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公开(公告)号：JPS55115839A
公开(公告)日：1980-09-06
申请号：JP2425079
申请日：1979-03-01
Applicant: TORAY INDUSTRIES
Inventor： KONDOU RIYOUZOU , NOGI TATSUO , IKENO SHIGEO
IPC: C07C47/045 , C07C45/00 , C07C67/00
Abstract: PURPOSE:To recover formaldehyde (H) effectively, by heating H in stripping step between the dissolving and regeneration of cellulose under specific conditions. CONSTITUTION:A cellulose solution, obtained by heating cellulose, dimethyl sulfoxide, and excess low-polymerization degree polyoxymethylene (P), is heated at 115-135 deg.C, preferably 120-130 deg.C, for 0.5-5hr to strip and recover formaldehyde within the range below the amount of P and formaldehyde formed through decomposition of P of 0.2pts.wt. per unit weight of the cellulose.
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公开(公告)号：JPS55100206A
公开(公告)日：1980-07-31
申请号：JP609879
申请日：1979-01-24
Applicant: TORAY INDUSTRIES
Inventor： OZASA SHIGEFUMI , KONDOU RIYOUZOU , IKENO SHIGEO
IPC: C01B25/234 , C01B25/18
Abstract: PURPOSE:To efficiently recover high purity orthophosphoric acid reusable as catalyst from phosphoric acid catalyst-contg. depolymerization residue by heat calcining the residue after which orthophosphoric acid is extracted with water and contacted to an h-type strongly acidic cation exchange resin. CONSTITUTION:Polycaprolactam or oligocaprolactam depolymerization residue is heat calcined. Water or an aq. sulfuric acid soln. is added to the resulting carbide and boiled to hydrolyze condensed phosphoric acid, and an aq. orthophosphoric acid soln. is extracted. The extracted soln. is then filtered to remove insol. carbide and contacted to an h-type strongly acidic ion exchange resin such as phenol sulfonic acid resin to remove alkali metals and other impurities bonded to the acid, thus recovering an aq. orthophosphoric acid soln. of high purity. By this method phosphoric acid catalyst for depolymerization can be used repeatedly.
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公开(公告)号：JPS57212130A
公开(公告)日：1982-12-27
申请号：JP9525481
申请日：1981-06-22
Applicant: TORAY INDUSTRIES
Inventor： SETSUDA TSUTOMU , KONDOU RIYOUZOU , OOKUBO TAKASHI
Abstract: PURPOSE:To carry out the denitration reaction of an organic nitric acid ester, without using complicated operations or external energy source, by the hetero- phase treatment of a hydrophobic phase containing said ester with an aqueous liquid phase containing the hydrosulfide, sulfide or polysulfide of ammonium or alkali metal. CONSTITUTION:A hydrophobic liquid phase especially chlorinated hydrocarbon solution containing
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Patent Agency Ranking
公开(公告)号：JPS57165426A
公开(公告)日：1982-10-12
申请号：JP5123581
申请日：1981-04-07
Applicant: TORAY INDUSTRIES
Inventor： KONDOU RIYOUZOU , FUJIWARA KATSUAKI , OZASA SHIGEFUMI
Abstract: PURPOSE:A water-soluble macromolecular amine such as bis(gamma-aminopropyl) polyethylene glycol is brought into contact with a sulfonic acid-type and quaternary ammonium type ion-exchange resin to remove low-molecular impurities, thus effecting its purification. CONSTITUTION:A water-soluble macromolecular amine such as bis(gamma-aminopropyl) PEG, which is prepared by hydrogenation of cyanoethylated polyethylene glycol, (100pts.wt.) is dissolved in water or aqueous alcohol (10-900pts.) and brought into contact with a sulfonic acid-type ion-exchange resin (regenerated into free H type) and/or quaternary ammonium type ion-exchange resin (regenerated into OH type) to effect purification. EFFECT:This process is useful for purification of an amine produced from a cyanoethylation product.
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公开(公告)号：JPS5499173A
公开(公告)日：1979-08-04
申请号：JP518478
申请日：1978-01-23
Applicant: TORAY INDUSTRIES
Inventor： IKENO SHIGEO , KONDOU RIYOUZOU , IKEYAMA AKIO
Abstract: PURPOSE:To regenerate only polyamide selectively from wastes containing the polyamide, by dissolving the wastes in hydrous ethylene glycol to remove undissolved substances, and by cooling the solution. CONSTITUTION:Wastes comprising polyamide or its mixture with other substances are dissolved in ethylene glycol containing 0.1-10 wt.% of water at 120 deg.C or above, preferably 190 deg.C or below, and the undissolved substances are removed by filtration and centrifugation. The solution is then cooled to deposit the polyamide, which is recovered. Polymer wastes discharged from textile manufacturing factories, fibrous wastes, woven fabrics, tire cords, carpet, and films may be used as the wastes. When the dissolving temperature is lower than 120 deg.C, the polyamide cannot be dissolved well to worsen the operating efficiency. Too high temperature is undesirable due to trouble to equipment.
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公开(公告)号：JPS59219253A
公开(公告)日：1984-12-10
申请号：JP9406483
申请日：1983-05-30
Applicant: TORAY INDUSTRIES
Inventor： SETSUDA TSUTOMU , KONDOU RIYOUZOU , ICHIMURA FUMIO
IPC: B01J23/75 , B01J23/00 , B01J23/74 , C07B61/00 , C07C67/00 , C07C209/00 , C07C209/48 , C07C211/09 , C07C87/14
Abstract: PURPOSE:To obtain the titled compound useful as a raw material for the polymerization of polyamide, in high yield and purity, suppressing the side reactions, by hydrogenating aminocapronitrile under specific condition. CONSTITUTION:The objective compound can be produced by reacting aminocapronitrile with hydrogen under hydrogen-pressure of 1-50kg/cm at 50-140 deg.C in the presence of a cobalt/alumina catalyst and 0.2-4, preferably 0.5-2pts.wt. of water, based on 100pts.wt. of the nitrile. Preferably, the reaction is carried out by adding 0.01-1pts.wt., based on 100pts.wt. of the nitrile, of a caustic alkali, e.g. caustic soda, etc. to the reaction system. EFFECT:The catalytic activity can be remarkably increased by the presence of water in the reaction system, and the rate of reaction can be doubled compared with the anhydrous reaction system.
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公开(公告)号：JPS57105224A
公开(公告)日：1982-06-30
申请号：JP18134280
申请日：1980-12-23
Applicant: TORAY INDUSTRIES
Inventor： KONDOU RIYOUZOU , OOKUBO TAKASHI , MORI AKIRA
Abstract: PURPOSE:To remove SO2 in high efficiency by contacting SO2 containing HCl gas with saturated HCl containing nitric acid. CONSTITUTION:When cycloalkane oxime hydrochloride 2 prepared in a photo- nitrosation apparatus 1 of cycloalkane is rearranged with sulfuric acid in a Beckmann's rearrangement apparatus 3, lactam sulfate and waste gas 6 consisting essentially of gaseous HCl and a small amount of SO2 are generated. This waste gas is introduced into oxidation reaction apparatus 7 and, on the other hand, saturated HCl solution 13 containing nitric acid replenished from a storage tank 8 is supplied to 7 through a pump 9 and a pipe to bring both material into contact. SO2 in the waste gas 6 is reacted with HNO3, and HCl to form H2SO4, and SO2 is removed. The HCl solution 13 is recirculated to be reused but, because SO2 removal ratio is lowered if H2SO4 concn. is raised, H2SO4 is appropriately discharged out of the system from a discharge port 10.
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公开(公告)号：JPS55115840A
公开(公告)日：1980-09-06
申请号：JP2424979
申请日：1979-03-01
Applicant: TORAY INDUSTRIES
Inventor： KONDOU RIYOUZOU , YOKOYAMA TSUKASA , IKENO SHIGEO
IPC: C07C47/058 , C07C45/00 , C07C67/00
Abstract: PURPOSE:To bring a gas containing formaldehyde (K), stripped in a stripping step between dissolving and regeneration steps, into contact with a hydrous DMSO solution for recovering excess K used in the regeneration of cellulose. CONSTITUTION:Cellulose (C), a low-polymerization degree polyoxymethylene (F), and DMSO (D) are fed to the dissolving step A to give a formaldehyde adduct solution in D. The solution is then fed to the stripping step E, and heated with the carrier gas G to change excess F into the mixed gas Fg, which is fed to the gas- liquid contact step H. K in the mixed gas Fg is collected by the hydrous DMSO solution filled into the step H and external circulation system, and converted into F to give a slurry of F. F obtained by separation of the slurry or the slurry is directly fed to the step A.
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