# US 10,307,707 B2 · 1-amino-2-methyl-2-propanol derivatives

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- Number: US 10,307,707 B2
- Document ID: US10307707B2
- Status: Granted
- Kind: B2
- Application number: 15/981,994
- Filed: 2018-05-17
- Published: 2018-11-22
- Granted: 2019-06-04
- Earliest claimed: 2017-05-17
- Applicants: Thomas P. Daly
- Inventors: Thomas P. Daly
- Web page: https://patentgrep.com/patent/US10307707B2

## CPC

- B01D 53/1493: {Selection of liquid materials for use as absorbents}
- C07C 215/06: and acyclic
- C07C 215/08: with only one hydroxy group and one amino group bound to the carbon skeleton
- C07C 215/10: with one amino group and at least two hydroxy groups bound to the carbon skeleton
- C07C 229/12: to carbon atoms of acyclic carbon skeletons
- C07C 229/22: the carbon skeleton being further substituted by oxygen atoms
- C07C 329/14: Esters of dithiocarbonic acids
- C07C 333/04: having nitrogen atoms of thiocarbamic groups bound to hydrogen atoms or to acyclic carbon atoms
- B01D 2252/20405: Monoamines
- B01D 2252/30: Ionic liquids and zwitter-ions
- C07C 229/24: having more than one carboxyl group bound to the carbon skeleton, e.g. aspartic acid
- C07C 309/14: containing amino groups bound to the carbon skeleton
- C07F 9/3817: {Acids containing the structure (RX)2P(=X)-alk-N...P (X = O, S, Se)}
- C07F 9/48: Phosphonous acids [RP(OH)2] {including [RHP(=O)(OH)]}; Thiophosphonous acids {including [RP(SH)2], [RHP(=S)(SH)]; Derivatives thereof}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

Amines and amine derivatives that improve the buffering range, and/or reduce the chelation and other negative interactions of the buffer and the system to be buffered. The reaction of amines or polyamines with various molecules to form polyamines with differing pKa's extend the buffering range resulting in polyamines that have the same pKa yields a greater buffering capacity. Derivatives that result in zwitterionic buffers improve yield by allowing a greater range of stability.

## Claims

### Claim 1

A mining collector of the following structure:
and salts thereof,
wherein A is chosen from —CS2H or —H.

### Claim 2 (depends on 1)

The mining collector and its salts of claim 1 wherein A=-H.

### Claim 3 (depends on 1)

The mining collector and its salts of claim 1 wherein A=-CS2H.