Alkaline-treated inverted molasses as dispersants for mineral suspensions

Patent metadata

Field	Value
Publication number	US-2016347660-A1
Application number	US-201415028604-A
Country	US
Kind code	A1
Filing date	Oct 15, 2014
Priority date	Oct 18, 2013
Publication date	Dec 1, 2016
Grant date	—

Abstract

Modified molasses are used as dispersants for mineral suspensions, the modified molasses being obtained by means of a method comprising the steps: a) inversion of molasses and/or provision of inverted molasses; b) reaction of the inverted molasses with alkalies.

First claim

1 . A method of using modified molasses as dispersants for mineral suspensions, wherein the modified molasses is obtained according to the following steps:
a) inverting molasses and/or providing inverted molasses, and b) reacting the inverted molasses with alkalis.

2 . The method according to claim 1 , wherein the inverting of the molasses in step a) is performed enzymatically with an invertase.

3 . The method according to claim 1 , wherein the alkaline treatment in step b) is performed with a base selected from the group consisting of Ca(OH) 2 , Mg(OH) 2 , NaOH, KOH and mixtures thereof.

4 . The method according to claim 1 , wherein step b) is carried out at a temperature of from 10° C. to 90° C.

5 . The method according to claim 1 , wherein in step b), a temperature of from 30° C. to 80° C., and a pH of from 6 to 14, is maintained for 0.5 to 5 hours.

6 . The method according to claim 1 , wherein the modified molasses is used together with at least one liquefier, and wherein the at least one liquefier has a structure according to formula (I)

wherein
R 1 , independently of one another, represents H or an alkyl group having from 1 to 5 carbon atoms,
R 2 , independently of one another, represents H, —COOM, or an alkyl group having from 1 to 5 carbon atoms,
M, independently of one another, represents an alkali metal ion, an alkaline earth metal ion, a di- or tri-valent metal ion, an ammonium ion, or an organic ammonium group,
X represents —COO—, —NH— or mixtures thereof,
m=0, 1 or 2,
p=0 or 1,
Y, independently of one another, represents H, M, a C 1 - to C 20 -alkyl group, -cycloalkyl group, -alkylaryl group, -hydroxyalkyl group, or a group of the formula -[AO] n — R a , wherein the mentioned groups are unsubstituted or substituted by a sulfone group, a sulfate group or by a phosphate group,

wherein A=C 2 - to C 4 -alkylene, R a represents H, a C 1 - to C 20 -alkyl group, -cyclohexyl group or -alkylaryl group, and n=1-10.

7 . The method according to claim 6 , wherein the at least one liquefier includes a poly(meth)acrylic acid and/or a salt thereof.

8 . The method according to claim 1 , wherein the modified molasses, optionally together with the at least one liquefier, is used in an amount of from 0.01 to 5% by weight, based on the solids content of the mineral suspension.

9 . The method according to claim 1 , wherein the amount by weight of solid particles having a particle size <100 μm in the mineral suspension is at least 50% by weight, and/or the amount by weight of solid particles having a particle size >10 mm in the mineral suspension is less than 10% by weight, based on the total weight of all the solids in the mineral suspension.

10 . The method according to claim 1 ,
wherein the modified molasses, optionally together with the at least one liquefier, is used in an amount of from 0.01 to 5% by weight, based on the solids content of the mineral suspension, and wherein the amount by weight of solid particles having a particle size <100 μm in the mineral suspension is at least 50% by weight, and/or the amount by weight of solid particles having a particle size >10 mm in the mineral suspension is less than 10% by weight, based on the total weight of all the solids in the mineral suspension.

11 . The method according to claim 9 , wherein the modified molasses, optionally together with the at least one liquefier, is used in an amount of from 0.01 to 0.8% by weight based on the total weight of the mineral suspension.

12 . The method according to claim 1 ,
wherein the mineral suspension comprises a mineral binder, and wherein the mineral suspension is a mortar composition or a concrete composition.

13 . A method for producing a mineral suspension, wherein modified molasses, as described in claim 1 , and optionally a liquefier as described in claim 6 is mixed with mineral solid particles and a liquid.

14 . A mineral suspension obtained by the method according to claim 13 .

15 . A molded body obtained by hardening a mineral suspension according to claim 14 , wherein the mineral suspension comprises mineral binder tempered with water.

Assignees

• Sika Tech Ag

Inventors

• Haack Thomas
• Olivares Hugo
• Gallegos Pedro

Classifications

• C12Y302/01026

  Beta-fructofuranosidase (3.2.1.26), i.e. invertase · CPC title

• C04B24/10 Primary

  Carbohydrates or derivatives thereof · CPC title

• C08K5/1535

  Five-membered rings · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title

• C04B24/2641

  Polyacrylates; Polymethacrylates · CPC title