PATENT CLAIM ANALYSIS

Application Number: 15763604
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["423", "228000"]

Abstract:
An absorbent for selective removal of hydrogen sulfide from a fluid stream comprises an aqueous solution comprising a) a tertiary amine; b) an aminic pH promoter selected from the compounds mentioned in the description; where the molar ratio of b) to a) is in the range from 0.05 to 1.0; and c) an acid having a pK A  of less than 6 in such an amount that the pH of the aqueous solution measured at 120° C. is 7.9 to less than 8.8. Also described is a process for removing acidic gases from a fluid stream, in which the fluid stream is contacted with the absorbent. The absorbent is notable for a low regeneration energy.

Claim (Index 1):
An absorbent for selective removal of hydrogen sulfide from a fluid stream, the absorbent comprising an aqueous solution comprising:\n a) a tertiary amine of the general formula (I) in which R 1  is a C 2-4 -hydroxyalkyl and R 2  and R 3  are each independently selected from C 1-3 -alkyl and C 2-4 -hydroxyalkyl;\n b) an aminic pH promoter, the aminic pH promoter being selected from the group consisting of: \n compounds of the general formula (II): \n in which\n R 4  is selected from the group consisting of hydrogen; OR 7  in which R 7  is selected from the group consisting of hydrogen and C 1-4 -alkyl; and NR 8 R 9  in which R 8  and R 9  are each independently selected from the group consisting of C 1-5 -alkyl and C 2-5 -hydroxyalkyl or R 8  is hydrogen and R 9  is selected from the group consisting of C 1-5 -alkyl and C 2-5 -hydroxyalkyl; \n R 5  and R 6  are each independently selected from the group consisting of C 1-5 -alkyl and C 2-5 -hydroxyalkyl or R 5  is hydrogen and R 6  is selected from the group consisting of C 1-5 -alkyl and C 2-5 -hydroxyalkyl; \n compounds of the general formula (III): in which\n R 10 , R 11 , R 12  and R 13  are each independently selected from the group consisting of C 1-5 -alkyl, C 1-5 -aminoalkyl, C 2-5 -hydroxyalkyl and (di-C 1-4 -alkylamino)-C 1-5 -alkyl; and \n x is an integer from 2 to 4; \n compounds of the general formula (IV): in which\n R 14  and R 15  are each independently selected from the group consisting of hydrogen, C 1-4 -alkyl and C 1-4 -hydroxyalkyl, with the proviso that the R 14  and R 15  radicals on the carbon atom bonded directly to the nitrogen atom are C 1-4 -alkyl or C 1-4 -hydroxyalkyl; and \n x is an integer from 2 to 4; and \n compounds of the general formula (V): in which R 16 , R 17  and R 18  are each independently selected from C 1-5 -alkyl, C 1-5 -aminoalkyl, C 2-5 -hydroxyalkyl and (di-C 1-4 -alkylamino)-C 1-5 -alkyl; and c) an acid having a pK A  of less than 6 in such an amount that a pH of the aqueous solution measured at 120\u00b0 C. is 7.9 to less than 8.8, wherein a the molar ratio of b) to a) is in the range from 0.05 to 1.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 90.0
- Lexical Diversity: 1.73973
- Patent Class: 423.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15506451', '15506472', '16095970', '15506646', '15764138']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8019335978408895
- 35 USC 102 Novelty (BERT): 0.5293758215747474
- Combined Prediction Score: 0.7746778202142752
- Mean Citation Score: 331.84782
- Max Citation Score: 362.6125
- Similarity Product: 282.50338049381975

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test