US4056430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preventing formation of resinous deposits in the manufacture of paper and the like, and compositions
Assignee: BK Giulini Chemie GmbH
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Filing: 1975-02-21
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Granted: 1977-11-01
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Expires: 1995-02-21
Abstract
Abstract The difficulties encountered in the manufacture of paper, cardboard, and other cellulosic articles, as they are caused by the formation of resinous or pitch deposits on the paper as well as on the paper machines and processing apparatus, are overcome, or at least considerably reduced, by the addition of phosphonic acids and more particularly of alkyl, amino or hydroxy alkyl, or cycloalkyl phosphonic acids or their alkali metal salts. If required, amino polycarboxylic acids, hydroxy carboxylic acids, or their alkali metal salts, or alkali metal polyphosphates are also added during processing.
Inventors
- 👤 Ernst Hoeger
- 👤 Franz Baskovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:40
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/08; D21C9/086; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/10; D21H21/00; D21H21/02; Y; Y10; Y10S; Y10S162/00; Y10S162/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
79 words
In a process of preventing formation of resinous deposits and overcoming pitch trouble from a resin-containing cellulosic starting material in the manufacture of paper, cardboard, boxboard and the like, said process comprising adding to the resin-containing cellulosic starting material during processing water-soluble additive consisting essentially of a phosphonic acid compound selected from an alkylene amino phosphonic acid or an alkali metal or ammonium salt thereof in an amount between about 0.02 and about 1.0%, calculated for dry cellulosic material.
Claim 2
Dependent Claim
79 words
In a process of preventing formation of resinous deposits and overcoming pitch trouble from a resin-containing cellulosic starting material in the manufacture of paper, cardboard, boxboard and the like, said process comprising adding to the resin-containing cellulosic starting material during processing water-soluble additive consisting essentially of a phosphonic acid compound selected from an alkylene amino phosphonic acid or an alkali metal or ammonium salt thereof in an amount between about 0.02 and about 1.0%, calculated for dry cellulosic material.
Claim 3
Dependent Claim
51 words
The process of claim 1, wherein said additive further comprises a carboxylic acid compound selected from the group consisting of amino polycarboxylic acids, hydroxy carboxylic acids, and their alkali metal salts, the ratio of said alkylene amino phosphonic acid compound and said carboxylic acid compound being between about 1:10 and 10:1.
Claim 4
Dependent Claim
23 words
The process of claim 2, wherein said water soluble additive consists of said alkylene amino phosphonic acid compound and said carboxylic acid compound.
Claim 5
Dependent Claim
20 words
The process of claim 2, wherein a portion of said carboxylic acid compound is replaced by an alkali metal polyphosphate.
Claim 6
Dependent Claim
36 words
The process of claim 2, wherein said carboxylic acid compound is selected from the group consisting of gluconic acid, citric acid, tartaric acid, lactic acid, ethylene diamino tetra-acetic acid, diethylene triamino penta-acetic acid, and nitrilo-tri-acetic acid.
Claim 7
Dependent Claim
32 words
The process of claim 2, in which the agent preventing formation of resinous deposits during processing is a mixture of diethylene tri-amino penta-methylene phosphonic acid, diethylene triamino penta-acetic acid, and gluconic acid.
Claim 8
Dependent Claim
18 words
The process of claim 6, in which the alkali metal salts of said mixture of acids are added.
Claim 9
Dependent Claim
19 words
The process according to claim 1, in which the amount of additive is between about 0.04 and about 0.3%.
Claim 10
Dependent Claim
18 words
The process of claim 1, in which the amount of additive is between about 0.04 and about 0.3%.
Claim 11
Dependent Claim
34 words
The process of claim 1, wherein said additive further comprises an alkali metal polyphosphate, the ratio of said alkylene amino phosphonic acid compound and said alkali metal polyphosphate being between about 1:10 and 10:1.
Claim 12
Dependent Claim
27 words
The process of claim 10, wherein said water soluble additive consists of said alkylene amino phosphonic acid compound said carboxylic acid compound and said alkali metal polyphosphate.
Claim 13
Dependent Claim
28 words
The process of claim 10, wherein said polyphosphate is of the formula H n+2 P n O 3n+1 wherein n is a number between 2 and about 60.
Claim 14
Dependent Claim
25 words
The process of claim 12, wherein said alkali metal polyphosphate has the formula Me 10 P 8 O 25 where Me is an alkali metal.
Claim 15
Dependent Claim
25 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is an alkali metal salt of said phosphonic acids.
Claim 16
Dependent Claim
22 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is diethylene triamino pentamethylene phosphonic acid.
Claim 17
Dependent Claim
22 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is ethylene diamino tetra-methylene phosphonic acid.
Claim 18
Dependent Claim
26 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is phosphono butane tri-carboxylic acid or its alkali metal salts.
Claim 19
Dependent Claim
26 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is N-phosphono methylene-1-amino methane-1,1-diphosphonic acid or its alkali metal salts.
Claim 20
Dependent Claim
34 words
The process of claim 1, in which the agent preventing formation of resinous deposits during processing is a mixture of an alkali metal salt of N-phosphono methylene-1-amino methane-1,1-diphosphonic acid and an alkali metal polyphosphate.
Claim 21
Dependent Claim
73 words
The process of claim 1, wherein said alkylene amino phosphonic acid compound is selected from the group consisting of amino methane diphosphonic acid, amino tris-methylene phosphonic acid, diethylene triamino penta-methylene phosphonic acid, propylene diamino tetra-methylene phosphonic acid, ethylene diamino tetra-methylene phosphonic acid, 1,2-cyclohexane diamino tetra-methylene phosphonic acid, 1-amino methyl cyclopentyl amino(2)-tetra-methylene phosphonic acid, N-phosphon o methane-1-amino ethane-1,1-diphosphonic acid, 1-amino ethane-1,1-diphosphonic acid, acetamidin o ethane diphosphonic acid, and bis-N-carboxy methane amino ethane diphosphonic acid.
Claim 22
Dependent Claim
28 words
The process of claim 1, wherein said amino alkylene phosphonic acid is nitrilo trismethylene phosphonic acid, ethylene diamino-tetra-methylene phosphonic acid, diethylene triamino penta-methylene phosphonic acid or N-dicarboxymethylene-1-aminoethane-1,1-diphosphonic acid.
Claim 23
Dependent Claim
18 words
The process of claim 1, wherein said water soluble additive consists of said alkylene amino phosphonic acid compound.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |