Method for unclogging drainage pipes

• US 4,610,800 A
• Filed: 01/25/1985
• Issued: 09/09/1986
• Est. Priority Date: 01/25/1985
• Status: Expired due to Fees

• Current Assignee: Enzon Labs Inc.
• Original Assignee: Genex Corp.
• Inventors: Fodge, Douglas W., Glick, J. Leslie, Swann, Wayne E., Durham, Donald
• Primary Examiner(s): Willis, Prince E.
• Application Number:
  US06/695,219
• Time in Patent Office: 592 Days
• Field of Search: 252/174.12, 252/DIG. 12, 252/174.17, 252/173, 435/264
• US Class Current: 435/264
• CPC Class Codes: C11D 2111/20 Industrial or commercial equipment, e.g. reactors, tubes or engines
• CPC Class Codes: C11D 3/222 Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• CPC Class Codes: C11D 3/38645 containing cellulase

Abstract

Drainage pipes, such as toilet drains, which are clogged with cellulosic paper products, are unclogged by contacting the paper with a cellulase enzyme in the form of an aqueous solution, a viscous fluid comprising the enzyme dispersed in a non-cellulosic water-soluble natural or synthetic gum, or solid particles comprising the enzyme dispersed in a water-soluble polymer.

Claims

1. A method for unclogging drainage pipes blocked by cellulosic paper materials which comprises contacting the paper with a thickened fluid composition comprising from about 5% to about 20% by weight of a cellulase enzyme and from about 0.1% to about 1.0% of a non-cellulosic, water-soluble gum at a pH of 4.5 to 8.5, the cellulase enzyme being present in an amount sufficient to digest the cellulose in the paper.

2. A method as claimed in claim 1, wherein said non-cellulosic, water-soluble natural or synthetic gum is selected from the group consisting of xanthan gum, gum arabic, tragacanth gum, locust bean gum, guar gum, carrageenan, pectin, dextran, propyleneglycol alginate, carboxymethyl locust bean gum, carboxymethyl guar gum, fluid ethylene oxide polymers and polyethyleneimine.