13 results about "Halogenated alcohol" patented technology

The invention provides a halohydrin dehalogenase mutant and an application of the halohydrin dehalogenase mutant in synthesis of a chiral gamma-amino alcohol compound. Halogenated alcohol dehalogenase mutants enabling 2-substituted oxetane to be subjected to ring opening are obtained through the technologies of gene mining, directed evolution and the like, and the enzymes can directly perform ring opening on a substrate 2-aryl oxetane under the action of a nucleophilic reagent to generate a series of chiral gamma-amino alcohol compounds which are important precursors for synthesizing drugs. Therefore, the halohydrin dehalogenase mutants have important application value in the industry.

The application belongs to the technical field of chemical synthesis, and particularly relates to a method for asymmetrically synthesizing adjacent halogenated alcohol compounds. The cis adjacent halogenated alcohol compound is prepared through catalytic hydrogenation of asymmetric dynamic kinetic resolution of alpha halogenated ketone. The method has mild reaction conditions, excellent enantiomer and diastereomer selectivity, high efficiency and good yield, and has good application prospect.

The invention discloses a polymer brush with a nanoscale microphase separation structure, a polymer film and a preparation method of the polymer film, the polymer brush comprises a liquid crystal unit, and the preparation method comprises the following steps: reacting the liquid crystal unit with halogenated alcohol to prepare a liquid crystal side chain; reacting the liquid crystal side chain with norbornene dianhydride to prepare a liquid crystal monomer containing carboxyl at the tail end; reacting the liquid crystal monomer containing carboxyl at the tail end with fatty alcohol or difatty glyceride to obtain a block type liquid crystal monomer; and carrying out ring-opening metathesis reaction on the block type liquid crystal monomer under the action of a Grubbs catalyst to prepare the polymer brush. The introduction of the liquid crystal unit provides stronger driving force for microphase separation of the brush polymer, so that the nanoscale microphase separation structure can be directly obtained through an annealing process under the condition of not adding any guide layer.

The invention discloses a method for preparing poly (cyclohexane dioctyl phthalate) glycol ester from waste PET (polyethylene terephthalate). In particular to a solvent composition for dissolving PET (polyethylene terephthalate), which is characterized by comprising a first solvent and a second solvent, the first solvent is a halogenated alcohol solvent or a cyclic ether solvent; the second solvent is one or more of a cyclic ether solvent, a chain ether solvent, a nitrile solvent, a ketone solvent or a haloalkane solvent; the chain ether solvent is a chain ether solvent with the oxygen atom number of 2 to 4; the volume ratio of the first solvent to the second solvent is 1: (1-5); the first solvent and the second solvent are not the same solvent. The method has remarkable advantages in the aspects of raw material adaptability, reaction efficiency and industrial potential, and efficient conversion from low-end waste PET to high-added-value PECHD is realized.

The invention provides siloxane-terminated liquid rubber and a preparation method thereof, and the preparation method comprises the following steps: adding a hydroxyl protection reagent, a nitrogen-containing organic compound and halogenated alcohol into a non-polar solvent, and removing a nitrogen-containing organic compound-hydrogen chloride complex to obtain a protection group initiator intermediate solution; alkali metal is added into the protecting group initiator intermediate solution for reaction, and a protecting group initiator is obtained; initiating butadiene polymerization by using a protecting group initiator, and then carrying out an end capping reaction to obtain a polymerized glue solution; the preparation method comprises the following steps: adding deionized water and acid into a polymerized glue solution to obtain a dihydroxy-terminated polymerized glue solution, then adding a silane end-capping reagent, a nitrogen-containing organic compound and deionized water, and removing a nitrogen-containing organic compound-hydrogen chloride complex to obtain siloxane-terminated liquid rubber, so that the mixing uniformity of white carbon black and a rubber sizing material is remarkably improved; and the rolling resistance and hysteresis loss of the tire are effectively reduced, so that the tire has excellent dynamic performance.

The invention relates to a method for recovering propylene glycol and propylene glycol methyl ether from alcohol ether wastewater, which is characterized by comprising the following steps of: a, mixing the alcohol ether wastewater with an extracting agent, and separating to obtain a heavy phase and a light phase; b, separating the heavy phase obtained in the step a to obtain a product containing propylene glycol and / or propylene glycol ether; the extraction agent comprises halogenated alcohol. The method is simple, efficient, convenient to operate, low in energy consumption, high in yield and purity of propylene glycol and propylene glycol ether and suitable for large-scale production.

The invention discloses a method for preparing vicinal diol, which comprises the following steps: carrying out contact reaction on raw materials containing olefin, an oxidant and halogenated alcohol in the presence of a titanium silicalite molecular sieve catalyst and a hydration catalyst to obtain a vicinal diol-containing product, and has the advantages of mild reaction conditions, simple operation process and high yield. The method has the characteristics of high oxidant conversion rate and effective utilization rate, high vicinal diol selectivity and low product separation energy consumption.

The present invention relates to bis(fluorosulfonyl)imide salts, and their preparation methods. More specifically, the invention provides a new salt of bis(fluorosulfonyl)imide containing from 0.01 ppm to 10000 ppm of a halogenated alcohol. The invention further relates to a method for producing said salt of bis(fluorosulfonyl)imide, said method comprising a step of crystallizing a raw salt of bis(fluorosulfonyl)imide within a crystallization solvent comprising at least a halogenated alcohol. The use of said salt of bis(fluorosulfonyl)imide is also disclosed.

The application relates to the technical field of organic synthesis, and particularly relates to a method for electrochemically synthesizing isothiocyanate. The method for electrochemically synthesizing isothiocyanate comprises the following steps: sequentially adding an electrolyte, an electrolytic solvent and a reaction substrate into an electrolytic cell without a diaphragm, inserting an anode and a cathode, stirring, performing reaction under the condition of constant current at normal pressure, and after the reaction is completed, performing organic extraction on the electrolyte, and then separating and purifying isothiocyanate; the potential interval is 0.3-2.0 V; the electrolytic solvent is a halogenated alkane and / or a halogenated alcohol; the reaction substrate is an aromatic derivative with an ethyl group and trimethylsilyl isothiocyanate; the temperature is controlled in the range of 10-40 DEG C; the cathode and the anode are modified by a catalyst, and the catalyst is a bimetallic alloy nanoparticle formed by a carbon-supported noble metal and a transition metal element. The application meets the demand of the reaction mechanism of high-efficiency synthesis of isothiocyanate, and efficiently generates isothiocyanate products.

The invention discloses a method for recovering ethanol in precipitation type carrier mother liquor, and relates to the technical field of catalyst preparation, in particular to a method for recovering ethanol in precipitation type carrier mother liquor, which comprises the following steps: adding hydrogen chloride into the precipitation type carrier mother liquor, reacting I, and distilling to obtain recovered ethanol; the precipitation type carrier mother liquor is obtained in precipitation type carrier preparation; the preparation method of the precipitation type carrier comprises the following steps: emulsifying a mixture of magnesium halide, an alcohol compound and an optional inert liquid medium to obtain an emulsified product, reacting the emulsified product with an ethylene oxide compound II, and separating to obtain the precipitation type carrier and a precipitation type carrier mother solution; according to the present invention, the residual carrier in the precipitation type carrier mother liquor can promote the reaction of hydrogen chloride and the ethylene oxide compound to generate the halogenated alcohol, the ethanol recovery can be achieved through distillation, the cost is saved, the additional addition of the catalyst for the reaction of the hydrogen chloride and the ethylene oxide compound is not required, the cost is saved, and the re-separation of the catalyst is not required.

The invention relates to the technical field of organic synthesis, in particular to a method for electrochemical synthesis of isothiocyanate. The invention relates to a method for electrochemical synthesis of isothiocyanate, which comprises the following steps: sequentially adding an electrolyte, an electrolytic solvent and a reaction substrate into a diaphragm-free electrolytic tank, inserting an anode and a cathode, stirring, carrying out a reaction under the conditions of normal pressure and constant current, after the reaction is completed, carrying out organic extraction on the electrolyte, and then separating and purifying to obtain the isothiocyanate, the potential interval is 0.3 to 2.0 V; the electrolytic solvent is halogenated alkane and / or halogenated alcohol, the reaction substrates are aromatic derivatives with ethyl and trimethylsilyl isothiocyanate, and the temperature is controlled to be 10-40 DEG C; the cathode and the anode are modified by a catalyst, and the catalyst is bimetallic alloy nanoparticles formed by a carbon-loaded noble metal and a transition metal element. According to the method, the reaction mechanism requirement of efficient synthesis of isothiocyanate is met, and the isothiocyanate product is efficiently generated through the reaction.

A method for producing a polyol according to the present invention comprises: (a) a step of polymerizing 3-hydroxypropionic acid to produce poly 3-hydroxypropionic acid; and (b) a step of reacting the poly 3-hydroxypropionic acid with a halogenated alcohol. According to the present invention, a novel polyol formed by the reaction of poly 3-hydroxypropionic acid with a halogenated alcohol can be provided, and accordingly, a polyol having physical properties that are flame-retardant than polyester polyol can be provided.

The invention relates to a preparation method of a tetrahydropyrone derivative, which comprises the following steps: in water and an organic solvent, reacting a compound shown as a formula (I) with oxygen under the action of a metal simple substance and an inorganic reducing agent, and after the reaction is finished, carrying out post-treatment to obtain a compound shown as a formula (II). According to the invention, Cis-2, 6-disubstituted-4, 4 '-diazabicyclo [3, the method comprises the following steps: by taking 4, 4 '-dihalogenated tetrahydropyran as an initial raw material, carrying out single electron transfer reaction on one halogen atom on carbon gem dihalogenated hydrocarbon in a water phase under the participation of elemental metal to generate an alkyl radical containing one halogen atom on the same carbon, and capturing oxygen in the air by the alkyl radical to generate a same-carbon gem-halogenated peroxy radical intermediate; the intermediate is subjected to hydrogen and reduction reaction with a reducing agent to obtain an intermediate product isocarbon gem-halogenated alcohol, the alcohol is very easy to hydrolyze into a corresponding product tetrahydropyrone in water, and the method has the advantages that the raw materials are easy to obtain and low in price, the synthesis route is simple, and the yield is high.