METHOD FOR RECOVERY OF GASEOUS HYDROCARBONS AND/OR LIQUID HYDROCARBONS FROM UNDERGROUND

    公开(公告)号:CA2924770A1

    公开(公告)日:2015-03-26

    申请号:CA2924770

    申请日:2014-09-04

    Abstract: Provided is a method for recovery of gaseous hydrocarbons and/or liquid hydrocarbons from underground, characterized by the use of a polylactic acid resin comprising a poly-L-lactic acid component and a poly-D-lactic acid component, and having a crystal melting heat of 20 J/g or greater at 190°C or above as measured by differential scanning calorimetry, the method for recovery of gaseous hydrocarbons and/or liquid hydrocarbons from underground being capable of recovery from depths of 3,000 m or more underground. With this recovery method, shale gas, shale oil, and the like can be recovered efficiently.

    METHOD FOR PRODUCING LACTIC ACID AND METHOD FOR PRODUCING POLYLACTIC ACID

    公开(公告)号:SG2013095930A

    公开(公告)日:2015-07-30

    申请号:SG2013095930

    申请日:2009-12-25

    Abstract: Lactic acid obtained by a method for producing lactic acid, the method comprising: (A) a step of continuous fermentation wherein a fermentation culture medium of a microorganism having an ability of lactic acid fermentation is filtered through a porous membrane having an average pore size of not less than 0.01 µm and less than 1 µm with a transmembrane pressure difference within the range of 0.1 to 20 kPa, and the permeate is collected, while retaining the non-permeated liquid in or returning the non-permeated liquid to the culture, and adding a fermentation feedstock to the culture; (B) a step of filtering the permeate obtained in Step (A) through a nanofiltration membrane; and (C) a step of distilling the permeate obtained in Step (B) under a pressure of not less than 1 Pa and not more than atmospheric pressure, at 25°C to 200°C to recover lactic acid; comprises only small amounts of impurities, and a polylactic acid obtained using the lactic acid as a raw material has excellent thermal stability, mechanical strength and hue.

    METHOD FOR PRODUCING LACTIC ACID AND METHOD FOR PRODUCING POLYLACTIC ACID

    公开(公告)号:CA2748354A1

    公开(公告)日:2010-07-01

    申请号:CA2748354

    申请日:2009-12-25

    Abstract: Disclosed is a method for producing lactic acid, which comprises (A) a continuous fermentation step wherein a fermentation broth of microorganisms which are capable of lactic acid fermentation is filtrated using a porous membrane having an average pore diameter of 0.01 µm or more but less than 1 µm with a transmembrane pressure difference within a range of 0.1-20 kPa; the filtrate is recovered, while holding or flowing back the unfiltrate to the broth; and a fermentation raw material is added to the broth; (B) a step wherein the filtrate obtained in step (A) is filtrated through a nano-filtration membrane; and (C) a step wherein lactic acid is recovered by distilling the filtrate obtained in step (B) at a pressure not less than 1 Pa but not more than the atmospheric pressure at a temperature not less than 25°C but not more than 200°C. Lactic acid obtained by the method has reduced impurities, and thus a polylactic acid obtained using the lactic acid as a starting material has excellent thermal stability, mechanical strength and hue.

    METHOD FOR PRODUCING ALIPHATIC POLYESTER RESIN, AND ALIPHATIC POLYESTER RESIN COMPOSITION

    公开(公告)号:MY154053A

    公开(公告)日:2015-04-30

    申请号:MYPI20105282

    申请日:2009-05-19

    Abstract: AN ALIPHATIC POLYESTER RESIN HAVING A HIGH MOLECULAR WEIGHT AND, IN THE PREFERRED STATE, A HIGH MELTING POINT, AND EXCELLENT THERMAL STABILITY AND HUE, AND A METHOD FOR EFFECTIVELY PRODUCING THE SAME ARE PROVIDED.A METHOD FOR PRODUCING AN ALIPHATIC POLYESTER RESIN INCLUDING A MELT POLYMERIZATION STEP AND A SUBSEQUENT SOLID PHASE POLYMERIZATION STEP, USING A SULFONIC ACID GROUP-CONTAINING COMPOUND AS A CATALYST, WHEREIN THE ADDITION AMOUNT OF THE SULFONIC ACID GROUP-CONTAINING COMPOUND DURING MELT POLYMERIZATION IS 300 TO 3000 PPM WITH RESPECT TO A RAW MATERIAL MONOMER CALCULATED AS SULFER ATOMS, THE CONTENT OF THE SULFONIC ACID GROUP-CONTAINING COMPOUND DURING MELT POLYMERIZATION IS 300 TO 3000 PPM WITH RESPECT TO A PRODUCED POLYMER CALCULATED AS SULFER ATOMS, AND A RESIDUAL RATE OF THE SULFONIC ACID GROUP-CONTAINING COMPOUND AFTER SOLID PHASE AT POLYMERIZATION IS MORE THAN 50%. FURTHER, ALIPHATIC POLYESTER RESIN COMPOSITION CONTAINING A SULFONIC ACID GROUP-CONTAINING COMPOUND HAVING 2 OR MORE SULFONIC ACID GROUPS IN ONE MOLECULE IN AN ALIPHATIC POLYESTER RESIN, IN A CONTENT OF 300 TO 3000 PPM WITH RESPECT TO A PRODUCED POLYMER CALCULATED AS SULFUR ATOMS.

    POLYLACTIC RESIN COMPOSITION, MOLDED PRODUCT, AND METHOD FOR PRODUCING POLYLACTIC RESIN COMPOSITION

    公开(公告)号:CA2895274A1

    公开(公告)日:2014-08-28

    申请号:CA2895274

    申请日:2014-02-03

    Abstract: Disclosed is a polylactic resin composition made by blending 0.05-2 parts by weight of a cyclic compound having an acid anhydride or a glycidyl group to 100 parts by weight of a polylactic acid block copolymer that is constituted by poly-L-lactic acid segments including L-lactic acid as a main component, and poly-D-lactic acid segments including D-lactic acid as a main component. Also disclosed is a method for producing said polylactic resin composition. The present invention provides: a polylactic resin composition that has excellent wet-heat characteristics and dry-heat characteristics and that is improved in mechanical properties, durability, and heat resistance by the end-capping effect on said polylactic resin composition caused by said cyclic compound which has an acid anhydride or a glycidyl group; a molded product; and a method for producing said polylactic resin composition.

    METHOD FOR PRODUCING LACTIC ACID AND METHOD FOR PRODUCING POLYLACTIC ACID

    公开(公告)号:SG172400A1

    公开(公告)日:2011-08-29

    申请号:SG2011046992

    申请日:2009-12-25

    Abstract: Lactic acid obtained by a method for producing lactic acid, the method comprising: (A) a step of continuous fermentation wherein a fermentation culture medium of a microorganism having an ability of lactic acid fermentation is filtered 5 through a porous membrane having an average pore size of not less than 0.01 ttm and less than 1 pm with a transmembrane pressure difference within the range of 0.1 to 20 kPa, and the permeate is collected, while retaining the non-permeated liquid in orreturning the non-permeated liquid to the culture, and adding a fermentation feedstock to the culture: (B) a step of filtering the permeate obtained in Step (A) 10 through a nanofdtration membrane; and (C) a step of distilling the permeate obtained in Step (B) under a pressure of not less than 1 Pa and not more than atmospheric pressure, at 25°C to 200°C to recover lactic acid; comprises only small amounts of impurities, and a polylactic acid obtained using the lactic acid as a raw material has excellent thermal stability, mechanical strength and hue.

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