Solid-liquid phase equilibrium of dipentaerythritol in three mixed solvents

LI Tao; SHA Jiao; ZHAO Rui; ZHANG Pengshuai; LIU Shiqi; LI Yu; REN Baozeng

doi:10.11949/0438-1157.20191215

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Solid-liquid phase equilibrium of dipentaerythritol in three mixed solvents

Thermodynamics | 更新时间：2026-07-24

- Solid-liquid phase equilibrium of dipentaerythritol in three mixed solvents
- CIESC Journal Vol. 71, Issue 1, Pages: 245-253(2020)
- 作者机构：
  
  1. 郑州大学化工学院，河南郑州 450001
  2. 河南化工技师学院，河南开封 475000
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20191215
  CLC： TQ 028.8
- Received：23 October 2019，
  
  Revised：2019-10-30，
  
  Online First：12 August 2020，
  
  Published：05 January 2020
- 稿件说明：
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李涛, 沙娇, 赵瑞, 张鹏帅, 刘士琪, 李玉, 任保增. 双季戊四醇在3种混合溶剂中的固-液相平衡[J]. 化工学报, 2020, 71(1): 245-253

LI Tao, SHA Jiao, ZHAO Rui, ZHANG Pengshuai, LIU Shiqi, LI Yu, REN Baozeng. Solid-liquid phase equilibrium of dipentaerythritol in three mixed solvents[J]. CIESC Journal, 2020, 71(1): 245-253
李涛, 沙娇, 赵瑞, 张鹏帅, 刘士琪, 李玉, 任保增. 双季戊四醇在3种混合溶剂中的固-液相平衡[J]. 化工学报, 2020, 71(1): 245-253 DOI： 10.11949/0438-1157.20191215.

LI Tao, SHA Jiao, ZHAO Rui, ZHANG Pengshuai, LIU Shiqi, LI Yu, REN Baozeng. Solid-liquid phase equilibrium of dipentaerythritol in three mixed solvents[J]. CIESC Journal, 2020, 71(1): 245-253 DOI： 10.11949/0438-1157.20191215.

摘要

采用动态平衡法，在293.15～332.80 K、常压下，测定了双季戊四醇(DPE)在水+(甲醇、乙醇、异丙醇)三种混合溶剂中的溶解度数据。结果表明：DPE在不同质量分数的水+(甲醇、乙醇、异丙醇)混合溶剂中的溶解度随体系温度升高而增大；同一温度下，其在所选取溶剂体系中的溶解度随着甲醇、乙醇或异丙醇质量分数的增大而先增大后减小。

λh

方程、两参数方程与Apelblat方程均能够对所测定的溶解度数据进行较好的关联；通过修正的van’t Hoff方程计算得到DPE在所选取溶剂体系中Δ

sol

、Δ

sol

和Δ

sol

均大于零，表明DPE在所选取溶剂体系中的溶解过程为吸热、熵增的非自发过程。

Abstract

In this paper

by the dynamic balance method

the solubility of dipentaerythritol (DPE) in water+(Methanol

ethanol

isopropanol) mixed solvents were evaluated from 293.15 K to 332.80 K under atmospheric pressure. The results showed that the solubility of DPE in different mass fractions of water + (methanol

ethanol

isopropanol) mixed solvents increases with the increasing of temperature. At the same temperature

the solubility in the selected solvent system increases first and then decreases with the increase of the mass fraction of methanol

ethanol or isopropanol. Experimental solubility data were correlated by three thermodynamic models i

ncluding

λh

equation

the two parameters equation and the modified Apelblat equation. All the selected models give useful result in regression analysis of solubility. By the modified van t Hoff equation

the calculated Δ

sol

and Δ

sol

of DPE in the selected solvent system are all positive

indicating that the dissolution process is endothermic

entropic and non spontaneous.

关键词

Keywords

references

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