Stable solid enzyme compositions and methods employing them
First Claim
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1. A method of cleaning a medical or dental instrument, comprising:
- dissolving a solid enzyme cleaning composition in water, the solid enzyme cleaning composition comprising detersive enzyme and a mixture of carbonate and bicarbonate;
the carbonate and bicarbonate being present in a weight ratio of about 0.5;
1 to about 4.75;
1;
contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature wherein said;
the medical or dental instrument comprising forceps, scissor, shear, saw, hemostat, knife, chisel, rongeur, file, nipper, drill, drill bit, rasp, burr, spreader, breaker, clamp, needle holder, carrier, clip, hook, gouge, curette, retractor, straightener, punch, extractor, scoop, keratome, expressor, trocar, dilator, cage, catheter, cannula, plug, stent, arthoscope, or combinations thereof.
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Abstract
The present invention relates to a solid enzyme cleaning composition in which the enzyme is stable in the presence of mixtures of carbonate and bicarbonate at alkaline pH, and methods employing this composition. The enzyme cleaning composition preferably employs weight ratios of carbonate and bicarbonate to stabilize one or more enzymes in a solid, a concentrate, and/or a use composition, and at temperatures higher than ambient.
221 Citations
31 Claims
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1. A method of cleaning a medical or dental instrument, comprising:
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dissolving a solid enzyme cleaning composition in water, the solid enzyme cleaning composition comprising detersive enzyme and a mixture of carbonate and bicarbonate;
the carbonate and bicarbonate being present in a weight ratio of about 0.5;
1 to about 4.75;
1;
contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature wherein said;
the medical or dental instrument comprising forceps, scissor, shear, saw, hemostat, knife, chisel, rongeur, file, nipper, drill, drill bit, rasp, burr, spreader, breaker, clamp, needle holder, carrier, clip, hook, gouge, curette, retractor, straightener, punch, extractor, scoop, keratome, expressor, trocar, dilator, cage, catheter, cannula, plug, stent, arthoscope, or combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 27, 28, 29, 30, 31)
contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature comprises;
presoaking the medical or dental instrument in the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature.
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29. The method of claim 1, wherein:
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contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature comprises;
spraying the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature.
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30. The method of claim 1, wherein:
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contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature comprises;
machine washing the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature.
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31. The method of claim 1, wherein:
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contacting the medical or dental instrument with the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature comprises;
ultrasonic treatment of the medical or dental instrument in the dissolved solid enzyme cleaning composition at a temperature at or above ambient temperature.
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12. A solid enzyme cleaning composition:
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the composition being in the form of pellet, tablet, lozenge, puck, briquette, brick, solid block, or unit dose;
the composition comprising;
detersive enzyme and a mixture of carbonate and bicarbonate;
the carbonate and bicarbonate being present in a weight ratio of about 3.5;
1 to about 4.75;
1;
wherein the ratio of carbonate to bicarbonate is selected to increase stability of the detersive enzyme in the solid composition at ambient temperature. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A liquid concentrate composition comprising:
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about 0.3 to about 4 wt-% water, detersive enzyme, and a mixture of carbonate and bicarbonate;
the carbonate and bicarbonate being present in a weight ratio of about 3.5;
1 to about 4.75;
1.
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24. A solid enzyme cleaning composition comprising:
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plurality of detersive enzymes, the plurality of detersive enzymes comprising;
protease plus;
amylase, lipase, cellulase, peroxidase, gluconase, or a combination thereof; and
a mixture of carbonate and bicarbonate;
the carbonate and bicarbonate being present in a weight ratio of about 3.5;
1 to about 4.75;
1;
wherein the ratio of carbonate to bicarbonate is selected to increase stability of the plurality of detersive enzymes. - View Dependent Claims (25, 26)
alkaline protease plus lipase, amylase, or a combination thereof.
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Specification