67results about How to "Guaranteed Low Temperature Performance" patented technology

The invention discloses a sleeving method of inner and outer containers of an LNG (Liquefied Natural Gas) storage tank. The sleeving method comprises the steps of (1) preparing an outer container; (2) preparing an inner container; (3) preparing for sleeving; and (4) sleeving. Holes are formed in upper support points of the A-A and B-B support sections of the outer container, backing plates II are welded on lower support points of the A-A and B-B support sections of the outer container, an outer support ring is welded on a lower support point of the A-A section, and a glass fiber reinforced plastic support is inserted. Backing plates and an inner support ring are welded on support points of the inner container. The inner container is fixedly connected with a counterweight container, a connecting steel pipe is lifted, and the inner container is moved to sleeve. When the B-B section of the inner container reaches an inlet, the outer support ring sleeves the outer surface of the glass fiber reinforced plastic support filled with heat insulating materials, the glass fiber reinforced plastic support is pressed into the lower inner support ring, and the outer support ring and the glass fiber reinforced plastic support are supported to sleeve together with the inner container. In a specified position, the inner container falls so as to compress the glass fiber reinforced plastic support. The outer support ring of the B-B section is welded on the backing plate II, and then the upper support structure is welded, so that sleeving is completed. According to the sleeving method, the full penetration rate of the outer container is increased, leakage points of the outer container are reduced, and the vacuum leakage rate of an interlayer between the inner and outer containers is reduced.

The invention discloses a steel plate used for a high-tenacity low-temperature pressure vessel and a manufacturing method thereof. Steel comprises the following chemical components including, by weight, 0.090-0.130% of C, not greater than 0.15% of Si, 1.40-1.80% of Mn, not greater than 0.012% of P, not greater than 0.004% of S, 0.27-0.45% of V, 0.010-0.020% of N, not greater than 0.020% of Alt andthe balance Fe and inevitable impurities; and meanwhile, V / C is greater than or equal to 3 and smaller than or equal to 4, and V / (C+Si) is greater than or equal to 1.2 and smaller than or equal to 3.The steel provided by the invention is high in strength and good in low-temperature impact toughness, the minus 60 DEG C KV2 is greater than or equal to 80 J, an excellent manufacturing material is provided for the low-temperature pressure vessel, a foundation is laid for enlargement and lightweight of the low-temperature pressure vessel, furthermore, the carrying efficiency of the movable pressure vessel is greatly improved, and the economic benefit of the movable pressure vessel is greatly increased.

The invention discloses a method for hydrogenation of medium-low temperature coal tar to produce refrigerator oil base oil. The method includes: fractionating the medium-low temperature coal tar to obtain light fraction and heavy fraction, mixing the light fraction with hydrogen and leading the mixture into a hydrotreating reaction area to contact a hydrogenation protective catalyst and a hydrofining catalyst in order to undergo hydrogenation reaction; separating the hydrofining effluent, making the obtained liquid phase product enter a fractionating tower; bringing the 320-350DEG C diesel fraction obtained by fractionation into a hydro-upgrading reaction area where a hydro-upgrading catalyst containing amorphous aluminium silicon and modified Y zeolite is adopted, and performing hydro-upgrading reaction in the presence of hydrogen; subjecting the hydro-upgrading effluent into a hydrofinishing reaction area to undergo hydrofinishing reaction, and separating the hydrofinishing product to obtain the refrigerator oil base oil. The method provided by the invention adopts the medium-low temperature coal tar as the raw material to produce the refrigerator oil base oil with the characteristics of good low-temperature fluidity, corrosiveness, intersolubility with refrigerant and oxidation stability.

The invention discloses a method for hydrogenation of medium-low temperature coal tar to produce transformer oil base oil. The method includes: fractionating the medium-low temperature coal tar to obtain light fraction and heavy fraction, mixing the light fraction with hydrogen and leading the mixture into a hydrotreating reaction area to contact a hydrogenation protective catalyst and a hydrofining catalyst in order to undergo hydrogenation reaction; separating the hydrofining effluent, making the obtained liquid phase product enter a fractionating tower; bringing the 280-320DEG C diesel fraction obtained by fractionation into a hydro-upgrading reaction area where a hydro-upgrading catalyst containing amorphous aluminium silicon and modified Y zeolite is adopted, and performing hydro-upgrading reaction in the presence of hydrogen; subjecting the hydro-upgrading effluent into a hydrofinishing reaction area to undergo hydrofinishing reaction, and separating the hydrofinishing product to obtain the transformer oil base oil. The method provided by the invention adopts the medium-low temperature coal tar as the raw material to maximumly produce the transformer oil base oil with the advantages of high density, volume, high volume calorific value, low aromatic hydrocarbon content, and good low temperature performance.

The invention discloses a method for hydrogenation of medium-low temperature coal tar to produce large-specific weight aviation kerosene. The method includes: fractionating the medium-low temperature coal tar to obtain light fraction and heavy fraction, mixing the light fraction with hydrogen and leading the mixture into a hydrotreating reaction area to contact a hydrogenation protective catalyst and a hydrofining catalyst in order to undergo hydrogenation reaction; separating the hydrofining effluent, making the obtained liquid phase product enter a fractionating tower; bringing the 140-290DEG C kerosene fraction obtained by fractionation into a hydro-upgrading reaction area where a hydro-upgrading catalyst containing amorphous aluminium silicon and modified Y zeolite is adopted, and performing hydro-upgrading reaction in the presence of hydrogen; subjecting the hydro-upgrading effluent into a hydrofinishing reaction area to undergo hydrofinishing reaction, and separating the hydrofinishing product to obtain the large-specific weight aviation kerosene. The method provided by the invention adopts the medium-low temperature coal tar as the raw material to maximumly produce the large-specific weight aviation kerosene with the advantages of high density, volume, high volume calorific value, low aromatic hydrocarbon content, and good low temperature performance.

The invention provides an asymmetrical poly star polymer as well as a preparation method and application thereof, and belongs to the field of a high-molecular polymer. The polymer has a structural general formula of (S1)nT(S2)m, wherein S1 is X1-(EP)a; X1 is polydivinylbenzene cores; EP is polyisoprene arms; a is the arm number; the value range of the a is 3 to 20; S2 is X2-(EB)b; the X2 is polydivinylbenzene cores; EB is polybutadiene arms or the polyisoprene arms; b is the arm number; the value range of the b is 3 to 20; the m and the n are positive integers; the value ranges of the m and the n are both 1 to 20; T is a coupling agent. The invention also provides a preparation method of the asymmetrical poly star polymer. The invention also provides application of the asymmetrical poly star polymer as a lubricating oil viscosity index improving agent. The low-temperature performance is ensured; meanwhile, the high-temperature thickening capability of a viscosity index agent is furtherimproved; the use range is wide; the application to various kinds of basic oil can be realized.

The invention discloses a method for producing white rubber filling oil base oil through catalytic slurry oil hydrogenation. The method comprises the following steps: catalytic slurry oil is subjected to fractionation, such that a light fraction and a heavy fraction are obtained; the light fraction is mixed with hydrogen, and the mixture enters a hydrogenation treatment reaction zone; the mixture sequentially contacts a hydrogenation protection catalyst, a hydro-refining catalyst and a hydro-upgrading catalyst A, such that a hydrogenation reaction is carried out; a hydrogenation treatment effluent enters a hydro-upgrading reaction zone; a hydro-upgrading catalyst B containing amorphous silica-alumina and modified Y zeolite is adopted in the hydro-upgrading reaction zone, and a hydro-upgrading reaction is carried out under the existence of hydrogen; a hydro-upgrading effluent enters a hydro-finishing reaction zone, and is subjected to a hydro-finishing reaction; and a hydro-finishing product is separated, such that the rubber filling oil base oil is obtained. According to the invention, the catalytic slurry oil is adopted as a raw material, and can be used for producing the white rubber filling oil base oil with good low-temperature fluidity, good intersolubility with rubber, and good oxidation stability.