32results about How to "Not easy to sublimate" patented technology

The invention provides a new method for preparing a noble metal catalyst for chloroethylene reaction with acetylene. In the method, active carbon and molecular sieve are used as carriers, ruthenium trichloride of noble metal chloride is used as an active center, the active center is carried on the carriers by adopting an immersion method, and the novel catalyst is obtained by means of drying and the like; the catalyst shows high activity and selectivity in the application in preparing the chloroethylene by acetylene hydrochlorination; and the method has the characteristics of simple process, short production period, safe and environment-friendly raw materials and low equipment cost. Compared with the current widely-applied carried mercuric chloride catalyst, the ruthenium trichloride active center has the advantages that: although the price is relatively high, the consumption of the ruthenium trichloride active center is extremely low in the preparation, so the cost is low; and because of extremely low toxicity, the catalyst can be taken as a good substitute for a mercury-containing catalyst.

The invention discloses a porous solid carrier-supported ionic liquid-promoted palladium catalyst. The catalyst is prepared according to the following method: mixing a prepared palladium-containing solution and an ionic liquid to obtain a mixed solution; dropwise adding the mixed solution to a porous solid carrier at a temperature of 20-60 DEG C under action of ultrasonic waves, and performing impregnation under the effect of ultrasonic waves for 0.5-6 hours by employing an equivalent-volume impregnation method; dropwise adding an inorganic salt solution to the porous solid carrier impregnatedwith the mixed solution under the action of ultrasonic waves at a temperature of 20-60 DEG C, and performing impregnation under the action of ultrasonic waves for 1 to 20 hours; and performing vacuumdrying at a temperature of 60-120 DEG C for 3 to 30 hours, so as to obtain the supported type ionic liquid-promoted palladium catalyst. The active components of the catalyst are not easily sublimated. The catalyst has good stability, long running time, high catalytic activity, simple preparation and convenient operation.

The invention discloses a new method of chloroethylene through acetylene method and specific equipment, which comprises the following steps: disposing raw material gas strictly; reacting two-segment compensation; recycling heptane; cooling; radiating; providing specific catalyst and reactor to synthesize chloroethylene; disposing effluent with mercury to obtain high-purity chloroethylene monomer.

The invention discloses a vulcanized ionic liquid complex palladium catalyst, and a preparation method and applications thereof. According to the preparation method, an ionic liquid is subjected to sulfuration modification to introduce sulfur containing groups, and the treated ionic liquid is loaded with PdCl2 precursor so as to form a Pd-S-IL system with a special structure, and increase both thereaction activity and the stability of the palladium catalyst. The supported ionic liquid promoted palladium catalyst possesses relatively high stability in ethyne hydrochlorination, after 6000h of operation, no palladium loss is detected, the highest ethyne conversion rate is 99.8%, and the highest vinyl chloride selectivity is 99.95%.

The invention discloses a ruthenium-based catalyst used for producing vinyl chloride through acetylene hydrochlorination, wherein the ruthenium-based catalyst is prepared by using a freeze drying method, such that the influence on the stability of the catalyst due to the migration of the active component in the pore channel of the catalyst onto the carrier surface along with the volatilization ofthe water during the preparing in the catalyst in the common vacuum drying method is avoided. According to the present invention, with the application of the ruthenium-based catalys in the vinyl chloride production through acetylene hydrochlorination, the ruthenium-based catalyst has high stability, the ruthenium loss is not detected within the detection limit of the detector after the long-time operation for 8000 h, the acetylene conversion rate can be up to 99.8%, and the vinyl chloride selectivity can be up to 100%.

The invention discloses a supported type ionic liquid promoted [PdSCl<x>]<x> compound catalyst. The supported type ionic liquid promoted [PdSCl<x>]<x> compound catalyst is composed of a porous solid carrier, and ionic liquid and a [PdSCl<x>]<x> compound which are loaded onto the surface of the porous solid carrier, wherein x=1, 2, or 3, the [PdSCl<x>]<x> ionic compound is formed via taking Pd as the core via bonding of S and Cl with Pd through ionic bonds; the anion of the ionic liquid is chloride ion, and the cation is one or a plurality of ions selected from iminazole, quaternary ammonium, quaternary phosphonium, or pyrrolidine ionic liquid. The ionic liquid load capacity is controlled to be 2.5 to 25wt% based on the mass of the carrier, the load capacity of Pd is controlled to be 0.05 to 1wt%, the load capacity of S is controlled to be 0.1 to 5wt%. The supported type ionic liquid promoted [PdSCl<x>]<x> compound catalyst possesses relatively high ethyne hydrochlorination reaction activity, and excellent stability; after operation of 2000h, no obvious palladium loss is detected, the highest conversion rate of ethyne is 100%, and the highest vinyl chloride selectivity is 100%.

Provided is a liquid crystal aligning agent which exhibits excellent storage stability during refrigerated storage by using a crosslinkable compound that comprises a photoreactive group and has high solubility in liquid crystal aligning agents. This liquid crystal aligning agent is capable of improving the response speed of a liquid crystal display element which comprises a liquid crystal alignment film that is formed from this liquid crystal aligning agent. A liquid crystal aligning agent which contains a crosslinkable compound represented by formula [1] wherein two or more polymerizable groups (Py1, Py2) and ten or less crosslinkable groups (CL1, CL2) are bonded to a parent nucleus that is composed of a divalent or higher-valent organic group. (In formula [1], L-M-R represents a parent nucleus; each of L and R represents a carbon ring or heterocyclic ring having 4-12 carbon atoms; M represents a single bond or the like; each of S1, S2, S3 and S4 represents a single bond or the like; each of l, o, n and m represents an integer of 1 or more; n + m is 10 or less; and l + o is 10 or less.)

The invention discloses a supported-type sulfuretted-ionic-liquid-promoted ruthenium catalyst. The supported-type sulfuretted-ionic-liquid-promoted ruthenium catalyst is composed of a porous solid carrier and a Ru-S-IL compound loaded on the porous solid carrier. According to a preparation method, ionic liquid is subjected to sulfuration modification so as to realize introduction of sulfur containing groups, the Ru precursor is loaded with the ionic liquid so as to form the Ru-S-IL system with a special structure, increase the activity and stability of ruthenium based catalysts, and achieve high reaction activity and stability. In applications, the supported-type sulfuretted-ionic-liquid-promoted ruthenium catalyst possesses advantages such as low load capacity, high activity and stability, and excellent economic and industrial application value.

The present invention discloses an ice coating method for surfaces of quick-frozen fish and relates to the field of aquatic product processing. The ice coating method comprises the following steps: 1,killing live fish and after conducting bloodletting and viscera removal, respectively conducting cleaning with cold water, light salt brine and cold water; 2, conducting quick-freezing to enable thecenter temperature of the fish to be quickly reduced to -25 DEG C or below; 3, soaking the fish in a first ice coating solution for 3-8 seconds and carrying out a first-layer ice coating; 4, soaking the fish in a second ice coating solution for 3-8 seconds and carrying out a second-layer ice coating; 5, conducting modified atmosphere packaging; 6, conducting cryopreservation. The ice coating method uses double layers of ice coats, the first layer of the ice coat are adopted, the first layer of the ice coat is relatively good in oxidation resistance, safe and non-toxic, also does not affect flavor of quick-frozen fish, and can effectively keep the original condition, color and luster and freshness of the quick-frozen fish; and the second layer of the ice coat has good compactness and moisture resistance, is also strong in adhesive force and not easy to sublimate, can well isolate contact between air and fish, effectively maintains the freshness of the quick-frozen fish, and enables thefish to be relatively small in quality characteristic changes after rehydration and have a shelf life of one year.

The invention provides a palladium compound PdSxCl2-2x (wherein x is more than 0 and less than 1) being stable in an acetylene atmosphere at a high temperature and having a catalysis activity on acetylene hydrochlorination for synthesizing vinyl chloride. The palladium compound comprises a porous solid carrier and a PdSxCl2-2x compound supported on the surface of the porous solid carrier, the PdSxCl2-2x compound is a PdSxCl2-2x ionic compound formed through using Pd as the core and bonding S and Cl with Pd through ionic bonds, wherein x is more than 0 and less than 1, the loading quantity of the Pd element is 0.05-1% of the weight of the carrier, and the loading quantity of the S element is 0.1-5% of the weight of the carrier. The ionic bonds between Pd and S and between Pd and Cl in the PdSxCl2-2x compound formed through introducing the S element to the PdSxCl2-2x compound are stronger than ionic bonds of PdCl2 or [PdCl4]<2->, so sublimation induced loss of a complex formed by the PdSxCl2-2x compound used as an active site and C2H2 is difficult, thereby the stability of the supported palladium catalyst in an acetylene hydrochlorination reaction is improved.

The invention relates to an azabicyclo tertiary amine complex catalyst and a preparation method thereof. The azabicyclo tertiary amine complex catalyst can be used for synthesizing methyl 2-[2-[6-chloropyrimidin-4-yloxy]phenyl]-3,3-dimethoxypropanoate (III) and methyl (E)-2-[2-[6-(2-cyanophenoxy)pyrimidin-4-yloxy]phenyl]methoxyacrylate (V). The catalyst can significantly increase the yield of an etherification reaction, and can be used to obtain a product having a purity of above 99.4% and a white color.

The invention provides a thioether type compound and also relates to a synthesis method of the thioether type compound and application of the thioether type compound. A chemical structure of the thioether type compound enables the thioether type compound to have a relatively high melting point and be not easily sublimated, so that the thioether type compound has relatively good thermal stability;the thioether type compound has an excellent anti-oxidization capability and has no toxic and side effects, so that the thioether type compound has relatively high utilization safety; secondly, a target compound is synthesized by the synthesis method of the thioether type compound, provided by the invention, by adopting one-step reaction; visibly, the synthesis method is simple to operate, moderate in technological conditions, green and environmentally friendly, and is very suitable for large-scale industrial production. A series of experiments prove that the thioether type compound has an obvious inhibition effect on oxidization of various foods and an anti-oxidization effect of the compound has a certain dose-effect relationship with the concentration of the compound; therefore, the thioether type compound provided by the invention has a wide application prospect and a good market potential.