Modified bitumen composition and process of preparation thereof

Patent metadata

Field	Value
Publication number	US-12584018-B2
Application number	US-202118027317-A
Country	US
Kind code	B2
Filing date	Aug 2, 2021
Priority date	Oct 29, 2020
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The present disclosure relates to a modified bitumen composition comprising: (a) at least two refinery residues; and (b) a sulphur additive comprising: (i) sulphur; (ii) at least one H 2 S suppressant; (iii) at least one smell masking agent; and (iv) bitumen, wherein the sulphur and the at least one H 2 S suppressant is in the weight ratio range of 4:1 to 100:1. The present disclosure also discloses a process of preparing a modified bitumen composition and a process of preparing an asphalt pavement comprising a modified bitumen composition. Also provided herein use of a modified bitumen composition as an additive for waterproofing and road construction.

First claim

We claim:

1 . A modified bitumen composition comprising:
(a) at least two refinery residues;
wherein the at least two refinery residues are selected from the group consisting of propane de-asphalted (PDA) pitch, vacuum tower bottom (VTB), flux, low viscous extract, and vacuum gas oils; and,
(b) a sulphur additive, wherein the sulphur additive comprises:
(i) sulphur;
(ii) at least one H 2 S suppressant;
wherein the at least one H 2 S suppressant is selected from the group consisting of FCC refinery spent catalyst, HDS refinery spent catalyst, DHDS refinery spent catalyst, Fe(acac) 3 , Fe(EHA) 3 , FeCl 3 , calcium oxide, calcium carbonate, bentonite clay, wood charcoal, and combinations thereof; and
(iii) at least one smell masking agent;
wherein the at least one smell masking agent is selected from the group consisting of eugenol, linalool, geraniol, vanillin, iso-amyl ester, phenyl amyl ester, limonene, cinnamaldehyde, and combinations thereof,
And,
(iv) bitumen,
wherein the sulphur and the at least one H 2 S suppressant are in a weight ratio range of 4:1 to 100:1.

2 . The composition as claimed in claim 1 , wherein the sulphur additive is in a range of 2-15 wt % with respect to the composition.

3 . The composition as claimed in claim 1 , wherein the composition further comprises at least one filler, wherein the filler is polyphosphoric acid or phosphorous pentoxide, and the filler is in a range of 0-1 wt % with respect to the composition.

4 . The composition as claimed in claim 1 , wherein the sulphur is in a range of 90-95 wt % with respect to the additive, the at least one H 2 S suppressant is in the range of 1.9-7 wt % with respect to the sulphur additive, the at least one smell masking agent is in a range of 0.04-0.5 wt % with respect to the sulphur additive, and the bitumen is in a range of 0.5-3 wt % with respect to the sulphur additive.

5 . The modified bitumen composition of claim 1 further comprising:
(a) propane de-asphalted (PDA) pitch in a range of 70-90 wt. % with respect to the composition;
(b) vacuum tower bottom (VTB) in a range of 0-17 wt. % with respect to the composition;
(c) flux in a range of 5-15 wt. % with respect to the composition;
(d) a sulphur additive comprising sulphur in a range of 90-95 wt. % with respect to the sulphur additive, at least one H 2 S suppressant in a range of 1.9-7 wt. % with respect to the sulphur additive, at least one smell masking agent a range of 0.04-0.5 wt. % with respect to the sulphur additive, and bitumen in a range of 0.5-3 wt. % with respect to the sulphur additive.

6 . A sulphur additive comprising:
(a) sulphur; (b) at least one H 2 S suppressant;
wherein the at least one H 2 S suppressant is selected from the group consisting of FCC refinery spent catalyst, HDS refinery spent catalyst, DHDS refinery spent catalyst, Fe(acac) 3 , Fe(EHA) 3 , FeCl 3 , calcium oxide, calcium carbonate, bentonite clay, wood charcoal, and combinations thereof; and,
(b) at least one smell masking agent;
wherein the at least one smell masking agent is selected from the group consisting of eugenol, linalool, geraniol, vanillin, iso-amyl ester, phenyl amyl ester, limonene, cinnamaldehyde, and combinations thereof,
and (c) bitumen,
wherein the sulphur and the at least one H 2 S suppressant are in a weight ratio range of 4:1 to 100:1.

7 . The additive as claimed in claim 6 , wherein the sulphur is a range of 90-95 wt % with respect to the sulphur additive, the at least one H 2 S suppressant is in a range of 1.9-7 wt % with respect to the sulphur additive, the at least one smell masking agent is in a range of 0.04-0.5 wt % with respect to the sulphur additive, and the bitumen is in a range of 0.5-3 wt % with respect to the sulphur additive.

8 . The modified bitumen composition as claimed in claim 5 , further comprising at least one filler.

Assignees

• Hindustan Petroleum Corp Ltd

Inventors

• Doni Eswararao
• Chinthalapati Siva Kesava Raju
• Kanala Raghava Krishna
• Balasubramaniam Ravi

Classifications

• E01C19/46

  for preparing and placing the materials {, e.g. slurry seals}({E01C19/002, } E01C19/45, {E01C21/00, E01C23/065} take precedence) · CPC title

• E01C7/267

  with sulfur · CPC title

• C08L2555/54

  Sulfur or carbon black · CPC title

• C08L2310/00

  Masterbatches · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title