US 5,284,630 AGranted

Apparatus for production of acetylene

AssigneeUniversity of Utah

InventorsJames W. Bunger, Hoil Ryu, Prasad A. V. Devineni

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Abstract

A two-stage process for producing acetylene and calcium chloride from calcium carbide and water has two successive reaction steps. In step Number 1, calcium carbide is charged into an entrained flow-type reactor vessel containing water. The reaction which follows proceeds to about 60-90% completion. The entrained reaction products and the unreacted feed material are carried over to a secondary reactor to complete the reaction, and the acetylene gas is drawn off. Calcium hydroxide product is removed from the reactor and reacted with hydrogen chloride to form calcium chloride. Heat generated by the exothermic reactions of water with calcium carbide and HCl with calcium hydroxide is used to dry the calcium chloride product and improve its value. In the presence of excess water, the calcium carbide-water reaction is effectively a first order, irreversible reaction.

Claims14

Dependent claims

An apparatus for the production of acetylene which comprises;

(a) an entrained flow primary reactor for reacting particulate calcium carbide with water by contacting the particulate calcium carbide with water in an upward flow of water of sufficient velocity to entrain calcium hydroxide reaction product and partially reacted particles of calcium carbide in the upward flow of water,
(b) means for continuously charging particulate calcium carbide to the primary reactor,
(c) a secondary reactor which provides an essentially plug-flow reaction environment between calcium carbide and water,
(d) means for continuously conveying the calcium hydroxide reaction product and partially reacted particulate calcium carbide entrained in the upward flow of water in the primary reactor to the secondary reactor,
(e) means for conveying acetylene gas from the primary reactor and the secondary reactor, and
(g) means for removing calcium hydroxide from the secondary reactor.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/775,214Filed 11 Oct 1991 · division
Priority: 30 Oct 1989
Granted: 8 Feb 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C10H 3/00
Acetylene gas generators with automatic water feed regulation by means independent of
C01F 11/02
Compounds of calcium, strontium, or barium: oxides or hydroxides
C01F 11/28
Chlorides: by chlorination of alkaline-earth metal compounds
C10H 15/06
Acetylene gas generators with carbide feed, with or without regulation by the gas pressure: with automatic carbide feed by valves