摘要:
An electrolysis of sodium chloride is carried out by using a cation exchange membrane obtained by the following treatment.The cation exchange membrane is prepared by treating one surface of a membrane of a perfluorocarbon polymer having sulfonyl halide groups with a diamine or a polyamine at a temperature of 170.degree. C. to a deterioration temperature of the membrane and immersing a diene derivative having a carboxyl group or a group which can be converted to carboxyl group into the membrane to polymerize the diene derivative and treating the membrane with a water miscible organic solvent having a boiling point of higher than 120.degree. C. in 760 mmHg between smooth plates at 80.degree. C. to 180.degree. C.
摘要:
A cation exchange membrane manufacturing method in which a film of a blend which consists of a perfluoro carbon polymer having a group transformable into a sulfonic acid group and a perfluoro carbon polymer having a group transformable into a carboxylic acid group or a film of a copolymer which consists of a perfluoro carbon monomer having a group transformable into a sulfonic acid group and a perfluoro carbon monomer having a group transformable into a carboxylic acid group and another film of a perfluoro carbon polymer having a group transformable into a carboxylic acid group are joined together. Following that, the group transformable into a carboxylic acid group and the group transformable into a sulfonic acid group are transformed respectively into the carboxylic acid group and the sulfonic acid group.
摘要:
An improved method for electrolyzing alkali metal halide. Electrolysis is carried out by supplying an aqueous solution of a halide of alkali metal into an anode chamber partitioned by a cation-exchange membrane and water into a cathode chamber to obtain halogen from the anode chamber and hydrogen and alkali hydroxide from the cathode chamber. The cation-exchange membrane is a fluorocarbon polymer membrane which is prepared by arranging one side thereof to have a cation exchange group concentration lower by 10 to 30% within a depth range of 1 to 100.mu. than that of the other side. The anode chamber is prepared with this side of the membrane which has the lower cation exchange group concentration arranged to face the anode chamber. By this arrangement, a high purity alkali hydroxide can be manufactured at a high rate of decomposition of halide of alkali metal and at a high current efficiency.
摘要:
An alkali metal hydroxide and hydrogen in a cathode compartment and chlorine in an anode compartment by feeding an aqueous solution of an alkali metal chloride in said anode compartment which is partitioned from said cathode compartment with a cation exchange membrane made of a fluorinated polymer is produced under a condition that a temperature of said anode compartment is kept at lower than a temperature of said cathode compartment in said electrolysis.
摘要:
A cation-exchange membrane for electrolyzing an aqueous solution of an alkali metal halide in the manufacture of an alkali hydroxide and a halogen. The membrane comprises one layer which occupies 5 to 30% of the total thickness of the membrane and has carboxylic acid groups; another layer which occupies 5 to 30% of the membrane thickness and has weakly acidic groups, the weakly acidic groups occupying 10 to 60% of the total exchange group capacity of the layer; and a further layer which has sulfonic acid groups occupying the middle portion of the membrane.
摘要:
A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.
摘要:
A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.
摘要:
The present invention provides a storage system and a method of controlling the storage system, in which a second site rapidly resumes system process when a first site is damaged. The storage system comprises a first site including a first storage device, a second site including a second storage device, and a third site including a third storage device, and the method of controlling the storage system comprises a step of making a logical volume of the second storage device consistent with a logical volume of the first storage device by remotely copying only the differential data between the logical volume of the first storage device and the logical volume of the second storage device from a logical volume of the third storage device to the logical volume of the second storage device when the first site is damaged.
摘要:
An information addition system acquires data and a control signal from a hands-free apparatus and a navigation apparatus. The hands-free apparatus is connected to a mobile communication terminal and includes an address-book data storage unit that associates communication-partner information of the mobile communication terminal with name information and stores the associated information in a personal information database as first personal information. The information addition system includes an additional information acquiring unit that acquires date and time information at an outgoing or incoming call from the navigation apparatus as first additional information and that acquires predetermined information at the outgoing or incoming call as second additional information, and an information adding unit that identifies the first personal information in the personal information database on the basis of the communication-partner information and that associates the first and second additional information with the first personal information and stores the associated additional information.
摘要:
When plural copy groups including pairs exist, remote copying for pairs belonging to copy groups is suspended selectively on a copy group-to-copy group basis, instead of suspending remote copying in all the copy groups at once. A computer system has a host computer, plural first storage systems comprising plural first logical disks, and plural second storage systems comprising plural second logical disks. A first logical disk and a second logical disk paired with the first logical disk, and each pair belongs to either a first copy group or a second copy group. To selectively suspend remote copying on a copy group-to-copy group basis, one of the copy groups is specified first and then pairs belonging to this copy group are designated. The first storage systems comprising first logical disks of the designated pairs suspend remote copy processing for the designated pairs.