Application of Diethylene Triamine Penta Methylene Phosphonic Acid in Bamboo Pulping

2012 ◽  
Vol 550-553 ◽  
pp. 3331-3334
Author(s):  
Hong Xia Gao
Keyword(s):  
Phosphonic Acid ◽  
Kappa Number ◽  
Diethylene Triamine ◽  
Bamboo Pulp ◽  
Kraft Cooking ◽  
Pulp Properties

The effect of Diethylene Triamine Penta Methylene Phosphonic Acid in bamboo kraft cooking was studied. The results show that the bamboo pulp properties are optimal when DTPMPA dosage is 0.4%. The optimal properties are as follows: the kappa number is 16.4, brightness is 37.8%, and the screened yield is 41.9%.

Application of Chelating Agents as Cooking Aids in Bamboo Pulping

2013 ◽  
Vol 750-752 ◽  
pp. 1520-1523
Author(s):  
Hong Xia Gao ◽  
Wen Hua He ◽  
Xiu Qiong Guan ◽  
Chun Liu ◽  
Bo Yuan
Keyword(s):  
Phosphonic Acid ◽  
Chelating Agents ◽  
Kraft Pulping ◽  
Kappa Number ◽  
Pulp Yield ◽  
Diethylene Triamine ◽  
Bamboo Pulp ◽  
Kraft Cooking ◽  
Pulp Strength

The effect of chelating agents Diethylene Triamine Penta Methylene Phosphonic Acid in bamboo kraft cooking was studied. The results show that the bamboo pulp yield was 49.52% when DTPMPA dosage is 0.4%, at the same time the Kappa number was lower. With the increasing of DTPMPA dosage in bamboo kraft pulping, the bamboo pulp strength was increased.

Study on Bamboo Kraft Pulping with DTPMPA

2013 ◽  
Vol 781-784 ◽  
pp. 2658-2661
Author(s):  
Hong Xia Gao ◽  
Xiu Qiong Guan ◽  
Chun Yue Ding
Keyword(s):  
Phosphonic Acid ◽  
Kraft Pulping ◽  
Kappa Number ◽  
Maximum Temperature ◽  
Pulp Yield ◽  
Waste Liquor ◽  
Diethylene Triamine ◽  
Bamboo Pulp ◽  
Cooking Temperature ◽  
Optimized Conditions

DTPMPA (Diethylene Triamine Penta Methylene Phosphonic Acid) was used as cooking additive in Bamboo pulping. The effect of cooking parameters such as alkali charge, maximum cooking temperature, and time at maximum temperature on bamboo kraft pulping adding additive Diethylene Triamine Penta Methylene Phosphonic Acid was studied. The results show that the optimized bamboo kraft pulping conditions are: alkali charge 17%, maximum cooking temperature 162°C, and time at maximum temperature 60min when DTPMPA dosage is 0.4%. On the optimized conditions of cooking, the highest screened bamboo pulp yield 49.52%, the kappa number of bamboo pulp is 24.68, residual alkali in kraft waste liquor 3.62g/L .

Effect of DTPMPA on Bamboo Kraft Pulping

2014 ◽  
Vol 1033-1034 ◽  
pp. 216-219
Author(s):  
Hong Xia Gao ◽  
Xiu Qiong Guan ◽  
Miao Xu ◽  
Xiong Zhang
Keyword(s):  
Phosphonic Acid ◽  
Kraft Pulping ◽  
Maximum Temperature ◽  
K Value ◽  
Diethylene Triamine ◽  
Bamboo Pulp ◽  
Cooking Temperature ◽  
The Impact

As a cooking additive, the impact of Diethylene Triamine Penta Methylene Phosphonic Acid (DTPMPA) on bamboo kraft pulping was studied. The effect of DTPMPA dosage at different maximum cooking temperature was discussed. The results showed that the cooking aids DTPMPA added in bamboo kraft pulping was able to reduce K value of pulp, improve the screened stock yield and brightness and reduce the alkali charge. The optimized bamboo kraft pulping conditions are: DTPMPA dosage 0.3%, alkali charge 17%, when sulfidity was 20%, maximum cooking temperature was 160°C and time at maximum temperature was 90min. Under the conditions of cooking, the screened yield is 41.53%, the K value is 15.4 and the bamboo pulp brightness is 26.8%.

Study on DTPMPA as Cooking Additive in Bamboo Pulping

2013 ◽  
Vol 781-784 ◽  
pp. 2601-2604
Author(s):  
Hong Xia Gao ◽  
Jing Zhang
Keyword(s):  
Phosphonic Acid ◽  
Chelating Agents ◽  
Kraft Pulping ◽  
Maximum Temperature ◽  
Pulp Yield ◽  
K Value ◽  
Diethylene Triamine ◽  
Bamboo Pulp ◽  
Cooking Temperature ◽  
Optimized Conditions

The application of chelating agents DTPMPA (Diethylene Triamine Penta Methylene Phosphonic Acid) as cooking aids in kraft pulping of bamboo was researched. The effect of DTPMPA dosage at different alkali charge was discussed. The results showed that the cooking aids DTPMPA added in bamboo kraft pulping was able to reduce K value of pulp, improve the screened stock yield and brightness and reduce the alkali charge. The optimized bamboo kraft pulping conditions are: DTPMPA dosage 0.4%, alkali charge 19%, when sulfidity was 20%, maximum cooking temperature was 165°C and time at maximum temperature was 90min. Under optimized conditions of cooking, the screened bamboo pulp yield is higher, the K value is lower and the bamboo pulp brightness is higher.

Prehydrolysis kraft pulping of jute cutting and caddis mixture for rayon production

TAPPI Journal ◽  
2019 ◽  
Vol 18 (5) ◽  
pp. 287-293 ◽  
Author(s):  
JANNATUN NAYEEM ◽  
M. SARWAR JAHAN ◽  
RAZIA SULTANA POPY ◽  
M. NASHIR UDDIN ◽  
M.A. QUAIYYUM
Keyword(s):  
Kraft Pulping ◽  
Kappa Number ◽  
Pulp Yield ◽  
Solid Residue ◽  
Rayon Production ◽  
Kraft Cooking ◽  
Prehydrolysis Kraft

Jute cutting, jute caddis, and cutting-caddis mixtures were prehydrolyzed by varying time and temperature to get about 90% prehydrolyzed yield. At the conditions of 170°C for 60 min of prehydrolysis, the yield for 100% jute cutting was 76.3%, while the same for jute caddis was only 67.9%. But with prehydrolysis at 150°C for 60 min, the yield was 90% for jute cutting, where 49.94% of original pentosan was dissolved and prehydrolysis of jute caddis at 140°C in 60 min yielded 86.4% solid residue. Jute cutting-caddis mixed prehydrolysis was done at 140°C for 30 min and yielded 92% solid residue for 50:50 cutting-caddis mixtures, where pentosan dissolution was only 29%. Prehydrolyzed jute cutting, jute caddis, and cutting-caddis mixtures were subsequently kraft cooked. Pulp yield was only 40.9% for 100% jute cutting prehydrolyzed at 170°C for 60 min, which was 10.9% lower than the prehydrolysis at 140°C. For jute cutting-caddis mixed prehydrolysis at 140°C for 45 min followed by kraft cooking, pulp yield decreased by 3.3% from the 100% cutting to 50% caddis in the mixture, but 75% caddis in the mixture decreased pulp yield by 6.7%. The kappa number 50:50 cutting-caddis mixture was only 11.3. Pulp bleachability improved with increasing jute cutting proportion in the cutting-caddis mixture pulp.

Does the kappa number method accurately reflect lignin content in nonwood pulps?

TAPPI Journal ◽  
2018 ◽  
Vol 17 (11) ◽  
pp. 611-617
Author(s):  
Sabrina Burkhardt
Keyword(s):  
Lignin Content ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Original Data ◽  
Kappa Number ◽  
Klason Lignin ◽  
Organic Functional Groups ◽  
Pulp Properties ◽  
Wood Pulps ◽  
Hexenuronic Acid

The traditional kappa number method was developed in 1960 as a way to more quickly determine the level of lignin remaining in a completed or in-progress pulp. A significantly faster approach than the Klason lignin procedure, the kappa number method is based on the reaction of a strong oxidizing agent (KMnO4) with lignin and small amounts of other organic functional groups present in the pulp, such as hexenuronic acid. While the usefulness of the kappa number for providing information about bleaching requirements and pulp properties has arguably transformed the pulp and paper industry, it has been mostly developed for kraft, sulfite, and soda wood pulps. Nonwood species have a different chemical makeup than hardwood or softwood sources. These chemical differ-ences can influence kappa and Klason measurements on the pulp and lead to wide ranges of error. Both original data from Sustainable Fiber Technologies’ sulfur and chlorine-free pulping process and kappa and Klason data from various nonwood pulp literature sources will be presented to challenge the assumption that the kappa number accurately represents lignin content in nonwood pulps.

scholarly journals Copper(II) Complexes of Organophoshonic Acids-A Comparative Study

2011 ◽  
Vol 8 (s1) ◽  
pp. S271-S281
Author(s):  
B. Venkateswara Rao ◽  
D. M. Puri
Keyword(s):  
Phosphonic Acid ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Diphosphonic Acid ◽  
Paramagnetic Resonance ◽  
Diethylene Triamine ◽  
Coordination Sites ◽  
Infrared Spectral ◽  
Electron Paramagnetic ◽  
Derivatives Of

Polynuclear copper(II) derivatives of 1-hydroxyethylidenediphosphonic acid (HEDP), 1-aminoethylidenediphosphonic acid (AEDP, H4L),α-aminobenzylidene diphosphonic acid (ABDP, H4L), 1-amino-2-carboxyethane- 1,1-diphosphonic acid (ACEDP, H5L), 1,3 diaminopropane-1,1,3,3-tetra-phosphonic acid (DAPTP, H8L), Ethylenediamine-N,N'-bis (dimethyl-methylenephosphonic) acid (EDBDMPO, H4L),o-phenylene-diamine-N,N'-bis (dimethylmethylenephosphonic) acid (PDBDMPO, H4L), diethylene triamine –N,N,N',N',N"N-penta (methylene phosphonic) acid (DETAPMPO, H10L) and diethylene triamine –N,N"-bis (dimethyl methylene phosphonic) acid (DETBDMPO, H4L) have been prepared in aqueous medium. The general formula of derivatives from elemental analysis was found to be Cu2L.XH2O (in case of AEDP, ABDP, EDBDMPO, PDBDMPO, DETBDMPO), Cu5L2.XH2O (in case of ACEDP) Cu4L.XH2O, Cu2H4L. XH2O (in case of DAPTP) and Cu5L.XH2O (in case of DETAPMPO). The electronic spectra have shown them to be six coordinated with slight distortion from octahedral geometry. Antiferromagnetism was inferred from magnetic moment data. Infrared spectral studies were carried out to determine coordination sites. EPR (Electron Paramagnetic Resonance) spectra that supports the presence of tetragonal distortion and antiferromagnetic behaviour, have also been studied.

scholarly journals Corrosion Inhibition by Sodium Gluconate-Zn2+-DTPMP System

2009 ◽  
Vol 6 (3) ◽  
pp. 887-897 ◽  
Author(s):  
P. Manjula
Keyword(s):  
Phosphonic Acid ◽  
Inhibition Efficiency ◽  
Impedance Spectrum ◽  
Protective Film ◽  
Sodium Gluconate ◽  
Diethylene Triamine ◽  
Atomic Force ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiency of a phosphonic acid, Diethylene Triamine Pentamethylene Phosphonic acid (DTPMP) in controlling corrosion of carbon steel immersed in an aqueous solution containing 60 ppm of Cl-has been evaluated by weight loss method in the absence and presence of Zn2+. The formulation consisting of DTPMP and Zn2+has excellent inhibition efficiency (IE). A synergistic effect is noticed between Zn2+and DTPMP. Addition of sodium gluconate (SG) enhances the IE of Zn2+and DTPMP system. The DTPMP-Zn2+-SG system function as a mixed inhibitor as revealed by polarization study. AC impedance spectrum, optical and atomic force micrographs reveal the formation of a protective film on the metal surface. FTIR spectra reveal that the protective film consists of Fe2+-DTPMP complex, Fe2+-SG complex and Zn(OH)2.

scholarly journals NIRS Characterization of Paper Pulps to Predict Kappa Number

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ana Moral ◽  
Elena Cabeza ◽  
Roberto Aguado ◽  
Antonio Tijero
Keyword(s):  
Near Infrared ◽  
Raw Materials ◽  
Analytical Techniques ◽  
Kappa Number ◽  
Point Of View ◽  
The World ◽  
Pulp Properties ◽  
Special Relevance

Rice is one of the most abundant food crops in the world and its straw stands as an important source of fibres both from an economic and an environmental point of view. Pulp characterization is of special relevance in works involving alternative raw materials, since pulp properties are closely linked to the quality of the final product. One of the analytical techniques that can be used in pulp characterization is near-infrared spectroscopy (NIRS). The use of NIRS has economic and technical advantages over conventional techniques. This paper aims to discuss the convenience of using NIRS to predict Kappa number in rice straw pulps produced under different conditions. We found that the resulting Kappa number can be acceptably estimated by NIRS, as the errors obtained with that method are similar to those found for other techniques.

scholarly journals Ozone Oxidation of Kraft Bamboo Pulp for Preparation of Nanofibrillated Cellulose

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Mingyou Liu ◽  
Xia Chen ◽  
Xiaofei Tian
Keyword(s):  
Aspect Ratio ◽  
Nanofibrillated Cellulose ◽  
Kappa Number ◽  
Efficient Production ◽  
Bamboo Pulp ◽  
Alternative Approach ◽  
Carboxylate Content ◽  
Pulp Consistency ◽  
20 Nm ◽  
Optimized Conditions

The influence of ozonation on the homogenization of Kraft bamboo pulp (KBP) for the production of nanofibrillated cellulose (NFC) was studied. Using optimized conditions for ozonation, that is, pulp consistency 35%, ozone dosage 0.87% (v/w), and pH=2.5, the kappa number and viscosity of KBP decreased from 10.8 to 2.8 and from 1024 mL∙g−1 to 258 mL∙g−1, respectively, while the crystallinity and carboxylate content increased from 36.2% to 48% and 0.93 mmol/g to 1.26 mmol/g, respectively. The ozonation-treated KPB was used as the substrate for NFC preparation through homogenization. With a width of 10–20 nm and length≥250 nm, the prepared NFC had a high aspect ratio of length versus width. Ozonation can be used as an alternative approach to promote the efficient production of NFC from KBP.

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