenesis by utilizing aspergillus oryzae AS 3.95, and screening to obtain a mutant strain of which the protease activity is improved; and performing peanut meal fermentation by utilizing the strain so as to produce the peanut peptides and delicious amino acids with good flavors. The hydrolysis rate and delicate flavor value of the peanut proteins can be improved, the content of taste-active peptides and free amino acids is increased, and the method has high application value in flavoring base materials. The main component of the selected fermentation medium is peanut meal, the raw materials are easily available and low in price, and the cost is low. The hydrolysis rate and delicate flavor value of the peanut meal proteins can be obviously improved after fermentation, and the method has high application value. According to the preparation method disclosed by the invention, the fermentation cost can be reduced, the production link is simplified, and the efficiency is improved.

The invention discloses a method for preparing protein hydrolyzate from abalone viscera through complex enzyme hydrolysis, bitterness shielding and other technologies. Complex enzymes comprise alkali protease and papain. The protein hydrolyzate is prepared from abalone viscera by cleaning, pulping, hydrolyzing with the enzymes, inactivating the enzymes and shielding bitterness by using ethyl maltol in sequence. The method effectively utilizes a side product, namely viscera, generated during abalone processing, and the bitterness of the protein hydrolyzate is avoided; the prepared protein hydrolyzate has high content of free amino acid, high absorptivity of human body, rich nutrition and delicious flavor, and can be used as an additive to be widely applied to products such as cans, sauces,fodders, plant nutrient solutions and the like.

The invention discloses soluble dietary fibers rich in galactomannan and a preparation method of the soluble dietary fibers. The mass percentage of galactomannan is 20-30%. Beta-mannase provided by the invention is better in stability and higher in activity than enzyme, and has great application value in the trade of foods, feeds and the like. According to the preparation method provided by the invention, the hydrolysis rate and the galactomannan conversion rate are high, products are easy to separate, and the weight-average molecular weight of finished products is about 24800Da; and two kinds of products of soluble dietary fiber syrup and powdered sugar, containing the galactomannan, can be produced by the preparation method provided by the invention, besides, the yield of products is high, the yield of the soluble dietary fiber syrup is 74.2%, and the yield of the powdered sugar is 72.8%.

The invention discloses a method for hydrolyzing biomasses in two steps by utilizing a carbon-based solid acid catalyst. The method comprises the following steps: (1) putting the carbon-based solid acid catalyst and biomass materials into a reactor at the mass ratio of (2 to 5) : 1; adding water into the reactor at the mass ratio of the biomass materials of the water of 1 to (10 to 40); after heating a mixture to 120 DEG C to 150 DEG C, reacting for 2 to 3 hours; separating hydrolysate, discharging the hydrolysate into a storage tank for storing pentose, and storing; (2) adding water into the reactor at the mass ratio of the biomass materials of the water of 1 : (10 to 40); after heating the mixture to 140 DEG C to 180 DEG C, reacting for 2 to 4 hours; separating hydrolysate, discharging the hydrolysate into a storage tank for storing hexose, and storing; (3) emptying the materials in the reactor and preparing for the next reaction cycle. According to the method disclosed by the invention, hemicellulose and cellulose in the biomass materials can be effectively catalyzed and be subjected to a hydrolysis reaction, and the method has the characteristics of high hydrolysis rate and high sugar yield.

A process for hydrolyzing sucrose to glucose and fructose using succinic acid is described. The hydrolysate can be used to produce purified glucose and/or fructose or can be used as a carbon source for fermentations to produce various chemicals including succinic acid.

The invention belongs to the technical field of food deep processing, and particularly relates to a method for preparing flavor Maillard peptides through extruding pretreatment of raw vegetable protein materials. In the method, soybean meal, peanut meal and wheat gluten proteins which are matched scientifically to serve as raw materials are extruded and expanded and then subjected to enzymolysis,solid-liquid separation, reverse osmosis concentration and single-effect evaporation concentration, a concentrated solution and reducing sugar are subjected to a Maillard reaction, a reaction productis subjected to vacuum concentration or spray drying, and the finished product is obtained. The flavor Maillard peptides prepared according to the method are rich, mellow, fine, fresh, sweet and longin flavor, rich in nutrition, healthy and safe, and when the flavor Maillard peptides are used in foods, the flavor of the foods can be obviously improved without masking the intrinsic flavor of the foods.

The invention discloses a preparation method of high-activity crystal seed by hydrolysis of a titanium sulfate solution and belongs to the technical field of production of titanium dioxide by a sulfuric acid method. The preparation method comprises the following steps of (A) taking and putting a hydrolytic titanium sulfate solution into a preheating groove to be preheated to 50-65 DEG C, wherein the concentration of TiO2 in the hydrolytic titanium sulfate solution is 195-205g/L, the concentration of Ti<3+> is 1.0-3.0g/L (calculated by TiO2), the concentration ratio F between effective acid andtotal TiO2 is 1.70-1.85, the concentration ratio between Fe and TiO2 is 0.26-0.31, the solid content is less than 30mg/L, and the stability is greater than or equal to 500; (B) preheating alkaline liquid to 50-65 DEG C, and controlling the concentration of the preheated alkaline liquid to 8.0-8.5%; (C) within 1-4 minutes, adding the hydrolytic titanium sulfate solution into the alkaline liquid, and after the reaction is finished, controlling the temperature of the crystal seed titanium sulfate solution to be 40-60 DEG C; (D) diluting and controlling the concentration of TiO2 in the crystal seed titanium sulfate solution to be 30-160g/L. The crystal seed prepared by the method is high in activity, less in added amount in water crystallization and high in hydrolysis rate, and the obtained hydrated titanium dioxide is uniform in particle size distribution.

The invention relates to an alkali protease, which can hydrolyze protein under alkali condition and has specified physicochemical characteristics and high hydrolysis percent.