GLASS WASHING COMPOUND AND PROCESS

• US 3,607,764 A
• Filed: 01/31/1968
• Issued: 09/21/1971
• Est. Priority Date: 01/31/1968
• Status: Expired due to Term

• Current Assignee: Homer E. Crotty, Michael T. Zalzal
• Original Assignee: Homer E. Crotty, Michael T. Zalzal
• Inventors: Crotty, Homer E., Zalzal, Michael T.
• Primary Examiner(s): Weinblatt, Mayer
• Assistant Examiner(s): Rady, Arnold J.
• Application Number:
  US04/701,829
• Time in Patent Office: 1,329 Days
• Field of Search: 282/135,156,139,158
• US Class Current: 510/174
• CPC Class Codes: C11D 1/72 Ethers of polyoxyalkylene glycols
• CPC Class Codes: C11D 3/044 Hydroxides or bases
• CPC Class Codes: C11D 3/06 Phosphates, including polyphosphates
• CPC Class Codes: C11D 3/2086 Hydroxy carboxylic acids-salts thereof

Abstract

Glassware is washed with an aqueous solution of a washing compound comprising from 25 to 75 parts alkali metal hydroxide, 5 to 25 parts alkali metal tripolyphosphate, 5 to 25 parts tetraalkali metal pyrophosphate, 5 to 25 parts of a hydroxy carboxylic acid sequesterant, from 5 to 20 parts of a glycol ether, from 0.2 to 10 parts of a nonionic polyalkoxylated surfactant, and from 0 to 25 parts of sodium carbonate. By this process, all types of typical soils found on laboratory glassware as well as permanent marking inks used in the pharmaceutical industry are removed.

Claims

2. The composition of claim 1 which consists of:

a. from 45 to 55 parts by weight of the hydroxide;

b. from 5 to 15 parts by weight of the tripolyphosphate;

c. from 5 to 15 parts by weight of the pyrophosphate;

d. from 5 to 15 parts by weight of the hydroxycarboxylic acid sequesterant;

e. from 5 to 15 parts by weight of the alkylene glycol alkyl ether;

f. from 0.2 to 10 parts by weight of the water soluble nonionic surfactant; and

g. from 0 to 25 parts by weight of sodium carbonate.

3. The composition of claim 1 which consists of:

a. from 53 to 55 parts by weight of sodium hydroxide;

b. from 8 to 10 parts by weight of sodium tripolyphosphate;

c. from 8 to 10 parts by weight of tetrasodium pyrophosphate;

d. from 8 to 10 parts by weight of sodium gluconate;

e. from 5 to 8 parts by weight of ethylene glycol monobutyl ether;

f. from 1 to 3 parts by weight of water soluble nonionic surfactant; and

g. from 0 to 25 parts by weight of sodium carbonate.

4. An aqueous solution containing from 1 to 5 weight percent of the composition of claim 1.