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Secondary alcohol additives for lithium bromide-water absorption refrigeration system

Assignee: American Gas Association Inc
•
Filing: 1968-02-01
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Granted: 1971-09-28
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Expires: 1988-02-01
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Abstract

Abstract A refrigerant-absorbent solution as a working fluid for use in absorption refrigeration systems that produces a substantial increase in the overall capacity of the refrigeration machine by improving the heat transfer in the absorber, by promoting dropwise condensation of the refrigerant vapor on the exterior surfaces of the condenser tubes and by improving purging of relatively noncondensible gases of the absorption machine. The working fluid comprises water as the refrigerant in combination with lithium bromide as the absorbent to which is added additives such as 4-heptanol, decyl alcohol, 2-phenoxyethanol, nonanol, 3methyl-2-heptanone, methyl octanoate, 3-methyl-2-heptanol, 1heptanol, 1-octanol, 2-hexanol, 2-octanol, 2-methyl-2-hexanol, 2methyl-2-heptanol, 6-methyl-2-heptanol, and 2-heptanol. These additives are supplied to the lithium bromide-water fluid in the range of 50 to 1,000 parts per million on a weight basis of the lithium bromide-water solution.

Inventors

  • 👤 Chang W Chi
  • 👤 Robert A Macriss
  • 👤 William F Rush

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 10:06
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 19 words
A working fluid as in claim 1 wherein said additives are 2-octanol, 2-methyl-2-hexanol, 2-methyl-2-heptanol, 6-methyl-2-heptanol, 2-heptanol, and mixtures thereof.
Claim 2
Dependent Claim 12 words
A working solution as in claim 1 wherein said additive is 2-heptanol.
Claim 3
Dependent Claim 27 words
A working solution as in claim 3 wherein said 2-heptanol is present in said aqueous solution of lithium bromide in a range of 50-1000 p.p.m. by weight.
Claim 4
Dependent Claim 28 words
A working solution as in claim 4 wherein said 2-heptanol is present in said aqueous solution of lithium bromide in an amount of about 400 p.p.m. by weight.

References Cited (Backward Citations)

US3276217A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-09-27 1975-03-29 1975-09-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-09-27 1979-03-29 1979-09-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-09-27 1983-03-29 1983-09-28 $7700.00 Window Closed / Lapsed

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