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Pitch and stickies control in pulp and papermaking processes

A pulping and anti-sticking agent technology, applied in textiles and papermaking, fat/resin/pitch/wax removal of pulp, papermaking, etc., can solve problems such as paper quality deterioration and productivity loss

Active Publication Date: 2009-09-30
SOLENIS TECH CAYMAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While downtime cleaning of paper machines is possible, such downtime cleaning is undesirable due to the corresponding loss in productivity and the presence of these contaminants and "dirt" when deposits break off and become incorporated into the paper It will also cause deterioration of paper quality

Method used

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  • Pitch and stickies control in pulp and papermaking processes

Examples

Experimental program
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Effect test

Embodiment

[0036] Pitch Deposition Test (PDT)

[0037] The Pitch Deposition Test (PDT) was performed to determine the efficacy of the compositions of the present invention as deposition control agents. In this test, 6 ml of a 25% by weight solution of calcium chloride dihydrate was added to bleached hardwood kraft pulp of 0.5% consistency diluted with DI (deionized) water at a temperature of about 50°C, and 140 ml of a solution preheated to about Synthetic pitch at 50°C. The synthetic resin was prepared according to the following method: 4.0 grams of Wesson brand corn oil (ConAgra Foods, Inc., Omaha, NE, USA) and 1.0 grams of Sylvatol 40 (Arizona Chemical, Jacksonville, FL, USA) were mixed together, This was then charged into 995.0 grams of DI water, warmed to about 50°C, and mixed for 2 minutes with a Silverson L4RT laboratory mixer fitted with an emulsifier screen. After addition of the synthetic resin, an aliquot of the test solution is transferred to a suitable beaker and mixed wit...

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PUM

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Abstract

Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of an enzyme and a nonionic polymeric detackifier are added to the pulp or applied to deposition-prone process equipment surfaces of a pulp and papermaking system.

Description

technical field [0001] The present invention relates to a method of inhibiting the deposition of organic pollutants in pulp and papermaking systems. Background technique [0002] It is well known that during the papermaking process, organic contaminants (ie, resins and stickies) deposited on surfaces are detrimental to product quality and papermaking process efficiency. Certain polluting components occur naturally in wood and are released during various pulping and papermaking processes. Two specific manifestations of this problem are known as resins (mainly natural resins) and stickies (adhesives or coatings from recycled paper). During the above process, resins and stickies can cause deposition, quality and efficiency issues. [0003] The term "pitch" may be used to denote a deposit consisting of organic components, which may be derived from these natural pitches, their salts, as well as coating binders, sizing agents, and defoaming chemicals present in the pulp. In add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/08D21H17/26D21H21/02
CPCD21H21/02D21H17/26D21C5/005D21H17/005D21C9/086D21H17/37D21H17/53
Inventor W·S·卡雷徐祖峰
Owner SOLENIS TECH CAYMAN
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