# US 4,391,880 A · Recovery of heat and vaporized material from a reaction effluent

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- Number: US 4,391,880 A
- Document ID: US4391880A
- Status: Granted
- Kind: A
- Application number: 06/222,081
- Filed: 1981-01-02
- Granted: 1983-07-05
- Earliest claimed: 1978-01-18
- Assignees: The Lummus Company
- Inventors: Utah Tsao
- Web page: https://patentgrep.com/patent/US4391880A

## CPC

- B01D 5/0003: {by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium}
- B01D 5/009: {Collecting, removing and/or treatment of the condensate}
- C07C 17/38: Separation; Purification; Stabilisation; Use of additives
- Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
- Y10S 423/13: Catalyst contact
- Y10S 502/523: Miscellaneous specific techniques of general applicability
- 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)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Process and system for cooling a reaction effluent containing volatized catalyst wherein the effluent is contacted with circulating cooled solid catalyst in dilute phase transport contact, with the volatized catalyst being condensed onto the solid catalyst.

## Claims

### Claim 1

A process for cooling a gaseous reaction effluent containing volatized catalyst and withdrawn from a reaction system employing a solid catalyst, comprising:
contacting the gaseous reaction effluent with solid catalyst particles by suspending the solid catalyst particles in flowing gaseous reaction effluent to provide dilute phase transport contact, said solid catalyst particles being at a temperature at which vaporized catalyst condenses from the gas onto the solid catalyst particles, said solid catalyst particles being heated and said gaseous reaction effluent being cooled by said contact;
separating gaseous reaction effluent from the solid catalyst particles;
cooling separated solid catalyst particles in a fluidized bed, said fluidized bed being fluidized by a fluidizing gas, said particles being cooled in the fluidized bed to a temperature at which vaporized salt condenses onto the solid particles, said fluidizing gas being a feed gas to the reaction system and being introduced into the reaction system subsequent to use thereof as the fluidizing gas; and
employing cooled solid catalyst particles for contacting the gaseous reaction effluent.

### Claim 2 (depends on 1)

The process of claim 1 wherein the solid catalyst particles are cooled in the fluidized bed by indirect heat transfer.

### Claim 3 (depends on 2)

The process of claim 2 wherein the reaction system is a system for producing a nitrile.

### Claim 4 (depends on 1)

The process of claim 1 wherein the gaseous reaction effluent includes solid catalyst particles and a portion of the separated solid catalyst particles are returned to the reaction system to maintain a level of solid catalyst particles in the fluidized bed.