US 2025/0389083 A1Published application

Digestion accelerator and method for producing pulp using same

AssigneeNicca Chemical Co., Ltd.

InventorsTakashi TANAKA, Toyohiro HARIMOTO

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Abstract

A digestion accelerator includes a specified quaternary ammonium compound, and at least one amine compound selected from the group consisting of a specified primary monoamine, a specified secondary monoamine, and a specified tertiary monoamine. A mass ratio between the quaternary ammonium compound and the amine compound is 5:1 to 10000:1. A method for producing pulp includes a digestion step of adding at least one main agent selected from the group consisting of an alkaline main agent and a sulfite-based main agent, and a digestion accelerator, to digest a material including lignocellulose, in which the digestion accelerator is the above digestion accelerator.

Claims10

Dependent claims

A digestion accelerator comprising:

a quaternary ammonium compound represented by formula (1);
and
at least one amine compound selected from the group consisting of a primary monoamine represented by formula (2), a secondary monoamine represented by formula (3), and a tertiary monoamine represented by formula (4),
wherein, in formula (1),
R1 is an alkyl group having 8 to 22 carbon atoms, a hydroxyalkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, or a hydroxyalkenyl group having 8 to 22 carbon atoms,
R2 is an alkyl group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A1O)nY group,
R3 and R4 are each independently an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, a hydroxyalkenyl group having 2 to 4 carbon atoms, an aryl group, a benzyl group optionally having an alkyl group having 1 to 4 carbon atoms, a phenethyl group optionally having an alkyl group having 1 to 4 carbon atoms, a glycidyl group, or an (A1O)mY group,
N represents a nitrogen atom,
Xp− represents a counterion, and is an inorganic anion or an organic anion, and p represents a valence of an ion,
A1O is an alkyleneoxy group having 2 to 4 carbon atoms, and Y is a hydrogen atom or an acyl group, and
n is an integer of 1 to 15 and m is an integer of 1 to 15;
in formula (2), R5 is an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A2O)kZ group, A2O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and k is an integer of 1 to 6;
in formula (3), R6 and R7 are each independently an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A3O)rZ group, A3O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and r is an integer of 1 to 12;
and
in formula (4), R8 and R9 are each independently an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A4O)tZ group, A4O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and t is an integer of 1 to 12, and
R10 is an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, a hydroxyalkenyl group having 2 to 4 carbon atoms, or an (A5O)uZ group, A5O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and u is an integer of 1 to 12.

13 more elements

A digestion accelerator comprising:

a quaternary ammonium compound represented by formula (1);
and
a sulfur-containing compound that generates a sulfide ion, a polysulfide ion, or a hydrogen sulfide ion in the presence of the quaternary ammonium compound,
wherein, in formula (1),
R1 is an alkyl group having 8 to 22 carbon atoms, a hydroxyalkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, or a hydroxyalkenyl group having 8 to 22 carbon atoms,
R2 is an alkyl group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A1O)nY group,
R3 and R4 are each independently an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, a hydroxyalkenyl group having 2 to 4 carbon atoms, an aryl group, a benzyl group optionally having an alkyl group having 1 to 4 carbon atoms, a phenethyl group optionally having an alkyl group having 1 to 4 carbon atoms, a glycidyl group, or an (A1O)mY group,
N represents a nitrogen atom,
Xp− represents a counterion, and is an inorganic anion or an organic anion, and p represents a valence of an ion,
A1O is an alkyleneoxy group having 2 to 4 carbon atoms, and Y is a hydrogen atom or an acyl group, and
n is an integer of 1 to 15 and m is an integer of 1 to 15.

8 more elements

Dependencies are inferred from the claim text.

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Abstract

A digestion accelerator comprising:

a quaternary ammonium compound represented by formula (1);
and
at least one amine compound selected from the group consisting of a primary monoamine represented by formula (2), a secondary monoamine represented by formula (3), and a tertiary monoamine represented by formula (4),
wherein, in formula (1),
R1 is an alkyl group having 8 to 22 carbon atoms, a hydroxyalkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, or a hydroxyalkenyl group having 8 to 22 carbon atoms,
R2 is an alkyl group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A1O)nY group,
R3 and R4 are each independently an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, a hydroxyalkenyl group having 2 to 4 carbon atoms, an aryl group, a benzyl group optionally having an alkyl group having 1 to 4 carbon atoms, a phenethyl group optionally having an alkyl group having 1 to 4 carbon atoms, a glycidyl group, or an (A1O)mY group,
N represents a nitrogen atom,
Xp− represents a counterion, and is an inorganic anion or an organic anion, and p represents a valence of an ion,
A1O is an alkyleneoxy group having 2 to 4 carbon atoms, and Y is a hydrogen atom or an acyl group, and
n is an integer of 1 to 15 and m is an integer of 1 to 15;
in formula (2), R5 is an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A2O)kZ group, A2O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and k is an integer of 1 to 6;
in formula (3), R6 and R7 are each independently an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A3O)rZ group, A3O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and r is an integer of 1 to 12;
and
in formula (4), R8 and R9 are each independently an alkyl group having 1 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a hydroxyalkyl group having 1 to 22 carbon atoms, a hydroxyalkenyl group having 2 to 22 carbon atoms, or an (A4O)tZ group, A4O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and t is an integer of 1 to 12, and
R10 is an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, a hydroxyalkenyl group having 2 to 4 carbon atoms, or an (A5O)uZ group, A5O is an alkyleneoxy group having 2 to 4 carbon atoms, Z is a hydrogen atom or an acyl group, and u is an integer of 1 to 12.

13 more elements