公开(公告)号：US4391971A

公开(公告)日：1983-07-05

申请号：US334769

申请日：1981-12-28

Applicant: Freddie L. Massey ,  Douglas D. Callander

Inventor： Freddie L. Massey ,  Douglas D. Callander

IPC: B29B13/00 ,  B29C47/00 ,  C08G63/90 ,  C08G63/70

CPC classification number: C08G63/90 ,  B29B13/00 ,  B29C47/00 ,  B29C47/0021 ,  B29C47/0023

Abstract: This invention relates to a method of improving the brightness and color of a polyester resin and reducing the acetaldehyde content by passing the resin through molecular sieves at a temperature of from 230.degree. C. to about 300.degree. C.

Abstract translation: 本发明涉及一种改善聚酯树脂的亮度和颜色并通过使树脂通过分子筛在230℃至约300℃的温度下降低乙醛含量的方法。

公开(公告)号：US4360662A

公开(公告)日：1982-11-23

申请号：US208201

申请日：1980-11-19

Applicant: Albert G. Williams

Inventor： Albert G. Williams

IPC: C08G63/90 ,  C08G63/70 ,  C08G63/74

CPC classification number: C08G63/90

Abstract: There is disclosed a continuous countercurrent extraction process for removing tertiary amine hydrochloride impurities which are soluble in water from a water immiscible polymer solution of a halogenated aromatic polyester which has a viscosity of at least about 10 poise and a density greater than about 1.0 gm/cc. This process comprises (a) introducing the polymer solution at the top of an extraction column and introducing water at the bottom of the column to form a two phase mixture, and (b) mechanically agitating the mixture in a particularly defined manner in order to extract the water-soluble impurities from the polymer solution and economically recover the tertiary amine hydrochloride.

Abstract translation: 公开了一种连续逆流提取方法，用于从卤代芳族聚酯的水不混溶性聚合物溶液中除去可溶于水的叔胺盐酸盐杂质，其具有至少约10泊的粘度和大于约1.0gm / cc的密度 。 该方法包括（a）将聚合物溶液引入萃取塔的顶部并在塔底引入水以形成两相混合物，和（b）以特别限定的方式机械搅拌该混合物以提取 来自聚合物溶液的水溶性杂质经济地回收盐酸叔胺。

公开(公告)号：US4334061A

公开(公告)日：1982-06-08

申请号：US89145

申请日：1979-10-29

Applicant: Joseph A. Bossier, III

Inventor： Joseph A. Bossier, III

IPC: C07H13/06 ,  C08G63/90 ,  C07H1/00 ,  C07H1/06

CPC classification number: C07H13/06 ,  C08G63/90

Abstract: A process for recovering polyol fatty acid polyesters from the crude reaction product in which it is produced by contacting with an aqueous washing medium in the presence of an emulsion decreasing organic solvent so that the alkali metal fatty acid soaps and the color-forming bodies are taken into the aqueous phase, and upon settling the phases are separated from each other.

Abstract translation: 从粗反应产物中回收多元醇脂肪酸聚酯的方法，其中通过在降低有机溶剂的乳液存在下与含水洗涤介质接触来制备多元醇脂肪酸聚酯，从而使碱金属脂肪酸皂和成色体被带走 进入水相，并且在沉降时，相分离。

公开(公告)号：US3939118A

公开(公告)日：1976-02-17

申请号：US508948

申请日：1974-09-24

Applicant: Alfred Horbach ,  Hugo Vernaleken

Inventor： Alfred Horbach ,  Hugo Vernaleken

IPC: C08G63/00 ,  B01D15/00 ,  C08G63/90 ,  C08G64/40 ,  C08J3/00 ,  C08G63/74 ,  C08G63/62

CPC classification number: C08G64/406 ,  Y10S260/33

Abstract: The contaminating inorganic compounds such as alkali metal salts or alkali metal hydroxides which remain in a polycarbonate solution prepared by reacting phosgene with a dihydroxy-aryl compound are removed by contacting the solution with a molecular sieve.

Abstract translation: 残留在通过光气与二羟基 - 芳基化合物反应制备的聚碳酸酯溶液中的碱金属盐或碱金属氢氧化物的污染性无机化合物通过使该溶液与分子筛接触来除去。

公开(公告)号：US3746688A

公开(公告)日：1973-07-17

申请号：US3746688D

申请日：1971-08-04

Applicant: MONSANTO CO

Inventor： BERKAU E

IPC: C08G63/88 ,  C08G63/90 ,  C08G17/003 ,  C08G22/10

CPC classification number: C08G63/90 ,  C08G63/88

Abstract: WET AMORPHOUS POLYETHYLENE TEREPHTHALATE FLAKE IS DRIED BY EXPOSING THE FLAKE TO A TEMPERATURE JUST BELOW THE CRYSTALLIZATION TEMPERATURE UNDER HIGH VACUUM UNTIL THE MOISTURE CONTENT OF THE FLAKE IS LESS THAN ABOUT 0.05 PERCENT; THEREAFTER RAISING THE TEMPERATURE TO ABOVE THE CRYSTALLIZATION TEMPERATURE WITH MINIMAL MECHANICAL AGITATION.

公开(公告)号：US3497477A

公开(公告)日：1970-02-24

申请号：US3497477D

申请日：1969-06-02

Applicant: EASTMAN KODAK CO

Inventor： BARKEY KENNETH T ,  PREDMORE WALTER L JR

IPC: C08G63/80 ,  C08G63/90 ,  C08G17/013

CPC classification number: C08G63/80 ,  C08G63/90

公开(公告)号：US2061635A

公开(公告)日：1936-11-24

申请号：US64491832

申请日：1932-11-29

Applicant: FIRM THE RESINOUS PRODUCTS & C

Inventor： KURT SANDIG

IPC: C08G63/90

CPC classification number: C08G63/90

公开(公告)号：US11834552B2

公开(公告)日：2023-12-05

申请号：US17925243

申请日：2021-05-18

Applicant: VENVIROTECH BIOTECHNOLOGY SL

Inventor： Albert Ferrer Ugalde ,  Patricia Aymà Maldonado

IPC: C08G63/89 ,  C08G63/06 ,  C08G63/90 ,  C12P7/625

CPC classification number: C08G63/89 ,  C08G63/06 ,  C08G63/90 ,  C12P7/625

Abstract: The method isolates polyhydroxyalkanoate (PHA) from a PHA-rich bacterial biomass, to the PHA isolated by the method and to a PHA having specific properties. The method treats an aqueous suspension of the PHA-rich bacterial biomass with a minimal amount of sodium hypochlorite, a methanol wash and extraction of PHA from the biomass with dimethyl carbonate (DMC).

公开(公告)号：US20230257520A1

公开(公告)日：2023-08-17

申请号：US18137822

申请日：2023-04-21

Applicant: Covation Inc.

Inventor： Hari Babu SUNKARA ,  Raja Hari POLADI

IPC: C08G63/672 ,  C08G63/82 ,  C08G63/85 ,  C08G63/90 ,  C08K5/08

CPC classification number: C08G63/672 ,  C08G63/826 ,  C08G63/85 ,  C08G63/90 ,  C08K5/08

Abstract: A process is disclosed herein comprising the steps: a) contacting a mixture comprising furandicarboxylic acid dialkyl ester, 1,3-propanediol, a zinc compound, and optionally a poly(alkylene ether) diol, at a temperature in the range of from about 120° C. to about 220° C. to form prepolymer, wherein the mole ratio of the furandicarboxylic acid dialkyl ester to the 1,3-propanediol is in the range of from 1:1.3 to 1:2.2; and b) heating the prepolymer under reduced pressure to a temperature in the range of from about 220° C. to about 260° C. to form polymer. The mixture of step a) can further comprise an anthraquinone compound.

公开(公告)号：US11725078B2

公开(公告)日：2023-08-15

申请号：US16893577

申请日：2020-06-05

Applicant: MARUZEN PETROCHEMICAL CO., LTD.

Inventor： Tomohiro Masukawa ,  Ryo Fujisawa

IPC: B01J39/05 ,  C08G63/90 ,  C08G63/66 ,  G03F7/004 ,  G03F7/039

CPC classification number: C08G63/90 ,  B01J39/05 ,  C08G63/66 ,  G03F7/0045 ,  G03F7/0392

Abstract: [Problem to be Solved]
To Provide a method for producing an acid-decomposable polymer having a reduced metal ion content, which suppresses decomposition and deprotection of the acid-decomposable polymer.
[Means to Solve the Problem]
The method for producing an acid-decomposable polymer according to the present invention comprises the steps of:



preparing a polymer solution comprising an acid-decomposable polymer;
washing an acidic cation exchanger with an organic solvent until the water content in the organic solvent discharged from the acidic cation exchanger falls to 400 ppm or less; and
passing the polymer solution through the washed acidic cation exchanger to reduce the metal ion content of the polymer.