# US 5,701,762 A · Apparatus for recovering high-boiling point solvents

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- Number: US 5,701,762 A
- Document ID: US5701762A
- Status: Granted
- Kind: A
- Application number: 08/771,160
- Filed: 1996-12-20
- Granted: 1997-12-30
- Earliest claimed: 1995-12-21
- Assignees: Nichias Corporation; Toho Chemical Engineering and Construction Co., Ltd.
- Inventors: Mikio Akamatsu; Kenji Seki; Katsuhiro Yamashita; Takeya Kobayashi; Takashi Taniguchi
- Web page: https://patentgrep.com/patent/US5701762A

## CPC

- B01D 53/06: with moving adsorbents, e.g. rotating beds {(B01D53/025 takes precedence)}
- B01D 2253/3425: Honeycomb shape
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

Apparatus for recovering high-boiling point solvents which comprises: a honeycomb-structured rotor 1 having an adsorbent supported thereon; a separator 3 for partitioning the neighborhood of each end face of the rotor into two regions, adsorption zone 5 and desorption zone 4; fan means F.sub.1 that supplies the adsorption zone 5 with air containing a solvent boiling at 150.degree. to 300.degree. C. and which causes part of the clean gas effluent a from the opposite end face of the rotor to be released into the air atmosphere while the remainder is supplied into the desorption zone 4; heating means H for heating the clean gas; cooling means C for separating a solvent enriched gas S into a liquefied product L to be recovered and a cooled lean gas V; and return means F.sub.2 for turning the cooled lean gas V back to the feed gas.

## Claims

### Claim 1

An apparatus for recovering a high-boiling point solvent comprising:
a rotor comprising, a honeycomb structure having an adsorbent supported thereon, a rotational axis, tubular air passageways extending therethrough parallel to the rotational axis and first and second end faces;
drive means for driving the rotor;
a separator comprising radially arranged plate members provided in a face-to-face relationship with the first and second end faces of the rotor for partitioning the neighborhood of each of the rotor end faces into a adsorption zone and a desorption zone;
fan means for supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to the first end face of the absorption zone, for releasing a part of a clean gas effluent from the second end face of the rotor to an air atmosphere, and for supplying a remainder of the clean gas is supplied into the desorption zone subsequent to the adsorption zone in the direction of the rotation of the rotor;
heating means installed behind the fan means for heating the remainder of the clean gas;
cooling means for separating the solvent enriched gas effluent from the desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas; and
return means for mixing the cooled lean gas with the high-boiling point solvent containing air.

### Claim 2 (depends on 1)

The apparatus for recovering a high-boiling point solvent according to claim 1, further comprising:
means for cooling the high-boiling point solvent to be supplied to the absorption zone.

### Claim 3

An apparatus for recovering a high-boiling point solvent comprising:
a rotor comprising, a honeycomb structure having an adsorbent supported thereon, a rotational axis, tubular air passageways extending therethrough parallel to the rotational axis and first and second end faces;
drive means for driving the rotor;
a separator comprising radially arranged plate members provided in a face-to-face relationship with the first and second end faces of the rotor for partitioning the neighborhood of each of the rotor end faces into a adsorption zone, a desorption zone and a purge zone;
fan means for supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to the first end face of the absorption zone, for releasing a part of a clean gas effluent from the second end face of the rotor to an air atmosphere, and for supplying a remainder of the clean gas is supplied into the purge zone subsequent to the adsorption zone in the direction of the rotation of the rotor;
heating means for heating the remainder of the clean gas fed from the purge zone;
cooling means for separating the solvent enriched gas effluent from the desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas; and
return means for mixing the cooled lean gas with the high-boiling point solvent containing air.

### Claim 4 (depends on 3)

The apparatus for recovering a high-boiling point solvent according to claim 3, further comprising:
means for cooling the high-boiling point solvent to be supplied to the absorption zone.

### Claim 5

A method for recovering a high-boiling point solvent comprising the steps of:
supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to a first end face of a Absorption zone of a rotor;
releasing a part of a clean gas effluent from a second end face of the rotor to an air atmosphere;
supplying a remainder of the clean gas is supplied into a desorption zone subsequent to a adsorption zone in a direction of a rotation of the rotor;
heating the remainder of the clean gas;
separating the solvent enriched gas effluent from the desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas; and
mixing the cooled lean gas with the high-boiling point solvent containing air.

### Claim 6 (depends on 5)

The method for recovering a high-boiling point solvent according to claim 5, further comprising the step of:
cooling the high-boiling point solvent to be supplied to the absorption zone.

### Claim 7

A method for recovering a high-boiling point solvent comprising the steps of:
supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to a first end face of an absorption zone of a rotor;
releasing a part of a clean gas effluent from a second end face of the rotor to an air atmosphere;
supplying a remainder of the clean gas is supplied into a purge zone of the rotor subsequent to the adsorption zone in a direction of the rotation of the rotor;
heating the remainder of the clean gas fed from the purge zone;
separating the solvent enriched gas effluent from a desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas; and
mixing the cooled lean gas with the high-boiling point solvent containing air.

### Claim 8 (depends on 7)

The method for recovering a high-boiling point solvent according to claim 7, further comprising the step of:
cooling the high-boiling point solvent to be supplied to the absorption zone.