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    • 7. 发明申请
    • METHOD FOR PRODUCING (METH)ACRYLIC ACID
    • 生产(甲基)丙烯酸的方法
    • WO2005080310A1
    • 2005-09-01
    • PCT/KR2005/000427
    • 2005-02-18
    • LG CHEM, LTD.
    • KANG, Seong-PilCHOI, Seok-HwanHA, Kyoung-SuKIM, Geon-YongWOO, Boo-GonLEE, Sang-YounKIM, Young-BaeKANG, Koo-Hyun
    • C07C51/43
    • C07C51/48C07C57/04
    • The present invention relates to a method for producing (meth)acrylic acid comprising a process of recovering (meth)acrylic acid as an aqueous (meth)acrylic acid from a (meth)acrylic acid-containing gas mixture produced by the catalytic gas phase oxidation of at least one reactant selected from the group consisting of propane, propylene, isobutylene and (meth)acrolein, and a system usable for the method. The recovery process comprises the steps of: (1) feeding the (meth)acrylic acid-containing gas mixture into a quenching tower and condensing it in the quenching tower so as to recover an aqueous (meth)acrylic acid solution from the bottom of the quenching tower, in which some of the recovered aqueous solution of (meth)acrylic acid is recycled to the top part of the quenching tower so as to condense the (meth)acrylic acid-containing gas mixture; (2) passing the uncondensed part of the (meth)acrylic acid-containing gas mixture from the quenching tower through the top of the quenching tower to an absorption column; (3) absorbing (meth)acrylic acid contained in the uncondensed part of the (meth)acrylic acid-containing gas mixture in the absorption column with a absorption solvent; (4) feeding the (meth)acrylic acid solution resulting from the absorption in the step (3) to a desorption column; and (5) separating the solvent used in the step (3) from the (meth)acrylic acid solution in the desorption column, so that the substance from which the solvent has been removed in the desorption column is fed to the quenching tower, and the separated solvent is recycled to the absorption column. The inventive method is an efficient and economic method which allows a reduction in energy consumption in subsequent purification processed by maximizing the concentration of an aqueous solution of (meth)acrylic solution recovered at the bottom of the quenching tower and minimizing the concentration of (meth)acrylic acid lost from the vent gas of the absorption column.
    • 本发明涉及一种生产(甲基)丙烯酸的方法,包括从由(甲基)丙烯酸的气体混合物通过催化气相氧化制备的(甲基)丙烯酸水溶液回收(甲基)丙烯酸的方法 的至少一种选自丙烷,丙烯,异丁烯和(甲基)丙烯醛的反应物,以及可用于该方法的系统。 回收方法包括以下步骤:(1)将含(甲基)丙烯酸的气体混合物进料到淬火塔中,并将其冷凝在淬火塔中,以从底部回收(甲基)丙烯酸水溶液 淬火塔,其中一些回收的(甲基)丙烯酸水溶液被再循环到淬火塔的顶部,以冷凝(甲基)丙烯酸的气体混合物; (2)将来自淬火塔的(甲基)丙烯酸混合气体的未冷凝部分通过淬火塔的顶部通入吸收塔; (3)用吸收溶剂吸收吸收塔中含(甲基)丙烯酸的气体混合物的未缩合部分中所含的(甲基)丙烯酸; (4)在步骤(3)中将由吸收产生的(甲基)丙烯酸溶液进料到解吸塔; 和(5)将步骤(3)中使用的溶剂与解吸塔中的(甲基)丙烯酸溶液分离,使得在解吸塔中除去溶剂的物质被供给至淬火塔, 将分离的溶剂再循环至吸收塔。 本发明的方法是一种有效和经济的方法,其允许通过使在淬火塔底部回收的(甲基)丙烯酸溶液的水溶液的浓度最大化并使(甲基) 丙烯酸从吸收塔的排气中流失。
    • 8. 发明申请
    • METHOD FOR PREPARING HIGH MOLECULAR WEIGHT POLYCARBONATE
    • 制备高分子量聚碳酸酯的方法
    • WO2003100206A1
    • 2003-12-04
    • PCT/KR2003/001048
    • 2003-05-28
    • LG CHEM, LTD.KIM, Jong-HunWOO, Boo-GonPARK, Eun-DuckHONG, Mi-Jeung
    • KIM, Jong-HunWOO, Boo-GonPARK, Eun-DuckHONG, Mi-Jeung
    • E21B17/042
    • C08G64/307Y10T428/31504Y10T428/31507
    • The present invention relates to a process for preparing high molecular weight polycarbonate resin, particularly to a process for preparing high molecular weight polycarbonate resin, which conducts condensation polymerization of low molecular weight amorphous polycarbonate prepolymer prepared by transesterification of dialkyl(aryl)carbonate and aromatic hydroxy compound and solid state polymerization within short time to increase molecular weight. The present invention introduces condensation polymerization to lower mole fractions of arylcarbonate existing in unreacted diarylcarboante, end groups of reaction by products of polymerization degree less than 3, and polycarbonate prepolymer obtained by transesterification, and thus can maximize molecular weight increase of polycarbonate after solid state polymerization and remarkably reduce time required for preparing polycarbonate of the same molecular weight. In addition, since the present invention does not use toxic substance phosgene, it has no danger and it can prevent deterioration, and it can prepare high molecular weigh polycarbonate that can be used for injection and extrusion.
    • 本发明涉及一种制备高分子量聚碳酸酯树脂的方法,特别涉及一种制备高分子量聚碳酸酯树脂的方法,该方法进行低分子量无定形聚碳酸酯预聚物的缩聚,其通过二烷基(芳基)碳酸酯和芳族羟基 化合物和固态聚合在短时间内增加分子量。 本发明将存在于未反应的二芳基羧酸酯中的芳基碳酸酯的摩尔比低,聚合度小于3的产物的反应端基和通过酯交换反应得到的聚碳酸酯预聚物进行缩聚,从而可以使固态聚合后的聚碳酸酯的分子量增加最大化 并且显着地减少了制备相同分子量的聚碳酸酯所需的时间。 此外,由于本发明不使用有毒物质光气,因此没有危险,可以防止劣化,并且可以制备可用于注射和挤出的高分子量聚碳酸酯。
    • 9. 发明申请
    • METHOD OF PRODUCING UNSATURATED ACID IN FIXED-BED CATALYTIC PARTIAL OXIDATION REACTOR WITH HIGH EFFICIENCY
    • 固定床催化部分氧化反应器高效生产不饱和酸的方法
    • WO2007007979A1
    • 2007-01-18
    • PCT/KR2006/002651
    • 2006-07-07
    • LG CHEM, LTD.
    • HA, Kyoung-SuWOO, Boo-GonKO, Jun-SeokKANG, Seong-PilCHOI, Seok-HwanKIM, Young-Bae
    • C07C45/27
    • C07C45/34B01J8/0453B01J8/0457B01J8/067B01J2208/00212B01J2208/0053B01J2208/025B01J2219/0004C07C45/35C07C45/36C07C45/37C07C51/215C07C51/252C07C47/21C07C47/22C07C57/04
    • Disclosed is a process for producing unsaturated aldehydes and/or unsaturated acids from olefins or alkanes in a fixed bed shell-and-tube heat exchanger-type reactor by catalytic vapor phase oxidation. A heat exchanger-type reactor for use in such a process is also disclosed. In the process, at least one of the first-step reaction zone and the second-step reaction zone is divided into two or more shell spaces by at least one partition; each of the divided shell spaces is independently heat-controlled; a heat transfer medium in the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone has a temperature ranging from the lowest active temperature of a catalyst layer packed in a reaction tube corresponding to the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone to [the lowest active temperature + 20 °C], when referring to the two or more shell spaces corresponding to the first-step reaction zone sequentially as the first shell space of the first-step reaction zone, the second shell space of the first-step reaction zone, ..., the n th shell space of the first-step reaction zone, and the two or more shell spaces corresponding to the second-step reaction zone sequentially as the first shell space of the second-step reaction zone, the second shell space of the second-step reaction zone, ... , the n th shell space of the second-step reaction zone; and the first shell space of the first-step reaction zone or the first shell space of the second-step reaction zone is controlled in such a manner that the first shell space provides a reactant conversion contribution per length as defined in Equation 1 or 2 of 1.2∼2.5.
    • 公开了一种通过催化气相氧化在固定床管壳式热交换器型反应器中由烯烃或烷烃生产不饱和醛和/或不饱和酸的方法。 还公开了一种用于这种方法的热交换器型反应器。 在该过程中,至少一个第一步骤反应区和第二步反应区被至少一个隔板分成两个或多个壳层空间; 每个分开的壳空间是独立的热控制的; 在第一步骤反应区的第一壳体空间或第二阶段反应区的第一壳体空间中的传热介质的温度范围从填充在对应于第一步骤的反应管的反应管中的催化剂层的最低活性温度 当第二步反应区的第一阶段反应区的壳层空间或第二阶段反应区的第一壳空间为最低活性温度+ 20℃时, 依次作为第一步反应区的第一壳空间,第一步反应区的第二壳空间,第一步反应区的第n个第二壳空间, 和对应于第二步反应区的两个或多个壳层空间依次作为第二步反应区的第一壳空间,第二步反应区的第二壳空间, 第二步反应区的壳层空间; 并且以这样的方式控制第一步骤反应区或第二阶段反应区的第一壳层空间的第一壳层空间,使得第一壳空间提供如式1或2中定义的每个长度的反应物转化贡献 1.2〜2.5。
    • 10. 发明申请
    • METHOD OF PRODUCING UNSATURATED ACID FROM OLEFIN
    • 从烯烃生产不饱和酸的方法
    • WO2006098601A1
    • 2006-09-21
    • PCT/KR2006/000979
    • 2006-03-17
    • LG CHEM, LTD.
    • WOO, Boo-GonKO, Jun-SeokHA, Kyoung-SuKANG, Seong-PilCHOI, Seok-HwanKIM, Young-Bae
    • C07C51/16
    • B01J8/067B01J2208/00212B01J2208/025C07C51/215C07C51/252C07C57/04
    • Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5∼ 30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.
    • 公开了一种壳管式热交换器型反应器,其可用于通过固定床催化部分氧化由烯烃生产不饱和酸的方法,其包括至少一个反应管,每个反应管包含至少一个第一步催化剂 层,其中烯烃被第一步催化剂氧化以主要产生不饱和醛,以及至少两个第二阶段催化剂层,其中不饱和醛被第二步催化剂氧化以产生不饱和酸,其中第一 与第一级催化剂层相邻设置的第二级催化剂层的催化剂层的活性相对于第二级催化剂层中具有最高活性的催化剂层的活性的5〜30%的活性。 还公开了通过使用反应器由烯烃生产不饱和酸的方法。