39 results about "Molecular rearrangement" patented technology

The invention discloses a preparation method of grease with a humanized structure. The preparation method comprises the following steps: carrying out intra-molecular rearrangement reaction to palm oil with palmitic acid content of higher than 50% under the action of catalyst to obtain Sn-2 locus triglyceride with palmitic acid content of higher than 50%; and carrying out ester exchange reaction to the Sn-2 locus triglyceride with palmitic acid content of higher than 50% with mixed fatty acid or non-glyceride under the action of 1,3 locus Specificity lipase, and then subjecting the reaction product to after treatment, so as to obtain the grease with humanized structure, wherein the mixed fatty acid is mixture of at least two selected from the group consisting of decanoic acid, lauric acid,myristic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid and linolenic acid. The vegetable oils are used as the raw material according to the method, so the safety is high; the preparation process is simple, the reaction time is short, the enzyme dosage is low, and the cost is low; and the prepared grease with the humanized structure is very similar to the beast milk fat in the composition of fatty acid and the structural distribution of triglyceride, so the grease can be added in infant formula or formula foods and used as breast milk fat substitute.

The invention relates to a polycarboxylate superplasticizer for reducing the viscosity of high-grade concrete and a preparation method thereof. The polycarboxylate superplasticizer is prepared by: adding an initiator into the monomer alkenyl terminated polyoxyethylene ether shown as formula (1), unsaturated acid and unsaturated ester, carrying out random copolymerization reaction through an aqueous solution at room temperature, then adding a viscosity reduction regulator to conduct molecular rearrangement, and employing an alkaline regulator to adjust the product to neutral. The invention also includes a preparation method of the polycarboxylate superplasticizer for reducing the viscosity of high-grade concrete. The polycarboxylate superplasticizer provided by the invention has high water-reducing rate, can achieve good viscosity reducing effect when applied in high-grade concrete, and has the advantages of good adaptability, low gas content, good retainability and good pumpability.

The invention relates to a method for preparing biodiesel from illegal cooking oil, acid oil and waste animal and plant grease. The method comprises the following steps: with the illegal cooking oil, the acid oil and the waste animal and plant grease as main raw materials, degumming and removing impurities, vaporizing to separate out heavy oil, and through catalytic cracking chemical decomposition reaction, processing macromolecular grease through catalytic cracking, molecular rearrangement, removal of carboxyl groups and an oxygen element and other reaction mechanisms so as to convert the animal and plant grease into the biodiesel which meets national standard requirements for gasoline and diesel in hydrocarbon molecular structural composition, condensation point, density, viscosity, cetane number and octane number and other technical indexes. The method is wide in application range; by the method, strong technical supports are provided for enterprises to simplify the production line, lower the production cost and the management cost and the technical level of the biodiesel is greatly improved; the quality of the prepared biodiesel is obviously higher than that of the existing biodiesel; therefore, the method has quite remarkable social and economic benefits.

The invention provides a method for inhibiting retrogradation of instant rice. Trehalose is a safe and reliable natural anti-retrogradation agent, which is lower in sweetness than sucrose and free of toxic effects to the human body. For the trehalose is small in molecular weight and relatively high in dissolubility, the trehalose is capable of relatively well infiltrating into pores of the rice grains when a trehalose solution is used for wetting the rice. At the same time, a certain pressure is exerted on the rice by ultrahigh pressure equipment, so that the trehalose is promoted to infiltrate into the pores of the rice grains by the ultrahigh pressure. The trehalose molecules and amylose molecules combine fully so as to form conjugant, so that steric hindrance is increased and starch molecular rearrangement is influenced; thus, re-crystallization degree of the starch is delayed, and retrogradation phenomenon of the rice is thereby inhibited. The rice treated by controlling trehalose solution concentration, wetting temperature, high-pressure treatment pressure and time is then cooked, so that ultrahigh pressure-synergic trehalose infiltrated instant rice with good edible qualities and obvious retrogradation-resistant effects is prepared. Being stored at 4 DEG C for 30 days, etrogradation enthalpy of the prepared instant rice is 3.42J / kg, which is 1.19J / kg lower than the etrogradation enthalpy of common instant rice; and bound water content of the prepared instant rice is 12.7%, which is 2.3% higher than the bound water content of common rice.

The invention belongs to a rusting passivator. The passivator is prepared from, by weight, 5-10 parts of acrylic emulsion, 10-20 parts of transformation accelerant tannin, 70-80 parts of penetrant isopropanol, 150-200 parts of assistant absolute ethyl alcohol, 150-210 parts of film-forming agent phosphoric acid, 20-30 parts of transformation accelerant lactic acid, 25-30 parts of butyl cellosolve and 350-425 parts of water. By means of a macromolecular composite organic acid group in the rusting passivator, rust is reduced into passivation components with the rust protection capacity, molecular rearrangement of polymeric micelle happens on a metal matrix, and film forming is achieved through crossing. A film layer has high closing performance, high rust removal performance and high adhesive force, and therefore the problem of secondary rusting of coating generated after rust removal is solved thoroughly.

The invention provides a pulverized coal activator, which comprises the following components in percentage by weight: 1 to 14 percent of resin clay, 5 to 26 percent of glucose, 0.5 to 5 percent of cobalt molybdate, 0.5 to 29 percent of cholesterol ester benzoate, 1 to 29 percent of boron anhydrous, 1 to 15 percent of clay, 1 to 15 percent of titanium dioxide, 1 to 17 percent of sodium stearate, 1 to 5 percent of ferric chloride, 1 to 10 percent of argil, 1 to 26 percent of anhydrous borax, 1 to 16 percent of modified starch , and 1 to 25 percent of tar residue. The pulverized coal activator added can be directly mixed with matched coal so as to ensure that active components and inert components of the matched coal can be easier to combine together during carbonization and raise the anisotropic tissue content of coke. The increase in coal fluidity is beneficial to intermediate phase for forming staged molecular rearrangement, promotes the transformation process of the intermediate phase, and forms higher-strength coke capable of replacing or partially replacing coking coal for coking. The pulverized coal activator has the advantages of small adding dose, high benefit and low comprehensive cost.

The invention discloses a preparation method of a homopiperazine derivative. The preparation method comprises the following steps of: (1) reacting 4-piperidone hydrochloride hydrate with an amino protective agent to prepare amino-protected 4-piperidone; (2) performing oximation reaction on the amino-protected 4-piperidone to prepare amino-protected 4-oxime piperidone; (3) performing molecular rearrangement on the amino-protected 4-oxime piperidone to prepare amino-protected 5-carbonyl homopiperazine; and (4) performing reduction reaction on the amino-protected 5-carbonyl homopiperazine to prepare amino-protected homopiperazine. The 4-piperidone hydrochloride hydrate is taken as a raw material, and is subjected to amino protection, oximation, rearrangement, reduction and deprotection to prepare the homopiperazine, and the amino-protected homopiperazine is reduced by sodium borohydride in the presence of an adjuvant to prepare the homopiperazine, so that lithium aluminum hydride which has high safety risk and cost in a preparation process of the conventional method is avoided. The whole process is easy to control, reaction conditions of each step are mild, the method is suitable forindustrial production, the yield is 75 percent, the raw material with low cost is used, and production cost is effectively reduced.

The present invention discloses a microwave-combined electric field-assisted method for production of quickly-frozen convenient rice, comprising the steps of: (1) cleaning rice; (2) soaking the rice; (3) steaming and cooking with microwave; (4) cooling to room temperature and packing; ( 5) pre-cooling to 1-2 DEG C; (6) performing electric field-assisted freezing on the pre-cooled rice to complete crystallization, wherein the electric field-assisted freezing temperature is-18 to-20 DEG C; (7) freezing to freezing storage temperature in the absence of electric field; and (8) performing freezing storage. The microwave-combined electric field-assisted method can effectively inhibit linear chain molecule gelling, formed ice crystals are fine, and mainly distributed in the crystal cell, amylopectin molecular rearrangement is greatly prevented, and the convenient rice with good taste and good nutrition can be obtained.

The invention relates to an EPSP synthase AroA-Ra multisite mutant of a rahnella aquatilis, particularly to the multisite mutant improved from the gene coded as 5- enol acetone shikimic acid-3-EPSP synthase of the rahnella aquatilis through DNA molecular rearrangement method and function complementation method, and the resistance of the improved multisite mutant to the glyphosate is greatly improved. The nucleotide sequence of the multisite mutant is as indicated by SEQ ID No1, the encoded amino acid sequence is as indicated by the SEQ ID No2, and the mutant has 6 different mutational sites under the same molecule. The multisite mutant not only retains the high affinity of the original EPSP synthase toward the PEP, but also reduces the affinity of the EPSP synthase toward the glyphosate herbicide, so that the glyphosate resistance of the mutant is greatly improved.

A method and an apparatus based on a reactor vessel (201) that is brought to a predetermined vacuum degree, in particular said vacuum degree set between 2 and 6 absolute millibar, an to a high temperature. A waste material is continuously introduced in the vessel (202), in particular a solid waste material (5) is introduced in such a way that a vacuum loss from the vessel (201) is prevented. Owing to the high temperature, waste material (5) forms a plasma that undergoes a molecular rearrangement, which gives origin to a substantially liquid residue that is collected in a bottom portion (204) of reactor (201), and to a gas (11). The gas (11), which mainly comprises carbon monoxide, hydrogen, carbon dioxide and steam, i.e. a typical syngas composition, is continuously taken away from the vessel (201) through a duct (12), and is sent to subsequent treatments to obtain a gas fuel that can be burnt by devices such as a gas turbine, a motor or a boiler. The high temperature in reactor (201) is maintained due to a current in the form of electric discharges (20) that is established between two electrodes (21,22) below the liquid head (7). The substantially liquid residue is periodically discharged to maintain a liquid head height (7) not exceeding a reference height value H*, in such a way that air inlet into vacuum loss from the vessel (201) is prevented.

Provided are a method and an apparatus based on a reactor vessel (201) that is brought to a predetermined vacuum degree, in particular said vacuum degree set between 2 and 6 absolute millibar, an to a high temperature. A waste material is continuously introduced in the vessel (202), in particular a solid waste material (5) is introduced in such a way that a vacuum loss from the vessel (201) is prevented. Owing to the high temperature, waste material (5) forms a plasma that undergoes a molecular rearrangement, which gives origin to a substantially liquid residue that is collected in a bottom portion (204) of reactor (201), and to a gas (11). The gas (11), which mainly comprises carbon monoxide, hydrogen, carbon dioxide and steam, i.e. a typical syngas composition, is continuously taken away from the vessel (201) through a duct (12), and is sent to subsequent treatments to obtain a gas fuel that can be burnt by devices such as a gas turbine, a motor or a boiler. The high temperature in reactor (201) is maintained due to a current in the form of electric discharges (20) that is established between two electrodes (21,22) below the liquid head (7). The substantially liquid residue is periodically discharged to maintain a liquid head height (7) not exceeding a reference height value H*, in such a way that air inlet into vacuum loss from the vessel (201) is prevented.

The invention discloses metal anticorrosive coating for repairing rusted steel. The coating includes, by mass, 20-24 parts of acrylic acid, 8-12 parts of tannic acid, 4-8 parts of isopropyl alcohol and 1-2 parts of an activating agent. The acrylic acid, the tannic acid and the isopropyl alcohol are adopted as main ingredients of the coating, rust is reduced into a rust-proof deactivated componentthrough composite organic acid groups of polymer, polymer micelles undergo molecular rearrangement on a metal matrix, a film is formed through oxidation, and the film has high sealing performance, high rust removal performance and high adhesive force, thus completely solving the problem of secondary rusting after rust removal and coating.

The invention relates to a flame-retardant diphenylmethane diisocyanate derivative and a synthesis method of the derivative, and belongs to the technical field of polyurethane materials. The general chemical structural formula of the flame-retardant diphenylmethane diisocyanate derivative is n (X) NCO-Ar-CH2-Ar-NCO(X)n, wherein the Ar is a benzene ring, n is 1-4, and X is Br or Cl; the synthesis method of a derivative of flame-retardant diphenylmethane diisocyanate comprises the following steps: carrying out condensation reaction on bromine-containing aniline monomer micromolecules and formaldehyde, sequentially carrying out hydrochloric acid salification, molecular rearrangement and caustic alkali neutralization reaction to obtain a flame-retardant diphenylamine intermediate, and carryingout phosgenation reaction on the flame-retardant diphenylamine intermediate to obtain the flame-retardant diphenylmethane diisocyanate derivative. The flame retardant effect is good, the addition amount of a physical flame retardant in the polyether polyol component can be reduced, and the purpose of reducing VOC and odor while achieving high flame retardance is achieved.

The present invention relates to a full nutrient edible oil series. According to their respective composition, fatty acid content and fatty acid content necessary for human body said series is made up by adopting three or more than three kinds of edible oil. It is characterized by that it is a new type full-nutrient edible oil reconstituted on molecular level by adopting molecular recombination techinque, and the composition proportion of S, M, P, omega 6 and omega 3 being in edible oil is reasonable, and its nutrients are easily absorbed by human body, and beneficial for health for human body.

The present invention provides a method of preparing polymethylene-polyphenyl-polyamine (briefly referred to as polyamine, DAM), in which a high gravity rotating bed is used as the mixing reactor of formaldehyde and aniline hydrochloride, the mixing solution of aniline hydrochloride and circulation solution and the formaldehyde are fed into the high gravity rotating bed reactor proportionally to carry out mixing and condensation reaction under a condition of a very high gravity; the materials leaving the high gravity rotating bed reactor is introduced into a stirred vessel to proceed with the pre-condensation reaction and obtain a condensation solution; and the process steps of heating, molecular rearrangement, neutralization, water washing and purification, etc. are completed to obtain the refined DAM. With the method according to the present invention, the main by-products is obviously reduced in the condensation process, the phenomenon of deposit attaching to the inner walls of circulation pipes and heat exchanger and blockage are prevented in the condensation process, the impurity content is low in the refined DAM, and the subsequent product MDI has a lighter color, the product quality is stable and may be improved to a certain extent.

The invention discloses a preparation method of grease with a humanized structure. The preparation method comprises the following steps: carrying out intra-molecular rearrangement reaction to palm oil with palmitic acid content of higher than 50% under the action of catalyst to obtain Sn-2 locus triglyceride with palmitic acid content of higher than 50%; and carrying out ester exchange reaction to the Sn-2 locus triglyceride with palmitic acid content of higher than 50% with mixed fatty acid or non-glyceride under the action of 1,3 locus Specificity lipase, and then subjecting the reaction product to after treatment, so as to obtain the grease with humanized structure, wherein the mixed fatty acid is mixture of at least two selected from the group consisting of decanoic acid, lauric acid, myristic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid and linolenic acid. The vegetable oils are used as the raw material according to the method, so the safety is high; the preparation process is simple, the reaction time is short, the enzyme dosage is low, and the cost is low; and the prepared grease with the humanized structure is very similar to the beast milk fat in the composition of fatty acid and the structural distribution of triglyceride, so the grease can be added in infant formula or formula foods and used as breast milk fat substitute.

The invention relates to a sulfamate water reducing agent preparation method, which comprises: mixing phenol, alkylphenol polyoxyethylene ether, sodium para-aminobenzenesulfonate and deionized water to obtain a mixing liquid; heating the mixing liquid, adjusting the pH value of the mixing liquid to a first preset pH value, adding formaldehyde, and carrying out a hydroxymethylation reaction to obtain a first reaction liquid; carrying out a constant temperature condensation reaction on the first reaction liquid under a preset condensation temperature condition to obtain a second reaction liquid;and at a preset rearrangement temperature, adding urea to the second reaction liquid, adjusting the pH value to a second preset pH value, and carrying out a molecular rearrangement reaction to obtainthe sulfamate water reducing agent. According to the present invention, the obtained sulfamate water reducing agent has different side chains with different lengths, wherein the side chains comprisealkyl, hydroxymethyl, sodium para-aminobenzenesulfonate, phenol, urea and other groups, even the polymerization products of the groups, such that the segregation bleeding problem can be reduced, and the water reducing ability can be improved.

The invention discloses a high-strength transparent hydrophobic cellulose nano film and a preparation method thereof, belonging to the field of green cellulose materials and environment-friendly nano materials. The method of the invention uses natural cellulose as a raw material, firstly hydrolyzes the cellulose raw material with formic acid, and the separated cellulose solid is sequentially subjected to solvent replacement, mechanical treatment and drying to obtain the high-strength transparent hydrophobic cellulose nano film. The nanocellulose film prepared by the method of the present invention has excellent properties, compact structure, high strength and high transparency, the tensile strength of the film can be greater than 200MPa, and the transparency can reach 95%; the hydrophobic modification process of the present invention does not require complex chemical reactions and expensive Chemical reagents, molecular rearrangement and recrystallization can occur on the surface of cellulose during mechanical treatment and film formation; the water contact angle of the obtained nanocellulose film can reach 99°, and the original shape can still be maintained after long-term immersion in water. It has good water resistance and can be used in high humidity environment.

The invention belongs to a new chemical process, relates to a novel synthetic method of a traditional material, and particularly relates to a novel preparation method of a special multi-functional polyester resin; the novel preparation method is characterized in that a reversible esterification reaction is applied, polyester or modified polyester undergoes a reaction together with polyether polyols with different molecular weights, molecular rearrangement is carried out, rearrangement condensation polymerization is carried out under the action of vacuum to prepare the multi-functional resin directly, and a self-made intermediate can be added according to requirements of modification. Compared with a traditional process, the novel preparation method is simple in process, lowers costs, and has good effects.

The invention discloses a preparation method of hexaetcycletrisiloxane or triethyl trimethylcyclotrisiloxane, comprising the following steps: tetraethyl orthosilicate or methyl triethoxysilane and Grignard reagents which are formed by metallic magnesium and alkyl halide carry out Grignard reaction in solvents, hydrolytie polycondensation is carried out to the reaction mixture in diluted acid solution, the solvents are evaporated out by separation and washing and are heated commonly with concentrated sulfuric acid to carry out molecular rearrangement, and then comonomer of diethyl siloxane or the comonomer of methyl ethylsiloxane is obtained by renew neutralization and drying; the comonomer is cracked and rectified under the catalysis of potassium carbonate catalyzers, thereby obtaining the hexaetcycletrisiloxane or the triethyl trimethylcyclotrisiloxane. The method avoids environment pollution caused by chlorine monomers and prevents from using the solvents such as diethyl and the like in a large scale, thereby reducing the technique difficulty and investment scale and realizing industrial production of products easily; in addition, the process is not only simplified, but also thesafety of process operation is improved.

The invention relates to the technical field of heavy oil processing, in particular to a method and system for pre-atomizing catalytic feed oil, and the method comprises the following steps: (1) introducing atomized gas into a middle cavity of a micro-interface treatment tank, and dispersing the atomized gas in a micro-interface guide pipe to obtain microbubbles; (2) catalytic feed oil is introduced into a bottom cavity of a micro-interface treatment tank and enters a micro-interface guide pipe to be mixed with the micro-bubbles to obtain gas-liquid emulsified phase oil, and (3) the gas-liquid emulsified phase oil enters a top cavity of the micro-interface treatment tank and is led out of the micro-interface treatment tank to obtain gas-liquid emulsified phase oil. Introducing the mixture into a molecular rearrangement device for molecular rearrangement to obtain rearrangement gas-liquid emulsified phase oil. The method provided by the invention can reduce the viscosity, density and surface tension of the catalytic feed oil, facilitates full contact vaporization of the catalytic feed oil and a high-temperature catalyst, and improves the efficiency of a catalytic cracking reaction.

The invention discloses a method for synthesizing 2-(benzoyl) benzoyl chloride. The method comprises the following steps: firstly, carrying out acylation reaction on o-benzoylbenzoic acid and thionylchloride under the action of a catalyst to prepare 3-chloro-3-phenylbenzofuranone; secondly, taking trichloroacetaldehyde as a solvent and carrying out ring-opening and molecular rearrangement reaction on the 3-chloro-3-phenylbenzofuranone and concentrated hydrochloric acid under the action of the catalyst to prepare a target product 2-(benzoyl) benzoyl chloride. The method disclosed by the invention has the advantages of mild reaction conditions, simple and safe operation, simple post treatment, few three wastes, high yield of a product (total yield is 95 percent or above) and suitability forindustrial production; the purity of the 2-(benzoyl) benzoyl chloride is 99.5 percent or above.

The invention discloses a preparation method of a homopiperazine derivative. The preparation method comprises the following steps of: (1) reacting 4-piperidone hydrochloride hydrate with an amino protective agent to prepare amino-protected 4-piperidone; (2) performing oximation reaction on the amino-protected 4-piperidone to prepare amino-protected 4-oxime piperidone; (3) performing molecular rearrangement on the amino-protected 4-oxime piperidone to prepare amino-protected 5-carbonyl homopiperazine; and (4) performing reduction reaction on the amino-protected 5-carbonyl homopiperazine to prepare amino-protected homopiperazine. The 4-piperidone hydrochloride hydrate is taken as a raw material, and is subjected to amino protection, oximation, rearrangement, reduction and deprotection to prepare the homopiperazine, and the amino-protected homopiperazine is reduced by sodium borohydride in the presence of an adjuvant to prepare the homopiperazine, so that lithium aluminum hydride which has high safety risk and cost in a preparation process of the conventional method is avoided. The whole process is easy to control, reaction conditions of each step are mild, the method is suitable forindustrial production, the yield is 75 percent, the raw material with low cost is used, and production cost is effectively reduced.

The invention relates to an EPSP synthase AroA-Ra multisite mutant of a rahnella aquatilis, particularly to the multisite mutant improved from the gene coded as 5- enol acetone shikimic acid-3-EPSP synthase of the rahnella aquatilis through DNA molecular rearrangement method and function complementation method, and the resistance of the improved multisite mutant to the glyphosate is greatly improved. The nucleotide sequence of the multisite mutant is as indicated by SEQ ID No1, the encoded amino acid sequence is as indicated by the SEQ ID No2, and the mutant has 6 different mutational sites under the same molecule. The multisite mutant not only retains the high affinity of the original EPSP synthase toward the PEP, but also reduces the affinity of the EPSP synthase toward the glyphosate herbicide, so that the glyphosate resistance of the mutant is greatly improved.

The invention belongs to a rusting passivator. The passivator is prepared from, by weight, 5-10 parts of acrylic emulsion, 10-20 parts of transformation accelerant tannin, 70-80 parts of penetrant isopropanol, 150-200 parts of assistant absolute ethyl alcohol, 150-210 parts of film-forming agent phosphoric acid, 20-30 parts of transformation accelerant lactic acid, 25-30 parts of butyl cellosolve and 350-425 parts of water. By means of a macromolecular composite organic acid group in the rusting passivator, rust is reduced into passivation components with the rust protection capacity, molecular rearrangement of polymeric micelle happens on a metal matrix, and film forming is achieved through crossing. A film layer has high closing performance, high rust removal performance and high adhesive force, and therefore the problem of secondary rusting of coating generated after rust removal is solved thoroughly.

The invention provides a method for preparing acetyl propionyl, which comprises the following steps: 3- methyl butanol is subjected to molecular rearrangement reaction and oxidation reaction at a reaction temperature of between 200 and 600 DEG C and in the presence of oxygen-containing gas, and acetyl propionyl products are obtained. The method for preparing the acetyl propionyl can reduce environmental pollution, reduce the production cost and realize industrialization.

The invention discloses a method for synthesizing ceramic precursor polycarbosilane. The method is characterized by comprising the following steps of: cracking cyclosilane serving as a raw material at the temperature of between 350 and 500 DEG C under the protection of an inert gas or nitrogen; and then performing molecular rearrangement to form the polycarbosilane (PCS). In the method, the structure of the whole reaction temperature product is easy to control; the alkali metal content of the product PCS is low; and the test is performed under normal pressure, without high-pressure equipment or adding a catalyst, so the equipment is simple and practicable.