443 results about "Haloalkane" patented technology

A method for lateral chain modification of aryl main chain polymers with aromatic ketones or aldehydes containing tertiary basic N-groups is described. The modification can be accomplished via addition of an aromatic carboxylic acid or an acid derivative containing a tertiary amine moiety to a metallized polymer. The tertiary amines on the modified polymer can be converted to quaternary amines with halogen alkanes. Modification of the aryl main chain polymers with aromatic groups containing sulphonic acid radicals is also described. The polymers formed can be crosslinked and prepared for use in a wide variety of membrane technologies including ion exchange, dialysis, reverse osmosis, nanofiltration.

The present invention relates to a method for preparing an organic compound, in particular to a method for preparing an organic phosphate nucleator, which includes the following steps: phosphorylation reaction, hydrolyzation and salification. Since the solvent for the phosphorylation reaction adopts halogenated hydrocarbon instead of benzene series compounds, which is cheap, the cost can be reduced, and since the yield of the organic phosphate synthesized with the halogenated hydrocarbon used as the solvent is higher, the yield of the final product, the organic phosphate, is greatly increased. Moreover, since the solvent does not adopt the benzene series compounds, toxicity is low, non-burning operation is safe, environment can be protected, recycling is convenient, and the diaryl-substituted organophosphate metal salt used as nucleator prepared by the method has obvious effect in the improvement of the processing property of resin.

The mechanism of the UV light-induced reaction between the indole moiety of tryptophan and chloroform, and the structure of the modified tryptophan and polypeptides including such modified tryptophan residues. The excited indole moiety, which is formed upon UV light irradiation, emits a solvated electron which initiates a series of events that yield fluorescent derivatives that have CHO group covalently bound to the indole moiety. These derivatives are herein referred to as formyltryptophan, and are relatively stable. Similar reactions are observed when 5-hydroxytryptophan, 5-fluorotryptophan, or N-methylindolacetate are used in place of tryptophan, or when other haloalkanes, such as trichloracetic acid, trichlorethanol, trichlorethane, bromoform, and iodoactetate are used in place of chloroform. The derivatives can be used in a variety of applications in fluorescence spectroscopy, and for nuclear magnetic resonance, X-ray crystallography, infra-red spectroscopy, circular dicroism and mass spectroscopy. Additionally, the UV light-induced reaction between the indole moiety of tryptophan and haloalkanes can be used to prepare derivatives of tryptophan for chemical cross-linking studies of proteins and peptides.

The invention discloses polyhydroxy lignin/silicon dioxide composite nano particles and a preparation method thereof. The preparation method comprises the following steps: adding industrial lignin into water, adjusting the pH value to be 8-12, adding polyhydric alcohol and a catalyst, and dropping epoxy haloalkane, thereby obtaining polyhydroxy lignin; adding water into sodium silicate to prepare a solution with the mass concentration of 1-10%, adding the prepared polyhydroxy lignin, adjusting the pH value to be 8-11 by using a weak acid adjusting agent, reacting, adjusting the pH value to be 3-5 by using a strong acid adjusting agent, reacting, aging, centrifuging, depositing, and drying, thereby obtaining a powder product, namely the polyhydroxy lignin/silicon dioxide composite nano particles. The prepared composite nano particles are low in cost, uniform in particle size, good in dispersity and greatly superior to inorganic nano particles and acid-out alkali lignin in compatibility with high molecular materials, and the mechanical property of high molecular materials such as plastic can be remarkably improved.

The invention discloses a hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide. The hydrophobically-modified polyethyleneimine foaming agent is prepared by reacting polyethyleneimine subjected to hydrophobic modification by a glycidyl ether compound or an alkyl carboxylic compound or a halogenated alkane compound with 0-31% of distilled water at the pressure of 0.1-1 MPa in carbon dioxide at the room temperature for 1-3 days; a 5-40.4 mol% hydrophobic chain is grafted on N atoms in a polyethyleneimine molecular chain of the foaming agent, and a carbamic acid anion (-NCOO-) characteristic absorption peak or a bicarbonate (HCO3-) characteristic absorption peak exists at the range of 159-165 ppm of a C Nuclear magnetic resonance of the foaming agent, and the foaming agent can release carbon dioxide CO2 at the temperature of 50-150 to prepare a polyurethane foam material. The foaming agent provided by the invention can be uniformly dispersed in a preparation raw material of hydrophobic polyurethane foam, can solve a series of problems caused by the fact that non-modified polyethyleneimine is used as a foaming agent, and is climate-friendly.

The present invention is one kind of alkaline ionic liquid and its preparation process and application in Pd catalyzed C-C and C-N coupling reaction, and belongs to the field of new material and fine chemical technology. The alkaline ionic liquid consists of two parts, cation A+ and anion B-. The cation A+ precursor is imidazole, pyridine, etc; and the anion B- is alkaline group X- or non-alkaline group Y-. The alkaline ionic liquid is prepared through the first quaternizing with alkyl halide as the quaternizing reagent to obtain ion type halide; and the subsequent ion exchange to obtain the target alkaline ionic liquid. The alkaline ionic liquid of the present invention may act as acid-binding agent and can avoid formation of sticky inorganic salt to facilitate reuse.

The invention relates to an olefin polymerization catalyst as well as a preparation method and application of the olefin polymerization catalyst. The olefin polymerization catalyst comprises a primary catalyst and a promoter catalyst, wherein the primary catalyst comprises magnesium halide, transition metal halide, organic alcoholate, phosphate ester compound, epoxy haloalkane compound, organo-siloxane compound and organic alcohol ether compound; and the promoter catalyst comprises one or several kinds of the combination of organoaluminum compound. The preparation method of the olefin polymerization catalyst comprises the steps as follows: dispersing the magnesium halide into an organic solvent; sequentially adding the organic alcoholate, the phosphate ester compound and the epoxy haloalkane compound; heating and agitating to dissolve; then sequentially adding the organo-siloxane compound and the organic alcohol ether compound; and dropping the transition metal halide to obtain the primary catalyst, wherein the primary catalyst and the promoter catalyst are individually stored, and combined when in use. According to the olefin polymerization catalyst provided by the invention, the primary spherical catalyst and the promoter spherical catalyst are combined when in use, thus, high catalytic activity is achieved.

The invention discloses a preparation method of an organosilicon foam stabilizer applied to a single-component polyurethane foam sealing agent. The preparation method comprises the steps of (1) adding allyl alcohol, ethylene oxide and propylene oxide to a reaction kettle, and reacting under the action of a base catalyst at the temperature of 90-130 DEG C and pressure not more than 0.5MPa for 4-6h to obtain allyl-terminated copolymer ether; (2) reacting the polyether prepared in the step 1 with sodium at 85-120 DEG C, introducing excess haloalkane, and reacting for 4-6h to obtain methyl-terminated copolymer ether; (3) reacting octamethyl cyclotetrasiloxane, hexamethyl disiloxane and high-hydrogen-content silicone oil with hydrogen content of 1-2% in the presence of an acid ion exchanger to obtain low-hydrogen-content silicone oil with hydrogen content of 0.05-1.0%; (4) mixing the products obtained in the steps 1,2, and 3, adding a catalyst, and reacting under the condition of pressure being 0.5-2atm for 3-8h to obtain the organosilicon foam stabilizer. During foaming, the foam stabilizer has excellent dimensional stability and high foaming ratio and fluidity.

The invention discloses aryl alkyl thioether compounds and a synthesis method thereof. The synthesis method comprises the steps: in a reaction solvent, with an arylamine derivative and halogenated hydrocarbon as reaction raw materials, and Na2S2O3 as a vulcanization reagent, in the presence of a copper reagent catalyst, and reacting to obtain the aryl alkyl thioether compounds. According to the synthesis method disclosed by the invention, raw materials are easy to obtain and low in price, the reaction operation is simple, the reaction conditions are mild, the yield is higher, the tolerance of a functional group is excellent, later-phase modification of compounds of medicines, sugars, amino acids and the like is successfully realized, and an efficient method for constructing a carbon-sulfur bond is provided for researches of medicinal chemistry and biology orthogonal chemistry.

The invention provides a preparation method of petroleum base mesophase pitch with even high mesophase content. The FCC oil slurry of naphthenic crude oil or intermediate base crude oil serves as the raw material, under the action of a catalyst, haloalkane is mixed with the raw material, the temperature is increased to range from 280 DEG C to 350 DEG C, the pressure ranges from 0 MPa to 2 MPa, reaction is conducted for 5-20 h, and modified oil is obtained. Distillate oil, obtained at the temperature higher than 400 DEG C, of the modified oil is taken, the distillate oil is mixed with a co-carbonization agent, the temperature ranges from 360 DEG C to 480 DEG C, the reaction pressure ranges from 4 MPa to 10 MPa, reaction is conducted for 2-10 h, and the high-quality mesophase pitch is obtained. According to the preparation method of the petroleum base mesophase pitch with the even high mesophase content, preparation technology is simple and easy to operate, the anisotropic structure of the prepared mesophase pitch is uniform, the mesophase content is high and larger than 96 percent, the softening point is low, the temperature ranges from 240 DEG C to 260 DGE C, and the spinnability is good.

Disclosed herein are methods of protein quantification and normalization using haloalkylated tryptophan fluorescence. Complex protein samples, i.e., samples that each contain 1,000 or more distinct proteins, from diverse sources that do not have common protein profiles are treated with a halo-substituted organic compound (i.e. haloalkane) that reacts with tryptophan residues to form fluorescent products. Irradiation of the samples with ultraviolet light and the detection and quantification of the resultant fluorescent emissions from all proteins in each sample are then used to obtain comparative values for total protein content among the various samples. The values thus obtained are found to be valid indications of comparative total protein content, despite the fact that the tryptophan levels vary widely among the various proteins in any single sample and the samples, due to the diversity of their origins, tend to differ among themselves in the identities and relative amounts of the proteins that they contain. Protein samples are also normalized to correct for differences in sample dilution, sample loading, and protein transfer inconsistencies, by using stain-free detection of total protein in each of the samples, or detection of subsamples within each sample.

The invention relates to a method for preparing molecular tetrabromobisphenol-A polycarbonate. Its character shows as follow: a. it dissolves the tetrabromobisphenol-A and inhibitor in the natrium hydroxydatum, filtering. Then, it dissolves triphosgene in the halogenated alkane, filtring. b. it adds the filtered triphosgene solution to the filtered tetrabromobisphenol-A and inhibitor solution, and then it adds natrium hydroxydatum at room temperature under normal pressure, and maintains the system to be pH9-12, then it stirs the solution for 0.5-1 hours. c. it adds 10%-20% of the natrium hydroxydatum at room temperature under normal pressure, and maintains the system to be pH8-10, then it stirs the solution for 0.5-1 hours. d. it regulates the solution with acid to be neutral and takes out from the organic layer, then it washes the material with deionized water and adds fatty alcohol to precipitate white powder, then it achieves the molecular weight range of 150,000 ~ 250,000 molecular of tetrabromobisphenol-A polycarbonate through filtration and drying.

The invention discloses a synthetic method of a dicyclohexylcarbodiimide compound. The method comprises the following steps: taking dicyclohexylurea and di(trichloromethyl) carbonate as a raw material, fully reacting in an organic solvent A at the temperature of 20-110 DEG C, cooling to the room temperature after finishing the reaction, adding triethylamine and neutralizing to pH value of 7-8, post-treating a reaction solution to prepare the dicyclohexylcarbodiimide compound; wherein the organic solvent A is C1-C5 haloalkanes, C3-C8 fatty ester, ketones, ethers, benzene, toluene, xylene, chlorobenzene, nitrobenzene, cyclohexane or nitromethane. The method basically eliminates the problems of big hidden trouble of traditional technical safety and serious three wastes pollution. The method for synthesizing dicyclohexylcarbodiimide compound has the advantages of safety, reliability, simple process, less three wastes, small energy consumption, high overall yield, low cost and excellent product quality, and is suitable for industrialization production and has good economic benefit.

The invention discloses preparation and an application method of a polyionic liquid solid acid catalyst, and relates to a polyionic liquid solid acid catalyst for preparing diphenylethane via alkylation reaction of ortho xylene and styrene, and a preparation method of the polyionic liquid solid acid catalyst. The catalyst has a higher alkylation conversion rate, diphenylethane yield and reusability at high temperature and atmospheric pressure. The polyionic liquid catalyst is prepared by performing a hydrothermal reaction of a vinyl imidazole monomer, N,N-methylene bisacrylamide cross-linking agent, an initiator and a dispersant to form a precursor porous polymer, and adding the obtained precursor porous polymer into haloalkane and strong acid for reaction.

The invention relates to a preparation method of trimethylaluminium. The method comprises steps as follows: (1) magnalium and haloalkane have a contact reaction in the presence of an ether solvent and in the inert atmosphere to produce a trimethylaluminium ether complex; (2) the trimethylaluminium ether complex and an amine and/or phosphine compound with the high boiling point have a contact reaction to produce a trimethylaluminium amine complex and/or a trimethylaluminium phosphine complex; (3) the complexes obtained in Step (2) are decomposed. With the adoption of the preparation method, the yield and the purity of the trimethylaluminium can be significantly increased, the yield of the trimethylaluminium can be higher than 80%, the purity can be 99.9999%, besides, a reaction kettle used in the method can be used as an evaporation kettle, the technology and equipment are simplified, the reaction process is easy to control, the prepared product can be separated from raw materials and byproducts more easily, the method is very applicable to industrial production, in addition, the byproducts can be used for synthesizing aluminum sulfate, and almost no waste is produced.

The invention provides a photocatalytic halohydrocarbon dehalogenation conversion method which comprises the following steps: adding a photocatalyst quantum dot/rod into a solvent to obtain a solutionA; adding halohydrocarbon and an electronic sacrificial body into the solution A to obtain a solution B; utilizing a light source to irradiate the solution B and catalyzing the solution B to performhalohydrocarbon dehalogenation conversion. According to the photocatalytic halohydrocarbon dehalogenation conversion method disclosed by the invention, a nano quantum dot and a nano quantum rod are applied to dehalogenation conversion reaction of alkyl halide, alkenyl halide and alkyne halide for the first time; the reaction conditions are moderate, visible light is utilized as driving energy, a product is hydrocarbon compound, and the whole process has the advantages of environmental protection, conciseness and high efficiency. In addition, higher hydrocarbon of carbon chain growth can be generated after dehalogenation reaction, so that the method has potential application in preparation of higher hydrocarbon. According to the method disclosed by the invention, halohydrocarbon dehalogenation conversion and deuteration marking processes are jointly performed; hydrocarbon deuteration marking can be finished when a halohydrocarbon dehalogenation process is finished. The invention furtherprovides a method for performing deuteration marking on hydrocarbon.

The invention discloses a method for preparing halofuginone hydrobromide, which comprises the following steps: by using N-benzyl-3-piperidone or hydrochloride thereof, organic or inorganic base, halide of alkali metal and beta, gamma-dihaloalkene or allyl haloalkane as initial raw materials, performing Steven rearrangement reaction to obtain an intermediate VIII; performing Von Braun reaction on the intermediate VIII to obtain an intermediate VII; performing reduction reaction on the intermediate VII to obtain an intermediate VI; obtaining an intermediate V after reaction of the intermediate VI and NBS (N-bromosuccinimide); obtaining an intermediate IV after the reaction of the intermediate V and a compound 7-bromine-6-chlorine-4(3H) quinazolinone; performing deprotection on the intermediate IV to obtain an intermediate III; performing backflow processing on the intermediate III in ethanol to obtain an intermediate II; and obtaining the halofuginone hydrobromide after the salt forming reaction of intermediate II. The invention develops an efficient and simple method for synthesizing the halofuginone hydrobromide. The total yield can reach over 50 percent, cost is greatly reduced and the product has high purity.

The invention relates to a siliceous aromatic ether and aryne polymer and a preparation method thereof. The polymer is structurally characterized by comprising silicon atoms, aryne groups and an aromatic ether structure on a main chain. The siliceous aromatic ether and aryne polymer is polymerized from diacetylene-benzene or a dyhydroxy aromatic compound and dichlorosilane by Grignard reaction under an inert atmosphere. The preparation method of the polymer comprises the following steps of: firstly reacting haloalkane with magnesium powder to produce an alkyl magnesium halide Grignard reagent; and then reacting with the dyhydroxy aromatic compound to obtain an alkyl magnesium halide Grignard reagent of the dyhydroxy aromatic compound or reacting with diacetylene-benzene to obtain an alkyl magnesium halide Grignard reagent of diacetylene-benzene; and finally reacting with dichlorosilane to obtain the siliceous aromatic ether and aryne polymer. The invention has the advantages of simple process, short reaction time, easily controlled process condition and simple subsequent processing and is convenient to operate; in addition. The product of the method is stable at room temperature and easy to store, the condensate of the polymer has excellent heat-resisting stability and mechanical property and is a high-performance thermosetting resin with good heat-resisting property.

The invention discloses 'a high-valent metal fluorination catalyst and a preparation method and application thereof', and belongs to the field of chemical synthesis. The high-valent metal fluorinationcatalyst is composed of high-valent metal ions and auxiliary agents, wherein the mass percentages of high-valent metal ions and auxiliary agents are 70%-100% and 0-30% in sequence. A 'fluorine storage material' is introduced in an oxidation stage to convert low-valent metal ions into high-valent metal ions. The high-valent metal fluorination catalyst has high use temperature, high catalytic activity and long service life, and is mainly used for preparing a fluorine-containing alkane through a fluorine-chlorine exchange reaction of gas-phase catalytic halogenated alkane and hydrogen fluoride under high temperature or preparing a fluorine-containing olefin through a fluorine-chlorine exchange reaction of gas-phase catalytic halogenated olefin and hydrogen fluoride under high temperature.