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    • 1. 发明授权
    • Liquid filtering and supply system controlling recirculation responsive
to pressure difference across filter
    • 液体过滤和供应系统根据过滤器上的压力差控制再循环
    • US5589077A
    • 1996-12-31
    • US341919
    • 1994-11-16
    • Yoji MatsudaMasao MorikawaMasaaki Toma
    • Yoji MatsudaMasao MorikawaMasaaki Toma
    • B01D29/60B01D37/04B01J4/00
    • B01D29/606Y10S134/902
    • A liquid filtering and supply system according to the present invention comprises, a main line to connect a liquid introducing part to a liquid supplying part, a filter disposed in said main line to filter said liquid, a first pressure detector disposed in said main line at an upstream side of said filter to detect a pressure of said liquid before said liquid is introduced to said filter, a second pressure detector disposed in said main line at a downstream side of said filter to detect a pressure of said liquid after said liquid passed out of said filter, a first circulating line for returning a liquid in said main line to the liquid introducing part, a pressure difference computing element to determine a pressure difference between the first pressure detector and said second pressure detector, a control valve disposed in the first circulating line, and a controlling part to adjust an opening of said control valve, based on a signal of the pressure difference transmitted from the pressure difference computing element.
    • 根据本发明的液体过滤和供给系统包括:将液体引入部分连接到液体供应部分的主线,设置在所述主线中以过滤所述液体的过滤器,设置在所述主管线中的第一压力检测器 所述过滤器的上游侧在所述液体被引入所述过滤器之前检测所述液体的压力;第二压力检测器,其设置在所述主管线的所述过滤器的下游侧,以在所述液体流出之后检测所述液体的压力 的第一循环管线,用于将所述主管线中的液体返回到液体引入部分;压差计算元件,用于确定第一压力检测器和所述第二压力检测器之间的压力差;控制阀,其设置在第一 循环管路,以及控制部分,用于根据从压力传递的压差的信号调节所述控制阀的开度 肯定的差异计算元素。
    • 2. 发明授权
    • Process for purifying phenol
    • 苯酚纯化方法
    • US5334774A
    • 1994-08-02
    • US64982
    • 1993-05-24
    • Kayoko KogureKazuo KimuraMichihiro KawasakiMasaaki TomaEiji Imamura
    • Kayoko KogureKazuo KimuraMichihiro KawasakiMasaaki TomaEiji Imamura
    • C07B61/00C07C7/06C07C15/02C07C37/68C07C37/80C07C37/88C07C39/04C07C37/74
    • C07C37/685C07C37/80C07C37/88Y02P20/582
    • A process for purifying and recovering phenol present in a mixed solution containing phenol and one or more compounds capable of forming azeotropic mixtures with phenol wherein an additive which is at least one compound belonging to the following groups 1 to 5 is added to the mixed solution and the resulting mixture is distilled:group 1: dialkylene glycols having 2-10 carbon atoms, polyalkylene glycols having 2-10 carbon atoms, and the ethers thereof,group 2: alkanediols having 2-20 carbon atoms,group 3: ethanolamine-type compounds represented by the formula (1) shown below,group 4: lactam compounds represented by the formula (2) shown below,group 5: quinoline, sulfolane, and N,N-dimethylimidazolidinone, ##STR1## wherein R.sub.1 represents an alkyl group having 1-6 carbon atoms, a cycloalkyl group having 1-6 carbon atoms, a monohydroxyalkyl group having 1-6 carbon atoms or a hydrogen atom, m represents an integer of 1-4, and X represents a hydroxyl group, an amino group or a hydrogen atom provided that R.sub.1 and X may conjointly represent a group which can be formed by removing respectively one hydrogen atom from R.sub.1 and X, respectively, and connecting the rests of R.sub.1 and X to form a cyclic ring, ##STR2## wherein R.sub.2 represents an alkyl group having 1-6 carbon atoms, a cycloalkyl group having 1-6 carbon atoms, a monohydroxyalkyl group having 1-6 carbon atoms, or a hydrogen atom, and n represents an integer of 3-7.
    • 一种纯化和回收苯酚存在于苯酚和一种或多种与苯酚形成共沸混合物的混合溶液中的苯酚的方法,其中将至少一种属于下列基团1至5的化合物的添加剂加入到混合溶液中, 蒸馏得到的混合物:组1:具有2-10个碳原子的二亚烷基二醇,具有2-10个碳原子的聚亚烷基二醇及其醚,第2组:具有2-20个碳原子的烷二醇,第3组:乙醇胺型化合物 由下式(1)表示的组4:由下式(2)表示的内酰胺化合物,组5:喹啉,环丁砜和N,N-二甲基咪唑烷酮,其中R1表示烷基 具有1-6个碳原子的基团,具有1-6个碳原子的环烷基,具有1-6个碳原子的一羟基烷基或氢原子,m表示1-4的整数,X表示羟基,氨基 组或水平 条件是R1和X可以共同表示可以通过分别从R1和X分别除去一个氢原子并连接其余的R 1和X以形成环状而形成的基团,其中(2)其中 R2表示具有1-6个碳原子的烷基,具有1-6个碳原子的环烷基,具有1-6个碳原子的一羟基烷基或氢原子,n表示3-7的整数。