Abstract: A shell-and tube reactor including at least one reaction tube with a measuring means, substantially same solid particles being filled in the reaction tubes with or without the measuring means, a length of the filled solid particle layer, and a pressure drop thereof while passing a gas through the reaction tube, per each reaction tube, being substantially the same, respectively. By measuring the temperature of the catalyst particle layer, such a temperature as a representative can be gasped.

Abstract: A shell-and tube reactor including at least one reaction tube with a measuring means, substantially same solid particles being filled in the reaction tubes with or without the measuring means, a length of the filled solid particle layer, and a pressure drop thereof while passing a gas through the reaction tube, per each reaction tube, being substantially the same, respectively. By measuring the temperature of the catalyst particle layer, such a temperature as a representative can be gasped.

Abstract: The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stably operate the column treatment. Solid impurities in a treating fluid can be removed by carrying out: step (a) of drawing out the treating fluid from a drawing out outlet (16) at the column bottom of the treatment column (10) outside the treatment column (10), step (b) of removing solid impurities from the treating fluid, drawn out in step (a), by a strainer (40), and step (c) of returning the treating fluid, from which the solid impurities are removed in step (b), to a returning inlet (18) of the treatment column, with advancing physical and/or chemical treatment of the treating fluid in the treatment column (10).

Abstract: A shell-and tube reactor including at least one reaction tube with a measuring means, substantially same solid particles being filled in the reaction tubes with or without the measuring means, a length of the filled solid particle layer, and a pressure drop thereof while passing a gas through the reaction tube, per each reaction tube, being substantially the same, respectively. By measuring the temperature of the catalyst particle layer, such a temperature as a representative can be gasped.

Abstract: The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stably operate the column treatment. Solid impurities in a treating fluid can be removed by carrying out: step (a) of drawing out the treating fluid from a drawing out outlet (16) at the column bottom of the treatment column (10) outside the treatment column (10), step (b) of removing solid impurities from the treating fluid, drawn out in step (a), by a strainer (40), and step (c) of returning the treating fluid, from which the solid impurities are removed in step (b), to a returning inlet (18) of the treatment column, with advancing physical and/or chemical treatment of the treating fluid in the treatment column (10).

Abstract: A solid substance removing device comprising a body provided with a fluid inlet pipe and a fluid outlet pipe and a filtering part disposed between the fluid inlet pipe and the fluid outlet pipe inside said body, the filtering part having (a) a thickness in the range of 5-500 mm, (b) a percentage of voids in the range of 60-99.5 vol. %, and (c) a contact surface area in the range of 100-2000 m2/m3. Owing to the construction described above, it is made possible to facilitate removal of the solid substance and, at the same time, prevent new generation of a polymer during the production of an easily polymerizing substance.

Abstract: A solid substance removing device comprising a body provided with a fluid inlet pipe and a fluid outlet pipe and a filtering part disposed between the fluid inlet pipe and the fluid outlet pipe inside said body, the filtering part having (a) a thickness in the range of 5-500 mm, (b) a percentage of voids in the range of 60-99.5 vol. %, and (c) a contact surface area in the range of 100-2000 m2/m3. Owing to the construction described above, it is made possible to facilitate removal of the solid substance and, at the same time, prevent new generation of a polymer during the production of an easily polymerizing substance.