CN1250672C - 醋酸钙融雪剂的制备方法 - Google Patents

醋酸钙融雪剂的制备方法 Download PDF

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CN1250672C
CN1250672C CNB2004100113858A CN200410011385A CN1250672C CN 1250672 C CN1250672 C CN 1250672C CN B2004100113858 A CNB2004100113858 A CN B2004100113858A CN 200410011385 A CN200410011385 A CN 200410011385A CN 1250672 C CN1250672 C CN 1250672C
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waste water
calcium acetate
snow melting
raffinate
furfural
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CN1648193A (zh
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于广军
朱果逸
张书义
寇艳秋
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JIACHEN ENVIRONMENT PROTECTION EQUIPMENT CO Ltd CHUANCHUN CITY
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41Preparation of salts of carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/18Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
    • C09K3/185Thawing materials
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048Purification of waste water by evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/36Organic compounds containing halogen
    • C02F2101/366Dioxine; Furan
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds

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  • Chemical & Material Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Water Treatment By Sorption (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
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Abstract

本发明涉及一种醋酸钙融雪剂的制备方法,属于一种融雪剂的制备方法。包括下列步骤:一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,使该废水中和到pH值7~8;二、残液浓缩:用双效蒸发系统使废水中的水分蒸发,残液得到浓缩;三、吸附过滤:将残液移入反应釜中,加入粉状活性炭,吸附,离心,过滤;四、烘干滤液:析出白色醋酸钙。优点在于:原料中醋酸来自糠醛生产中的塔底废水,在对其进行处理的同时,得到醋酸钙,使废水资源化,污水零排放。得到的酸钙,纯度可达92%,完全符合融雪剂的质量标准。使融雪剂制造成本大大降低。

Description

醋酸钙融雪剂的制备方法
技术领域
本发明属于一种融雪剂的制备方法,尤其是指一种醋酸钙的制备方法。
背景技术
北方的冬季都需要大量的融雪剂来融化道路上的积雪,目前许多融雪剂都存在着污染环境、融雪效果不佳、融雪速度慢等缺点。在各种融雪剂中,醋酸钙是较好的一种,它对环境的污染程度低,融雪效果好。醋酸钙的制备通常是采用醋酸和石灰石反应或是和氧化钙、氢氧化钙反应,该方法存在的缺点是成本高,工艺流程长。同时也增加了冬季城市融雪的支出。玉米芯深加工生产糠醛始于上个世纪的三十年代,我国于五十年代引进,全面发展的局面始于八十年代的后中期,目前对糠醛及其下游产品的需求迅速增加,目前全国约有二百余个厂家在进行糠醛的生产。其工艺流程为:将玉米芯破碎,通入蒸汽、稀硫酸水解,冷凝,得原液,再用蒸馏塔进行蒸馏,得粗醛。蒸馏塔进行蒸馏时,产生塔底废水,这也就是糠醛生产中主要的废水来源,被称为糠醛废水。一般年产千吨的糠醛厂,日糠醛废水排放量100吨左右,COD在15000~25000之间,约含1.5~2.5%的醋酸,系污染物的主要物质,如果没有有效的水污染防治措施,污染将相当严重。
发明内容
本发明提供一种醋酸钙融雪剂的制备方法,以解决目前醋酸钙的制备方法存在的成本高,工艺流程长的缺点,并且解决了糠醛废水中醋酸的污染问题。本发明采取的技术方案是:包括下列步骤:
一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,接触时间为1~1.5小时,使该废水中和到PH值7~8;
二、残液浓缩:经中和PH值为7~8的废水进入双效蒸发系统,使废水中的水分蒸发,残液得到浓缩,当浓缩液固体含量为40%时,排出;
三、吸附过滤:将步骤二中排出的残液移入反应釜中,加入其重量10%~15%的粉状活性炭,加热至沸腾1小时、吸附,用离心机离心,转数1800~1900转/分,过滤;
四、烘干滤液:将步骤三中滤出液体烘干,析出白色醋酸钙。
本发明的优点在于:原料中醋酸来自糠醛生产中的塔底废水,在对其进行处理的同时,得到醋酸钙,使废水资源化,污水零排放。使醋酸钙成本大大降低,既使糠醛生产中的塔底废水得到了处理,又得到了醋酸钙,纯度可达92%,完全符合融雪剂的质量标准。使融雪剂制造成本大大降低。
具体实施方式
实施例1
包括下列步骤:
一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,接触时间为1小时,使该废水中和到PH值7;
二、残液浓缩:经中和PH值为7的废水进入双效蒸发系统,使废水中的水分蒸发,残液得到浓缩,当浓缩液固体含量为40%时,排出;
三、吸附过滤:将步骤二中排出的残液移入反应釜中,加入其重量10%的粉状活性炭,加热沸腾1小时、吸附,用离心机离心,转数1800/分,过滤;
四、烘干滤液:将步骤三中滤出液体烘干,析出白色醋酸钙。
实施例2
包括下列步骤:
一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,接触时间为1.3小时,使该废水中和到PH值7.5;
二、残液浓缩:经中和PH值为7.5的废水进入双效蒸发系统,使废水中的水分蒸发,残液得到浓缩,当浓缩液固体含量为40%时,排出;
三、吸附过滤:将步骤二中排出的残液移入反应釜中,加入其重量12%的粉状活性炭,加热沸腾1小时、吸附,用离心机离心,转数1860/分,过滤;
四、烘干滤液:将步骤三中滤出液体烘干,析出白色醋酸钙。
实施例3
包括下列步骤:
一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,接触时间为1.5小时,使该废水中和到PH值8;
二、残液浓缩:经中和PH值为8的废水进入双效蒸发系统,使废水中的水分蒸发,残液得到浓缩,当浓缩液固体含量为40%时,排出;
三、吸附过滤:将步骤二中排出的残液移入反应釜中,加入其重量15%的粉状活性炭,加热沸腾1小时、吸附,用离心机离心,转数1900/分,过滤;
四、烘干滤液:将步骤三中滤出液体烘干,析出白色醋酸钙。

Claims (1)

1、一种醋酸钙融雪剂的制备方法,包括下列步骤:
一、废水中和:糠醛生产中产生的塔底废水经过一个由石灰石构成的流化床,接触时间为1~1.5小时,使该废水中和到PH值7~8;
二、残液浓缩:经中和PH值为7~8的废水进入双效蒸发系统,使废水中的水分蒸发,残液得到浓缩,当浓缩液固体含量为40%时,排出;
三、吸附过滤:将步骤二中排出的残液移入反应釜中,加入其重量10%~15%的粉状活性炭,加热沸腾1小时、吸附,用离心机离心,转数1800~1900转/分,过滤;
四、烘干滤液:将步骤三中滤出液体烘干,析出白色醋酸钙。
CNB2004100113858A 2004-12-24 2004-12-24 醋酸钙融雪剂的制备方法 Expired - Fee Related CN1250672C (zh)

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KR101305589B1 (ko) 2011-02-28 2013-09-09 양정목 부산물 초산을 이용한 초산칼슘 제조방법 및 제조장치
CN102442793B (zh) * 2011-10-13 2013-08-07 大连理工大学 一种制砖材料的改性方法
CN102616871B (zh) * 2012-03-20 2013-09-04 蓝保(厦门)水处理科技有限公司 一种无机脱色水处理剂及其制备方法
CN102690632B (zh) * 2012-06-15 2014-05-14 天津喜研科技有限公司 一种木醋液制备环保融雪剂的方法
CN107021881A (zh) * 2016-12-27 2017-08-08 榆林职业技术学院 一种乙酸废液回收利用方法
CN106867454B (zh) * 2017-03-02 2018-10-12 辽宁科技学院 一种利用草木灰制备醋酸钾融雪剂的工艺
CN111471432A (zh) * 2020-04-03 2020-07-31 安徽科安废盐资源化有限公司 一种利用工业废杂盐制备融雪剂的方法
CN112979452A (zh) * 2021-02-25 2021-06-18 上海第二工业大学 利用废弃液晶面板偏光膜热解气/油制备环保型醋酸钙融雪剂的方法
CN115594343B (zh) * 2022-10-18 2024-06-04 安徽金轩科技有限公司 一种糠醛废水的处理方法

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SU1474158A1 (ru) * 1986-10-21 1989-04-23 Институт химии древесины АН ЛатвССР Способ получени уксуснокислого кальци
CN1141302C (zh) * 2001-03-08 2004-03-10 水志良 糠醛废水治理及回收糠醛和醋酸工艺
CN1142107C (zh) * 2001-06-06 2004-03-17 水志良 糠醛废水治理及回收醋酸丁酯、硫酸铵、醋酸铵、乙酰胺和乙腈方法

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